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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2025

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period fromto

Commission File Number: 001-39724

LIQUIDIA CORPORATION

(Exact Name of Registrant as Specified in Its Charter)

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Registrant’s telephone number, including area code: (919) 328-4400

Securities registered pursuant to Section 12(b) of the Act:

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Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

The aggregate market value of common stock held by non-affiliates of the registrant on June 30, 2025 which was the last business day of the registrant’s most recently completed second fiscal quarter, was $847,006,478 based on a $12.46 closing price per share as reported on the Nasdaq Capital Market.

As of February 17, 2026, there were 88,114,429 shares of the registrant’s common stock outstanding.

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DOCUMENTS INCORPORATED BY REFERENCE

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LIQUIDIA CORPORATION

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This Annual Report on Form 10-K includes our trademarks, trade names and service marks, such as Liquidia, the Liquidia logo, YUTREPIA and PRINT, which are protected under applicable intellectual property laws and are the property of Liquidia Technologies, Inc. This Annual Report on Form 10-K also contains trademarks, trade names and service marks of other companies, which are the property of their respective owners. Solely for convenience, trademarks, trade names and service marks referred to in this Annual Report on Form 10-K may appear without the ®, ™ or ^SM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or the right of the applicable licensor to these trademarks, trade names and service marks. We do not intend our use or display of other parties’ trademarks, trade names or service marks to imply, and such use or display should not be construed to imply, a relationship with, or endorsement or sponsorship of us by, these other parties.

Cautionary Note Regarding Forward-Looking Statements

This Annual Report on Form 10-K contains forward-looking statements. All statements other than statements of historical facts contained in this Annual Report on Form 10-K may be forward-looking statements. We intend such forward-looking statements to be subject to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, including Section 27A of the Securities Act of 1933, as amended (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).The forward-looking statements are contained principally in the sections entitled “Risk Factors,” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” but are also contained elsewhere in this Annual Report on Form 10-K. In some cases, you can identify forward-looking statements by terms such as “anticipates,” “believes,” “contemplates,” “continue,” “could,” “estimates,” “expects,” “intends,” “may,” “might,” “plans,” “potential,” “predicts,” “projects,” “should,” “targets,” “will,” “would” or the negative of these terms or other similar expressions. Forward-looking statements involve known and unknown risks, uncertainties and other important factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Forward-looking statements include, but are not limited to, statements about:

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You should refer to the “Risk Factors” section of this Annual Report on Form 10-K for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. The forward-looking statements in this Annual Report on Form 10-K are only predictions, and we may not actually achieve the plans, intentions or expectations included in our forward-looking statements. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and results of operations. Because forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified, you should not rely on these forward-looking statements as predictions of future events. The events and circumstances reflected in our forward-

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looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements.

These forward-looking statements speak only as of the date of this Annual Report on Form 10-K. While we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should therefore not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this Annual Report on Form 10-K.

Unless the context otherwise requires, references in this Annual Report on Form 10-K to “we,” “us”, “our”, “Liquidia” and the “Company” refer to Liquidia Corporation, a Delaware corporation, and unless specified otherwise, include our wholly owned subsidiaries, Liquidia Technologies, Inc., a Delaware corporation (“Liquidia Technologies”) and Liquidia PAH, LLC (formerly known as RareGen, LLC (“RareGen”)), a Delaware limited liability company (“Liquidia PAH”).

PART I

Item 1. Business.

Overview

We are a biopharmaceutical company driven by science and compassion to revolutionize care for patients with challenging respiratory and vascular diseases such as pulmonary arterial hypertension (“PAH”) and pulmonary hypertension associated with interstitial lung disease (“PH-ILD”). We operate through our wholly owned operating subsidiaries, Liquidia Technologies, Inc. and Liquidia PAH, LLC, formerly known as RareGen.

We currently generate revenue through the sale of YUTREPIA (treprostinil) inhalation powder (“YUTREPIA”) and pursuant to a promotion agreement with Sandoz Inc. (“Sandoz”), dated as of August 1, 2018, as amended (the “Promotion Agreement”), under which we share profit derived from the sale of Sandoz’s generic treprostinil injection (“Treprostinil Injection”) in the United States.

We employ a targeted commercial field force calling on healthcare providers involved in the treatment of PAH and PH-ILD in the United States, as well as key stakeholders involved in the distribution and reimbursement of medicines to treat these patients.

YUTREPIA is an inhaled dry powder formulation of treprostinil designed with our proprietary PRINT technology, a particle engineering platform that enables precise production of uniform drug particles, to improve the therapeutic profile of treprostinil by enhancing deep lung delivery while using a convenient, low effort dry-powder inhaler (“DPI”) and by achieving higher dose levels than the labeled doses of other marketed inhaled treprostinil therapies. YUTREPIA was approved by the U.S. Food and Drug Administration (“FDA”) in May 2025 for the treatment of both PAH and PH-ILD, and began commercialization in June 2025.

Treprostinil Injection is a fully-substitutable generic treprostinil for parenteral administration in the United States. We have the exclusive rights to conduct commercial activities for Treprostinil Injection and work jointly with Sandoz on commercial strategy for the product. Sandoz retains all other rights in and to Treprostinil Injection and holds the Abbreviated New Drug Application (“ANDA”) for Treprostinil Injection.

We also conduct research, development and manufacturing of novel products by applying our subject matter expertise in respiratory and vascular diseases. For example, we are currently developing L606, an investigational, liposomal formulation of treprostinil, which we licensed from Pharmosa Biopharm Inc. (“Pharmosa”), that is administered twice-daily with a short-duration next-generation nebulizer. L606 is currently being evaluated in an open-label study in the United States for treatment of PAH and PH-ILD, and we have initiated a worldwide, placebo-controlled pivotal study for the treatment of PH-ILD. We are also planning to conduct clinical studies to evaluate YUTREPIA for the treatment of pulmonary hypertension associated with chronic obstructive pulmonary disease (“PH-COPD”), idiopathic pulmonary

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fibrosis (“IPF”), progressive pulmonary fibrosis (“PPF”) and Raynaud’s phenomenon associated with systemic sclerosis (“SSc-RP”).

About Pulmonary Arterial Hypertension and Pulmonary Hypertension Associated with Interstitial Lung Disease

Diseases

Pulmonary hypertension (“PH”) is divided into five groups based on the criteria of the World Health Organization (“WHO”) as defined at the 8th World Symposium on Pulmonary Hypertension. WHO Group 1 is comprised of individuals with PAH. WHO Group 3 includes patients with pulmonary hypertension caused by hypoxia and/or lung diseases, mostly interstitial lung disease (“ILD”), chronic obstructive pulmonary disease (“COPD”) and sleep-disordered breathing. Our current products initially seek to address unmet needs in PAH and PH-ILD.

PAH is a rare, chronic, progressive disease caused by hardening and narrowing of the pulmonary arteries that can lead to right heart failure and eventually death, with an estimated diagnosed, treated prevalence in the United States of approximately 45,000 patients.

PH-ILD is the second most prevalent form of Group 3 PH (precapillary PH due to lung disease). ILD is a diverse collection of more than 150 different pulmonary diseases, including IPF, chronic hypersensitivity pneumonitis, connective tissue disease related ILD, and sarcoidosis among others. We currently estimate diagnosed and undiagnosed prevalence of PH-ILD in the United States to be approximately 60,000. The prevalence of PH in many of the underlying ILD diseases is not yet known due to factors including underdiagnosis and lack of approved treatments until 2021.

Treatments

There is currently no cure for PAH or PH-ILD, so the goals of existing treatments are to alleviate symptoms, maintain or improve functional class, delay disease progression and improve quality of life. The FDA has approved several classes of drugs to treat PAH over the last 25 years, including drugs acting through the prostacyclin pathway, the nitric oxide pathway, the endothelin pathway, and the inhibition of activin signaling. There are currently only three FDA-approved treatments for PH-ILD, all of which are inhaled forms of treprostinil, a prostacyclin analog. Without a curative treatment, we expect continued development of new mechanisms of action that may be used in combination with approved treatments.

Drugs targeting the prostacyclin pathway are central to PAH and PH-ILD therapy. Prostacyclin analogs, like treprostinil, have been developed for continuous infusion, inhalation and oral administration. The maximal efficacy benefit of any one drug in the prostacyclin pathway is partially limited by its specific safety profile and the burden of administration. Increased drug exposure of prostacyclin analogs like treprostinil, if tolerated by the patient, has demonstrated increased clinical benefit, making it the only titratable mechanism of action to treat these diseases.

Delivering prostacyclin analogs by inhalation has been effective and causes fewer systemic side effects than parenteral and oral formulations. Inhalation helps supplement the endogenous production of prostacyclin where it is normally synthesized, near the targeted pulmonary arteries. As a result, inhaled prostacyclin analogs help avoid side effects related to off-target tissues and take advantage of binding key prostacyclin receptors that are preferentially expressed in the lung. The only inhaled prostacyclin analogs approved by the FDA are nebulized Ventavis® (iloprost), nebulized Tyvaso® (treprostinil), Tyvaso DPI® (treprostinil), which is United Therapeutics’ dry powder inhaled formulation, and YUTREPIA, which is our dry powder inhaled formulation. Observations from a large retrospective study of Tyvaso supported the finding that higher doses of inhaled treprostinil correlated to better clinical outcomes including delayed transition to more invasive administration, persistence on therapy, and improved three-year survival. With regard to PH-ILD, there is growing medical preference for inhaled therapies to avoid ventilation-perfusion mismatch resulting from systemic delivery of prostacyclins. In March 2021, the FDA approved Tyvaso as the first treatment for PH-ILD. Tyvaso DPI and YUTREPIA were subsequently approved as treatment options upon their approval by the FDA in May 2022 and May 2025, respectively.

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Systemic delivery of prostacyclin has proven effective but challenging, especially in those patients who have progressed to more severe forms of PAH. Parenteral delivery of prostacyclin analogs by continuous infusion via intravenous or subcutaneous administration, like Remodulin^® (treprostinil) and epoprostenol, are considered the most effective treatment for PAH; however, the burden of external pumps and side-effect profiles have limited their use to severely ill patients. Regardless, physicians have come to rely on these pump-delivered products to stabilize rapidly declining patients to slow disease progression and to ensure the mechanism of action is fully maximized.

Oral tablet delivery of prostacyclin analogs two or three times a day, like Orenitram^® (treprostinil), or agonists of the prostacyclin signaling pathway, like Uptravi^® (selexipag), improve convenience compared to infusions, but does not address the off-target toxicities that limit optimal dosing. New patients to oral delivery may not be able to titrate to known therapeutic levels.

Other Diseases Being Investigated by Liquidia

Pulmonary Hypertension Associated with Chronic Obstructive Pulmonary Disease (“PH-COPD”). PH-COPD is a serious complication of COPD characterized by elevated pulmonary arterial pressure resulting from chronic hypoxia, vascular remodeling and destruction of the pulmonary capillary bed. The development of pulmonary hypertension in COPD patients is associated with worsening dyspnea, reduced exercise capacity, increased risk of hospitalization and decreased survival. There are currently no approved therapies specifically indicated for PH-COPD, and treatment typically focuses on management of the underlying COPD and supportive care.

Idiopathic Pulmonary Fibrosis (“IPF”). IPF is a rare, chronic, progressive and ultimately fatal interstitial lung disease of unknown cause characterized by fibrosis and scarring of lung tissue, leading to a steady decline in lung function. IPF primarily affects older adults and is associated with worsening shortness of breath, persistent cough and impaired quality of life. Although antifibrotic therapies are available and may slow disease progression, there is no cure.

Progressive Pulmonary Fibrosis (“PPF”). PPF refers to a group of interstitial lung diseases, other than IPF, that demonstrate a progressive fibrosing phenotype characterized by worsening respiratory symptoms, decline in lung function and increasing fibrosis on imaging despite standard treatment. PPF is associated with significant morbidity and mortality, and disease progression may result in respiratory failure and reduced survival. Treatment options are limited, and management typically involves antifibrotic therapy, immunosuppression in certain subtypes and supportive care.

Raynaud’s Phenomenon Associated with Systemic Sclerosis (“SSc-RP”). SSc-RP is a vascular manifestation of systemic sclerosis characterized by episodic vasospasm of the digital arteries in response to cold or stress, resulting in color changes, pain and numbness in the fingers and toes. In patients with systemic sclerosis, recurrent and severe vasospastic episodes may lead to digital ulcers, infection and tissue loss. Treatment options are limited and focus on vasodilator therapies and supportive measures, and significant unmet medical need remains in patients with refractory disease.

Our Products and Product Candidates

YUTREPIA (treprostinil) Inhalation Powder to Treat PAH and PH-ILD

Our product, YUTREPIA(treprostinil) inhalation powder, is an inhaled dry-powder formulation of treprostinil designed to improve the therapeutic profile of treprostinil by enhancing deep lung delivery and achieving higher dose levels than the labeled doses of other inhaled therapies while using a convenient, easy-to-use dry-powder inhaler, the RS00 Model DPI. YUTREPIA was approved by the FDA for the treatment of both PAH and PH-ILD in May 2025 and was launched in June 2025.

We believe YUTREPIA can become the prostacyclin of first choice across the disease continuum in PAH and PH-ILD because of its convenience, low-effort device and the ability to titrate to higher doses.

Each particle of YUTREPIA has been designed using our PRINT technology to have uniform size and shape to achieve enhanced aerosolization and deposition in the lungs. As a result, our PRINT formulation does not require deagglomeration by a patient actuated breath and can be effectively delivered using a low-effort, patient-friendly device

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and minimal inspiratory effort. The RS00 Model DPI device used to deliver YUTREPIA is robust with regard to position and accidental movements and has been used globally to deliver drugs to patients with compromised lung function, like asthma, COPD, and cystic fibrosis.

YUTREPIA has been safely titrated to doses higher than the target labeled doses of Tyvaso and Tyvaso DPI. Historically, the labeled dose range for inhaled treprostinil has been 9-12 nebulized breaths per session (“bps”), for Tyvaso and the corresponding doses of Tyvaso DPI (up to 64 mcg, comparable to 12 bps). In contrast, YUTREPIA has been studied in PAH patients up to 291.5 mcg four times a day (comparable to at least 33 bps of Tyvaso), and in PH-ILD patients, as high as 424 mcg (comparable to at least 48 bps of Tyvaso) as part of an on-going open-label clinical study. The different combinations of YUTREPIA’s four proposed capsule-strengths allow customized dosing and titration based on a patient’s disease progression. This expanded dose range of YUTREPIA may allow patients to remain on inhaled treprostinil therapy longer before transitioning to more invasive parenteral therapies.

In clinical studies required for approval, YUTREPIA was shown to be safe, well-tolerated and effective regardless of a patient’s previous exposure to treprostinil. Prostacyclin-naïve patients achieved comparable dosing to the transition patients within the first two months of treatment. Patients on a stable dose of Tyvaso successfully transitioned to YUTREPIA while maintaining or improving clinical outcomes as measured by exploratory endpoints. The combination of data from both patient groups provides confidence that a physician may prescribe YUTREPIA across a continuum of PAH and PH-ILD patients.

We developed YUTREPIA under the 505(b)(2) regulatory pathway using the nebulized form of treprostinil, Tyvaso, as the reference listed drug. This regulatory pathway allowed us to rely in part on the FDA’s previous findings of efficacy and safety of Tyvaso and the active ingredient treprostinil. However, as a result of our having used the 505(b)(2) regulatory pathway, our ability to maintain FDA approval of YUTREPIA may be impacted by litigation commenced by United Therapeutics in which it is seeking an injunction to have the approval of YUTREPIA withdrawn as described further in Item 3 Legal Proceedings.

The approval for YUTREPIA was based in part upon the results of our pivotal, open-label Phase 3 clinical trial, Investigation of the Safety and Pharmacology of Dry Powder Inhalation of Treprostinil (“INSPIRE”). The primary objective of the INSPIRE study was to evaluate the long-term safety of YUTREPIA with a primary endpoint to assess safety and tolerability through Month 2. The study enrolled patients who have either (a) been under stable treatment with Tyvaso (nebulizer-delivered treprostinil) for at least three months and transitioned to YUTREPIA under the protocol (“Transition patients”), or (b) patients who had been under stable treatment with no more than two non-prostacyclin oral PAH therapies for at least three months and then had their treatment regimen supplemented with YUTREPIA under the protocol (“Prostacyclin Naïve patients”). Of the 121 patients enrolled in the study, 55 were Transition patients and 66 were Prostacyclin Naïve patients. Transition patients started at a dose comparable to their prior nebulized treprostinil dose and were titrated to higher doses as warranted by their clinical disease. Prostacyclin Naïve patients started on a dose of 26.5 mcg of YUTREPIA, with most (>80%) titrating to a 79.5 mcg dose or higher within the first two months of treatment.

YUTREPIA was observed to be well-tolerated and treatment-emergent adverse events (“TEAEs”) were mostly mild to moderate in nature at Month 2 up to doses of 159 mcg, the highest dose studied for the primary endpoint. We continued to treat patients who chose to remain on YUTREPIA beyond the Month 2 timepoint. At the completion of the INSPIRE study, the patient with the longest duration of treatment had been on YUTREPIA therapy for 18 months and the highest dosing reached in the INSPIRE study was 212 mcg of treprostinil given four times per day. Patients from INSPIRE had the option of rolling into the LTI-302 extension study to remain on treatment. Patients in LTI-302 continued to titrate doses upwards as needed with no observed maximum tolerated dose and the highest dose being 291.5 mcg at the time the LTI-302 extension study concluded in December 2025.

The YUTREPIA approval was also based in part on results from pharmacokinetic (“PK”) studies in healthy volunteers indicating that the single-capsule dose of 79.5 mcg YUTREPIA provides comparable PK with 9 bps of Tyvaso (54 mcg). For reference, the target dose of Tyvaso is 9 to 12 bps, 4 times daily. Clinical results from the PK, pivotal and extension studies of YUTREPIA have been presented at various international scientific meetings such as the American Thoracic

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Society (“ATS”), International Society of Heart Lung Transplantation (“ISHLT”), Pulmonary Vascular Research Institute (“PVRI”), American College of Chest Physicians (“ACCP”) starting in 2019.

In 2024, we initiated an open-label, multi-cohort study to evaluate the safety and tolerability of YUTREPIA in subjects who have WHO Group 1 and 3 pulmonary hypertension. Entitled Open-Label ProSpective MultiCENTer Study to Evaluate Safety and Tolerability of Dry Powder Inhaled Treprostinil in PH, the study is abbreviated as ASCENT and listed as by ClinicalTrials.gov ID NCT06129240.

Cohort A in ASCENT enrolled 54 subjects with PH-ILD and will be evaluated for up to 52 weeks. Exploratory objectives of the study are to assess the effects of YUTREPIA on exercise capacity, functional class, relevant biomarkers, and imaging assessments. Interim analysis has been collected and presented at medical conferences, with the most recent being Pulmonary Vascular Research Institute 2026 Annual Congress in January 2026. After 24 weeks of treatment, inhaled YUTREPIA was well tolerated in patients with PH-ILD with median dose of YUTREPIA increasing over time from 132.5 mcg, 159 mcg, and 185.5 mcg QID at week 8, 16, and 24, respectively. The highest dose achieved was 424 mcg QID (comparable to ≥48 breaths of Tyvaso). During this period, the most common treatment-related TEAEs were cough (48.1%) and headache (18.5%). No treatment-related serious adverse events (SAEs) were observed. No patient discontinued the study drug due to cough, though 15 (27.8%) patients discontinued for reason unrelated to drug. Improvements in exercise capacity were observed at week 24, with a median change from baseline of +41.0 meters in six-minute walk distance and 40.5% of patients improving by 50 meters or more.

In the future, we may conduct additional studies, including studies in pediatric patients as well as transitions to, or combinations with, YUTREPIA and other approved treatments. Studies currently being planned include:

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Treprostinil Injection, a Generic Version of Remodulin

Remodulin is treprostinil administered through continuous intravenous and subcutaneous infusion, as approved by the FDA in 2002 and 2004, and marketed by United Therapeutics. Patients must use external pumps manufactured by third parties to deliver Remodulin. Smiths Medical ASD, Inc. (“Smiths Medical”) manufactured the pumps used by most patients in the United States to administer Remodulin, including the CADD-MS 3 infusion pump used to deliver subcutaneous Remodulin, and the CADD-Legacy pump to deliver intravenous Remodulin. An estimated 3,000 patients are treated annually with parenteral, infused treprostinil split between the two routes of administration.

In August 2018, Sandoz partnered with Liquidia PAH (then known as RareGen) on an exclusive basis to market and commercialize its generic Treprostinil Injection, which was subsequently launched as the first-to-file, fully-substitutable generic treprostinil for parenteral administration in March 2019. Liquidia PAH promotes the appropriate use of Treprostinil Injection for the treatment of PAH in the United States and works jointly with Sandoz on commercial strategy for the product. Sandoz retains all other rights in and to Treprostinil Injection. As the ANDA holder for Treprostinil Injection, Sandoz maintains responsibility for compliance with FDA regulatory and healthcare laws including any regulatory communications with the FDA or any other regulatory authorities with respect to Treprostinil Injection. In consideration for Liquidia PAH conducting certain responsibilities associated with the commercialization of Treprostinil Injection, Liquidia PAH receives a portion of the net profits generated from the sales of the product.

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Treprostinil Injection contains the same active ingredient, same strength, same dosage forms and same inactive ingredient amounts as Remodulin, and at the same service and support, but at a lower price. The treprostinil is supplied in 20 mL multi-dose vials in four strengths — containing 20 mg, 50 mg, 100 mg, or 200 mg (1 mg/mL, 2.5 mg/mL, 5 mg/mL or 10 mg/mL) of treprostinil, respectively. Treprostinil Injection is available for intravenous and subcutaneous administration at the same specialty pharmacies that dispense the brand name medicine.

When first launched in April 2019, Treprostinil Injection was only available for intravenous administration. The cartridges required to operate the CADD-MS 3 infusion pump for subcutaneous administration were not available to patients using Treprostinil Injection due to restrictions imposed by other companies. In May 2021, Liquidia PAH’s manufacturing partner, Chengdu Shifeng Medical Technologies LTD (“Chengdu”) began selling the RG 3ml Medication Cartridge, which now may be used to supply Treprostinil Injection to PAH patients with the CADD-MS 3 infusion pump manufactured by Smiths Medical.

Smiths Medical no longer manufactures or supports the CADD-MS 3 infusion pump. We have also from time to time experienced shortages of critical components of the CADD-MS 3 infusion pump that has caused the number of CADD-MS 3 infusion pumps available for the subcutaneous administration of Treprostinil Injection to be limited. Although we believe that the number of available CADD-MS 3 infusion pumps will be sufficient to serve existing patients using Treprostinil Injection through at least the end of 2026, it is possible that the availability of CADD-MS 3 infusion pumps could end earlier. Due to this limitation in the availability of pumps, specialty pharmacies are limiting the number of patients that they place on subcutaneous Treprostinil Injection therapy in order to ensure that patients placed on subcutaneous administration of Treprostinil Injection will not have to discontinue such treatment due to the unavailability of CADD-MS infusion pumps. Until we and/or Sandoz are able to obtain a pump to replace the CADD-MS 3 infusion pump, if ever, the number of patients that can receive subcutaneous administration of Treprostinil Injection will continue to be constrained, which would continue to adversely affect sales of Treprostinil Injection.

We are supporting efforts to identify and develop a subcutaneous pump option for infusion of Treprostinil Injection in order to maintain the availability of subcutaneous administration of Treprostinil Injection. However, a 510(k) clearance application for any such pump option has not yet been submitted and it is currently uncertain when, if ever, such a 510(k) clearance application will be submitted with respect to any pump option.

Separately, Smiths Medical has announced that it will discontinue support of the CADD Legacy pump, which is used to administer Treprostinil Injection intravenously, starting in 2028. Smiths Medical’s CADD-Solis infusion pump has been identified as a replacement for the CADD Legacy pump, and patients are using the CADD-Solis pump in anticipation of the discontinuation of the CADD Legacy pump.

L606

In June 2023, we entered into the Pharmosa License Agreement (as defined below) pursuant to which we were granted an exclusive license in North America to develop and commercialize L606, an inhaled, sustained-release liposomal formulation of treprostinil currently being evaluated in a clinical trial for the treatment of PAH and PH-ILD. In October 2024, we and Pharmosa entered into the First Amendment (as defined below) to expand our licensed territory to include key markets in Europe, Japan and elsewhere, in addition to licensing proprietary nebulizers controlled by Pharmosa. In October 2025, we entered into the Vectura License Agreement (as defined below) pursuant to which we were granted a license to use certain nebulizers developed by Vectura to administer L606.

L606 is a complement to our pipeline and furthers our mission to provide innovative treatment options that improve the lives of patients with improved product profiles.

L606 offers potential substantial benefits to patients with less frequent dosing than current inhaled products, improved tolerability with lower peak exposures and rapid delivery with a next-generation nebulizer. We believe L606 may provide best-in-class treprostinil exposure over a 24-hour period, including during sleeping hours, which could translate to improved efficacy, tolerability, and patient outcomes. Liposomes as a pulmonary drug delivery system have been reported to enhance the therapeutic benefits of drugs and to reduce the potential for systemic adverse effects. The L606 suspension uses Pharmosa’s proprietary liposomal formulation to encapsulate treprostinil, which can be released slowly

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in a controlled manner/rate into the lung. This control enables modulation of drug release to achieve drug exposure over an extended period of time and reduces local irritation in the respiratory tract.

In our clinical studies, we plan to administer L606 with the Vectura mesh-vibrating nebulizer. The L606 formulation inhalation system consists of an electronic, lightweight, and virtually silent mesh-vibrating nebulizer which can deliver a dose in less than 2-minutes using breath-actuated technology. The vibrating mesh technology generates fine-particle aerosols of the L606 formulation. Pharmosa has demonstrated clinically that L606 can be used with devices supplied by different manufacturers, providing us the option to improve the patient device experience without changing the intended dose administered.

The FDA confirmed in meetings with Pharmosa, and subsequently with Liquidia in December 2023, that the registration requirements for L606 to treat PAH and PH-ILD, if submitted through the 505(b)(2) registration pathway, should include clinical data that provides (i) comparable bioavailability to nebulized Tyvaso in a Phase 1 study of health volunteers, (ii) short-term and long-term safety data from an open-label study in PAH and PH-ILD patients, and (iii) demonstrated efficacy from a single Phase 3 placebo-controlled efficacy trial in PH-ILD patients. Liquidia has also met with representatives in the European Medicines Agency (“EMA”) to solicit input in support of the global Phase 3 study which will include PH-ILD patients in the European Union.

Comparable bioavailability was established in a Phase 1, randomized, 2-part study that was conducted by Pharmosa at a clinical research unit in the U.S. The systemic exposures of a single dose of L606, 51 mcg, and, Tyvaso, 54 mcg, were compared. L606 resulted in a similar systemic exposure (“AUCinf”) compared with the comparable dose of Tyvaso, with a significantly reduced peak plasma concentration (“Cmax”), approximately 7.3-fold lower for L606 than for Tyvaso. L606 demonstrated extended plasma concentrations up to 12 hours after a single dose, supporting a reduction in dosing frequency to twice daily, or every 12 hours. Peak and total exposure of treprostinil increased with increasing dose.

We are currently conducting in the United States an open-label study to assess the safety of L606 in patients with PAH and patients with PH-ILD transitioning from Tyvaso (nebulizer or dry-powder inhaler) or patients with PAH naïve to prostacyclins. The open-label study was fully enrolled during 2024 with 28 patients and includes some patients who have been successfully treated with L606 for longer than one year. L606 continues to be well tolerated up to our maximum dose of 318 mcg twice-daily, which is approximately 2 to 2.5-fold higher than comparable target dosing of Tyvaso (9 to 12 bps) four times daily.

We have initiated a global placebo-controlled efficacy study in PH-ILD. The clinical design will include approximately 340 patients across more than 100 sites in at least 20 countries. The primary outcome measure will be six-minute walk distance.

We intend to pursue additional indications for L606 that align with previous studies where inhaled treprostinil has shown a patient benefit. Specifically, we believe that any disease being studied with YUTREPIA would be applicable for L606.

PRINT Technology

Our proprietary PRINT particle engineering technology allows us to engineer and manufacture highly uniform drug particles with precise control over the size, three-dimensional geometric shape and chemical composition of the particles. By controlling these physical and chemical parameters of particles, PRINT enables us to engineer desirable pharmacological benefits into product candidates, including prolonged duration of drug release, increased drug loading, more convenient routes of administration, the ability to create novel combination products, enhanced storage and stability and the potential to reduce adverse side effects. We believe that our PRINT technology can be applied to a wide range of therapeutic areas, molecule types, routes of administration and novel or generic products. Our manufacturing equipment and materials used in the production of our drug particles are proprietary and protected by our patent portfolio and trade secret know-how.

YUTREPIA leverages PRINT technology to produce dry-powder drug particles that enhance deep-lung delivery. YUTREPIA drug particles are uniform in size (~1μm) and shape having been engineered for enhanced aerosolization

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and deep-lung deposition. In vitro studies suggest that the uniformity of size and shape allow our inhaled particles to target delivery into the lungs with less deposition in the upper airways. The dry-powder formulation aerosolizes into free-flowing particles upon inhalation, allowing for the use of a low-effort inhaler. The figures below depict YUTREPIA, with the figure on the left showing size and shape consistency among particles and the figure on the right showing their trefoil shape:

Development, Regulatory and Commercial Strategy

We intend to develop and commercialize a pipeline of drugs by applying our expertise in the development of cardio-pulmonary medicines. To date, our pipeline has focused on the development of improved and differentiated drug products containing FDA-approved active pharmaceutical ingredients (“APIs”) with established efficacy and safety profiles, which we believe are eligible for the 505(b)(2) regulatory pathway to seek marketing approval in the United States. If our product candidates receive marketing approval, we plan to commercialize them in the United States either by ourselves or through partnership or licensing arrangements with other pharmaceutical companies. Outside of the United States, we may pursue regulatory approval and commercialization of our product candidates in collaboration with pharmaceutical companies with regional expertise.

We intend to manufacture our product candidates using a combination of in-house capabilities and external contract manufacturing organizations (“CMOs”), depending on the program requirements. For example, the dry powder formulation of YUTREPIA is manufactured internally using PRINT technology and CMOs produce, package and distribute YUTREPIA finished goods on a commercial scale. Conversely, L606 is currently planned to be manufactured exclusively by CMOs using the proprietary formulation methods provided by Pharmosa.

We intend to focus our commercial efforts initially on the U.S. market in the treatment of PAH and PH-ILD. We currently employ a targeted sales force, calling on physicians involved in the treatment of PAH and PH-ILD in the United States, as well as key stakeholders involved in the distribution and reimbursement of therapies for PAH and PH-ILD. Strategically, we believe that our existing commercial presence in the field will enable an efficient launch of YUTREPIA if and when we obtain final approval, leveraging existing relationships and further validating our reputation as a company committed to supporting PAH and PH-ILD patients. Our commercial efforts focus on the highly concentrated target market of PAH and PH-ILD centers of excellence and high prescribers of approved therapies. Our physician call points within these sites of care will include cardiologists, pulmonologists and their supporting staff. We believe that we can effectively commercialize YUTREPIA with our specialty field team and other support functions, like medical science liaisons and reimbursement specialists to support the proper conveying of scientific, medical, and healthcare economic information regarding our products.

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Manufacturing and Supply

We operate from a 45,000 square foot facility in Morrisville, North Carolina in which we design, formulate and manufacture engineered drug particles using PRINT particle fabrication lines as well as supportive activity including research and development, analytical development, quality control and production of mold templates that enable our production processes. Our three operational PRINT particle fabrication lines are located within class ISO7 clean rooms that operate under applicable ISO and current good manufacturing practices (“cGMP”) air quality and environmental requirements. Our current operational fabrication lines are scaled and capable of producing the necessary materials to support our clinical trials and current commercial demand for YUTREPIA.

In June 2025, we entered into a lease for a new 70,131 square foot facility in Morrisville, North Carolina. We are currently in the process of building out the new facility, which, when complete, will be used for additional particle fabrication lines as well as other supportive activities.

We utilize CMOs to finish production and package our drug product for clinical and commercial use.

We depend on third-party suppliers and CMOs for commercial inventory and clinical supplies of YUTREPIA, including active pharmaceutical ingredients which are used in YUTREPIA. For example, we currently rely on a sole supplier, LGM Pharma, LLC (“LGM”), for treprostinil, the active pharmaceutical ingredient of YUTREPIA, and we currently rely on a sole supplier, Plastiape S.p.A (“Plastiape”), for RS00 Model DPI, the device used to administer YUTREPIA. We also rely on a sole supplier, Lonza Tampa LLC (“Lonza”), for encapsulation and packaging services for YUTREPIA. We expect to continue to rely on third-party CMOs to manufacture, package and distribute some or all of our supply of YUTREPIA on a commercial scale.

Supply of Treprostinil Injection is managed directly by our partner Sandoz, who retains the ANDA, manages inventory and records gross revenue on product sales. Sandoz is either the manufacturer or contracted party for the entire supply chain. We collaborate with Sandoz on a regular basis to plan appropriate inventory production and management based on the demand for Treprostinil Injection and observations in the field. Additionally, we have contracted with our manufacturing partner Chengdu to supply the RG 3mL Medication Cartridge for use with CADD-MS 3 infusion pumps and enable subcutaneous administration of Treprostinil Injection. The pumps used to administer Treprostinil Injection are currently all manufactured by ICU Medical, with whom we have no contractual relationship.

L606 is manufactured exclusively by CMOs using the proprietary liposomal formulation methods provided by Pharmosa. Under the License Agreement, Pharmosa will manufacture clinical and commercial supplies of L606 and support Liquidia in establishing a redundant global supply chain. The proprietary nebulizer used to administer L606 will be manufactured by Vectura Limited (“Vectura”).

Our Collaboration and Licensing Agreements

Pharmosa License Agreement

In June 2023, we entered into a License Agreement with Pharmosa pursuant to which we were granted an exclusive license in North America to develop and commercialize L606, an inhaled, sustained-release formulation of treprostinil currently being evaluated in a clinical trial for the treatment of PAH and PH-ILD, and a non-exclusive license for the manufacture, development and use (but not commercialization) of such licensed product in most countries outside North America (the “Pharmosa License Agreement”). On October 2, 2024, we and Pharmosa entered into a First Amendment to the Pharmosa License Agreement (the “First Amendment”) which, among other things, expands our licensed territory beyond North America to include key markets in Europe, Japan and elsewhere.

Concurrently with the execution of the First Amendment, we and Pharmosa also entered into a Device License Agreement (the “Device License Agreement”). Pursuant to the terms of the Device License Agreement, Pharmosa will provide (i) an exclusive license to Liquidia Technologies for the right to develop, manufacture, use and commercialize Pharmosa’s next-generation smart-technology nebulizers (the “Device”) for use with L606 in most countries (subject to

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certain exceptions) (the “Territory”) and (ii) a non-exclusive license to Liquidia Technologies for the right to develop, manufacture and use (but not commercialize) the Device outside of the Territory.

Under the terms of the Pharmosa License Agreement, as amended, we will be responsible for development, regulatory and commercial activities of L606 in the Territory. Pharmosa will manufacture clinical and commercial supplies of the liposomal formulation through its global supply chain and support us in establishing a redundant global supply chain. In consideration for these exclusive rights, we paid Pharmosa an upfront license fee of $10 million and paid an additional $3.5 million upfront license fee in October 2024 in connection with the rights granted in the First Amendment and the Device License Agreement. In addition to the upfront fees, we will pay Pharmosa potential development milestone payments tied to clinical development and approvals in PAH and/or PH-ILD of up to $37.75 million, potential sales milestones of up to $185 million in North America and $150 million outside North American and two tiers of low, double-digit royalties on all net sales of L606. Pharmosa will also receive a $10 million milestone payment for each additional indication approved by the FDA after PAH and PH-ILD and each additional product approved by the FDA under the license, a $2 million milestone payment for each additional indication approved by the EMA after PAH and PH-ILD, and a $0.5 million milestone payment for each additional indication approved by Japan’s Pharmaceuticals and Medical Devices Agency (the “PMDA”) after PAH and PH-ILD. As of December 31, 2025, no development milestones have been achieved under the Pharmosa License Agreement. We also retain the first right to negotiate for development and commercialization of L606 in other territories should Pharmosa seek a partner, subject to satisfaction of certain conditions as set forth in the Pharmosa License Agreement.

Vectura License Agreement

In October 2025, we entered into an exclusive licensing agreement (the “Vectura License Agreement”) with Vectura, which provided for, among other things, (i) the exclusive right for Liquidia Technologies to develop, manufacture and commercialize for use in the United States products containing treprostinil, including L606, administered via certain Vectura nebulizer devices for treatment in the field of hypertension and interstitial lung diseases, including PAH and PH-ILD and (ii) that Vectura shall be responsible for manufacturing and supplying Liquidia Technologies with clinical and commercial supplies of the devices.

Under the License Agreement, we are required to pay to Vectura (i) an upfront payment of $2 million in connection with the execution of the Vectura License Agreement, (ii) certain development milestone payments of up to $12 million upon achievement of certain development milestones; (iii) certain sales milestone payments of up to $92.5 million tied to commercial sales in the territory and (iv) royalty payments with royalty rates ranging in the middle single digits tied to commercial sales in the territory. The Vectura License Agreement also provides us with rights of first negotiation to add additional territories and indications during the term thereof as set out in the Vectura License Agreement.

The Vectura License Agreement will remain in effect on a country-by-country and product-by-product basis until the expiration of the applicable royalty term (as set forth in the Vectura License Agreement) in such country with respect to such product, at which time the Vectura License Agreement shall expire in respect of such country and product. The Vectura License Agreement may be terminated (i) by mutual agreement, (ii) by either party for a material breach by the other party, subject to notice and cure periods, (iii) by either party in the event of a bankruptcy event (as set forth in the Vectura License Agreement) of the other party, (iv) by us in the event we (x) discontinue the L606 program, (y) determine regulatory, scientific or technical infeasibility or (z) terminate our related supply or development agreements, and (v) by Vectura for (x) our failure to use commercially reasonable efforts to develop a product under the Vectura License Agreement, (y) upon receipt of notice that we will discontinue the L606 program or (z) in the event that we initiate a challenge to Vectura’s patent rights being licensed under the Vectura License Agreement.

Sandoz Promotion Agreement

Liquidia PAH entered into a Promotion Agreement (the “Promotion Agreement”) with Sandoz on August 1, 2018, as amended on May 8, 2020, September 4, 2020, November 18, 2022, and March 10, 2023, which engaged Liquidia PAH on an exclusive basis to promote the appropriate use of Sandoz’s Treprostinil Injection for the treatment of PAH in the United States, including its commonwealths, territories, possessions and military bases. Liquidia PAH works jointly with Sandoz on commercial strategy for Treprostinil Injection and on identifying, manufacturing and developing medical

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devices, including pumps and cartridges, that may be used to administer Treprostinil Injection. As the ANDA holder for Treprostinil Injection, Sandoz retains all rights to Treprostinil Injection and maintains responsibility for compliance with FDA regulatory and healthcare laws including any regulatory communications with the FDA or any other regulatory authorities.

Under the Promotion Agreement, Sandoz retains responsibility for: the specifications, manufacture and supply, distribution and future development of treprostinil; regulatory submission and interactions with the FDA pertaining to treprostinil, including maintaining all necessary regulatory approvals; reporting to the FDA or other regulatory authorities on matters relating to manufacturing, sale or promotion, such as any safety events involving treprostinil; internally reviewing and, as it determines appropriate, approving promotional materials developed by Liquidia PAH, and making submissions to the FDA’s Office of Prescription Drug Promotion; handling safety activities including adverse event reporting; and initiating and managing any recalls of treprostinil.

Liquidia PAH’s activities and obligations related to the Promotion Agreement include: promotional and non-promotional activities, including sales and marketing activities for treprostinil, and engagement of healthcare professionals for advisory boards; developing, with prior written approval from Sandoz, marketing and educational materials consistent with FDA approved labeling and applicable laws; notifying Sandoz of notices from governmental authorities about adverse event reports or regulatory inquiries related to the safety of treprostinil, product complaints or alleged defects, and unsolicited requests for off-label medical information; providing certain data and information to Sandoz in order to fulfill its transparency and reporting obligations under the Physician Payment Sunshine Act; complying with applicable laws relevant to the activities conducted under the Promotion Agreement; establishing a compliance program and mechanism for disclosure of any violations of Liquidia PAH policies and procedures and submission of an annual report and certification to Sandoz of its compliance activities; and managing, with oversight and participation from Sandoz, negotiations and arrangements for managed care activities.

Liquidia PAH paid Sandoz an initial payment of $10 million on August 1, 2018 and, upon the successful quality release by Sandoz of 9,000 units of Treprostinil Injection on August 3, 2018, Liquidia PAH paid Sandoz an additional $10 million as further consideration for the right to conduct the activities as contemplated in the Promotion Agreement and to receive a portion of the “Net Profits” (as defined in the Promotion Agreement). The portion of Net Profits are allocated to Liquidia PAH currently through December 31, 2028 is as follows: (i) for that portion of aggregate Net Profits less than or equal to $500 million, Liquidia PAH shall receive 50% of all such Net Profits; and (ii) for that portion of aggregate Net Profits greater than $500 million, Liquidia PAH shall receive 75% of all such Net Profits. After December 31, 2028, the portion of Net Profits allocated to Liquidia PAH shall be as follows: (i) if aggregate Net Profits as of December 31, 2028 were less than $500 million, Liquidia PAH shall receive 50% of all Net Profits; and (ii) if aggregate Net Profits as of December 31, 2028 were greater than or equal to $500 million, Liquidia PAH shall receive 75% of all Net Profits.

The Promotion Agreement expires December 31, 2032, subject to certain renewal periods. Liquidia PAH and Sandoz may terminate the Promotion Agreement for cause upon a number of customary events, such as a material breach of the Promotion Agreement that remains uncured, complete withdrawal of marketing approval of Treprostinil Injection or upon the filing or institution of bankruptcy, reorganization, liquidation or receivership proceedings with respect to the other party. Further, either party may terminate the Promotion Agreement upon written notice to the other party at any time after the current term in the event Sandoz is then procuring 100% of its supply of Treprostinil Injection from a single third party upon (a) expiration of the supply agreement with such third party and (b) Sandoz’s failure, after exercise of commercially reasonable efforts, to secure continued supply of Treprostinil Injection from such third party or other third parties within 12 months of the termination of such supply agreement. Liquidia PAH and Sandoz also each have a right to terminate the Promotion Agreement on not more than 90 days’ written notice in the event that Net Profits in the last calendar year are less than $5 million.

Sandoz may terminate the Promotion Agreement on not more than 90 days’ written notice after the conclusion of any full 12-month calendar year in the event that Net Profits in such calendar year are less than or equal to 10% of the net sales in such calendar year; provided, however, that Sandoz may not terminate the Promotion Agreement in such instance if both (x) Net Profits or the profit margin were adversely affected in such calendar year by any temporary event or circumstance and (z) the joint steering committee makes a determination that such profit margin deficiency is not

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likely to continue in the subsequent calendar year. Sandoz may also terminate the Promotion Agreement upon a change of control of Liquidia PAH.

Liquidia PAH may terminate the Promotion Agreement on not more than 90 days’ written notice after the conclusion of any full 12-month calendar year in the event that Liquidia PAH’s share of the Net Profits in such calendar year are less than or equal to Liquidia PAH’s operating expenses relating to Treprostinil Injection for such calendar year; provided, however, that Liquidia PAH may not terminate the Promotion Agreement in such instance if both (x) Net Profits or its operating expenses relating to Treprostinil Injection were adversely affected in such calendar year by a temporary event or circumstance and (z) the joint steering committee makes a determination that Liquidia PAH’s share of the Net Profits is not likely to continue to be less than its operating expenses relating to Treprostinil Injection in the subsequent calendar year.

The University of North Carolina at Chapel Hill

In December 2008, we entered into the Amended and Restated License Agreement with The University of North Carolina at Chapel Hill (“UNC”) for the use of certain patent rights and technology relating to our PRINT technology (the “UNC License”). Under the terms of the UNC License, we have an exclusive license to such patent rights and technology for our drug products. The UNC License grants us the right to grant sublicenses to the technology as well as control the litigation of any infringement claim instituted by or against us in respect of the licensed patent rights. We are also responsible for all expenses associated with the prosecution and maintenance of the patents and patent applications. Such filings and prosecution will be carried out by UNC and in UNC’s name but under our control.

Under the UNC License, we are required to pay UNC royalties equal to a low single digit percentage of all net sales of our drug products whose manufacture, use or sale includes any use of the technology or patent rights covered by the UNC License, as well as tiered royalty percentages ranging in the low single digits of sales by our sublicensees for any product covered by rights under a sublicense agreement granted pursuant to the UNC License. Under the UNC License, we are also required to pay UNC certain fees other than royalties that we collect and are attributable to UNC sublicensed intellectual property. Effective November 2017, we satisfied all substantive milestones associated with our UNC License other than semi-annual and annual reporting-based milestones that continue through the term of the UNC License. The UNC License expires (i) on the expiration of the last to expire patent included in the patent rights or (ii) if no patents mature from such patent rights, in December 2028.

We have the right to terminate the UNC License upon a specified period of prior written notice. UNC may terminate the UNC License in certain circumstances, including if we fail to pay royalty or other payments on time or if we fail to sublicense in accordance with the terms of the UNC License. Upon termination of the UNC License, we must pay any royalty obligations due upon termination.

Alcon Inc.

We have exclusively licensed our PRINT technology to Aerie Pharmaceuticals, Inc. (“Aerie”) for broad usage in the design and commercialization of small molecule and biologic ophthalmic therapies. In November 2022, Alcon Inc. (“Alcon”) completed its acquisition of Aerie and, as a result, retains Aerie’s exclusive license to the use of our PRINT technology for ophthalmic therapies.

GlaxoSmithKline

In March 2023, we and GSK plc (“GSK”) entered into a Research License Agreement (the “GSK License Agreement”) which superseded and replaced our prior agreements with GSK. Pursuant to the GSK License Agreement, the Company has granted to GSK a non-exclusive, non-sublicensable (except to affiliates), royalty free license to use our PRINT technology for the sole purpose of conducting preclinical research and preclinical development of inhaled formulations of GSK’s Molecules in the Field and in the Territory (capitalized terms are as defined in the GSK License Agreement). The Company and GSK will each own and retain all rights, title, and interest in and to all inventions, discoveries and other subject matter (including Know-How (as defined in the GSK License Agreement)) together with all intellectual

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property rights therein which are owned or controlled by such party as of the date of the GSK License Agreement or which are invented or acquired by or on behalf of such party independent of the GSK License Agreement.

Liquidia is permitted to continuously use its PRINT technology for any inhaled formulation other than certain identified GSK proprietary molecules, pursuant to the GSK License Agreement. Under the terms of the GSK License Agreement, GSK will be required to seek an expanded license before it may use PRINT for clinical or commercial purposes.

Unless earlier terminated, the GSK License Agreement will continue in effect until the later of (i) the expiration of the last-to-expire Valid Claim (as defined in the GSK License Agreement) included within the Liquidia Technology (as defined in the GSK License Agreement) and (ii) all Arising PRINT Improvements (as defined in the GSK License Agreement) and Liquidia Know-How (as defined in the GSK License Agreement) are in the public domain. GSK may terminate the Agreement upon at least thirty days’ prior written notice to the Company. The GSK License Agreement may also be terminated by either party for a material breach by the other party, subject to notice and cure provisions, or in the event of the other party’s insolvency. In the GSK License Agreement, each party made customary representations and warranties and agreed to customary covenants, including, without limitation, with respect to indemnification, for transactions of this type.

Intellectual Property

The proprietary nature and protection of our product candidates, their methods of use and our platform technology that enables our product candidates are an important part of our business strategy of rapidly developing and commercializing new medicines that address areas of significant unmet medical needs.

Our policy is to seek patent protection of our proprietary product candidates and technology by filing U.S., international and certain foreign patent applications covering certain of our proprietary technology, inventions, improvements and product candidates that are important to the growth and protection of our business. We also rely on a combination of trade secrets, know-how, trademarks and contractual restrictions to protect aspects of our business that are not amenable to patent protection or where we do not consider patent protection to be adequate or applicable.

Our success depends, in part, on our ability to obtain and maintain patent and other protection for our product candidates, enabling technology, inventions and know-how and our ability to defend and enforce these patents, preserve the proprietary nature of our trade secrets and trademarks and operate our business without infringing valid and enforceable patent and other proprietary rights of third parties. Where possible, we pursue both composition-of-matter patents and method-of-use patents for our product candidates. We also have patents covering our proprietary PRINT micro- and nano-particle fabrication technology.

We are the owner or exclusive licensee of patents and applications relating to our proprietary technology platform and our product candidates and are pursuing additional patent protection for these and for our other product candidates and technology developments.

As of December 31, 2025, we had a total of 151 patents and pending patent applications in our patent portfolio which protect our PRINT technology and drug products in development. As of December 31, 2025, we were the sole owner of 21 patents in the United States and 43 patents in foreign jurisdictions, as well as 13 additional pending patent applications, including provisional patent applications, in the United States, Europe, Japan and other jurisdictions. In addition to the patents and patent applications owned solely by us, our patent portfolio as of December 31, 2025 also included 51 patents and 23 patent applications licensed from third parties. As of December 31, 2025, we had an exclusive, worldwide license from UNC to 11 U.S. patents and seven foreign patents. Three of the patents licensed from UNC are jointly owned by us. Also, as of December 31, 2025, we had an exclusive license in the territory from Pharmosa to five U.S. patents and 20 foreign patents, as well as 23 additional patent applications in the United States or selected foreign jurisdictions. In addition, as of December 31, 2025, we had a license in the territory from Vectura to 8 U.S. patents. As of December 31, 2025, YUTREPIA was specifically protected by 16 issued patents in the United States, the longest-lived of which will expire in 2037.

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We hold multiple U.S. trademark registrations and have numerous pending trademark applications. Issuance of a federally registered trademark creates a rebuttable presumption of ownership of the mark; however, it is subject to challenge by others claiming first use in the mark in some or all the areas in which it is used. Federally registered trademarks have a perpetual life so long as they are maintained and renewed on a timely basis and used properly as trademarks, subject to the rights of third parties to seek cancellation of the trademarks if they claim priority or confusion of usage. We believe our patents and trademarks are valuable and would provide us certain benefits in marketing our products.

Competition

The pharmaceutical industry is intensely competitive, subject to rapid and significant technological change and places emphasis on the value of proprietary products. While we believe that our technologies and experience provide us with a competitive advantage, our competitors include organizations such as major multinational pharmaceutical companies, established biotechnology companies, biopharmaceutical companies and generic drug companies. Many of our competitors have greater financial and other resources than we have, such as more commercial resources, larger research and development staffs and more extensive marketing and manufacturing organizations. As a result, these companies may obtain marketing approval more rapidly than we are able and may be more effective in selling and marketing their products. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaboration arrangements with large, established companies.

Any product candidates that we successfully develop and commercialize will compete with existing therapies and new therapies that may become available in the future. Our competitors may succeed in developing, acquiring or licensing, on an exclusive basis, technologies and drug products that are more effective or less costly than products that we are currently developing or that we may develop, which could render our products obsolete and non-competitive. We expect any products that we develop and commercialize to compete on the basis of, among other things, efficacy, safety, convenience of administration and delivery, price and the availability of reimbursement from government and other third-party payors. We also expect to face competition in our efforts to recruit and retain qualified personnel, establish clinical trial sites and secure patient enrollment in our clinical trials, and identify appropriate collaborators to help commercialize any approved products in our target commercial markets.

Our product, YUTREPIA, and our product candidate, L606, will compete for market share to treat patients diagnosed with PAH, PH-ILD, or any other indications for which we may receive marketing approval in the future. Treprostinil Injection, which we commercialize with Sandoz, competes only in the PAH market. Each disease has different competitive forces as described below.

Competition in PAH

Our products and development programs directed toward the treatment of PAH compete with several approved classes of drugs in clinically validated signaling pathways. These drugs may be used alone or in combination and may include branded or generic formulations or molecules with the following mechanisms of action: antagonists of endothelin receptors (“ERAs”) such as bosentan, macitentan and ambrisentan; inhibitors of the enzyme Phosphodiesterase-5 (“PDE5”) in the nitric oxide pathway such as tadalafil and sildenafil; soluble guanylate cyclase (“sGC”) stimulators such as riociguat; inhibitors of activin signaling such as sotatercept; and agonists of the prostacyclin pathway that either bind to the IP receptor, such as selexipag, or are analogs of endogenous prostacyclin, such as treprostinil, iloprost and epoprostenol. Most combination treatments are administered as separate doses, but some patients may use a single-tablet that includes macitentan and tadalafil. The branded forms of these molecules are commercialized by large pharmaceutical companies such as Johnson & Johnson under the name Janssen/Actelion, Gilead Sciences, Inc., Bayer Schering Pharma AG, Merck & Company, and United Therapeutics.

In PAH treatment, therapies targeting the prostacyclin pathway are usually added after oral formulations of ERAs, PDE5 inhibitors and/or oral sGCs. Injections of sotatercept, approved in March 2024, are usually added to patient therapy after prostacyclin products, but its clinical use is developing. It is possible that sotatercept may come to be used prior to prostacyclin therapies, which may have an adverse effect on the market potential for YUTREPIA and/or L606.

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Competition with prostacyclin-targeted treatments in PAH

Inhaled prostacyclin products. We expect that our products will face competition from the following inhaled prostacyclin analogs, which may be more tolerable than systemically delivered oral and infused products.

Orally delivered prostacyclin products. Oral products are perceived to be more convenient than inhaled and infused products. Orenitram (treprostinil), dosed three-times daily and sold by United Therapeutics, and Uptravi (selexipag), dosed twice daily and sold by Janssen Pharmaceuticals/Actelion, are both approved to treat PAH.

Infused prostacyclin analogs. Our Treprostinil Injection product to treat PAH faces competition primarily from the continued use of the branded Remodulin sold by United Therapeutics as well as additional generic treprostinil products offered by Teva, Par Pharmaceutical, Dr. Reddy’s and Alembic. Generic drug prices may decline dramatically as competitors seek to secure preferential utilization though the specialty pharmacy and hospital distribution channels in which parenteral prostacyclin products are sold. Other parenteral agents that utilize the prostacyclin pathway include parenteral iloprost and epoprostenol, which are marketed by multiple companies as generic and branded products.

We expect United Therapeutics to continue to defend its leadership position vigorously through, among other actions, life cycle management, marketing agreements with third-party payors, and pharmacy benefits managers. In February 2021, United Therapeutics announced the commercial launch of the Remunity® pump for Remodulin, which uses a small subcutaneous pump for patients starting or on a stable dose of Remodulin and can use prefilled Remodulin cassettes. The Remunity pump also has a water-resistant casing, which may be considered more convenient than the CADD-MS 3 infusion pumps currently used to deliver treprostinil subcutaneously. United Therapeutics also maintains intellectual property that could lead to improved product profiles for a variety of PAH treatments, including using prodrugs of treprostinil to decrease site pain associated with subcutaneous delivery or extend the release profile of treprostinil. Similarly, Corsair Pharma, a former partner of United Therapeutics, is developing a prodrug and transdermal patch intended to provide continuous and consistent blood levels of treprostinil comparable to an infusion pump.

Competition in PH-ILD

Unlike PAH, there is less competition from competing products and mechanisms of action (“MOAs”) to treat PH-ILD patients. Inhaled treprostinil is the only approved treatment and route of delivery. In April 2021, United Therapeutics announced that Tyvaso was approved by FDA as the first and only treatment for patients with PH-ILD. Tyvaso DPI is also indicated to treat PH-ILD. We expect other programs to initiate trials given the very clear unmet needs of this patient group.

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Potential competition from products in development to treat PAH and/or PH-ILD

We also expect continued development by competitors of clinically validated or novel MOAs that may be approved during the period of time that YUTREPIA and our product candidates, if approved, are being commercialized. The approval of some or any of these could change the treatment paradigm and impact the utilization of our products in the prostacyclin class. Specific products in later stage development include:

We are also aware of several other agents in clinical development that are exploring mechanisms of action which, if approved, could impact the standard of care for treating PAH and/or PH-ILD in the United States, including programs from Cereno Scientific, Novartis AG, and Forsee Pharmaceuticals among others.

Human Capital

As of December 31, 2025, we employed 216 employees. We have no collective bargaining agreements with our employees, and we have not experienced any work stoppages. We consider our relations with our employees to be good.

We believe that our future success largely depends upon our continued ability to attract and retain highly skilled employees. We provide our employees with competitive salaries and bonuses, opportunities for equity ownership, development programs that enable continued learning and growth and a robust employment package that promotes well-being across all aspects of their lives, including health care, retirement planning and paid time off.

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Facilities

Our corporate headquarters is located in Morrisville, North Carolina, and consist of approximately 45,000 square feet of space under a lease that expires on December 31, 2031 and includes an option for us to renew the lease for an additional five years through December 31, 2036. The primary use of this location is general office, laboratory, research and development and light manufacturing. In June 2025, we entered into a lease for a second manufacturing and office space in Morrisville, North Carolina that consists of approximately 70,131 square feet of space. The lease expires on November 1, 2036, with the option to extend for two additional periods of five years each with appropriate notice. The lease is not expected to commence until late 2026. We will seek additional space as needed to accommodate our growth.

Corporate Information

We were incorporated in Delaware on June 17, 2020. Our principal executive offices are located at 419 Davis Drive, Suite 100, Morrisville, North Carolina 27560 and our telephone number is (919) 328-4400. Our website is www.liquidia.com. The information on or that can be accessed through our website is not incorporated by reference into this Annual Report on Form 10-K, and you should not consider any such information as part of this Annual Report on Form 10-K or in deciding whether to purchase our common stock. This Annual Report on Form 10-K and all of our filings under the Exchange Act, including copies of annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and any amendments to those reports, are available free of charge through our website on the date we file those materials with, or furnish them to, the U.S. Securities and Exchange Commission (“SEC”). Such filings are also available to the public on the internet at the SEC’s website at www.sec.gov.

Government Regulation

Government authorities in the United States at the federal, state and local level, the European Union, the United Kingdom and in other countries, extensively regulate, among other things, the research, development, testing, manufacture, (including manufacturing changes), quality control, approval, labeling, packaging, storage, record-keeping, promotion, advertising, distribution, marketing, export and import of products such as those we are developing. The processes for obtaining regulatory approvals in the United States and in foreign countries, along with subsequent compliance with applicable statutes and regulations, require the expenditure of substantial time and financial resources.

Government Regulation in the United States

United States Drug Development Process

In the United States, the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (the “FDCA”), the Public Health Service Act (the “PHSA”) and the FDA’s implementing regulations.

Failure to comply with the applicable requirements in the United States at any time during the product development process, approval process or after approval may subject an applicant to administrative or judicial sanctions. These sanctions could include the FDA’s refusal to approve pending applications, withdrawal of an approval, a clinical hold, untitled or warning letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement or civil or criminal penalties. The process required by the FDA before a new drug may be marketed in the United States generally involves the following:

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The testing and approval process requires substantial time, effort and financial resources, and we cannot be certain that any approvals for our product candidates will be granted on a timely basis, if at all.

Once a pharmaceutical product candidate is identified for development, it enters the preclinical testing stage. Preclinical tests include laboratory evaluations of product chemistry, toxicity, formulation and stability, as well as animal studies. When a sponsor wants to proceed to test the product candidate in humans, it must submit an IND in order to conduct clinical trials.

An IND sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data and any available clinical data or literature, to the FDA as part of the IND. The sponsor must also include a protocol detailing, among other things, the objectives of the initial clinical study, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated if the initial clinical study lends itself to an efficacy evaluation. Some preclinical testing may continue even after the IND is submitted. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA raises concerns or questions related to a proposed clinical study and places the study on a clinical hold within that 30-day time period. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical study can begin. Clinical holds also may be imposed by the FDA at any time before or during clinical studies due to safety concerns or non-compliance, and may be imposed on all product candidates within a certain pharmaceutical class. The FDA also can impose partial clinical holds, for example, prohibiting the initiation of clinical studies of a certain duration or for a certain dose.

All clinical studies must be conducted under the supervision of one or more qualified investigators in accordance with GCP regulations. These regulations include the requirement that all research subjects provide informed consent in writing before their participation in any clinical study. Further, IRBs, DSMBs, or ECs must review and approve the plan for any clinical study before it commences at any institution, and the IRBs must conduct continuing review and reapprove the study at least annually. IRBs, DSMBs, or ECs consider, among other things, whether the risks to individuals participating in the clinical study are minimized and are reasonable in relation to anticipated benefits. The IRBs, DSMBs, or ECs also approve the information regarding the clinical study and the consent form that must be provided to each clinical study subject or his or her legal representative and must monitor the clinical study until completed.

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Each new clinical protocol and any amendments to the protocol must be submitted for FDA review, and to the IRBs, DSMBs, or ECs for approval. Protocols detail, among other things, the objectives of the clinical study, dosing procedures, subject selection and exclusion criteria and the parameters to be used to monitor subject safety.

Information about certain clinical trials must be submitted within specific timeframes to the National Institutes of Health (“NIH”) for public dissemination on their ClinicalTrials.gov website.

Human clinical studies are typically conducted in three sequential phases that may overlap or be combined:

Progress reports detailing the results of the clinical studies must be submitted at least annually to the FDA and safety reports must be submitted to the FDA and the investigators for serious and unexpected suspected adverse events. Phase 1, Phase 2 and Phase 3 testing may not be completed successfully within any specified period, if at all. The FDA or the sponsor may suspend or terminate a clinical study at any time on various grounds, including a finding that the research subjects or patients are being exposed to an unacceptable health risk. Similarly, IRBs, DSMBs, or ECs can suspend or terminate approval of a clinical study at its institution if the clinical study is not being conducted in accordance with the requirements of IRBs, DSMBs, or ECs or if the drug has been associated with unexpected serious harm to patients.

There are FDA-imposed limitations on communications about investigational drugs. The FDA prohibits companies from making promotional claims of safety or effectiveness of the drug for a use for which it is under investigation, and from “commercialization” of the drug before it is approved for commercial marketing and distribution, and otherwise regulates communications about products in clinical trials. FDA law prohibits “misbranding” of drugs and establishes related rules and policies on communications about promotional and non-promotional (educational, scientific) communications. Interactions with or communications directed to healthcare professionals (“HCPs”), patients or patient- or disease-advocates or advocacy groups, and payors, are subject to heightened scrutiny by the FDA. Relative to non-promotional communications, for example, there are specific and limited FDA accommodations for non-promotional, truthful and non-misleading sharing of information regarding products in development and off-label uses including dissemination of peer-reviewed reprints, support of independent continuing medical education (“CME”) and healthcare economic discussions with payors. In a competitive environment, a company’s communications about products in development may also be subject to heightened scrutiny.

Concurrent with clinical studies, companies usually complete additional animal studies and must also develop additional information about the chemistry and physical characteristics of the product and finalize a process for manufacturing the product in commercial quantities in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other things, the manufacturer must develop methods for testing the identity, strength, quality and purity of the final product. Additionally, appropriate packaging must be selected and tested, and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration over its shelf life.

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United States Review and Approval Processes

Assuming successful completion of the required clinical testing, the results of product development, preclinical studies and clinical studies, along with descriptions of the manufacturing process, analytical tests conducted on the drug, proposed labeling and other relevant information, are submitted to the FDA as part of an NDA for a new drug, requesting approval to market the product.

The submission of an NDA is subject to the payment of a substantial application user fee although a waiver of such fee may be obtained under certain limited circumstances. For example, the agency will waive the application fee for the first human drug application that a small business or its affiliate submits for review. The sponsor of an approved NDA is also subject to annual program user fees.

In addition, under the Pediatric Research Equity Act of 2003 (“PREA”) an NDA application (or a supplement to an application) for a new active ingredient, new indication, new dosage form, new dosing regimen or new route of administration must contain a Pediatric Assessment. If so, the submission must contain data from pediatric studies that are adequate to assess the safety and effectiveness of the drug for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective, unless the applicant has obtained a waiver or deferral. PREA applies only to products developed for diseases that occur in both adult and pediatric populations, and generally does not apply to products with Orphan Drug Designation or to ANDAs for generic drugs.

A sponsor who is planning to submit a marketing application for a drug product that is subject to the PREA requirements must submit an initial Pediatric Study Plan (“PSP”). The FDA encourages all applications to submit the PSP as soon as possible in the drug development process, and to discuss the plan with FDA at critical points in the development process. For products intended for life-threatening or severely debilitating illnesses, applicants are encouraged to discuss the PSP at the Pre-IND meeting and End-of-Phase 1 meeting. For products not intended for such illnesses, the FDA recommends that sponsors submit and discuss the PSP no later than the End-of-Phase 2 (“EOP2”) meeting. The initial PSP must include an outline of the pediatric study or studies that the sponsor plans to conduct, including study objectives and design, age groups, relevant endpoints and statistical approach, or a justification for not including such detailed information. The FDA and the sponsor must reach agreement on the PSP. A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the pediatric plan need to be considered based on data collected from preclinical studies, early phase clinical studies or other clinical development programs. The sponsor may submit a request for a deferral of pediatric assessments or a full or partial waiver of the requirement to provide data from pediatric studies along with supporting information. The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of data or full or partial waivers. It is critical that sponsors are in compliance with the PREA, as non-compliance may result in the FDA considering the drug product misbranded solely on that basis.

The FDA also may require submission of a REMS to mitigate any identified or suspected serious risks. The REMS could include medication guides, physician communication plans, assessment plans and elements to assure safe use, such as restricted distribution methods, patient registries or other risk minimization tools.

The FDA reviews all NDAs submitted to ensure that they are sufficiently complete for substantive review before it accepts them for filing. The FDA may request additional information rather than accept an application for filing. In this event, the application must be re-submitted with the additional information. The re-submitted application also is subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review.

The FDA reviews an NDA to determine whether a product is safe and effective for its intended use, which includes assessment of preclinical and clinical data; proposed labeling; chemistry, manufacturing, and control (“CMC”) data; and an assessment of whether the manufacturing processes and facilities meet the appropriate requirements and comply with the applicable regulations (including cGMP requirements and adequate assurance for consistent commercial production of the product within required specifications). There are numerous FDA personnel assigned to review different aspects of an NDA, exercising judgment, discretion, and interpretation of data relative to the review process.

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The FDA may approve an NDA only if, among other things, the methods used in, and the facilities and controls used for, the manufacture processing, packing and testing of the product are adequate to ensure and preserve its identity, strength, quality and purity.

Before approving an NDA, the FDA often will inspect the facility or facilities where the product is or will be manufactured.

The FDA may refer the NDA to an advisory committee for review, evaluation and recommendation as to whether the application should be approved and under what conditions. An advisory committee is a panel of experts, including clinicians and other scientific experts, who provide advice and recommendations when requested by the FDA. The FDA is not bound by the recommendation of an advisory committee, but it considers such recommendations when making decisions.

Additionally, before approving an NDA, the FDA will typically inspect one or more clinical sites to assure clinical data supporting the submission were developed in compliance with GCP.

The approval process is lengthy and difficult, and the FDA may refuse to approve an NDA if the applicable regulatory criteria are not satisfied, or may require additional preclinical, clinical or CMC data or other data and information. Even if such data and information are submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval. Data obtained from clinical studies, as well as other types of supporting data, are not always conclusive and the FDA may interpret data differently than an applicant interprets the same data.

After the FDA’s evaluation of an application, the FDA may issue an approval letter or a complete response letter to indicate that the review cycle is complete and that the application is not ready for approval. A complete response letter generally contains a statement of specific conditions that must be met to secure final approval of the application and may require additional clinical or preclinical testing for the FDA to reconsider the application. The deficiencies identified may be minor, for example, requiring labeling changes, or major, for example, requiring additional clinical studies. Additionally, the complete response letter may include recommended actions that the applicant might take to place the application in a condition for approval. If a complete response letter is issued, the applicant may either resubmit the application, addressing all of the deficiencies identified in the letter, or withdraw the application, or request an opportunity for a hearing.

Even with submission of additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval. If and when those conditions have been met to the FDA’s satisfaction, the FDA will typically issue an approval letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications.

If a product receives regulatory approval, the approval may be significantly limited to specific diseases and dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindications, warnings or precautions be included in the product labeling. In addition, the FDA may require post-approval studies, including Phase 4 clinical studies, to further assess safety and effectiveness after approval and may require testing and surveillance programs to monitor the safety of approved products that have been commercialized. After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and approval.

New Drug Applications

Drug products may obtain FDA marketing approval pursuant to an NDA (described above) for innovator products, or an ANDA for generic products. Relevant to ANDAs, the U.S. Drug Price Competition and Patent Term Restoration Act of 1984 (the “Hatch-Waxman Act”) amended the FDCA to establish a statutory procedure for submission and FDA review and approval of ANDAs for generic versions of branded drugs previously approved by the FDA (such previously approved drugs are also referred to as reference listed drugs). Because the safety and efficacy of reference listed drugs have already been established by the brand company (sometimes referred to as the innovator), the FDA does not require

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new human clinical trials to establish safety and efficacy of generic products. Rather, a generic manufacturer is typically required to conduct bioequivalence studies of its test product against the reference listed drug. The bioequivalence studies for orally administered, systemically available drug products assess the rate and extent to which the active pharmaceutical ingredient is absorbed into the bloodstream from the drug product and becomes available at the site of action. Bioequivalence is established when there is an absence of a significant difference in the rate and extent for absorption of the generic product and the reference listed drug. For some drugs, including locally acting drugs such as topical anti-fungals, other means of demonstrating bioequivalence may be required by the FDA, especially where rate and/or extent of absorption are difficult or impossible to measure. In addition to the bioequivalence data, an ANDA must contain patent certifications and chemistry, manufacturing, labeling and stability data.

A third alternative for obtaining FDA marketing approval is a special type of NDA, commonly referred to as a 505(b)(2) NDA, which enables the applicant to rely, in part, on the FDA’s findings of safety and efficacy of an existing product, or published literature, in support of its application. 505(b)(2) NDAs often provide an alternate path to FDA approval for new or improved formulations or new uses of previously approved products. Section 505(b)(2) permits the filing of an NDA where at least some of the information required for approval comes from studies not conducted by or for the applicant and for which the applicant has not obtained a right of reference. The applicant may rely upon the FDA’s findings with respect to certain preclinical or clinical studies conducted for an approved product. The FDA may also require companies to perform additional studies or measurements to support the change from the approved product. The FDA may then approve the new product candidate for all or some of the label indications for which the referenced product has been approved, as well as for any new indication sought by the 505(b)(2) applicant.

In seeking approval for a drug through an NDA, including a 505(b)(2) NDA, applicants are required to list with the FDA certain patents of the applicant or that are held by third parties whose claims cover the applicant’s product. Upon approval of an NDA, each of the patents listed in the application for the drug is then published in the FDA’s Approved Drug Products with Therapeutic Equivalence Evaluations (the “Orange Book”). Any subsequent applicant who files an ANDA seeking approval of a generic equivalent version of a drug listed in the Orange Book or a 505(b)(2) NDA referencing a drug listed in the Orange Book must make one of the following certifications to the FDA concerning patents: (1) the patent information concerning the reference listed drug product has not been submitted to the FDA; (2) any such patent that was filed has expired; (3) the date on which such patent will expire; or (4) such patent is invalid, unenforceable or will not be infringed upon by the manufacture, use or sale of the drug product for which the application is submitted. This last certification is known as a paragraph IV certification. A notice of the paragraph IV certification must be provided to each owner of the patent that is the subject of the certification and to the holder of the approved NDA to which the ANDA or 505(b)(2) application refers. The applicant may also elect to submit a “section viii” statement certifying that its proposed label does not contain (or “carves out”) any language regarding the patented method-of-use rather than certify to a listed method-of-use patent. An application with a section viii statement or carve out may be approved if the removal of language from the label necessitated by the carve out does not make the generic drug less safe or effective.

If the reference NDA holder or patent owners assert a patent challenge directed to one of the Orange Book listed patents within 45 days of the receipt of the paragraph IV certification notice, the FDA is prohibited from approving the application until the earlier of 30 months from the receipt of the paragraph IV certification expiration of the patent, settlement of the lawsuit or a decision in the infringement case that is favorable to the applicant. The ANDA or 505(b)(2) application also will not be approved until any applicable non-patent exclusivity has expired as described in further detail below. Thus approval of a 505(b)(2) NDA or ANDA can be prevented until all the listed patents claiming the referenced product have expired, until any non-patent exclusivity, such as exclusivity for obtaining approval of a new chemical entity, has expired, and, in the case of a paragraph IV certification and subsequent patent infringement suit, until the earlier of 30 months, settlement of the lawsuit or a decision in the infringement case that is favorable to the ANDA or 505(b)(2) applicant.

The FDA may issue tentative approval of an application if the application meets all conditions for approval but cannot receive effective approval because the listed patents, the 30-month stay or another period of regulatory exclusivity, as applicable, has not expired. If tentative approval is granted, then once such listed patents, 30-month stay or other regulatory exclusivity have expired or, in the case of patents that are subject to a patent infringement suit, been found to be invalid or not infringed, the applicant may seek final approval by submitting an amendment that, among other things,

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includes a safety update and any other changes, if any, in the conditions under which the product was tentatively approved. Prior to granting final approval, the FDA must review and approve any changes reflected in the amendment and may consider any other new information that has come to its attention. An amendment requesting final approval is generally subject to either a 2-month or 6-month review cycle, depending on the information submitted in the amendment.

Combination Products

Medical products containing a combination of drugs, biological products, or medical devices may be regulated as “combination products” in the United States. A combination product generally is defined as a product comprised of components from two or more regulatory categories, such as drug/device, device/biologic or drug/biologic. The term combination product includes: (i) a product comprised of two or more regulated components (i.e., drug/device, biologic/device, drug/biologic or drug/device/biologic, that are physically, chemically or otherwise combined or mixed and produced as a single entity); (ii) two or more separate products packaged together in a single package or as a unit and comprised of drug and device products, device and biological products or biological and drug products; (iii) a drug, device or biological product packaged separately that according to its investigational plan or proposed labeling is intended for use only with an approved individually specified drug, device or biological product where both are required to achieve the intended use, indication or effect and where upon approval of the proposed product the labeling of the approved product would need to be changed, such as to reflect a change in intended use, dosage form, strength, route of administration, or significant change in dose; or (iv) any investigational drug, device or biological product packaged separately that according to its proposed labeling is for use only with another individually specified investigational drug, device, or biological product where both are required to achieve the intended use, indication or effect.

Each constituent part of a combination product is subject to the requirements established by the FDA for that type of constituent part, whether a new drug, biologic or device. In order to facilitate pre-market review of combination products, the FDA designates one of its centers to have primary jurisdiction for the pre-market review and regulation of the overall product based upon a determination by FDA of the primary mode of action of the combination product, and typically one application, such as for a drug/device combination product assigned to the FDA’s Center for Drug Evaluation and Research (“CDER”) an NDA, will be made.

A device with the primary purpose of delivering or aiding in the delivery of a drug and distributed containing a drug (i.e., a “prefilled delivery system”) is typically evaluated by CDER using drug authorities and device authorities, as necessary.

A device with the primary purpose of delivering or aiding in the delivery of a drug and that is distributed without the drug (i.e., unfilled) is typically evaluated by the FDA’s Center for Devices and Radiological Health and CDER, respectively, unless the intended use of the two products, through labeling, creates a combination product.

The FDA has indicated that dry powder inhalers, such as our lead product candidate, YUTREPIA, are drug/device combination products. L606 is also classified as a drug/device combination as it relies on the use of nebulizer. Both YUTREPIA and L606 will seek approval by way of the NDA process by CDER as their primary mode of action is their drug component.

Expedited Development and Review Programs

The FDA is authorized to designate certain products for expedited review if they are intended to address an unmet medical need in the treatment of a serious or life-threatening disease or condition. These expedited review programs are referred to as fast track designation, breakthrough therapy designation and priority review designation. The FDA has published a final Guidance for Industry titled “Expedited Programs for Serious Conditions-Drugs and Biologics” which provides guidance on the FDA programs that are intended to facilitate and expedite development and review of new product candidates as well as threshold criteria generally applicable to concluding that a product candidate is a candidate for these expedited development and review programs.

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The FDA may designate a product for fast track review if it is intended, whether alone or in combination with one or more other products, for the treatment of a serious or life-threatening disease or condition and it demonstrates the potential to address unmet medical needs for such a disease or condition. For fast track products, sponsors may have greater interactions with the FDA and the FDA may initiate review of sections of a fast track product’s application before the application is complete. This rolling review may be available if the FDA determines, after preliminary evaluation of clinical data submitted by the sponsor, that a fast track product may be effective. The sponsor must also provide, and the FDA must approve, a schedule for the submission of the remaining information and the sponsor must pay applicable user fees. However, the FDA’s time period goal for reviewing a fast track application does not begin until the last section of the application is submitted. In addition, the fast track designation may be withdrawn by the FDA if the FDA believes that the designation is no longer supported by data emerging in the clinical trial process.

The FDA may designate a product as a breakthrough therapy if it is intended, either alone or in combination with one or more other products, to treat a serious or life-threatening disease or condition and preliminary clinical evidence indicates that the product may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. The FDA may take certain actions with respect to breakthrough therapies, including holding meetings with the sponsor throughout the development process, providing timely advice to the product sponsor regarding development and approval, involving more senior staff in the review process, assigning a cross-disciplinary project lead for the review team, and taking other steps to design the clinical trials in an efficient manner.

The FDA may designate a product for priority review if it is a product that treats a serious condition and, if approved, would provide a significant improvement in safety or effectiveness. The FDA determines, on a case-by-case basis, whether the proposed product represents a significant improvement when compared with other available therapies. Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition, elimination or substantial reduction of a treatment-limiting product reaction, documented enhancement of patient compliance that may lead to improvement in serious outcomes, and evidence of safety and effectiveness in a new subpopulation. A priority designation is intended to direct overall attention and resources to the evaluation of such applications, and to shorten the FDA’s goal for taking action on a marketing application from ten months to six months.

Accelerated Approval Pathway

The FDA may grant accelerated approval to a drug for a serious or life-threatening condition that provides meaningful therapeutic advantage to patients over existing treatments based upon a determination that the drug has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA may also grant accelerated approval for such a condition when the product has an effect on an intermediate clinical endpoint that can be measured earlier than an effect on irreversible morbidity or mortality, and that is reasonably likely to predict an effect on irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity or prevalence of the condition and the availability or lack of alternative treatments. Drugs granted accelerated approval must meet the same statutory standards for safety and effectiveness as those granted traditional approval.

For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, physical sign or other measure that is thought to predict clinical benefit, but is not itself a measure of clinical benefit. Surrogate endpoints can often be measured more easily or more rapidly than clinical endpoints. An intermediate clinical endpoint is a measurement of a therapeutic effect that is considered reasonably likely to predict the clinical benefit of a drug, such as an effect on irreversible morbidity or mortality. The FDA has limited experience with accelerated approvals based on intermediate clinical endpoints, but has indicated that such endpoints generally may support accelerated approval where the therapeutic effect measured by the endpoint is not itself a clinical benefit and basis for traditional approval, if there is a basis for concluding that the therapeutic effect is reasonably likely to predict the ultimate clinical benefit of a drug.

The accelerated approval pathway is most often used in settings in which the course of a disease is long and an extended period of time is required to measure the intended clinical benefit of a drug, even if the effect on the surrogate or intermediate clinical endpoint occurs rapidly. Thus, accelerated approval has been used extensively in the development and approval of drugs for treatment of a variety of cancers in which the goal of therapy is generally to improve survival

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or decrease morbidity and the duration of the typical disease course requires lengthy and sometimes large trials to demonstrate a clinical or survival benefit.

The accelerated approval pathway is contingent on a sponsor’s agreement to conduct, in a diligent manner, additional post-approval confirmatory studies to verify and describe the drug’s clinical benefit. As a result, a drug candidate approved on this basis is subject to rigorous post-marketing compliance requirements, including the completion of Phase 4 or post-approval clinical trials to confirm the effect on the clinical endpoint. Failure to conduct required post-approval studies, or confirm a clinical benefit during post-marketing studies, would allow the FDA to withdraw the drug from the market on an expedited basis. All promotional materials for drug candidates approved under accelerated regulations are subject to prior review by the FDA.

Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened. In addition, the manufacturer of an investigational drug for a serious or life-threatening disease is required to make available, such as by posting on its website, its policy on responding to requests for expanded access. Furthermore, fast track designation, breakthrough therapy designation, accelerated approval and priority review do not change the standards for approval and may not ultimately expedite the development or approval process.

Post-Approval Requirements

Drugs manufactured or distributed pursuant to FDA approvals are subject to extensive and continuing regulation by the FDA, including, among other things, requirements relating to recordkeeping (including certain electronic record and signature requirements), periodic reporting, drug supply chain security surveillance and tracking requirements, product sampling and distribution, advertising and promotion and reporting of certain adverse experiences, deviations and other problems with the product. After approval, most changes to the approved product, such as adding new indications or other labeling claims are subject to prior FDA review and approval. Under the Prescription Drug User Fee Act, there are also continuing, annual FDA “program fee” requirements for products once they are approved, as well as new application fees for supplemental applications with clinical data.

The FDA strictly regulates labeling, advertising, promotion and other types of information on products that are placed on the market. Products may be promoted only for the approved indications and in accordance with the provisions of the approved label. Further, manufacturers must continue to comply with cGMP requirements, which are extensive and require considerable time, resources and ongoing investment to ensure compliance. In addition, changes to the manufacturing process generally require prior FDA approval before being implemented and other types of changes to the approved product, such as adding new indications and additional labeling claims, are also subject to further FDA review and approval.

Manufacturers and certain other entities involved in the manufacturing and distribution of approved products are required to register their establishments with the FDA and certain state agencies and are subject to periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws. The cGMP requirements apply to all stages of the manufacturing process, including the production, processing, sterilization, packaging, labeling, storage and shipment of the product. Manufacturers must establish validated systems to ensure that products meet specifications and regulatory standards and test each product batch or lot prior to its release. Combination products are subject to FDA regulation to ensure the quality of both the constituent parts and the finished product.

Changes to the manufacturing process are strictly regulated and often require prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP and impose reporting and documentation requirements upon the sponsor and any third-party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to maintain cGMP compliance.

The FDA may impose a number of post-approval requirements as a condition of approval of an application. For example, the FDA may require post-marketing testing, including Phase 4 clinical trials, and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization.

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The FDA may withdraw a product approval if compliance with regulatory requirements is not maintained or if problems occur after the product reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, problems with manufacturing processes, or failure to comply with regulatory requirements, may result in restrictions on the product or even complete withdrawal of the product from the market.

Potential implications include required revisions to the approved labeling to add new safety information; imposition of post-market studies or clinical trials to assess new safety risks; or imposition of distribution or other restrictions under a REMS program. Other potential consequences include, among other things:

The FDA strictly regulates marketing, labeling, advertising, and promotion of products that are placed on the market. Drugs may be promoted only for the approved indications and in accordance with the provisions of the approved label. As a compliance best practice and risk mitigation measure, pharmaceutical companies typically train their sales force regarding the limitations on promotion of products relative to their approved indications for use and concerns regarding potential “off-label promotion.” However, a physician may use products off-label when, in the physician’s independent professional medical judgment, he or she deems it appropriate. Recent court decisions have impacted FDA’s enforcement activity regarding off-label promotion in the light of First Amendment considerations; however, there are still significant risks in this area in part due to the potential for False Claims Act exposure.

The distribution of commercial prescription drugs is subject to the Drug Supply Chain Security Act (“DSCSA”), which regulates the distribution of the products at the federal level, and sets certain standards for federal or state registration and compliance of entities in the supply chain and regulation of manufacturers, repackagers, wholesale distributors, third-party logistics providers, and dispensers. The DSCSA preempts certain previously enacted state pedigree laws and upon taking effect superseded the pedigree requirements of the Prescription Drug Marketing Act (“PDMA”). Trading partners within the drug supply chain must now ensure certain product tracing requirements are met, and are required to exchange transaction information, transaction history, and transaction statements. Product identifier information (an aspect of the product tracing scheme) is also now required. Many states still have in place licensure and other requirements for manufacturers and distributors of drug products. The distribution of product samples continues to be regulated under the PDMA, and some states also impose regulations on drug sample distribution.

From time to time, legislation is drafted, introduced and passed in Congress that could significantly change the statutory provisions governing the approval, manufacturing and marketing of products regulated by the FDA. In addition to new legislation, FDA regulations, guidance and policies are often revised or reinterpreted by the agency in ways that may significantly affect our business and our product candidates. It is impossible to predict whether further legislative or FDA regulation or policy changes will be enacted or implemented and what the impact of such changes, if any, may be.

Patent Term Extension

Depending upon the timing, duration and specifics of FDA approval of the use of our product candidates, some of our United States patents may be eligible for limited patent term extension (“PTE”) under the Hatch-Waxman Act. The Hatch-Waxman Act permits the extension of a patent term by up to five years as compensation for patent term

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effectively lost during product development and the FDA regulatory review process. However, PTE cannot extend the remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period is generally one-half the time between the effective date of an IND and the submission date of an NDA plus the time between the submission date of an NDA and the approval of that application, except that the review period is reduced by any time during which the applicant failed to exercise due diligence. Only one patent applicable to an approved drug is eligible for PTE. PTEs are not granted as a matter of right and must be applied for prior to expiration of the patent and within a sixty-day period from the date the product is first approved for commercial marketing. The U.S. Patent and Trademark Office (the “USPTO”), in consultation with the FDA, reviews and approves the application for any PTE. In the future, we may apply for PTEs, defined as the length of the regulatory review of products covered by our granted patents, for some of our currently owned or licensed applications and patents to add patent life beyond their current expiration dates. The length of such PTEs will depend on the length of the regulatory review; however, there can be no assurance that any such extension will be granted to us.

Regulatory Exclusivity

Regulatory, non-patent exclusivity provisions under the FDCA can also delay the submission or the approval of certain applications. The specific scope varies, but fundamentally the FDCA provides a five-year period of non-patent data exclusivity within the United States to the first applicant to gain approval of an NDA for a new chemical entity. A drug is a new chemical entity (“NCE”) if the FDA has not previously approved any other new drug containing the same active moiety, which is the molecule or ion responsible for the action of the drug substance. During the NCE exclusivity period, the FDA may not accept for review an ANDA or a 505(b)(2) NDA submitted by another company for another version of such drug where the applicant does not own or have a legal right of reference to all the data required for approval. However, an application may be submitted after four years if it contains a certification of patent invalidity or non-infringement.

The FDCA also provides three years of marketing exclusivity for an NDA, 505(b)(2) NDA or supplement to an existing NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored by the applicant are deemed by the FDA to be essential to the approval of the application, for example, for new indications, dosages or strengths of an existing drug. This three-year new clinical investigation marketing exclusivity covers only the conditions of use associated with the new clinical investigations and does not prohibit the FDA from approving applications for drugs containing the original active agent. This three-year new clinical investigation marketing exclusivity does not preclude submission of the ANDA or Section 505(b)(2) NDA for such a product but prevents the FDA from giving final approval to such product. Five-year and three-year exclusivity will not delay the submission or approval of a full NDA. However, an applicant submitting a full NDA would be required to conduct or obtain a right of reference to all of the preclinical studies and adequate and well-controlled clinical studies necessary to demonstrate safety and effectiveness.

Under the FDCA, the FDA may grant orphan designation to a drug intended to treat a rare disease or condition, which is a disease or condition that affects fewer than 200,000 individuals in the United States or, if it affects more than 200,000 individuals in the United States, there is no reasonable expectation that the cost of developing and making a drug product available in the United States for this type of disease or condition will be recovered from sales of the product. Orphan designation must be requested before submitting an NDA. After the FDA grants orphan designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan designation does not convey any advantage in or shorten the duration of the regulatory review and approval process. If a product that has orphan designation subsequently receives either the first FDA approval for the disease or condition for which it has such designation or, if not the first FDA approval for such drug for the treatment of such disease or condition, such drug is clinically superior to any already approved or licensed drug that is the same drug for such disease or condition, the product is entitled to orphan product marketing exclusivity, which means that the FDA may not approve any other applications to market the same drug or biological product for the same indication for seven years, except in limited circumstances, such as a showing of clinical superiority to the product with orphan exclusivity or inability to manufacture the product in sufficient quantities. The designation of such drug also entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and user-fee waivers. Competitors, however, may receive approval of different products for the indication for which the orphan product has exclusivity or obtain approval for the same product but for a different indication for which the orphan product has exclusivity. If an orphan designated product receives marketing approval for an indication broader than what is designated, it may not be

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entitled to orphan exclusivity. In addition, exclusive marketing rights in the United States may be lost if the FDA later determines that the request for designation was materially defective or if the manufacturer is unable to assure sufficient quantities of the product to meet the needs of patients with the rare disease or condition.

Pediatric exclusivity is another type of exclusivity in the United States. Pediatric exclusivity, if granted, provides an additional six months to the term of any existing regulatory exclusivity, including the non-patent exclusivity periods described above. This six-month exclusivity may be granted based on the voluntary completion of a pediatric clinical study that “fairly responds” to an FDA-issued “Written Request” for such a clinical study.

Pharmaceutical Coverage, Pricing and Reimbursement

In the United States, sales of any products for which we may receive regulatory approval for commercial sale will depend in part on the availability of coverage and reimbursement from third-party payors. Third-party payors include government authorities, managed care providers, private health insurers and other organizations.

Significant uncertainty exists as to the coverage and reimbursement status of any products for which we have or obtain regulatory approval. Some of the additional requirements and restrictions on coverage and reimbursement levels imposed by third-party payors influence the purchase of healthcare services and products. The process for determining whether a third-party payor will provide coverage for a product may be separate from the process for establishing the reimbursement rate that such a payor will pay for the product. Third-party payors may limit coverage to specific drugs on an approved list, or formulary, which might not include all of the FDA-approved drugs for a particular indication, or place drugs at certain formulary levels that result in lower reimbursement levels. Moreover, a payor’s decision to provide coverage for a drug product does not imply that an adequate reimbursement rate will be approved. Adequate third-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product development. Further, one payor’s determination to provide coverage does not assure that other payors will also provide coverage and reimbursement for the product, and the level of coverage and reimbursement may differ significantly from payor to payor as there is no uniform policy of coverage and reimbursement for drug products among third-party payors. In addition, payors may change their coverage and reimbursement with respect to any given product over time, so the fact that a drug product is covered at one point in time does not mean that it will continue to be covered or that other products will not be preferred in the future.

Reimbursement may also impact the demand for drug products that obtain marketing approval. If coverage for a drug product is obtained by a third-party payor, the resulting reimbursement payment rates may not be adequate or may require co-payments that patients find unacceptably high. Further, third party payors require onerous prior approvals or implement other forms of restricted access that make it difficult for patients to utilize our drug products. Patients who are prescribed medications for the treatment of their conditions, and their prescribing physicians, generally rely on third-party payors to reimburse all or part of the costs associated with their prescription drugs. Prescribing physicians are unlikely to use or prescribe drug products unless coverage is provided and reimbursement is adequate to cover all or a significant portion of the cost of those drug products. If reimbursement is not available, or is available only to limited levels, a drug product which has obtained marketing approval may not be successfully commercialized.

Third-party payors are increasingly challenging the price and examining the medical necessity and cost-effectiveness of medical products and services, in addition to their safety and efficacy. In order to obtain and maintain coverage and reimbursement for any product that might be approved for sale, we may need to conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of any products, in addition to the costs required to obtain regulatory approvals. Our product candidates may not be considered medically necessary or cost-effective. If third-party payors do not consider a product to be cost-effective compared to other available therapies, they may not cover the product after approval as a benefit under their plans or, if they do, the level of payment may not be sufficient to allow a company to sell its products at a profit.

The U.S. government and state legislatures have shown significant interest in implementing cost containment programs to limit the growth of government-paid healthcare costs, including price controls, restrictions on reimbursement and coverage and requirements for substitution of generic products for branded prescription drugs. There has been increasing legislative and enforcement interest in the United States with respect to drug pricing practices. For example, U.S. federal

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prosecutors have issued subpoenas to pharmaceutical companies seeking information about pricing practices in connection with an investigation into pricing practices being conducted by the DOJ. Several state attorneys general also have commenced drug pricing investigations and filed lawsuits against pharmaceutical companies, and the U.S. Senate has publicly investigated a number of pharmaceutical companies relating to price increases and pricing practices. Proposed legislation has been designed to, among other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drugs. Federal budget proposals have included measures to permit Medicare Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drug prices under Medicaid, and to eliminate cost sharing for generic drugs for low-income patients. At the state level, legislatures have increasingly passed legislation and implemented regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. Adoption of government controls and measures, and tightening of restrictive policies in jurisdictions with existing controls and measures, could exclude or limit our drugs and product candidates from coverage and limit payments for pharmaceuticals. We continue to monitor the potential impact of proposals to lower prescription drug costs at the federal and state level, and anticipate that current and future U.S. federal and state legislative proposals may result in additional downward pressure on drug pricing and reimbursement, which could have a significant impact on our business.

A manufacturer must participate in a federal program known as the 340B drug pricing program by entering into various programs for federal funds to be available to pay for the manufacturer’s drugs under Medicaid. The 340B program requires a participating manufacturer to charge certain federally funded clinics and safety net hospitals no more than an established discounted price for its covered outpatient drugs, per a formula defined by statute to determine the discounted price, which is based on the average manufacturer price (“AMP”) and the unit rebate amount as calculated under the Medicaid Drug Rebate Program, discussed further below. Manufacturers must report pricing information to CMS for the Health Resources and Services Administration (“HRSA”) on a quarterly basis. HRSA has also issued regulations relating to the calculation of the ceiling price as well as imposition of civil monetary penalties for each instance of knowingly and intentionally overcharging a 340B covered entity.

The Inflation Reduction Act of 2022 (the “IRA”), which includes certain new tax measures, was signed into law in August 2022. The IRA contains two main tax provisions, a new corporate alternative minimum tax imposed on certain corporations meeting average annual financial statement income of more than $1 billion during a three-year tax period, and an excise tax imposed upon share repurchases by certain publicly traded corporations. The IRA is effective for tax years beginning after December 31, 2022; we are evaluating the provisions of the IRA but currently do not believe these provisions will have a material impact on our consolidated financial statements. Among other things, the IRA requires manufacturers of certain drugs to engage in price negotiations with Medicare (beginning in 2026 with a second-year list being announced for 2027), imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation, and replaces the Part D coverage gap discount program with a new discounting program, which began in 2025. Failure to comply with requirements under the drug price negotiation program or pay the identified rebates is subject to an excise tax and/or a civil monetary penalty. The IRA permits the Secretary of the Department of Health and Human Services (“HHS”) to implement many of these provisions through guidance, as opposed to regulation, for the initial years. Certain legal challenges from pharmaceutical manufacturers and others in the industry continue, including challenges to the constitutionality and administrative implementation of the IRA’s drug price negotiation provisions. For these and other reasons, it is currently unclear how the IRA will be effectuated and the impact of the IRA on the pharmaceutical industry and on generic drug pricing cannot yet be fully determined. We cannot predict whether the IRA, in whole or in part, will be overturned, repealed, replaced, or amended.

In addition, we expect that the increased emphasis on managed care and cost containment measures in the United States by third-party payors and government authorities to continue and will place pressure on pharmaceutical pricing and coverage. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable coverage and reimbursement status is attained for one or more products for which we receive regulatory approval, less favorable coverage policies and reimbursement rates may be implemented in the future.

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Other Healthcare Laws and Compliance Requirements

Healthcare providers, physicians and third-party payors often play a primary role in the recommendation and prescription of our drug products and products for which we may provide contracted promotional services to third parties. Our current and future arrangements with healthcare providers, physicians, third-party payors and customers, and our sales, marketing and educational activities, may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations (at the federal and state level) that may constrain our business or financial arrangements and relationships through which we market, sell, or distribute drug products.

Among the laws and regulations that may affect our ability to operate and may present risk to our business are those, at the federal and state level, on topics including: anti-kickback, false claims, and other healthcare fraud, waste, and abuse matters; drug pricing and price reporting; advertising, promotion, and other types of communications regarding pharmaceutical products; limitations on and transparency regarding financial relationships with healthcare professionals; and data privacy and security. See Item 1A. Risk Factors –Risks Related to Government Regulation.

Healthcare Reform

A primary trend in the U.S. healthcare industry and elsewhere is cost containment. There have been a number of federal and state proposals during the last few years regarding the pricing of pharmaceutical and biopharmaceutical products, limiting coverage and reimbursement for drugs and other medical products, government control and other changes to the healthcare system in the United States including the Patient Protection and Affordable Care Act of 2010, as amended by the Health Care and Education Affordability Reconciliation Act (collectively, the “ACA”).

In the future, there may continue to be additional proposals relating to the reform of the U.S. healthcare system, some of which could further limit the prices we will be able to charge for our product candidates, or the amounts of reimbursement available for our product candidates. If future legislation were to impose direct governmental price controls or access restrictions, it could have a significant adverse impact on our business. Managed care organizations, as well as Medicaid and other government agencies, continue to seek price discounts. Some states have implemented, and other states are considering, measures to reduce costs of the Medicaid program, and some states are considering implementing measures that would apply to broader segments of their populations that are not Medicaid-eligible. Due to the volatility in the current economic and market dynamics, we are unable to predict the impact of any unforeseen or unknown legislative, regulatory, payor or policy actions, which may include cost containment and healthcare reform measures. Such policy actions could have a material adverse impact on our profitability.

These and other healthcare reform initiatives may result in additional reductions in Medicare and other healthcare funding, which could have a material adverse effect on our financial operations. We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our product candidates or additional pricing pressures.

Government Regulation Outside of the United States

In order to market any product outside of the United States, we will need to comply with numerous and varying regulatory requirements of other countries and jurisdictions regarding development, approval, commercial sales and distribution of our products, and governing, among other things, clinical trials, marketing authorization, commercial sales and distribution of YUTREPIA and our product candidates, if approved. Whether or not we obtain FDA approval for a product, we must obtain the necessary approvals by the comparable regulatory authorities of foreign countries before we can commence clinical trials or marketing of the product in those countries. The approval process varies between countries and jurisdictions and can involve additional product testing and additional administrative review periods. The time required to obtain approval in other countries and jurisdictions might differ from and be longer than that required to obtain FDA approval. Regulatory approval in one country or jurisdiction does not ensure regulatory approval in another, but a failure or delay in obtaining regulatory approval in one country or jurisdiction may negatively impact the regulatory process in others.

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European Union

In the European Union (“EU”) and the European Economic Area (“EEA”), Regulation (EU) 536/2014 on clinical trials (the “CTR”) requires sponsors to submit a single clinical trial application (“CTA”) through the Clinical Trials Information System (“CTIS”), an online portal designed to streamline the authorization process. Under the previous Directive 2001/20/EC (the “CTD”), sponsors had to obtain separate approvals in each EU/EEA member state. In contrast, CTIS serves as a single-entry point, allowing sponsors to apply for trial authorization in up to 30 EU/EEA countries through a unified process. The CTIS authorization procedure consists of two parts: (i) during the Part I assessment, member states collaborate to assess the CTA jointly and (ii) during the Part II assessment, each member state conducts an individual assessment of the CTA. All ongoing clinical trials in the EU/EEA were required to transition to CTIS by January 30, 2025, marking the end of a three-year transition period that began when the CTR became applicable, repealing the CTD.

Medicinal products need a marketing authorization (“MA”) to be placed on the EU market. The MA is issued following a scientific assessment of the quality, safety, and efficacy of the product. To obtain an MA, pharmaceutical companies may submit MA applications (“MAA”) under the centralized, decentralized, mutual recognition, or national authorization procedure.

Under the centralized procedure, the European Commission (“EC”) grants a single MA, valid in all EU/EEA member states, following a favorable opinion from the EMA. The centralized procedure is compulsory for medicines produced by specified biotechnological processes, products designated as orphan medicinal products, advanced-therapy medicinal products (“ATMPs”), and products with a new active substance indicated for the treatment of specified diseases, such as HIV/AIDS, cancer, diabetes, neurodegenerative disorders, autoimmune diseases and other immune dysfunctions, or viral diseases. The centralized procedure is optional for products containing new active substances for indications other than those stated above, products that represent a significant therapeutic, scientific, or technical innovation, or whose authorization would be in the interest of public health. Under this procedure, the maximum evaluation timeframe for an MAA by the EMA is 210 days, excluding “clock stops” when the applicant must provide additional written or oral information in response to questions from the Committee for Medicinal Products for Human Use (“CHMP”). Alternative pathways may apply in specific cases, including:

While the mutual recognition procedure (“MRP”) and decentralized procedure (“DP”) both result in national MAs, the assessment process is coordinated across the EU. The key difference between such procedures is that the MRP applies to products already authorized in at least one EU member state on a national basis and the DCP is used for products not yet authorized in any EU member state. The evaluation process can take up to 210 days under the DCP and 90 days under the MRP after the submission of a valid MAA. Once all involved member states reach an agreement on the assessment, the procedure concludes, and each member state must grant a national MA. While this authorization should be issued within 30 days, in practice, national phase timelines and fees vary, as they are subject to individual national regulations. The national procedure grants an MA that is valid only in the member state where it is issued.

An MA has an initial validity of five years, with some exceptions. The MA may be renewed after five years on the basis of a re-evaluation of the risk-benefit balance by the EMA or by the competent authority of the EU member state in which the original MA was granted. The EC or the competent authorities of the EU member states may decide, on justified

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grounds relating to pharmacovigilance, to proceed with one further five year renewal period for the MA. Once subsequently definitively renewed, the MA shall be valid for an unlimited period.

The EMA’s Committee for Orphan Medicinal Products (“COMP”) may recommend orphan medicinal product designation to promote the development of medicines for life-threatening or chronically debilitating conditions affecting no more than five in 10,000 people in the EU. The COMP can only recommend orphan designation to products that offer a significant clinical benefit over existing approved treatments for the relevant indication. Orphan medicinal product designation entitles the sponsor to financial incentives, such as fee reductions or waivers, and grants 10 years of market exclusivity following approval of the MA. During this period, regulatory authorities cannot approve a similar medicinal product for the same therapeutic indication unless the holder of the MA for the original orphan medicinal product has given his consent to the second applicant, the new product offers a significant clinical benefit, or the holder of the MA for the original orphan product is unable to supply sufficient quantities. This period of protection is extended by two years for medicines that also have complied with an agreed pediatric investigation plan granted at the time of review of the orphan medicine designation.

In the EU, MAAs for generic medicinal products do not require the inclusion of preclinical and clinical trial results. Instead, they can refer to the data included in the MA of a reference product, provided that the data exclusivity period for the reference product has expired.

Medicines containing a new active substance qualify for eight years of data exclusivity and are granted an additional two years of market exclusivity upon MA. The data exclusivity period prevents generic applicants from relying on the preclinical and clinical trial data in the dossier of the reference product when applying for a generic MA in the EU. This restriction lasts for eight years from the date the reference product was first authorized in the EU. The market exclusivity period prevents a successful generic applicant from commercializing its product in the EU until 10 years have passed since the initial MA of the reference product in the EU. This 10-year market exclusivity period can be extended to a maximum of 11 years if, during the first eight years, the MA holder obtains approval for one or more new therapeutic indications that, upon scientific evaluation, are determined to bring a significant clinical benefit compared to existing therapies.

Controls on the pricing of medicines in the EU, as well as decisions on their reimbursement by national social security systems, are determined exclusively at the national level. As a result, access to reimbursement and pricing decisions can vary significantly across the member states.

Recently adopted and pending legislation in the EU will impact regulatory procedures for medicinal products, including the Regulation (EU) 2021/2282 on health technology assessment adopted in January 2025, which, among other things, is designed to increase cooperation between EU member states to provide for a common assessment of clinical effectiveness to be taken into account by national reimbursement authorities across the EU. In addition, in April 2023, the European Commission adopted a proposal to revise the EU pharmaceutical legislation consisting of a new directive that would replace Directive 2001/83/EC and Regulation (EC) 726/2004, among others. The EU legislative process remains ongoing, with several stages still required before the regulations may receive final approval. If approved, such regulations would mark a significant overhaul of the current EU pharmaceutical legal framework and is anticipated to have a wide range of impact, including, but not limited to, regulatory approval procedures, regulatory data and market exclusivity periods, incentives for orphan medicines, and the so-called “Bolar exemption,” among others.

Regulation (EU) 2017/745 (the “MDR”) governs medical devices in the EU. Unlike medicinal products, medical devices do not require prior authorization from regulatory authorities. However, they must undergo a conformity assessment procedure and obtain the “CE” marking before being placed on the EU market. The specific conformity assessment procedure varies depending on the device’s risk classification. For Class I devices, manufacturers may carry out the conformity assessment autonomously. Conversely, for Class IIa, IIb, and III devices, the assessment requires the involvement of a notified body. Medical devices intended to administer medicinal products qualify as (i) medical devices, where the medicinal product is supplied separately, or (ii) medicinal products, where the device and the medicinal product are placed on the market as a “single integral product” which is intended exclusively for use in the given combination and is not reusable. Single integral products must be authorized as medicines in the EU, while also meeting the general requirements that apply to medical devices. Examples of single integral products include pre-filled

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syringes, pre-filled pens, nebulizers pre-charged with a specific medicinal product, patches for transdermal drug delivery and pre-filled inhalers.

United Kingdom

The Medicines and Healthcare products Regulatory Agency (“MHRA”) is the standalone regulator for medicinal products and medical devices in the United Kingdom. Starting in January 2025, only the MHRA has authority to approve new medicines across the entire United Kingdom, whereas for medical devices, the EU rules continue to apply with respect to Northern Ireland only.

MAs for medicinal products in the United Kingdom are governed by the Human Medicines Regulations (SI 2012/1916), as amended. Since January 2021, MAs previously submitted using the EU centralized procedure are not valid to be considered in the United Kingdom. As a result, companies established in the United Kingdom cannot use the EU centralized procedure and instead must follow one of the United Kingdom’s national authorization procedures or remaining international cooperation procedures established after the United Kingdom’s withdrawal from the European Union in 2020 (“Brexit”) to obtain an MA to market products in the United Kingdom. All existing EU MAs for centrally authorized products were automatically converted or grandfathered into MAs in the United Kingdom, effective in Great Britain only, free of charge starting in January 2021, unless the MA holder opted-out of this option.

The MHRA has introduced additional changes to MA procedures in the United Kingdom post-Brexit. This includes the introduction of procedures to prioritize access to new medicines that will benefit patients, which includes a 150-day assessment route and a rolling review procedure. In addition, since January 2024, the MHRA has been able to rely on the International Recognition Procedure (“IRP”) when reviewing certain types of MAs. This procedure is available for MA applicants who have already received approval for the same product from a reference regulator, which includes the FDA, the EMA, and national competent authorities of individual EU countries. A positive opinion from the EMA and CHMP, or a positive end of procedure outcome from the EU mutual recognition or decentralized procedures are also considered to have received marketing approval for the purposes of the IRP.

There is no pre-marketing authorization orphan designation for medicinal products in the United Kingdom. The MHRA reviews applications for orphan designation in parallel to the corresponding MA. The orphan designation criteria in the United Kingdom are similar to those in the EU, but have been tailored for the United Kingdom market. For example, to be eligible for orphan designation in the United Kingdom, the prevalence of the condition in Great Britain, rather than the EU, must not be more than five in 10,000 individuals. Upon the grant of an MA with orphan designation, the medicinal product will benefit from up to 10 years of market exclusivity from similar products in the approved orphan indication. This market exclusivity period will begin on the date of first approval of the product in Great Britain.

The current regulatory framework in the United Kingdom with respect to clinical trials is derived from the EU CTD. Amendments to the United Kingdom’s regulatory framework governing clinical trials are currently going through the parliamentary process, and the new rules are expected to apply starting in 2026, following a one-year transition period.

The regulatory framework in the United Kingdom with respect to medical devices is also expected to undergo significant changes. The current applicable legislation in Great Britain is largely still based on the European Economic Community’s Medical Devices Directives (93/42/EEC), which is no longer in effect in the EU after the adoption of the MDR, which came into effect after Brexit, and consequently was only implemented in Northern Ireland according to the provisions of the Windsor Framework. Notwithstanding the differing legal regimes in place in the United Kingdom, medical devices with a valid CE marking from the EU are authorized to be placed in the United Kingdom market until June 30, 2030 at the latest, depending on the device type and classification.

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Item 1A. Risk Factors

Investing in our common stock involves a high degree of risk. You should carefully consider the risks described below, as well as the other information in this Annual Report on Form 10-K, including our financial statements and the related notes thereto, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and the information contained under the heading “Cautionary Note Regarding Forward-Looking Statements” before deciding

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whether to invest in our common stock. The occurrence of any of the events or developments described below could harm our business, financial condition, results of operations and growth prospects. In such an event, the market price of our common stock could decline and you may lose all or part of your investment. Additional risks and uncertainties not presently known to us or that we currently deem immaterial also may impair our business operations. We may update these risk factors in our periodic and other filings with the SEC.

The following is a summary of the principal risk factors described in this section:

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Risks Related to our Financial Position and Need for Additional Capital

We expect to incur significant expenses for the foreseeable future as we commercialize YUTREPIA and advance YUTREPIA and our other product candidates through clinical trials, seek regulatory approvals and pursue commercialization of new indications for YUTREPIA and any approved product candidates. The future viability of our company will depend on our ability to fund future operations and capital requirements with revenue from YUTREPIA and, if necessary, additional capital from external financing.

We are subject to risks and uncertainties common to companies in the biotechnology industry, including, but not limited to, development by competitors of new technological innovations, dependence on key personnel, protection of proprietary technology, compliance with government regulations, and the ability to fund future operations and capital requirements through product sales or, if necessary, additional capital from external financing. We expect to incur significant expenses for the foreseeable future as we commercialize YUTREPIA and advance YUTREPIA and our other product candidates through clinical trials, seek regulatory approval and pursue commercialization of any approved product candidates. Our ability to generate sustained revenue will be adversely affected if we are unable to maintain FDA approval for and successfully commercialize YUTREPIA or obtain marketing approval for and successfully commercialize one or more of our other product candidates. United Therapeutics is seeking injunctive relief that would require us to remove YUTREPIA from the market or remove one or both of PAH and PH-ILD from its label, which would limit our ability to commercialize YUTREPIA, if we are able to do so at all. Even with marketing approval for

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YUTREPIA and any of our other product candidates for which we may receive marketing approval in the future, we will continue to incur significant expenses, including those related to product manufacturing, marketing, sales and distribution. These efforts require significant amounts of capital, adequate personnel and infrastructure, and extensive compliance-reporting capabilities. It is uncertain if we will be able to continue to generate sustained revenue from product sales. The future viability of our company will depend on our ability to fund future operations and capital requirements with revenue from YUTREPIA and, if necessary, additional capital from external financing. We may seek additional funding through public or private financings, debt financing or collaboration. Our inability to obtain funding, if and when needed, would have a negative impact on our financial condition and ability to pursue our business strategies.

We have a history of losses and our ability to sustain profitability in the future remains uncertain.

Although we achieved profitability in the third and fourth quarters of 2025 and had positive operating cash flows in the fourth quarter of 2025, our ability to maintain profitability and positive operating cash flows in the future remains uncertain. We have incurred net losses of $68.9 million during the year ended December 31, 2025, and $128.3 million and $78.5 million during the years ended December 31, 2024 and 2023, respectively. We also had negative operating cash flows for each of these periods. As of December 31, 2025, we had an accumulated deficit of $626.3 million.

Our ability to sustain profitability and positive cash flows will be affected by, among other factors, the timing and magnitude of our expenses, including payments related to the HCR Agreement and expenses related to our planned clinical studies and planned clinical studies. Since our incorporation, we have invested heavily in the development of our products and product candidates and technologies, as well as in recruiting management and scientific personnel. We have only recently started commercialization of YUTREPIA, and future cash flows from the sale of YUTREPIA remain uncertain. Revenue generated from YUTREPIA and Treprostinil Injection may be insufficient to match our operating expenses, particularly if United Therapeutics is successful in obtaining injunctive relief that would limit our ability to commercialize YUTREPIA, if we are able to do so at all. We expect to continue to devote substantial financial and other resources to the commercialization of YUTREPIA and further clinical development of YUTREPIA and our other product candidates and, as a result, must generate sustained revenue to achieve and maintain profitability. In the future, we may incur losses and have periods of negative cash flow and we may require additional funding to continue our operations and maintain compliance with debt covenants, and could be required to delay, reduce, or eliminate research and development programs, product portfolio expansion, or commercialization efforts, which could adversely affect our business prospects, or potentially force us to cease operations.

In the event revenues from YUTREPIA are insufficient to support our future capital needs, we expect that we would need further financing for our existing business and future growth, which may not be available on acceptable terms, if at all. Failure to obtain funding, if needed, on acceptable terms and on a timely basis may require us to curtail, delay or discontinue our product commercialization and development efforts or other operations. The failure to obtain further financing may also prevent us from capitalizing on other potential product candidates or indications which may be more profitable than YUTREPIA and/or L606 or for which there may be a greater likelihood of success.

We may need to raise additional funds to meet our future funding requirements for commercialization and further clinical development of YUTREPIA and continued research, development and commercialization of our product candidates and technology. Our future funding requirements will be heavily determined by the success of commercialization of YUTREPIA and the resources needed to support development of new indications for YUTREPIA and development of our other product candidates. United Therapeutics is seeking injunctive relief that would require us to remove YUTREPIA from the market or remove one or both of PAH and PH-ILD from its label, which would limit our ability to commercialize YUTREPIA, if we are able to do so at all. In the event that funds generated from our operations are insufficient to fund our future growth, we may raise additional funds through the issuance of equity or debt securities or by borrowing from banks or other financial institutions. We cannot assure you that we will be able to obtain such additional financing on terms that are acceptable to us, or at all. Global and local economic conditions could negatively affect our ability to raise funds. To the extent that we raise additional capital through the sale of equity or convertible debt securities, your ownership interest will be diluted, and the terms of such securities may include liquidation or other preferences that adversely affect your rights as a stockholder. Such financing, even if obtained, may

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be accompanied by restrictive covenants that may, among other things, limit our ability to pay dividends or require us to seek consent for payment of dividends, or restrict our freedom to operate our business by requiring consent for certain actions.

If we need additional financing and fail to obtain it on terms that are favorable to us, we may not be able to implement our growth plans, and we may be required to significantly curtail, delay or discontinue one or more of our research, development or manufacturing programs or the commercialization of YUTREPIA or any other approved product. Furthermore, if we fail to obtain additional financing on terms that are acceptable to us, we may forgo or delay the pursuit of opportunities presented by other potential product candidates or indications that may later prove to have greater commercial potential than the product candidates and indications that we have chosen to pursue.

Our financing facility with HCR contains operating and financial covenants that restrict our business and financing activities, and is subject to acceleration in specified circumstances, which may result in HCR taking possession and disposing of any collateral.

Under the terms of the HCR Agreement, we may not, among other actions, without the prior written consent of HCR, (a) pay any dividends or make any other distribution or payment or redeem, retire or purchase any capital stock, except in certain prescribed circumstances, (b) create, incur, assume, or be liable with respect to any indebtedness except certain permitted indebtedness, or make or permit any payment on any indebtedness, except under certain limited circumstances, or (c) make any sale, transfer, out-license, lease or other disposition of any property or any economic interest, other than certain limited exceptions. Additionally, we are required to maintain at all times a minimum cash balance of $15.0 million. Our obligations under the HCR Agreement are collateralized by all of our assets and property, subject to limited exceptions.

If we breach certain of our covenants in the HCR Agreement and are unable to cure such breach within the prescribed period or are not granted waivers in relation to such breach or if we experience a material adverse event, it may constitute an event of default under the HCR Agreement, giving HCR the right to require us to repay the then outstanding obligations immediately, and HCR could, among other things, foreclose on the collateral granted to them to collateralize such indebtedness, which includes our intellectual property, if we are unable to pay the outstanding debt immediately.

Our management has broad discretion in using our available capital and may not use it effectively.

We are using our available capital, including funds generated through our business operations, the net proceeds of our financing facility with HCR, and the net proceeds of our prior public and private equity offerings, to support the development and commercialization of YUTREPIA, the commercialization of Treprostinil Injection, the development of L606, and for general corporate purposes. Our management has broad discretion in the application of such capital and could spend it in ways that do not improve our results of operations or enhance the value of our equity. The failure by our management to apply these funds effectively could result in financial losses that could have a material adverse effect on our business, diminish funds available to service our obligations to HCR, cause the value of our equity to decline and delay the development of our products and product candidates. Pending their use, we may invest such proceeds in short-term, investment-grade, interest-bearing securities, which may not yield favorable returns.

We depend on skilled labor, and our business and prospects may be adversely affected if we lose the services of our skilled personnel, including those in senior management, or are unable to attract new skilled personnel.

Our ability to continue our operations and manage our potential future growth depends on our ability to hire and retain suitably skilled and qualified employees, including those in senior management, in the long-term. Due to the specialized nature of our work, there is a limited supply of suitable candidates. We compete with other biotechnology and pharmaceutical companies, educational and research institutions and government entities, among others, for research, technical, clinical and sales and marketing personnel. In addition, in order to manage our potential future growth effectively, we may need to further improve our financial controls and systems and, as necessary, recruit sales, marketing, managerial and finance personnel. The loss of the services of members of our sales team could seriously harm our ability to successfully implement our business strategy. If we are unable to attract and retain skilled personnel,

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including in particular Roger Jeffs, our Chief Executive Officer, we may not be able to successfully implement the tasks necessary to further develop and commercialize our products and product candidates and, accordingly, our business and prospects may be materially and adversely affected.

Our ability to use our net operating loss carry forwards and research and development tax credits may be limited.

Under Section 382 of the Internal Revenue Code of 1986, as amended (the “IRC”), if a corporation undergoes an “ownership change”, generally defined as a greater than 50.0% change (by value) in its equity ownership over a three-year period, the corporation’s ability to use its pre-change net operating loss carryforwards (“NOLs”) and other pre-change tax attributes, such as research and development tax credits, to offset its post-change taxable income or tax liabilities may be limited. During the year ended December 31, 2025, we completed a study to assess whether historical equity transactions resulted in an ownership change within the meaning of Section 382 of the IRC. Based on this analysis, we determined that an ownership change occurred in a prior year. As a result, the utilization of a portion of our carryforwards is subject to an annual limitation under Section 382. The limitation may cause certain NOLs to expire unused before being fully utilized. Subsequent ownership changes may further limit our ability to use our net operating loss carryforwards and research and development tax credits to offset future potential taxable income or tax liabilities. In addition, certain states have suspended use of net operating loss carryforwards for certain taxable years, and other states are considering similar measures. Depending on our future tax position, continued suspension of our ability to use NOLs could result in increased future tax liability to us and could have an adverse income on our results of operations and financial condition.

Changes to existing tax laws, or challenges to our tax positions could adversely affect our business and financial condition.

The tax regimes to which we are subject or under which we operate are unsettled and may be subject to significant change. There is uncertainty regarding future legislative and regulatory changes and policies related to matters such as taxation and importation, and any such proposed or enacted regulations by the current or a future U.S. administration, Congress, or taxing authorities in other jurisdictions could materially affect our tax obligations and operating results.

For example, beginning in 2022, the Tax Cuts and Jobs Act of 2017 eliminated the option to deduct research and development expenditures in the year incurred and instead requires taxpayers to capitalize and subsequently amortize such expenditures over five years for research activities conducted in the United States and over 15 years for research activities conducted outside the United States. The One Big Beautiful Bill Act (“OBBBA”) reinstates the option to deduct domestic research and development expenditures in the year incurred, commencing with tax years beginning after December 31, 2024. Foreign research and development expenditures remain subject to the 15-year capitalization and amortization requirement. The OBBBA also includes other significant provisions, including tax cut extensions and modifications to the international tax framework. In addition, the Inflation Reduction Act (“IRA”), among other things, included a new 15% alternative minimum tax on the adjusted financial statement income of certain large corporations for tax years beginning in 2023. To the extent that such changes have a negative impact on us, including as a result of related uncertainty, these changes could adversely impact our business, results of operations and financial position.

In addition, U.S. federal, state and local tax laws are extremely complex and subject to various interpretations. Although we believe that our tax estimates and positions are reasonable, there can be no assurance that our tax positions will not be challenged by relevant tax authorities. If the relevant tax authorities assess additional taxes on us, this could result in adjustments to, or impact the timing or amount of, taxable income, deductions or other tax allocations, which may adversely affect our results of operations and financial position.

We are a biopharmaceutical company with only one approved product that was only recently approved by the FDA, which may make it difficult for you to evaluate our business, financial condition and prospects.

We are a biopharmaceutical company with only one approved product, which was approved by the FDA in May 2025 and began commercialization in June 2025. Accordingly, we have only a short history of commercial operations upon which you can evaluate our prospects. Drug product development and commercialization involves a substantial degree of uncertainty. Having only recently obtained final marketing approval for YUTREPIA, our first approved product, the future revenue, profitability and cash flows, if any, from commercialization of YUTREPIA remain uncertain. We may

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not be able to continue to generate sustained revenue, profitability or positive cash flow from YUTREPIA or any other pharmaceutical products or successfully overcome the risks and uncertainties frequently encountered by companies undertaking drug product development and commercialization. Consequently, your ability to assess our business, financial condition and prospects may be significantly limited. Further, the net revenue and net losses that we incur may fluctuate significantly from quarter-to-quarter and year-to-year, such that a period-to-period comparison of our results of operations may not be a good indication of our future performance. Other unanticipated costs may also arise in connection with the development of our products and product candidates and commercialization of YUTREPIA.

Sales of YUTREPIA and Treprostinil Injection are dependent on market acceptance by patients, health care providers and by third-party payors, while interactions with these persons and entities are subject to compliance requirements.

Arrangements with healthcare providers, physicians, third-party payors and customers, and our sales, marketing and educational activities, may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may constrain our business or financial arrangements and relationships.

The degree of market acceptance of YUTREPIA and Treprostinil Injection will depend on a number of factors, including: 

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Our business may also be impacted by the need to maintain compliant operations (including oversight and monitoring of personnel and our activities) in relation to interactions with the persons and parties noted above, relative to FDA and healthcare law requirements, and with consideration of government and industry compliance best practices.

Medical devices, which we do not control, are necessary for the administration of YUTREPIA, L606 and Treprostinil Injection.

In order for YUTREPIA, L606 or Treprostinil Injection to be administered to patients, patients must use certain other medical equipment, including dry powder inhalers (in the case of YUTREPIA), nebulizers (in the case of L606), and pumps, cartridges and infusion sets (in the case of Treprostinil Injection). We do not manufacture or control such

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medical equipment, which is manufactured by third parties. In addition, while we will distribute the necessary medical devices used for YUTREPIA and L606 in kits with our product, the medical devices for Treprostinil Injection are owned and dispensed by specialty pharmacies, hospitals or other third parties. Our ability to serve patients is dependent upon our ability and the ability of specialty pharmacies to maintain sufficient inventory of such medical equipment to provide to patients. If manufacturers cease to manufacture or support medical equipment or if we or specialty pharmacies are unable to obtain or maintain sufficient inventories of such medical equipment, our sales may be adversely impacted. If any manufacturers of such medical devices experience any quality problems, recalls or other adverse events, our ability to provide our products to patients will be limited.

We will require nebulizers in order to conduct clinical trials for L606. Failure by us or third parties to successfully supply nebulizers in sufficient quantities to meet the needs of our planned clinical trial could delay completion of the clinical trial or negatively impact the results of the clinical trial. In addition, the nebulizers we use in the clinical trials for L606 may not be the same as the nebulizers that will be included in our NDA for L606. Accordingly, our ability to seek and obtain final approval L606 will depend on our and our suppliers’ ability to timely and successfully identify and develop nebulizers that are suitable for commercialization of L606. If our partners are unable to timely and successfully identify and develop nebulizers that are suitable for the commercialization of L606, we may be required to seek out new nebulizers for use with L606. In any event, we may also be required to conduct bridging studies to demonstrate the comparability of any such nebulizer for which we may seek approval and the nebulizers that were used in the clinical studies for L606. If we are unable to demonstrate comparability, we may be required to perform new clinical studies to re-evaluate the safety and efficacy of L606 with such new nebulizers.

In addition, to administer Treprostinil Injection through subcutaneous injection, patients currently must use the CADD-MS 3 infusion pump manufactured by ICU Medical. ICU Medical no longer manufactures or supports the CADD-MS 3 infusion pump. Although we believe that the number of available CADD-MS 3 infusion pumps will be sufficient to serve patients through at least the end of 2026, it is possible that the availability of CADD-MS 3 infusion pumps could end earlier. Due to this limitation in the availability of pumps, specialty pharmacies will limit the number of patients that they place on subcutaneous Treprostinil Injection therapy in order to ensure that patients placed on subcutaneous administration of Treprostinil Injection will not have to discontinue such treatment due to the unavailability of CADD-MS3 infusion pumps. Until we and/or Sandoz are able to obtain a pump to replace the CADD-MS 3 infusion pump, if ever, the number of patients that can receive subcutaneous administration of Treprostinil Injection will continue to be constrained, which would continue to adversely affect sales of Treprostinil Injection.

We and/or Sandoz may seek to work with third parties to develop or procure other pumps that can be used to administer Treprostinil Injection in the future. Such pumps will require FDA 510(k) clearance before they can be sold. We or our partners may not receive FDA 510(k) clearance for any such pumps or, even if we or they receive FDA 510(k) clearance for any such pumps, that such clearance would be received in a timely manner. If we and/or Sandoz are unable to identify, develop and obtain any required FDA clearance for new pumps for the subcutaneous administration of Treprostinil Injection prior to the unavailability of the CADD-MS 3 infusion pump, we may no longer be able to serve patients with Treprostinil Injection through the subcutaneous route of administration.

Failure by us or third parties to successfully develop or supply the medical equipment or to obtain or maintain regulatory approval or clearance of such medical equipment could negatively impact the market acceptance of and sales of YUTREPIA and Treprostinil Injection.

Liquidia PAH does not hold the FDA regulatory approval for Treprostinil Injection and is dependent on Sandoz to manufacture and supply Treprostinil Injection in compliance with FDA requirements, and is more broadly dependent on their FDA and healthcare compliance relative to Treprostinil Injection. 

Sandoz holds the ANDA for Treprostinil Injection and is responsible among other things for the compliant manufacture, distribution, labeling, and advertising of Treprostinil Injection. As a result, we are dependent on Sandoz to manufacture and supply Treprostinil Injection, and are dependent on Sandoz for the continued FDA compliance of Treprostinil Injection. We do not have control over Sandoz’s compliance with laws and regulations applicable to drug manufacturers and ANDA holders (for example, applicable current good manufacturing practices, or cGMPs; FDA labeling, promotional labeling, and advertising requirements; pharmacovigilance and adverse event reporting; and other ongoing

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FDA reporting and submission requirements), nor over its compliance with healthcare compliance and fraud, waste, and abuse laws, or similar regulatory requirements and other laws and regulations, such as those related to environmental health and safety matters. In addition, we have no control over the ability of Sandoz to maintain adequate quality control, quality assurance and qualified personnel, or other personnel with roles related to the regulatory compliance of Treprostinil Injection and its labeling, promotion, and advertising or of Sandoz’s activities in relation to government healthcare programs. If the FDA or a comparable foreign regulatory authority finds deficiencies with the manufacture or quality assurance of Treprostinil Injection or identifies safety or efficacy concerns related to Treprostinil Injection, or if Sandoz otherwise is unable to comply with applicable laws, regulations and standards, Sandoz’s ability to manufacture, sell and supply Treprostinil Injection could be limited.

Sandoz’s ability to consistently manufacture and supply Treprostinil Injection in a timely manner may also be interrupted by production shortages or other supply interruptions. Our share of net profits under the Promotion Agreement is reduced by certain manufacturing costs and other write-offs related to Sandoz’s inability to sell Treprostinil Injection, including in the event that Treprostinil Injection expires prior to sale. Currently, Treprostinil Injection expires 24 months after the date of manufacture.

We maintain our cash at financial institutions, often in balances that exceed federally insured limits.

Our cash is held in non-interest-bearing and interest-bearing accounts at multiple financial institutions that may exceed the Federal Deposit Insurance Corporation insurance limits. If such financial institutions were to fail, we could lose all or a portion of those amounts held in excess of such insurance limitations. If financial institutions with whom we hold accounts enter receivership or become insolvent in the future in response to financial conditions affecting the banking system and financial markets or otherwise, our ability to access our existing cash may be threatened and could have a material adverse effect on our business, financial condition and results of operations. Even if account holders are ultimately made whole with respect to a future bank failure, account holders’ access to their accounts and assets held in their accounts may be substantially delayed. Any material loss that we may experience in the future or inability for a material time period to access our cash, cash equivalents, and restricted cash could have an adverse effect on our ability to pay our operational expenses or make other payments, which could adversely affect our business.

Risks Related to the Commercialization of our Products, Product Candidates and Generic Treprostinil Injection

United Therapeutics has initiated multiple lawsuits against us in which it has claimed that YUTREPIA is infringing its patents and two separate lawsuits against us that we and a former United Therapeutics employee, who later joined us as an employee, conspired to misappropriate certain trade secrets of United Therapeutics and engaged in unfair or deceptive trade practices and that United Therapeutics is entitled to an ownership interest in a portion of our intellectual property. These lawsuits, and other lawsuits that United Therapeutics may file in the future, may result in our company being unable to maintain FDA approval for YUTREPIA in PAH and/or PH-ILD, result in substantial damage claims against us if we are found to infringe any patents or to have misappropriated trade secrets, or result in United Therapeutics owning an interest in a portion of our intellectual property.

We developed YUTREPIA under the 505(b)(2) regulatory pathway with Tyvaso as the reference listed drug. Accordingly, under the Hatch-Waxman Amendments to the Food, Drug and Cosmetic Act, we were required to, in the NDA for YUTREPIA, certify that patents listed in the Orange Book for Tyvaso are invalid, unenforceable or will not be infringed by the manufacture, use or sale of YUTREPIA.

In connection with an amendment to our NDA filed in July 2023 to add PH-ILD as an indication for YUTREPIA, we provided a new notice of the paragraph IV certification to United Therapeutics as the owner of the patents that are the subject of the certification to which the NDA for YUTREPIA refers. As a result, in September 2023, United Therapeutics filed a complaint for patent infringement against us in the U.S. District Court for the District of Delaware (Case No. 1:23-cv-00975-RGA) (the “‘327 Patent Litigation”). In the ‘327 Patent Litigation, United Therapeutics is asserting that the Company infringes U.S. Patent No. 11,826,327 (the “‘327 Patent”), entitled “Treatment for Interstitial Lung Disease,” and is seeking injunctive relief that would require YUTREPIA to be removed from the market and monetary damages. Trial was held in June 2025. The outcome of the trial is uncertain, which creates risk regarding our ability to continue commercializing YUTREPIA, because an adverse decision could result in immediate injunctive or

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other relief, which could materially disrupt our business. In the event United Therapeutics prevails, the Court may order that the FDA withdraw its approval for YUTREPIA or that the PH-ILD indication be removed from YUTREPIA’s label. If the court issues an injunction or the FDA is required to withdraw approval for YUTREPIA due to the inclusion of PH-ILD on the label, we may be unable to market YUTREPIA for either indication at least until the label is successfully amended and reapproved. There is no assurance that the FDA will approve such an amendment in a timely manner, or at all, which could result in a prolonged interruption of YUTREPIA sales.

In addition, in May 2025, United Therapeutics filed a complaint for patent infringement against the Company in the U.S. District Court for the Middle District of North Carolina (Case No. 1:25CV368) (the “‘782 Patent Litigation”), asserting infringement by the Company of U.S. Patent No. 11,357,782, entitled “Treprostinil By Inhalation” (the “‘782 Patent”). In February 2024, United Therapeutics also filed a motion seeking a preliminary injunction to prevent the Company from manufacturing, marketing, storing, importing, distributing, offering for sale, and/or selling YUTREPIA. Judge Schroeder denied the motion for a preliminary injunction in May 2025. In the event United Therapeutics ultimately prevails in the ‘782 Patent Litigation, Liquidia could be enjoined from commercializing YUTREPIA in one or more indications or could be liable for damages. If an injunction is granted, we may be required to immediately cease all commercial activities related to YUTREPIA, which would have a material adverse effect on our business.

United Therapeutics may in the future seek to assert additional or newly issued patents against us, including U.S. Patent Number 11,723,887, and may seek to enjoin us from selling YUTREPIA for one or more indications through one or more additional legal proceedings.

If United Therapeutics is successful in any of its claims that it has brought to date or any claims it may bring in the future, we may be unable to commercialize YUTREPIA for the treatment of one or more indications or at all until the expiration of the applicable United Therapeutics patents, which could materially harm our business. For example, in the event United Therapeutics prevails with respect to its claims regarding the ‘327 Patent, it is possible that an injunction could be issued, forcing the FDA to withdraw the approval for YUTREPIA, at least until PH-ILD has been removed from the label, or restricting our ability to market and sell YUTREPIA for one or both indications for which it has been approved. In such event, we could be prevented from commercializing YUTREPIA for one or more indications for an extended time period.

In December 2021, United Therapeutics filed a complaint in the Superior Court in Durham County, North Carolina, alleging that we and a former United Therapeutics employee who later joined us as an employee many years after terminating his employment with United Therapeutics (the “Former Employee”) conspired to misappropriate certain trade secrets of United Therapeutics and engaged in unfair or deceptive trade practices. Both we and the Former Employee filed motions for summary judgment on all claims, but the motions were denied. In the event United Therapeutics prevails with respect to its trade secret claims, it could seek injunctive relief and substantial monetary damages.

In May 2024, United Therapeutics filed a second complaint in the Superior Court in Durham County, North Carolina, against the Former Employee, alleging that he breached prior employment agreements with United Therapeutics by failing to assign to United Therapeutics his interest in patents obtained by us that are alleged to have relied upon or benefitted from certain inventions, discoveries, materials, authorship, derivatives and results developed by the Former Employee while he was employed by United Therapeutics. We were also named as a defendant in this lawsuit. As part of the lawsuit, United Therapeutics alleges that the Former Employee misappropriated certain intellectual property of United Therapeutics which led to the development of YUTREPIA. The complaint also seeks declaratory judgement such that all right, title and interest in and to any patentable or unpatentable inventions, discoveries, and ideas made or conceived by the Former Employee while employed by us should be assigned and transferred to United Therapeutics because they allegedly involved the use of United Therapeutics’ confidential information. In July 2024, we filed a motion to dismiss all claims. The motion was denied in May 2025. The lawsuit remains ongoing. If United Therapeutics prevails with respect to its breach of contract claims, we could be required to assign an interest in certain of our intellectual property, including our ‘494 patent, to United Therapeutics, in which case we would not be able to prevent United Therapeutics from practicing our proprietary methods.

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Success in a lawsuit, including in any lawsuit with respect to some patents or some claims in a given patent, does not mean that we will be similarly successful upon appeal of those decisions. In addition, success in one proceeding, including with respect to a given patent, patent claim or trade secret, does not mean we will be similarly successful with respect to that same or a similar patent, patent claim or trade secret in another proceeding.

If we are found to infringe, misappropriate or otherwise violate any of United Therapeutics’ intellectual property rights, we could be required to obtain a license from United Therapeutics to continue developing and marketing YUTREPIA. However, we may not be able to obtain any required license on commercially reasonable terms or at all. We could be found liable for monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a patent or to have misappropriated a trade secret of United Therapeutics. In addition, we may be forced to refrain from promoting YUTREPIA for one or more indications, or altogether, until the applicable patent(s) expire.

We face significant competition from large pharmaceutical companies, among others, in developing and commercializing our products and product candidates, and our operating results will suffer if we are unable to compete effectively, including if one or more such products have a superior product profile to YUTREPIA and/or L606.

We face significant competition from industry players worldwide, including large multi-national pharmaceutical companies, other emerging or smaller pharmaceutical companies, as well as universities and other research institutions. Many of our competitors have substantially greater financial, technical and other resources, such as a larger research and development staff and more experience in manufacturing and marketing, than we do. As a result, these companies may obtain marketing approval for their product candidates more quickly than we are able to and/or be more successful in commercializing their products, including generic treprostinil products, than us. Smaller or early-stage companies may also prove to be significant competitors, particularly through collaboration arrangements with large, established companies. We may also face competition as a result of advances in the commercial applicability of new technologies and greater availability of capital for investment in such technologies. Our competitors may also invest heavily in the discovery and development of novel drug products that could make our product candidates less competitive or may file FDA citizen petitions or other correspondence with the FDA, which may delay the approval process for our product candidates. Furthermore, our competitors may succeed in developing, acquiring or licensing, on an exclusive basis, pharmaceutical products that are easier to develop, more effective or less costly than any product candidates that we are currently developing or that we may develop. Our competitors may also succeed in asserting existing patents or developing new patents, including patents that may issue from patent applications that are currently being pursued by United Therapeutics, to which we do not have a license, in an attempt to prevent us from marketing our products. These competitors may also compete with us in recruiting and retaining qualified sales personnel or in enrolling our clinical studies.

Any new drug product that competes with a prior approved drug product must demonstrate advantages in safety, efficacy, tolerability or convenience in order to overcome price competition and to be commercially successful. YUTREPIA faces, and our product candidates if approved will face, competition from drug products that are already on the market, as well as those in our competitors’ development pipelines. We expect that YUTREPIA, an inhaled treprostinil therapy for the treatment of PAH and PH-ILD, and L606, a nebulized, liposomal formulation of treprostinil for treatment of PAH and PH-ILD, will face competition from the following inhaled prostacyclin analog therapies that are either currently marketed or in clinical development:

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In addition to these other inhaled treprostinil therapies, we expect that YUTREPIA and L606 will also face competition from other treprostinil-based drugs, including Orenitram, which is administered orally, and Remodulin, which is administered parenterally, both of which are marketed by United Therapeutics. Branded pharmaceutical companies such as United Therapeutics continue to defend their products vigorously through, among other actions, life cycle management, marketing agreements with third-party payors, pharmacy benefits managers and generic manufacturers. These actions add increased competition in the generic pharmaceutical industry, including competition for Treprostinil Injection.

Additionally, even though Sandoz launched the first-to-file fully substitutable generic treprostinil for parenteral administration in March 2019 that is sold primarily through specialty pharmacies, Teva Pharmaceutical Industries Ltd. launched a generic treprostinil for parenteral administration in October 2019 that is sold primarily through specialty pharmacies and to hospitals, Par Pharmaceutical, Inc. launched a generic treprostinil for parenteral administration after receiving approval in September 2019 that is sold primarily to hospitals, Dr. Reddy’s Laboratories Inc. launched a generic treprostinil for parenteral administration in April 2023, and Alembic received approval in February 2021 for generic treprostinil for parenteral administration. Such increased competition may result in a smaller than expected commercial opportunity for us.

Generic drug prices may, and often do, decline, sometimes dramatically, especially as additional generic pharmaceutical companies (including low-cost generic producers outside of the United States) receive approvals and enter the market for a given product. The goals established under the Generic Drug User Fee Act, and increased funding of the FDA’s Office of Generic Drugs, have led to more and faster generic approvals, and consequently increased competition for generic products. The FDA has stated that it has established new steps to enhance competition, promote access and lower drug prices and is approving record-breaking numbers of generic applications. The FDA’s changes may benefit our competitors. Our ability to sell Treprostinil Injection and earn revenue is affected by the number of companies selling competitive products, including new market entrants, and the timing of their approvals.

In addition to treprostinil-based therapies, other classes of therapeutic agents for the treatment of PAH and/or PH-ILD include the following:

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Merck & Co’s injectable sotatercept, with a brand name of Winrevair, was approved by the FDA in March 2024 and is a first-in-class molecule that targets the proliferation of cells in the pulmonary arterial wall. Its clinical use is developing, and it is possible that it may be used prior to prostacyclin therapies, which may have an adverse effect on the market potential for YUTREPIA and/or L606.

We are also aware of several other agents in clinical development that are exploring mechanisms of action which, if approved, could impact the standard of care for treating PAH and/or PH-ILD in the United States, including, but not limited to, programs from Gossamer Bio, Inc., Cereno Scientific, Novartis AG, Inhibikase, and Forsee Pharmaceuticals among others.

We plan to evaluate inhaled treprostinil in indications beyond PAH and PH-ILD, including IPF, PPF, SSc-RP and PH-COPD. Expansion into these indications will expose us to additional risks and uncertainties, including increased competition from approved therapies and product development candidates, evolving standards of care, and shifting regulatory or reimbursement landscapes. Due to competitive pressures, we may elect to delay, scale back or discontinue one or more of these development programs.

There are a number of competitors seeking marketing approval and/or regulatory exclusivity with respect to products that are or would be competitive to L606 or products that are or would be competitive with YUTREPIA in the new indications that we are developing. Thus, we face the risk that one of our competitors will be granted marketing approval and/or regulatory exclusivity before we are able to obtain FDA approval for L606 or for such new indications for YUTREPIA. In that case, as stated above, there is the possibility that such a competitor would be able to prevent us from obtaining approval of and marketing our product candidate until the expiration of the competitor’s term of FDA regulatory exclusivity, which could be a term of three years for so-called New Clinical Investigation exclusivity, or could conceivably be for longer periods of time if the competitor is successful in being granted other forms of FDA regulatory exclusivity which might include, for example, Orphan Disease Designation exclusivity (seven years), New Chemical Entity exclusivity (five years), or Pediatric exclusivity (six months beyond other existing exclusivities or patent terms).

In addition, if one of our competitors is granted marketing approval before we are able to obtain FDA approval for our product candidates, as was the case with respect to the approval of United Therapeutics’ Tyvaso DPI product, such competitors will be able to promote and market their products before we are able to do so, which may place us at a competitive disadvantage in the marketplace.

One or more products that are competitive with YUTREPIA could also obtain approval for additional indications or broader conditions of use. These additional indications and broader conditions of use could be protected by one or more patents or regulatory exclusivities, preventing YUTREPIA from obtaining approval for the same indications or conditions of use. For instance, if FDA withdraws its approval for YUTREPIA, at least until PH-ILD is removed from its label, in connection with the patent litigation related to the ‘327 patent, Tyvaso and Tyvaso DPI would have broader labels than YUTREPIA. In addition, United Therapeutics is currently studying Tyvaso for the treatment of idiopathic pulmonary fibrosis, an indication for which it has received an orphan drug designation. Thus, such competitive products could have a broader label than the initial label for YUTREPIA. If YUTREPIA has a narrower label than other competitive products, it may affect our ability to compete with such products.

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Also, if we are unable to provide continuous access to YUTREPIA to patients, our reputation and ability to compete with our competitors may be impaired. For example, if United Therapeutics prevails in the ‘327 Patent Litigation and we are required to withdraw YUTREPIA from the market, at least until PH-ILD is removed from the label, YUTREPIA may be unavailable until the FDA has approved a change to its label. In addition, if we are unable to manufacture sufficient quantities of YUTREPIA to meet future market demand, YUTREPIA may be unavailable until we are able to increase our capacity. Any such unavailability of YUTREPIA, even if for a brief time period, could have a material adverse effect on our business.

The ability of competitors to utilize other regulatory incentive programs could also expedite their FDA review and approval timeline, which could result in their products reaching the market before our product candidate, and which could create further potential implications on exclusivity as noted above. For example, when a Priority Review Voucher is redeemed in connection with an NDA, the FDA’s goal review period would generally be expedited to six months, although this timeframe is not guaranteed.

If we are unable to maintain our competitive position, our business and prospects will be materially and adversely affected.

If the FDA or comparable regulatory authorities in other countries approve generic versions of our product candidates, or do not grant our product candidates a sufficient period of market exclusivity before approving their generic versions, our ability to generate revenue may be adversely affected.

Once an NDA is approved, the drug product covered will be listed as a reference listed drug in the FDA’s Orange Book. In the United States, manufacturers of drug products may seek approval of generic versions of reference listed drugs through the submission of ANDAs. Following the introduction of a generic drug product, a significant percentage of the sales of any reference listed drug may be lost to the generic drug product. In support of an ANDA, a generic manufacturer is generally required to show that its product has the same active pharmaceutical ingredient(s), dosage form, strength, route of administration and conditions of use or labeling as the reference listed drug and that the generic version is bioequivalent to the reference listed drug. Generic drug products may be significantly less expensive to bring to market than the reference listed drug, and companies that produce generic drug products are generally able to offer them at lower prices. Because generic manufacturers need samples of a reference listed drug to conduct certain comparative testing required by the FDA, some have attributed the inability to timely obtain samples as a cause of delay in the entry of generic products.

The Creating and Restoring Equal Access to Equivalent Samples Act (the “CREATES Act”) was enacted in 2019, which requires brand manufacturers of approved drugs to provide sufficient quantities of product samples on commercially reasonable, market-based terms to generic manufacturers. The CREATES Act establishes a private right of action allowing generic manufacturers to sue brand manufacturers that refuse to sell them product samples needed to support their applications. If we are required to provide product samples or allocate additional resources to respond to such requests or any legal challenges under the CREATES Act, our business could be adversely impacted.

The FDA will not approve an ANDA for a generic drug product until the applicable period of market exclusivity for the reference listed drug has expired. The applicable period of market exclusivity varies depending on the type of exclusivity granted. A grant of market exclusivity is separate from the existence of patent protection and manufacturers may seek to launch generic versions of our drug products following the expiration of their respective marketing exclusivity periods, even if our drug products are still under patent protection at the relevant time.

Any competition that YUTREPIA or our product candidates may face, if and when such product candidates are approved for marketing and commercialized, from generic versions could substantially limit our ability to realize a return on our investment in the development of our product candidates and have a material and adverse effect on our business and prospects.

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Our products may not achieve market acceptance or adequate third-party payor coverage.

We are currently focused on developing drug products that can be approved under abbreviated regulatory pathways in the United States, such as the 505(b)(2) regulatory pathway, which allows us to rely on existing knowledge of the safety and efficacy of the relevant reference listed drugs to support our applications for approval in the United States. While we believe that it will be less difficult for us to convince physicians, patients and other members of the medical community to accept and use our drug products as compared to entirely new drugs, our drug products may nonetheless fail to gain sufficient market acceptance by physicians, patients, other healthcare providers and third-party payors. If any of our drug products fail to achieve sufficient market acceptance or third-party payor coverage, we may not be able to continue to generate sufficient revenue to sustain profitability. The degree of market acceptance and third-party payor coverage of our drug products, including YUTREPIA, will depend on a number of factors, including but not limited to:

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If our drug products fail to receive a sufficient level of market acceptance or sufficient third-party payor coverage, our ability to generate revenue from sales of our drug products will be limited, and our business and results of operations may be materially and adversely affected.

We may not be able to scale or maintain our commercial operation, including scaling and maintaining marketing and sales capabilities or entering into agreements with third parties to market and sell our drug products.

In order to market and sell any of our drug products, including YUTREPIA, we will be required to build and maintain our marketing and sales capabilities with respect to such products. With the acquisition of Liquidia PAH, we acquired a commercial field force to market generic treprostinil in accordance with the Promotion Agreement. In addition, during 2023, we significantly increased the size of our commercial field force in anticipation of our commercialization of YUTREPIA. However, we may be unable to retain or scale our commercial field force sufficiently to adequately promote YUTREPIA. We may face significant competition in recruiting and retaining our sales personnel. Moreover, we cannot assure you that we will be successful in further building or effectively managing our marketing and sales capabilities or be able to do so in a cost-effective manner. In addition, we may enter into collaboration arrangements with third parties to market our drug products. We may face significant competition for collaborators. In addition, collaboration arrangements may be time-consuming to negotiate and document. We cannot assure you that we will be able to negotiate collaborations for the marketing and sales of our drug products on acceptable terms, or at all. Even if we do enter into such collaborations, we cannot assure you that our collaborators will be successful in commercializing our products. If we or our collaborators are unable to successfully commercialize our drug products, whether in the United States or elsewhere, our business and results of operations may be materially and adversely affected.

As we seek to expand our commercial operation with respect to YUTREPIA, we also continue to evaluate and develop additional drug candidates, including L606, and new indications for our approved products, including YUTREPIA. There can be no assurance that we will be able to successfully manage the balance of our research and development operations with our commercial activities. Potential investors should be aware of the problems, delays, expenses and difficulties frequently encountered by companies balancing development of product candidates, which can include

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problems such as unanticipated issues relating to clinical trials and receipt of approvals from the FDA and foreign regulatory bodies, with commercialization efforts, which include problems relating to managing manufacturing and supply, reimbursement, marketing problems, and other additional costs.

There are risks involved with expanding and maintaining our sales, marketing, and other commercialization capabilities. For example, recruiting and training a commercial field force is expensive and time-consuming.

Factors that may impact our efforts to commercialize our drug candidates on our own and generate product revenues include:

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In the future, we may choose to participate in sales activities with collaborators for some of our drug candidates. However, there are also risks with entering into these types of arrangements with third parties to perform sales, marketing and distribution services. For example, we may not be able to enter into such arrangements on terms that are favorable to us. Our drug revenues or the profitability of these drug revenues to us are likely to be lower than if we were to market and sell any drug candidates that we develop ourselves. In addition, we likely will have little control over such third parties, and any of them may fail to devote the necessary resources and attention to sell and market our drug candidates effectively. If we do not establish sales and marketing capabilities successfully, either on our own or in collaboration with third parties, we will not be successful in commercializing our drug candidates. Further, our business, results of operations, financial condition and prospects will be materially adversely affected.

Forecasting and accounting for YUTREPIA product sales requires us to make numerous assumptions and, if our estimates are inaccurate, our business may be harmed and our share price may be adversely affected.

Our business planning requires us to forecast or make assumptions regarding product demand and revenues for YUTREPIA, despite numerous uncertainties. Actual demand and revenue may differ materially from projected demand and revenue for various reasons, including the following, as well as risks identified in other risk factors:

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Our results of operations could be materially harmed if we are unable to accurately forecast customer demand for YUTREPIA and manage our inventory. To ensure adequate inventory supply, we must forecast inventory needs and place orders with our suppliers based on our estimates of future demand for YUTREPIA. We seek to maintain sufficient levels of inventory to protect ourselves from supply interruptions. As a result, we are subject to the risk that a portion of our inventory will become obsolete or expire, which could have a material adverse effect on our earnings and cash flows due to the resulting costs associated with the inventory impairment charges and costs required to replace such inventory.

In addition, we expect that our revenues from sales of YUTREPIA will be based in part on estimates, judgment and accounting policies. Any incorrect estimates or disagreements with regulators or others regarding such estimates, judgment or accounting policies may result in changes to our guidance, projections or previously reported results. Expected and actual product sales and quarterly and other results may greatly fluctuate, including in the near-term, and such fluctuations can adversely affect the price of our common stock, perceptions of our ability to forecast demand and revenues, and our ability to maintain and fund our operations. The metrics that we are tracking in order to evaluate the success of our sales efforts may not correlate to commercial success.

We may be exposed to claims and may not be able to obtain or maintain adequate product liability insurance.

Our business is exposed to the risk of product liability and other liability risks that are inherent in the development, manufacture, clinical testing, commercialization and marketing of pharmaceutical products. These risks exist even if a product is approved for commercial sale by the FDA or comparable regulatory authorities in other countries and manufactured in licensed facilities. Our current products and product candidates, YUTREPIA and L606, and Treprostinil Injection are designed to affect important bodily functions and processes. Any side effects, manufacturing defects, misuse or abuse associated with our products could result in injury to a patient or even death.

Claims that are successfully brought against us could have a material and adverse effect on our financial condition and results of operations. Further, even if we are successful in defending claims brought against us, our reputation could suffer. Regardless of merit or eventual outcome, product liability claims may also result in, among others:

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Our insurance may not provide adequate coverage against our potential liabilities. Furthermore, we, our collaborators or our licensees may not be able to obtain or maintain insurance on acceptable terms, or at all. Our inability to obtain sufficient product liability insurance at an acceptable cost and/or scope of coverage to protect against potential product liability claims could prevent or inhibit the commercialization of products we develop, alone or with our collaborators. The market for insurance coverage is increasingly expensive, and the costs of insurance coverage will increase as our clinical programs and commercialization efforts increase in size. In addition, our collaborators or licensees may not be willing to indemnify us against these types of liabilities and may not themselves be sufficiently insured or have sufficient assets to satisfy any product liability claims. To the extent that they are uninsured or uninsurable, claims or losses that may be suffered by us, our collaborators or our licensees may have a material and adverse effect on our financial condition and results of operations.

Any claims against us, regardless of their merit, could severely harm our financial condition, strain our management and other resources, adversely affect or eliminate the prospects for commercialization or sales of a product that is the subject of any such claim, and could have a material adverse effect on our business, financial condition, results of operations, and growth prospects.

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Our business and operations may be adversely affected by the effects of public health emergencies, including pandemics and epidemics.

Our business and operations could be adversely affected by public health emergencies, including pandemics and epidemics, in regions where we have offices, manufacturing facilities, clinical trial sites or other business operations, and could cause significant disruption in the operations of clinical trial sites, CMOs or suppliers and contract research organizations (“CROs”) upon whom we rely.

The extent to which such public health emergencies impact our business and operations, including our clinical development and regulatory efforts, will depend on future developments that are highly uncertain and cannot be predicted with confidence at the time of this Annual Report on Form 10-K, such as the severity and duration of outbreaks, the duration and effect of business disruptions and the administration, availability and efficacy of vaccination programs or other treatments and the effects of any travel restrictions, quarantines, social distancing requirements and business closures in the United States and other countries to contain and treat any such public health emergencies. These impacts could adversely affect our business, financial condition, results of operations and growth prospects.

In addition, to the extent any public health emergencies adversely affect our business and results of operations, it may also have the effect of heightening many of the other risks and uncertainties described in this “Risk Factors” section and the “Risk Factors” sections of the documents incorporated by reference herein.

We are currently operating in a period of global economic uncertainty and capital markets disruption, which has been significantly impacted by geopolitical instability. Changes and instability in global economic conditions and geopolitical matters could have a material adverse effect on our business, financial condition and results of operations.

The United States and global markets are experiencing and may in the future experience volatility and disruption, including diminished liquidity and credit availability, declines in consumer confidence, declines in economic growth, high inflation and interest rates, increases in unemployment rates and uncertainty about economic stability. The financial markets and the global economy may also be adversely affected by the current or anticipated impact of geopolitical conflicts, including in Russia and Ukraine, the Middle East, South America and other areas, terrorism or other events. Sanctions, tariffs and enhanced export controls imposed by the United States and other countries, including those focusing on national security-related technologies, including biotechnology, may also adversely impact the financial markets and the global economy, and any economic countermeasures by the affected countries or others could exacerbate market and economic instability.

Changes in regulations and policies in the United States and the resulting political and economic uncertainty inside and outside the United States may also impact us, the financial markets and the global economy. The U.S. has imposed increased tariffs on certain countries. Other countries have responded, and may continue to respond, by announcing retaliatory tariffs on U.S. imports. In addition, the U.S. Department of Commerce has initiated national security investigations into the importation of pharmaceuticals and pharmaceutical ingredients pursuant to Section 232 of the Trade Expansion Act of 1962, which could result in the imposition of new tariffs on imports within the pharmaceutical industry. Further, the U.S. announced a 100% tariff, on any branded or patented pharmaceuticals imported into the U.S. from drug manufacturers that do not have, or is not in the process of building, a manufacturing facility in the U.S., which has been delayed as negotiations with large drug manufacturers continue. The terms and effects of such tariffs, if and as they are implemented, and other policy changes are uncertain and could have adverse implications on drug pricing, drug production levels and patient access, and may result in supply chain or other operational disruptions. If we are required to change our current manufacturing partners or suppliers now or in the future in order to avoid such tariffs, the terms of new agreements that we may enter into may not be favorable to us and related operational disruptions may heighten manufacturing and compliance risks and derail commercialization plans.

The tariffs have disrupted, and may continue to disrupt, the global markets and escalate tensions between the U.S. and other countries. We procure APIs, medical devices and other raw materials from suppliers in South Korea, Taiwan, China, Italy and elsewhere. In addition, Sandoz currently procures treprostinil from a production facility in Canada. Tariffs imposed on or by one or more of these jurisdictions may increase our costs. The extent of the impact that such

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tariffs, trade policies, or new legislation or regulations will have on our business specifically, or on the U.S. market and global economy generally, are uncertain and in the long term, unpredictable, and could adversely affect our business, financial condition, and results of operations. In addition, the increased tariffs could impact our ability to commercialize future drug candidates for the U.S. market, which is relevant to our ability to generate future revenues from these activities. As a result, the continued impact of these tariffs may impair our plans for further drug development in the U.S. market as well as our ability to generate revenues.

The United States has also enacted regulations or policies that affect trade or otherwise impact the pharmaceutical industry by restricting U.S. pharmaceutical companies from contracting with certain countries for the development, research or manufacturing of pharmaceutical products. In December 2025, the BIOSECURE Act was signed into law as part of the National Defense Authorization Act, which restricts U.S. government agencies from purchasing or obtaining certain biotechnology equipment or services from “biotechnology companies of concern” (“BCC”); entering, extending or renewing a contract with any entity using biotechnology equipment or services provided by a BCC to perform a government contract; or granting government funds or loans for such biotechnology equipment or services provided by a BCC. While we do not currently anticipate any material impact from the BIOSECURE Act, it may have significant implications for U.S. companies with government contracts that obtain biotechnology equipment or services from a BCC, including contracts with the Department of Veterans Affairs, and any related impact on reimbursement under Medicaid and Medicare Part B.

Further, executive orders were signed to implement Most Favored Nation drug pricing policies designed to align certain prescription drug prices in the U.S. to lower prices available in other countries. Investigations are being conducted to examine price differentials and consider policy approaches for implementation, including through administrative action. If such Most Favored Nation policies are implemented, changes to drug pricing are expected to affect the profitability of pharmaceutical and biotech companies in the U.S. as well as in other countries, as a price referencing policy to the U.S. market could make it commercially unviable to commercialize a drug product in a price constrained market. The details of the proposed policies are unclear and the final terms and impact remain uncertain, and may pose long-term risks to our business and our future commercialization plans of YUTREPIA and our other drug candidates.

Any executive order, legislative action or potential sanctions on certain countries could materially impact our current manufacturing partners. See Risk Factors—Risks Related to Our Dependence on Third Parties—We depend on third parties for clinical and commercial supplies, including single suppliers for the active ingredient, the device, encapsulation and packaging of YUTREPIA and single suppliers for the drug product and device for L606. In the event of any disruption in these supplies, our ability to develop and commercialize, and the timeline for commercialization of, YUTREPIA and/or L606 may be adversely affected. In addition, natural and man-made disasters and global health emergencies, including pandemics and epidemics, may also adversely affect the financial markets and the global economy and result in significant business disruption. See Risk Factors—Risks Related to the Manufacturing of our Products and Product Candidates—Our operations are concentrated in Morrisville, North Carolina and interruptions affecting us or our suppliers due to natural or man-made disasters or other unforeseen events could materially and adversely affect our operations and result in losses that may not be covered by insurance.

The volatile business environment or continued unpredictable and unstable market conditions may result in further deterioration of the equity and credit markets, significant volatility in commodity prices, as well as supply chain interruptions and result in an economic downturn, which would make any equity or debt financing more difficult, costly and dilutive. Failure to secure any necessary financing in a timely manner and on favorable terms could have a material adverse effect on our growth strategy, financial performance and stock price and could require us to delay, limit, reduce, or terminate our product development or future commercialization efforts.

Although our business has not been materially impacted by the tariffs or regulatory changes adopted to date or adverse effects of geopolitical events, natural or man-made disasters or other business disruptions, such matters may affect our business in the future and it is impossible to predict the extent to which our operations, or those of our suppliers and manufacturers, will be impacted in the short and long term, or the ways in which such matters may impact our business. The extent and duration of such adverse geopolitical events, natural or man-made disasters or other business disruptions and actual or perceived political or economic instability and resulting market disruptions are impossible to predict but could be substantial. Any such disruptions may also magnify the impact of other risks described herein.

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The political and economic environment in the United States could materially impact our business operations and financial performance, and uncertainty surrounding the potential legal, regulatory and policy changes by the United States may directly affect us and the global economy.

The political and economic environment in the United States and elsewhere has resulted in and will continue to result in some uncertainty. Changing regulatory policies because of the changing political environment could impact our regulatory and compliance costs and future revenues, all of which could materially and adversely affect our business, financial condition and operating results. For example, government shutdowns, significant layoffs or turnover at FDA could affect the FDA’s ability to respond to regulatory filings in a timely manner, which could result in delays in our obtaining necessary approvals. See Risk Factors—Risks Related to the Development and Regulatory Approval of our Product Candidates—Disruptions at the FDA, the SEC and other government agencies caused by funding shortages, government shutdowns, layoffs or global health emergencies or their inability to hire, retain or deploy key leadership and other personnel, could prevent new or modified products from being developed, approved or commercialized in a timely manner or at all or otherwise prevent those agencies from performing normal business functions on which the operation of our business may rely, which could negatively impact our operations. Failure to adapt to or comply with evolving regulatory requirements or investor or stakeholder expectations and standards could negatively impact our reputation, ability to do business with certain partners, access to capital and our stock price.

Further, the political environment in the United States may result in increased regulatory and economic uncertainty. Changes in federal policy by the executive branch and regulatory agencies may occur over time through the administration’s and/or Congress’s policy and personnel changes, which could lead to changes involving the level of oversight and focus on the pharmaceutical industry; however, the nature, timing and economic and political effects of such potential changes remain highly uncertain. Any future changes in federal and state laws and regulations, as well as the interpretation and implementation of such laws and regulations, could affect us in substantial and unpredictable ways. At this time, it is unclear what laws, regulations and policies may change and whether future changes or uncertainty surrounding future changes will adversely affect our operating environment and therefore our business, financial condition and results of operations.

Risks Related to the Development and Regulatory Approval of our Products and Product Candidates

We are primarily dependent on the success of YUTREPIA, for which we recently received FDA approval, and L606, and these products and product candidates may fail to receive or to maintain marketing approval (in a timely manner or at all) for some or all of the indications for which we have received or are seeking approval or may not be commercialized successfully.

Our ability to generate revenue from sales of our own products, such as YUTREPIA, and to achieve sustained profitability depend on our ability, alone or with strategic collaboration partners, to successfully complete the development of, and obtain and maintain the regulatory and marketing approvals necessary to commercialize, our product, YUTREPIA, and one or more of our other product candidates. We expect that a substantial portion of our efforts and expenditure over the next few years will be devoted to expanding the labelled indications for YUTREPIA and to seek approval for our product candidate, L606, a nebulized, liposomal formulation of treprostinil for treatment of PAH and PH-ILD.

United Therapeutics invested considerable time and resources to delay the approval and commercialization of YUTREPIA, and our ability to maintain regulatory approval for YUTREPIA for one or more indications is impacted by ongoing litigation following lawsuits filed by United Therapeutics. For instance, in connection with an amendment to our NDA filed in July 2023 to add PH-ILD as an indication for YUTREPIA, United Therapeutics filed the ‘327 Patent Litigation, in which United Therapeutics is seeking an injunction to require that YUTREPIA be withdrawn from the market and to prevent us from manufacturing, marketing, storing, importing, distributing, offering for sale, and/or selling YUTREPIA for the treatment of both PAH and PH-ILD. In addition, in May 2025, United Therapeutics filed the ’782 Patent Litigation, in which United Therapeutics is seeking to enjoin us from commercializing YUTREPIA and monetary damages. If United Therapeutics is successful in either the ‘327 Patent Litigation or the ‘782 Patent Litigation, we may be unable to maintain approval for, or to successfully commercialize, YUTREPIA.

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Expectations for YUTREPIA and/or L606 also may be impacted by competing products, including Tyvaso DPI. See Risk Factors – We face significant competition from large pharmaceutical companies, among others, in developing our products and in gaining regulatory approval to bring them to market in time to achieve commercial success, and our operating results will suffer if we are unable to compete effectively.

We cannot assure you that we will be able to maintain marketing approval for YUTREPIA, that we will receive approval for any new indications for YUTREPIA or that we will receive marketing approval for L606. Even if we do maintain marketing approval for YUTREPIA, receive approval for additional indications for YUTREPIA or receive final marketing approval for L606, we cannot provide assurance regarding the indications for which they will receive or maintain approval. For YUTREPIA, the FDA may be required by the Court in the ‘327 Patent Litigation to withdraw approval for YUTREPIA, at least until PH-ILD is removed from its label. In addition, the FDA may delay, limit or deny approval for changes to the manufacturing process or other changes to YUTREPIA that may be necessary in order for us to continue to supply YUTREPIA, including any requirement to remove PH-ILD from the label for YUTREPIA. In the event of an adverse court ruling or regulatory action, we may be required to make changes to the YUTREPIA product label in order to comply with legal or regulatory requirements. The FDA may delay, limit, or deny approval of any such changes, including amendments to separate indications, and any delay or failure to obtain timely FDA approval for required changes could prevent us from resuming or continuing the commercialization of YUTREPIA, resulting in a material adverse impact on our business. With respect to L606 and new indications for YUTREPIA, the FDA or comparable regulatory authorities in other countries may delay, limit or deny final approval of our product candidate for various reasons. For example, such authorities may disagree with the design, scope or implementation of our clinical trials, or with our interpretation of data from our preclinical studies or clinical trials. Further, there are numerous FDA personnel assigned to review different aspects of an NDA or any amendments or supplements to an NDA, both before and after approval, and there may be turnover and/or vacancies at the FDA, which may delay review of our NDAs or any changes. In addition, uncertainties can be presented by the ability of FDA personnel, including any new FDA personnel who have not previously reviewed our NDA, to exercise judgment and discretion during the review process. During the course of review prior to approval, the FDA may request or require additional preclinical, clinical, CMC or other data and information or conduct additional inspections. If any additional issues were identified in such information requests or inspections or if FDA determines that we failed to include required CMC information in the NDA or other submissions for our products, including YUTREPIA, we may be delayed in obtaining approval for such NDA or submission. Furthermore, responses to FDA’s requests may be time-consuming and expensive. Status as a combination product, as is the case for YUTREPIA and L606, may complicate or delay the FDA review process. Products and product candidates that the FDA deems to be combination products, such as YUTREPIA and L606, or that otherwise rely on innovative drug delivery systems, may face additional challenges, risks and delays in the product development and regulatory approval process. Moreover, the applicable requirements for approval may differ from country to country. Additionally, if the court in either the ‘327 Litigation or the ‘782 Litigation enjoins Liquidia from commercializing YUTREPIA in one or more indication, such ruling could prevent or delay our ability to continue to commercialize YUTREPIA.

We cannot assure you that YUTREPIA or, if approved, L606 will be commercialized in a timely manner or successfully. For example, such products may not achieve a sufficient level of market acceptance or third-party payor coverage, or we may not be able to effectively build or scale our marketing and sales capabilities or scale our manufacturing operations to meet commercial demand. The successful commercialization of YUTREPIA and L606 will also, in part, depend on factors that are beyond our control. Therefore, we may not be able to generate sustained revenue from the sale of such products. Any delay or setback we face in the commercialization of YUTREPIA and/or L606 may have a material and adverse effect on our business and prospects, which will adversely affect your investment in our company.

Our preclinical studies and clinical trials, including our planned clinical trials in new indications for YUTREPIA and pivotal clinical trial of L606, may not be successful and delays in such preclinical studies or clinical trials may cause our costs to increase and significantly impair our ability to commercialize our product candidates. Results of previous clinical trials or interim results of ongoing clinical trials may not be predictive of future results.

Before we are able to commercialize our drug products, we are required to undertake extensive preclinical studies and clinical trials to demonstrate that our drug products are safe and effective for their intended uses. However, we cannot assure you that our drug products will, in preclinical studies and clinical trials, demonstrate safety and efficacy as

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necessary to obtain marketing approval. Due to the nature of drug product development, many product candidates, especially those in early stages of development, may be terminated during development. YUTREPIA has been studied only for the treatment of PAH and PH-ILD, and L606 has, to date, been tested only in a relatively small study population. Results from prior clinical trials in PAH and PH-ILD for YUTREPIA may not be predictive of results in planned clinical studies for the treatment of new indications. Moreover, the results from smaller clinical trials, such as our ongoing clinical trial in L606, may be less reliable than results achieved in larger clinical trials. Additionally, the outcome of preclinical testing and early clinical trials may not be predictive of the success of later clinical trials, and preliminary and interim results of a clinical trial do not necessarily predict final results.

Preclinical studies and clinical trials may fail due to factors such as flaws in trial design, dose selection, patient enrollment criteria and demographics of enrolled patients. The results of preclinical studies and early clinical trials may not be indicative of the results of subsequent clinical trials. Product candidates may, in later stages of clinical testing, fail to show the desired safety and efficacy traits despite having progressed through preclinical studies and earlier clinical trials. Moreover, there may be significant variability in safety or efficacy results between different trials of the same product candidate due to factors including, but not limited to, changes in trial protocols, differences in the composition of the patient population, adherence to the dosing regimen and other trial protocols and amendments to protocols and the rate of drop-out among patients in a clinical trial. If our preclinical studies or clinical trials are not successful and we are unable to bring our product candidates to market as a result for the indications studied, or at all, our business and prospects may be materially and adversely affected.

Furthermore, conducting preclinical studies and clinical trials is a costly and time-consuming process. The length of time required to prepare for and conduct the required studies and trials may vary substantially according to the type, complexity, novelty and intended use of the product candidate. A single clinical trial may take up to several years to complete. Moreover, our preclinical studies and clinical trials may be delayed or halted due to various factors, including, among others:

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If our preclinical studies or clinical trials are delayed, the commercialization of our approved products in new indications and our product candidates will be delayed and, as a result, we may incur substantial additional costs or not be able to recoup our investment in the development of our products and product candidates, which would have a material and adverse effect on our business.

Clinical trials and data analysis can be expensive, time-consuming and difficult to design and implement. If we are unsuccessful in obtaining regulatory approval for any of our products or product candidates for the indications studied, or any required clinical studies of our products do not provide positive results, we may be required to delay or abandon development of such products or indications, which would have a material adverse impact on our business.

Continuing product development requires additional and extensive clinical testing. Human clinical trials are very expensive and difficult to design and implement, in part because they are subject to rigorous regulatory requirements.

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The clinical trial process is also time-consuming. We cannot provide any assurance or certainty regarding whether or when we might receive regulatory approval for any additional indications for YUTREPIA or our other product candidates, including L606. Furthermore, failure can occur at any stage of the process, and we could encounter problems that cause us to abandon an NDA filed with the FDA or any amendment or supplement to an NDA or repeat clinical trials. The commencement and completion of clinical trials for any new indication or current or future development product candidate may be delayed by several factors, including:

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In addition, the FDA or IRBs, DSMBs, or ECs may suspend our clinical trials at any time if it appears that we are exposing participants to unacceptable health risks or if the FDA finds deficiencies in our IND submissions or the conduct of these trials. Therefore, we cannot provide any assurance or predict with certainty the schedule for future clinical trials. Although clinical data is an essential part of NDA filings, NDAs must also contain a range of additional data including CMC data to meet FDA standards for approval. In the event we do not ultimately receive final regulatory approval for any new indications for YUTREPIA or for our other product candidates, including L606, we may be required to terminate development of these indications or product candidates.

Interim, “top-line,” or preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available and are subject to audit and verification procedures that could result in material changes in the final data.

From time to time, we may disclose interim data from our preclinical studies and clinical trials. Interim data from clinical trials that we may complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available. Adverse differences between interim data and final data could significantly harm our business prospects.

From time to time, we may also publicly disclose top-line or preliminary data from our clinical trials, which is based on a preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive review of the data related to the particular study or trial. We also make assumptions, estimations, calculations and conclusions as part of our analyses of data, and we may not have received or had the opportunity to fully and carefully evaluate all data. As a result, the top-line or preliminary results that we report may differ from future results of the same studies, or different conclusions or considerations may qualify such results, once additional data have been received and fully evaluated. Top-line or preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the top-line or preliminary data we previously published. As a result, top-line and preliminary data should be viewed with caution until the final data are available.

The marketing approval processes of the FDA and comparable regulatory authorities in other countries are unpredictable and our products and product candidates may be subject to multiple rounds of review or may not receive marketing approval.

Pursuing marketing approval for a pharmaceutical product candidate (for example, through the NDA process) or for any new indication for a pharmaceutical product (for example, through an amendment or supplement to an NDA) is an extensive, lengthy, expensive and inherently uncertain process. We cannot assure you that we will receive marketing approval for any new indications for YUTREPIA or for any of our other product candidates. Regulatory authorities may

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delay, limit or deny approval of new indications for YUTREPIA or of our other product candidates for many reasons, including, but not limited to, the following:

Even if we obtain marketing approval, the FDA or comparable regulatory authorities in other countries may approve our products or product candidates for fewer or more limited indications than those for which we requested approval or may include safety warnings or other restrictions that may negatively impact the commercial viability of our product candidates. Likewise, regulatory authorities may grant approval contingent on the performance of costly post-marketing clinical trials or other studies or the conduct of an expensive risk evaluation and mitigation strategies, or REMS, which could significantly reduce the potential for commercial success or viability of our products and product candidates. We also may not be able to find acceptable collaborators to manufacture our drug products, if and when approved, in commercial quantities and at acceptable prices, or at all.

We may encounter difficulties in enrolling patients in our clinical trials.

We may not be able to commence or complete clinical trials for our products and product candidates if we are unable to locate and enroll a sufficient number of eligible patients to participate in these trials.

Patient enrollment may be affected by a variety of factors, including, among others:

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Any negative results we may report in clinical trials of our product candidates may also make it difficult or impossible to recruit and retain patients in other clinical trials of that same product or product candidate. In addition, any negative results we may report in clinical trials of our approved products, including YUTREPIA, may negatively affect the commercialization of such products, even for indications other than the indication to which the negative results relate.

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We expect that if we initiate, as we are currently contemplating, a clinical trial of YUTREPIA in pediatric patients, we may encounter difficulties enrolling patients in such a trial because of the limited number of pediatric patients with this disease. Furthermore, we are aware of a number of therapies for PAH and PH-ILD that are being developed or that are already available on the market, and we expect to face competition from these investigational drugs or approved drugs for potential subjects in our clinical trials, including planned clinical trials for YUTREPIA and L606, which may delay enrollment in our planned clinical trials.

Delays or failures in planned patient enrollment or retention may result in increased costs, program delays, or both. We may, as a result of such delays or failures, be unable to carry out our clinical trials as planned or within the timeframe that we expect or at all, and our business and prospects may be materially and adversely affected as a result.

Products and product candidates that the FDA deems to be combination products, such as YUTREPIA and L606, or that otherwise rely on innovative drug delivery systems, may face additional challenges, risks and delays in the product development and regulatory approval process.

The FDA has indicated that it considers both YUTREPIA, which is delivered by a dry powder inhaler, and L606, which is delivered by a next generation nebulizer, to be drug-device combination products, with the primary mode of action determined to be a drug. Accordingly, the medical devices used to administer these products will be evaluated as part of our NDA filing and potentially any amendment or supplement to our NDA. When evaluating products that utilize a specific drug delivery system or device, the FDA will evaluate the characteristics of that delivery system and its functionality, as well as the potential for undesirable interactions between the drug and the delivery system, including the potential to negatively impact the safety or effectiveness of the drug. The FDA review process can be more complicated for combination products, and may result in delays, particularly if novel delivery systems are involved. We rely on third parties for the design and manufacture of the delivery systems for our products, including the dry powder inhaler for YUTREPIA and the nebulizer for L606, and in some cases for the right to refer to their data on file with the FDA or other regulators. Quality or design concerns with the delivery system, or commercial disputes with these third parties, could delay or prevent regulatory approval and commercialization of our product candidates.

We are currently pursuing the FDA 505(b)(2) pathway for our current product candidates. If we are unable to rely on the 505(b)(2) regulatory pathway, or otherwise choose not to rely on the 505(b)(2) regulatory pathway, to apply for marketing approval of our product candidates in the United States, seeking approval of these product candidates through the 505(b)(1) NDA pathway would require full reports of investigations of safety and effectiveness, and the process of obtaining marketing approval for our product candidates would likely be significantly longer and more costly.

We are currently focused on developing drug products that can be approved under abbreviated regulatory pathways in the United States, such as the 505(b)(2) regulatory pathway, which permits the filing of an NDA where at least some of the information required for approval comes from studies that were not conducted by or for the applicant and for which the applicant has not obtained a right of reference. Section 505(b)(2), if applicable to us for a particular product candidate, would allow an NDA we submit to the FDA to rely in part on data in the public domain or the FDA’s prior conclusions regarding the safety and effectiveness of approved compounds, which could expedite the development program for a product candidate by potentially decreasing the amount of clinical data that we would need to generate in order to obtain FDA approval. We pursued this pathway for our first approved product, YUTREPIA, and are currently pursuing this pathway for L606. Even if the FDA allows us to rely on the 505(b)(2) regulatory pathway for a given product candidate, we cannot assure you that marketing approval will be obtained in a timely manner, or at all.

The FDA may require us to perform additional clinical trials to support any change from the reference listed drug, which could be time-consuming and substantially delay our receipt of marketing approval. Also, as has been the experience of others in our industry, our competitors may file citizen petitions or other correspondence with the FDA or lawsuits against the FDA to contest approval of our NDA or any amendments or supplements to our NDA, which may delay or even prevent the FDA from approving any NDA that we submit under the 505(b)(2) regulatory pathway or require the FDA to withdraw approval of our NDA. For instance, United Therapeutics filed lawsuits against us and the FDA and filed a citizen petition in an attempt to prevent or delay the approval for YUTREPIA, and United Therapeutics may employ similar tactics with respect to L606. If an FDA decision or action relative to our product candidate, or the FDA’s

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interpretation of Section 505(b)(2) more generally, is successfully challenged, it could result in delays or even prevent the FDA from approving a 505(b)(2) application for our product candidates or for certain indications for our product candidates. Even if we are able to utilize the 505(b)(2) regulatory pathway, the approval of a drug developed under the 505(b)(2) regulatory pathway may be delayed by one or more regulatory exclusivities. For example, Tyvaso DPI was granted New Clinical Investigation exclusivity, which delayed final approval for YUTREPIA until May 2025. Also, a drug approved via this pathway may be subject to the same post-approval limitations, conditions and requirements as any other drug.

In addition, we may face Hatch-Waxman litigation in relation to our NDAs submitted under the 505(b)(2) regulatory pathway or any amendments or supplements to such NDAs, which may further delay or prevent the approval of our product candidates or require withdrawal of approval of our products. The pharmaceutical industry is highly competitive, and 505(b)(2) NDAs are subject to special requirements designed to protect the patent rights of sponsors of previously approved drugs that are referenced in a 505(b)(2) NDA. If the previously approved drugs referenced in an applicant’s 505(b)(2) NDA are protected by patent(s) listed in the Orange Book, the 505(b)(2) applicant is required to make a claim after filing its NDA or certain types of amendments or supplements to its NDA that each such patent is invalid, unenforceable or will not be infringed. The patent holder may thereafter bring suit for patent infringement, which will trigger a mandatory 30-month delay (or the shorter of dismissal of the lawsuit or expiration of the patent(s)) in approval of the 505(b)(2) NDA application. In addition, in the event the court in any such lawsuit finds that any claims of any of the asserted patents are both valid and infringed, the court would likely issue an injunction prohibiting approval of the product at issue, or withdrawal of approval of the product at issue if it has previously been approved, until the expiration of the patent(s) found to have been infringed.

For example, the YUTREPIA NDA was filed under the 505(b)(2) regulatory pathway with Tyvaso as the reference listed drug. Under the Hatch-Waxman Act, as a result of the litigation commenced by United Therapeutics in June 2020, the FDA was automatically precluded from approving the YUTREPIA NDA for up to 30 months. Also, in connection with an amendment to our NDA filed in July 2023 to add PH-ILD as an indication for YUTREPIA, we provided a new notice of the paragraph IV certification to United Therapeutics as the owner of the patents that are the subject of the certification to which the NDA for YUTREPIA refers. As a result, in September 2023, United Therapeutics filed the ‘327 Patent Litigation in which United Therapeutics is seeking injunctive relief and other remedies. If successful, United Therapeutics may be able to require the FDA to withdraw final marketing approval for YUTREPIA, at least with respect to PH-ILD.

In addition, United Therapeutics may seek to assert other issued patents against us, including U.S. Patent Number 11,723,887, and may seek to enjoin the continued commercialization of YUTREPIA.

It is also not uncommon for a manufacturer of an approved product, such as United Therapeutics, to file a citizen petition or other correspondence with the FDA seeking to delay approval of, or impose additional approval requirements for, pending competing products or to take other actions, such as engaging in litigation with the FDA to enjoin approval of a competing product. If successful, such petitions, correspondence or litigation can significantly delay, or even prevent, the approval of the new product.

If the FDA determines that any of our product candidates do not qualify for the 505(b)(2) regulatory pathway or if we otherwise decide not to utilize the 505(b)(2) regulatory pathway for any of our product candidates, we would need to reconsider our plans and might not be able to commercialize our product candidates in a cost-efficient manner, or at all. If we were to pursue approval under the 505(b)(1) NDA pathway, we would be subject to more extensive requirements and risks such as conducting additional clinical trials, providing additional data and information or meeting additional standards for marketing approval. As a result, the time and financial resources required to obtain marketing approval for our product candidates would likely increase substantially and further complications and risks associated with our product candidates may arise. For example, in order to avoid the prospect of Hatch-Waxman litigation, we may elect to pursue approval of L606 under the 505(b)(1) pathway instead of the 505(b)(2) pathway. If we choose to seek approval for L606 under the 505(b)(1) regulatory pathway, we may be required to conduct additional clinical studies beyond those that are currently contemplated, which may take additional time and financial resources. Also, new competing products may reach the market faster than ours, which may materially and adversely affect our competitive position, business and prospects.

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We may be unable to continually develop a pipeline of product candidates, which could affect our business and prospects.

A key element of our long-term strategy is to continually develop a pipeline of product candidates by developing products for the treatment of respiratory and vascular diseases and proprietary innovations to drug products using our PRINT technology. If we are unable to identify suitable product candidates for the treatment of respiratory and vascular diseases or off-patent drug products for which we can develop proprietary innovations using our PRINT technology or are otherwise unable to expand our product candidate pipeline, whether through licensed or co-development opportunities, and obtain marketing approval for such product candidates within the timeframes that we anticipate, or at all, our business and prospects may be materially and adversely affected.

Disruptions at the FDA, the SEC and other government agencies caused by funding shortages, government shutdowns, layoffs or global health emergencies or their inability to hire, retain or deploy key leadership and other personnel, could prevent new or modified products from being developed, approved or commercialized in a timely manner or at all or otherwise prevent those agencies from performing normal business functions on which the operation of our business may rely, which could negatively impact our operations.

The ability of the FDA and other government agencies to review and approve new or modified products or other regulatory filings can be affected by a variety of factors, including government shutdowns, government budget and funding levels, statutory, regulatory and policy changes, layoffs, a government agency’s ability to hire and retain key personnel and accept the payment of user fees, and other events that may otherwise affect the government agency’s ability to perform routine functions. Average review times at the FDA and other government agencies have fluctuated in recent years as a result. For example, layoffs conducted at several U.S. health agencies, including the FDA, the Department of Health and Human Services (the “HHS”), the Centers for Disease Control and Prevention and the National Institutes of Health, have impacted the FDA’s ability to review and approve new medicines and conduct necessary inspections. The HHS has also proposed a potential major reorganization of the FDA by consolidating product centers for drugs, biologics, devices, tobacco and veterinary medicine, which regulates different product types under distinct rules and regulations and operates under different review processes and timelines for product approval. Over the last several years, the U.S. government has also shut down several times and certain regulatory agencies, such as the FDA and SEC, have had to furlough employees, experience substantial funding cuts and pause or delay critical activities. In addition, government funding of agencies on which our operations may rely, including those that fund research and development activities, is subject to the political process, which is inherently fluid and unpredictable, and spending allocation priorities may undergo significant changes through congressional budgeting and appropriations process. Such disruptions at the FDA and other agencies may also increase the time necessary for new drugs or modifications to approved drugs to be reviewed and/or approved, including delays in PDUFA reviews and related activities, which would adversely affect our business. If prolonged government shutdowns, inadequate funding, loss of employees (including those employees who were previously involved in the review of the NDA for YUTREPIA), changes in regulations or policies or other disruptions were to occur at the FDA, FDA decisions on our submissions related to our products and product candidates could be delayed.

We have conducted, and may in the future conduct, clinical trials for our product candidates outside the United States and the FDA may not accept data from such trials.

Although the FDA may accept data from clinical trials conducted outside the United States in support of safety and efficacy claims for our product candidates, if not conducted under an IND, this is subject to certain conditions set out in 21 C.F.R. § 312.120. For example, we plan to conduct our Phase 3 pivotal clinical trial for L606 in multiple sites around the world and we plan to use such data to support our NDA in the United States for the approval of L606. In order for the FDA to accept data from a foreign clinical trial, the study must have been conducted in accordance with GCP including review and approval by an independent ethics committee and obtaining the informed consent from subjects of the clinical trials. The FDA must also be able to validate the data from the study through an onsite inspection if the agency deems it necessary. In addition, foreign clinical data submitted to support FDA applications should be applicable to the U.S. population and U.S. medical practice. Other factors that may affect the acceptance of foreign clinical data include differences in clinical conditions, study populations or regulatory requirements between the United States and the foreign country.

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Even with regulatory approval for YUTREPIA, our products and business remain subject to ongoing regulatory obligations and review.

YUTREPIA and any of our other product candidates that are approved are subject to ongoing regulatory requirements for manufacturing, labeling, packaging, storage, drug supply chain security surveillance and tracking, advertising, promotion, sampling, record-keeping, conduct of post-marketing studies and submission of safety, efficacy and other post-market information, including both federal and state requirements in the United States and comparable requirements outside of the United States. Accordingly, we and others with whom we work must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production and quality control. YUTREPIA and any other regulatory approvals that we may receive for our product candidates will also be subject to limitations on the approved indicated uses for which the product may be marketed or to the conditions of approval and surveillance to monitor the safety and efficacy of the product candidate. The FDA may also require potentially costly post-marketing testing, including Phase 4 clinical trials, or a REMS as a condition of approval of our product candidates, which could include requirements for a medication guide, physician communication plans or additional elements to ensure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. We will also be required to report certain adverse reactions and production problems, if any, to the FDA or other regulatory agencies and to comply with requirements concerning advertising and promotion for our products. Promotional communications with respect to prescription drugs are subject to a variety of legal and regulatory restrictions and must be consistent with the information in the product’s approved label. As such, we may not promote our products for indications or uses for which they do not have FDA or other regulatory agency approval. The holder of an approved NDA must also submit new or supplemental applications and obtain FDA approval for certain changes to the approved product, product labeling, or manufacturing process. We could also be asked to conduct post-marketing clinical studies to verify the safety and efficacy of our product candidates in general or in specific patient subsets. For instance, we are required to conduct a post-marketing clinical study for YUTREPIA in pediatric patients. An unsuccessful post-marketing study or failure to complete such a clinical study could result in the withdrawal of marketing approval. Furthermore, any new legislation addressing drug safety issues could result in delays in product development or commercialization or increased costs to assure compliance. Foreign regulatory authorities impose similar requirements. If a regulatory agency discovers previously unknown problems with a product, such as adverse events of unanticipated severity or frequency, or disagrees with the promotion, marketing or labeling of a product, such regulatory agency may impose restrictions on that product or us, including requiring withdrawal of the product from the market. If we fail to comply with applicable regulatory requirements, a regulatory agency or enforcement authority may, among other things:

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Any government investigation of alleged violations of law could require us to expend significant time and resources in response and could generate negative publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our ability to commercialize and generate revenue from our products. If regulatory sanctions are applied or if regulatory approval is withdrawn, the value of our company and our operating results will be adversely affected.

We also cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive action, either in the United States or abroad. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we may not be able to generate

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sustained revenue or achieve sustained profitability, which would adversely affect our business, prospects, financial condition and results of operations.

Even with approval of YUTREPIA in the United States and even if we obtain marketing approval for our other product candidates in the United States, we or our collaborators may not obtain marketing approval for YUTREPIA or our other product candidates elsewhere.

We may enter into strategic collaboration arrangements with third parties to commercialize YUTREPIA or our other product candidates outside of the United States. In order to market any product outside of the United States, we or our collaborators will be required to comply with numerous and varying regulatory requirements of other countries regarding safety and efficacy. Clinical trials conducted in one country may not be recognized or accepted by regulatory authorities in other countries, and obtaining marketing approval in one country does not mean that marketing approval will be obtained in any other country. Approval processes vary among countries and additional product testing and validation, or additional administrative review periods, may be required from one country to the next.

Seeking marketing approval in countries other than the United States could be costly and time-consuming, especially if additional preclinical studies or clinical trials are required to be conducted. We currently do not have any products approved for sale in any non-U.S. jurisdiction, and we do not have experience in obtaining marketing approval in non-U.S. markets. We currently also have not identified any collaborators to market our products outside of the United States and cannot assure you that such collaborators, even if identified, will be able to successfully obtain marketing approval for our product candidates outside of the United States. If we or our collaborators fail to obtain marketing approval in non-U.S. markets, or if such approval is delayed, our target market may be reduced, and our ability to realize the full market potential of our products will be adversely affected.

Risks Related to Government Regulation

The pharmaceutical industry is subject to a range of laws and regulations in areas including healthcare program requirements and fraud, waste, and abuse; healthcare and related marketing compliance and transparency; and privacy and data security. Our failure to comply with these laws and regulations as they are, or in the future become, applicable to us may have an adverse effect on our business.

Healthcare providers, physicians and third-party payors often play a primary role in the recommendation and prescription of any drug products for which we have or may obtain marketing approval, or for which we may provide contracted promotional services to third parties. Our current and future arrangements with healthcare providers, physicians, third-party payors and customers, and our sales, marketing and educational activities, may expose us to broadly applicable fraud and abuse and other healthcare laws and regulations (at the federal and state level) that may constrain our business or financial arrangements and relationships through which we market, sell, or distribute drug products.

In addition, we may be subject to transparency laws and patient privacy and security regulation by both the federal government and the states in which we conduct our business. We also plan to conduct clinical trials and may in the future conduct business in jurisdictions outside of the United States, which may cause us to become subject to laws and regulations related to transparency, privacy and security and reimbursement.

The laws in the United States that may affect our ability to operate include, but are not limited to, the following examples:

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Ensuring that our business and business arrangements with third parties comply with applicable healthcare laws, as well as responding to possible investigations by government authorities, can be time- and resource-consuming and can divert management’s attention from the business, even if the government ultimately finds that no violation has occurred.

It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. A government investigation, regardless of its outcome, could impact our business practices, harm our reputation, divert attention of management, increase our expenses and reduce availability of assistance to patients. If our operations are found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant penalties, including civil, criminal and administrative penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in government-funded healthcare programs, such as Medicare and Medicaid, integrity oversight and reporting obligations, contractual damages, reputational harm, diminished profits and future earnings and the curtailment or restructuring of our operations. Defending against any such actions can be costly and time-consuming and may require significant financial and personnel resources. Therefore, even if we are successful in defending against any such actions that may be brought against us, our business may be impaired. Further, if any of the physicians or other healthcare providers or entities with whom we expect to do business are found not to be in compliance with applicable laws or regulations, they may be subject to significant criminal, civil or administrative sanctions, including exclusions from government-funded healthcare programs.

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Ensuring that our business arrangements with third parties comply with applicable healthcare laws and regulations involves substantial costs. The compliance and enforcement landscape, and related risk, is informed by government enforcement precedent and settlement history, Office of Inspector General advisory opinions, and special fraud alerts. Our approach to compliance may evolve over time in light of these types of developments. Additionally, the potential safe harbors available under the federal AKS are subject to change through legislative and regulatory action, and we may decide to adjust our business practices or be subject to heightened scrutiny as a result. If our operations, including activities to be conducted by our sales team, were to be found to be in violation of any of these laws or any other governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties, damages, fines, exclusion from government-funded healthcare programs, such as Medicare and Medicaid, qui tam actions brought by individual whistleblowers in the name of the government, and the curtailment or restructuring of our operations.

Recently enacted and future legislation and other developments may increase the difficulty and cost for us to obtain marketing approval of and commercialize our products and product candidates and affect the prices we may obtain.

In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changes regarding the healthcare system that could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to set the price and profitably sell products for which we have or will obtain marketing approval.

In the United States, the ACA is a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose taxes and fees on the health industry and impose additional health policy reforms.

Among the provisions of the ACA of importance to our products and product candidates are the following:

Since its enactment, there have been judicial, executive and Congressional challenges to certain aspects of the ACA. The OBBBA has enacted, among others, changes to eligibility requirements for premium tax credits, which has resulted, and is expected to result, in less coverage in the ACA’s health insurance marketplace (“Marketplace”) over the next few years. In addition, the OBBBA has made other changes to the enrollment and eligibility requirements for Medicaid. Further, the CMS recently proposed two mandatory payment model pilots, the Guarding U.S. Medicare Against Rising Drug Costs (“GUARD”) Model, focused on Part D drugs, and Global Benchmark for Efficient Drug Pricing (“GLOBE”), focused on Part B drugs, which will require pharmaceutical companies to pay additional rebates on certain medicine whose U.S. net-of-discount prices exceed those in certain other countries.

Further, in March 2021, the American Rescue Plan Act of 2021 was signed into law, which, among other things, eliminated the statutory cap on drug manufacturers’ Medicaid Drug Rebate Program rebate liability, effective January 1, 2024, removing the 100% cap that was established in the ACA. In addition, on September 20, 2024, the Centers for Medicare & Medicaid Services issued a final rule titled “Medicaid Program; Misclassification of Drugs, Program Integrity Updates Under the Medicaid Drug Rebate Program” which may impact our reimbursement and rebate strategy. The ACA expanded the 340B drug discount program to additional facilities for outpatient drugs. These facilities may purchase drugs at the discounted price provided to Medicaid and dispense drugs to people with commercial insurance coverage. This program has greatly expanded over time with qualifying facilities establishing relationships with contract

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pharmacies, which has continued to exert downward pressure on price and profitability of outpatient medicines. Any changes to Medicaid required rebates could also affect our 340B pricing. Other aspects of the 340B program are subject to ongoing litigation, the resolution of which could impact the scope of the 340B program. We expect that other healthcare reform measures that may be adopted in the future may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new payment methodologies and additional downward pressure on the price that we receive for YUTREPIA or any other approved products. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures or other healthcare reforms may prevent us from being able to price our products at what we consider to be a fair or competitive price, generate revenue, attain profitability, or commercialize YUTREPIA or our product candidates, if approved.

Moreover, there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products. Individual states in the United States have become increasingly active in implementing regulations through state Pharmacy Drug Review Boards designed to contain pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures. Further, executive orders were signed to implement Most Favored Nation drug pricing policies designed to align certain prescription drug prices in the U.S. to lower prices available in other countries. The details of the proposed policies are unclear and the final terms and impact remain uncertain, and may pose long-term risks to our business and our future commercialization plans of YUTREPIA and our other drug candidates. In addition, the Fair Prescription Drug Prices for Americans Act was re-introduced in May 2025 and proposes to cap the retail list price of prescription drugs and biological products in the United States at the average retail list price for such product among certain countries. Although it is uncertain if these pricing proposals will take effect, if made effective, such regulations could significantly impact coverage, pricing, and reimbursement for any approved product. These and other similar developments could significantly limit the degree of market acceptance of YUTREPIA or any of our other product candidates that receive marketing authorization.

The IRA, among other things, requires manufacturers of certain drugs to engage in the drug price negotiation program with Medicare or face steep penalties if they don’t agree to provide their drug at the government-set price subject to a cap; imposes rebates under Medicare Part B and Medicare Part D to penalize price increases that outpace inflation; establishes an out-of-pocket maximum for beneficiaries in Part D; and replaces the Part D coverage gap discount program with a new discounting program. The IRA permits the Secretary of the HHS, to implement many of these provisions through guidance, as opposed to regulation, for the initial years. HHS has and will continue to issue and update guidance as these programs are implemented. If any of our approved products are subject to price negotiations, it could, among other things, lead to lower revenues prior to the expiry of intellectual property protections. The Medicare drug price negotiation program is currently subject to legal challenges and therefore, its outcome remains uncertain. We continue to evaluate the impact of the IRA on our business, operations and financial condition.

Legally mandated price controls on payment amounts by third-party payors or other restrictions could harm our ability to price our products appropriately, which could negatively impact our business, results of operations, financial condition and prospects. In addition, regional healthcare authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other healthcare programs. This could reduce the ultimate demand for YUTREPIA or our product candidates, if approved, or put pressure on our product pricing, which could negatively affect our business, results of operations, financial condition and prospects.

Legislative and regulatory proposals have been made to expand post-approval requirements and restrict sales and promotional activities for pharmaceutical products. We cannot be sure whether additional legislative changes will be enacted, or whether the FDA or foreign regulations, guidance or interpretations will be changed, or what the impact of such changes on the marketing approvals of our product candidates, if any, may be. Further, recent policy changes affecting the FDA have resulted in significant changes to research, testing, regulatory approval or clearance, manufacturing and marketing of FDA-regulated products. The FDA has also adopted certain programs, including the PreCheck Program and Commissioner’s National Priority Review Voucher Program, designed to increase domestic production of FDA-regulated products and increased enforcement activities by issuing larger numbers of warning letters to pharmaceutical companies related to violation of regulatory standards governing direct-to-consumer advertising. In

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addition, increased scrutiny by Congress of the FDA’s approval process may significantly delay or prevent marketing approval, as well as subject us to more stringent product labeling and post-marketing testing and other requirements. Changes to healthcare regulation and policies, agency priorities, enforcement initiatives and focus, and coverage and reimbursement for healthcare products and services may be sudden and unexpected, and we may experience increased costs to monitor for such changes and respond to any new requirements affecting our business and operations.

There is also a great degree of uncertainty regarding how the U.S. Supreme Court decisions, including Loper Bright Enterprises v. Raimondo and Corner Post, Inc. v. Board of Governors of the Federal Reserve System, will impact enforcement and decision-making authority of regulatory agencies, including those of the FDA. Loper Bright explicitly overturned Chevron deference, which previously gave judicial deference to administrative action by agencies in the executive branch. Further, the Supreme Court’s decision in Corner Post may result in challenges to FDA decisions by new litigants long into the future, resulting in greater uncertainty about our continued operations. In February 2025, an executive order was signed asserting greater authority over all federal agencies, including those established by Congress as independent from direct presidential control. The executive order may lead to continued delays, if not cancellations, of pending and proposed regulations at federal agencies and introduces uncertainty as it subjects all significant regulatory actions by the agencies to presidential supervision and control. We cannot predict the impact that such executive order, any future executive orders or legislation implementing executive orders may have on our business or our results of operations.

We and the third parties with whom we work are subject to stringent and evolving U.S. and foreign laws, regulations and rules, contractual obligations, industry standards, policies and other obligations related to data privacy and security. Any actual or perceived failure to comply with such obligations could lead to government enforcement actions (which could include civil or criminal penalties), private litigation (including class claims), negative publicity or other adverse consequences that could negatively affect our operating results and business.

In the ordinary course of business, we and our partners process sensitive data, including personal data. As a result, we and our partners may be subject to numerous data privacy and security obligations, such as various federal, state and foreign laws and regulations, guidance, industry standards, external and internal privacy and security policies, contractual requirements and other obligations relating to data privacy and security. In the United States, numerous federal, state and local governments have enacted laws and regulations, including state data breach notification laws, state health information privacy laws, federal and state consumer protection laws and other similar regulations that govern the processing of sensitive data, including health-related information. For example, HIPAA, as amended by HITECH, imposes specific requirements relating to the privacy, security and transmission of individually identifiable protected health information. There are additional federal and state privacy and security-related laws that may be more restrictive than HIPAA and could impose additional penalties. For example, even when HIPAA does not apply, failing to take appropriate steps to keep consumers’ personal information secure may constitute unfair acts or practices in or affecting commerce in violation of the Federal Tort Claims Act. The FTC expects a company’s data security measures to be reasonable and appropriate in light of the sensitivity and volume of consumer information it holds, the size and complexity of its business, and the cost of available tools to improve security and reduce vulnerabilities.

In addition, several U.S. states have enacted comprehensive privacy laws that impose certain obligations on covered businesses, including, without limitation, providing specific disclosures in privacy notices and affording residents with certain rights concerning their personal data. As applicable, such rights may include the right to access, correct or delete certain personal data, and to opt-out of certain data processing activities, such as targeted advertising, profiling and automated decision-making. Failure to comply with these laws, where applicable, can result in significant statutory fines. For example, the California Consumer Privacy Act, as amended by the California Privacy Rights Act of 2020 (collectively the “CCPA”), applies to personal data of consumers, business representatives and employees who are California residents, and requires businesses to provide specific disclosures in privacy notices and honor requests of such individuals to exercise certain privacy rights. The CCPA and other comprehensive U.S. state privacy laws provide exceptions for some data processed in the context of clinical trials, but these developments may further complicate compliance efforts and increase legal risk and compliance costs for us and the third parties with whom we work. The existence of comprehensive privacy laws in different states in the country would make our compliance obligations more complex and costly and may increase the likelihood that we may be subject to enforcement actions or otherwise incur liability for noncompliance.

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Outside the United States, an increasing number of laws and regulations, including the General Data Protection Regulation in the EU and United Kingdom (collectively, the “GDPR”) may also apply to our processing of sensitive data, including health-related and other personal data. The GDPR imposes strict obligations and restrictions on the ability to collect, analyze and transfer personal data, including health data from clinical trials and adverse event reporting. In particular, these obligations and restrictions concern, when required, the consent of the individuals to whom the personal data relates, the information provided to the individuals, the transfer of personal data out of the EU or the United Kingdom, security breach notifications, security and confidentiality of the personal data and imposition of substantial potential fines for breaches of the data protection obligations. In addition, the EU and other jurisdictions have enacted laws restricting the transfer of personal data from the EU and other jurisdictions to the United States due to data localization requirements or limitations on cross-border data flows. Although there are currently various mechanisms that may be used to transfer personal data from the EU and United Kingdom to the United States in compliance with law, these mechanisms are subject to legal challenges, and there is no assurance that we can satisfy or rely on these measures to lawfully transfer personal data to the United States.

Obligations related to data privacy and security (and consumers’ data privacy expectations) are rapidly evolving, becoming increasingly stringent and creating uncertainty. Additionally, these obligations may be subject to differing applications and interpretations, which may be inconsistent or conflict among jurisdictions. Preparing for and complying with U.S. and foreign data privacy and security laws, rules and regulations could require us to take on more onerous obligations in our contracts, require us to engage in costly compliance exercises, restrict our ability to collect, use and disclose sensitive data, or, in some cases, impact our or our partners’ or suppliers’ ability to operate in certain jurisdictions. Any actual or perceived failure to comply with U.S. and foreign data protection laws and regulations could result in government investigations and enforcement actions (which could include civil or criminal penalties), fines, private litigation or adverse publicity and could negatively affect our operating results and business. In particular, plaintiffs have become increasingly more active in bringing privacy-related claims against companies, including class claims and mass arbitration demands. Moreover, patients about whom we or our partners obtain information, as well as the providers who share this information with us, may contractually limit our ability to use and disclose the information. Claims that we have violated individuals’ privacy rights, failed to comply with data protection laws or breached our contractual obligations, even if we are not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could harm our business.

We, directly or through our third-party service providers, may adopt, use or incorporate artificial intelligence (“AI”) technology and capabilities into the information technology systems or software that we use in our business and operations. Defects in such AI technology or related security breaches, loss of data and other disruptions as well as changes in implementation standards and enforcement practices under a rapidly evolving regulatory framework for AI technology may adversely affect our business and operations and potentially expose us to increasing liability.

We, directly or through our third-party service providers, may adopt, use or incorporate AI technology and capabilities into information technology systems or software to help us operate our business more efficiently than existing industry tools. The regulatory framework for AI technologies is rapidly evolving as many federal, state and foreign government bodies and agencies have introduced or are currently considering additional laws and regulations. In addition, existing laws and regulations may be interpreted in ways that would affect the use of AI in our business. As a result, implementation standards and enforcement practices are likely to remain uncertain for the foreseeable future, and we cannot yet determine the impact future laws, regulations, standards, or market perception of such requirements may have on our business and may not always be able to anticipate how to respond to these laws or regulations.

Several governmental agencies in the U.S. and non-U.S. jurisdictions have proposed or enacted laws regulating AI technologies by setting out principles intended to guide AI design and deployment for the public and private sectors and signaling the increase in governmental involvement and regulation over AI technologies. While there is currently no comprehensive federal legislation in the U.S. that regulates the development or use of AI, the significant increase in companies that have incorporated the use of AI in their businesses has heightened review by several government agencies, including the SEC’s focus on AI-washing as a key enforcement priority. In May 2024, the European Union legislators approved the EU Artificial Intelligence Act (the “EU AI Act”), which establishes a comprehensive, risk-based governance framework for AI in the EU market. In July 2025, the EU published a voluntary AI Code of Practice, which is intended to guide developers of AI systems in complying with the EU AI Act and avoid potential penalties. The EU

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AI Act, and developing interpretation and application of the GDPR in respect of automated decision making, together with developing guidance and/or decisions in the impact of AI technology on data privacy, may affect our use of AI technologies and our ability to provide, improve or commercialize our business, require additional compliance measures and changes to our operations and processes, and result in increased compliance costs and potential increases in civil claims against us, and could adversely affect our business, operations and financial condition.

Further, interpretation and implementation of intellectual property protection in the field of AI are rapidly evolving and there is uncertainty and ongoing litigation in different jurisdictions as to the degree and extent of protection warranted for AI and relevant system inputs and outputs. If we fail to obtain protection for intellectual property rights for any of our intellectual property that may incorporate or be developed using AI technologies, or later have our intellectual property rights invalidated or otherwise diminished, our competitors may be able to take advantage of our research and development efforts to develop competing products that could adversely affect our business, reputation and financial condition. Further, other parties may have, or in the future may obtain, patents or other proprietary rights that would prevent, limit or interfere with our ability to use any AI technologies that we may develop or use in our business.

It is possible that further new laws and regulations will be adopted in the United States and in other non-U.S. jurisdictions, or that existing laws and regulations, including competition and antitrust laws, may be interpreted in ways that would limit our ability to use AI technologies for our business, or require us to change the way we use AI technologies in a manner that negatively affects the performance of our system and business and the way in which we use AI technologies. We may need to expend resources to adjust our system in certain jurisdictions if the laws, regulations, or decisions are not consistent across jurisdictions. Further, the cost to comply with such laws, regulations or decisions and/or guidance interpreting existing laws, could be significant and would increase our operating expenses. Such an increase in operating expenses, as well as any actual or perceived failure to comply with such laws and regulations, could materially and adversely affect our business, financial condition, results of operations, and prospects.

Environmental, social and governance matters may impact our business and reputation.

Compliance with environmental, social and governance (collectively, “ESG”) regulations and policies may result in increased costs associated with developing, manufacturing and distributing our products. Our ability to compete could also be affected by changing customer preferences and requirements, such as growing demand for more environmentally friendly products, packaging or supplier practices, or by failure to meet such customer expectations or demand. Regulatory changes and policies have scaled back or halted proposed or enacted ESG-related regulations, which has impacted the requirements and preferences of various government agencies and external stakeholders. To the extent ESG-related regulations and policies remain in place, if we do not meet the ESG expectations of our investors, customers and other stakeholders, we could experience reduced demand for our products, loss of customers, and other negative impacts on our business and results of operations.

Climate change or legal, regulatory or market measures to address climate change may negatively affect our business, results of operations, cash flows and prospects.

We believe that climate change has the potential to negatively affect our business and results of operations, cash flows and prospects. We are exposed to physical risks (such as extreme weather conditions or rising sea levels), risks in transitioning to a low-carbon economy (such as additional legal or regulatory requirements, changes in technology, market risk and reputational risk) and social and human effects (such as population dislocations and harm to health and well-being) associated with climate change. These risks can be either acute (short-term) or chronic (long-term).

The adverse impacts of climate change include increased frequency and severity of natural and man-made disasters and extreme weather events such as hurricanes, flooding, typhoons, tornados, wildfires and fires, drought, extreme heat, earthquakes, water shortages, blizzards and other extreme weather conditions. Extreme weather and sea-level rise pose physical risks to our facilities as well as those of our suppliers. Such risks include losses incurred as a result of physical damage to facilities, loss or spoilage of inventory, power outages, telecommunications, transportation or other infrastructure failure, cybersecurity incidents and other business interruption caused by such natural and man-made disasters and extreme weather events. Other potential physical impacts due to climate change include reduced access to

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high-quality water in certain regions and the loss of biodiversity, which could impact future product development. These risks could disrupt our operations and our supply chain, which may result in increased costs.

New legal or regulatory requirements may be enacted to prevent, mitigate, or adapt to the implications of a changing climate and its effects on the environment. These regulations, which may differ across jurisdictions, could result in us being subject to new or expanded carbon pricing or taxes, increased compliance costs, restrictions on greenhouse gas emissions, investment in new technologies, increased carbon disclosure and transparency, upgrade of facilities to meet new building codes, and the redesign of utility systems, which could increase our operating costs, including the cost of electricity and energy used by us. Our supply chain would likely be subject to these same transitional risks and would likely pass along any increased costs to us.

Risks Related to Our Dependence on Third Parties

We rely on third parties to conduct our preclinical studies and clinical trials.

We currently rely on, and plan to continue to rely on, third-party CROs to monitor and manage data for our preclinical studies and clinical trials. However, we are responsible for ensuring that each of our trials is conducted in accordance with the applicable regulatory standards and our reliance on CROs does not relieve us of our regulatory responsibilities.

The CROs on which we rely are required to comply with FDA regulations (and the regulations of comparable regulatory authorities in other countries) regarding GCP. Regulatory authorities enforce GCP standards through periodic inspections. If any of the CROs on which we rely fail to comply with the applicable GCP standards, the clinical data generated in our clinical trials may be deemed unreliable. While we have contractual agreements with these CROs, we have limited influence over their actual performance and cannot control whether or not they devote sufficient time and resources to our preclinical studies and clinical trials. A failure to comply with the applicable regulations in the conduct of the preclinical studies and clinical trials for our product candidates may require us to repeat such studies or trials, which would delay the process of obtaining marketing approval for our product candidates and have a material and adverse effect on our business and prospects.

Some of our CROs have the ability to terminate their respective agreements with us if, among others, it can be reasonably demonstrated that the safety of the patients participating in our clinical trials warrants such termination. If any of our agreements with our CROs is terminated, and if we are not able to enter into agreements with alternative CROs on acceptable terms or in a timely manner, or at all, the clinical development of our product candidates may be delayed and our development expenses could be increased.

We depend on third parties for clinical and commercial supplies, including single suppliers for the active ingredient, the device, encapsulation and packaging of YUTREPIA and single suppliers for the drug product and device for L606. In the event of any disruption in these supplies, our ability to develop and commercialize, and the timeline for commercialization of, YUTREPIA and/or L606 may be adversely affected.

We depend on third-party suppliers for clinical and commercial supplies for the supply of materials and components necessary for clinical and commercial production of YUTREPIA and L606, including the active pharmaceutical ingredients which are used in our product candidates. These supplies may not always be available to us at the standards we require or on terms acceptable to us, or at all, and we may not be able to locate alternative suppliers in a timely manner, or at all. If we are unable to obtain necessary clinical or commercial supplies, our manufacturing operations and clinical trials and the clinical trials of our collaborators may be delayed or disrupted and our business and prospects may be materially and adversely affected as a result.

For example, we currently rely on a sole supplier for treprostinil, the active pharmaceutical ingredient of YUTREPIA, which sources treprostinil from a manufacturer in South Korea, with whom we have a long-term supply agreement. If our supplier is unable to supply treprostinil to us in the quantities we require, or at all, or otherwise defaults on its supply obligations to us, or if it ceases its relationship with us, we may not be able to obtain alternative supplies of treprostinil from other suppliers on acceptable terms, in a timely manner, or at all. We also rely on a sole supplier located in Tampa, Florida for encapsulation and packaging services, with whom we have a long-term contract. Furthermore, YUTREPIA is

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administered using the RS00 Model DPI, which is manufactured by Plastiape, which is located in Italy. In the event of any prolonged disruption to our supply of treprostinil, the encapsulation and packaging services, or the manufacture and supply of RS00 Model DPI, our ability to develop and commercialize YUTREPIA may be adversely affected.

We have relied upon ICU Medical for servicing and support of CADD MS-3 infusion pumps that patients currently use to administer Treprostinil Injection through subcutaneous injection. ICU Medical no longer manufactures or supports the CADD MS-3 infusion pumps. Although we believe that the number of available CADD-MS 3 infusion pumps will be sufficient to continue serving patients through at least the end of 2026, we currently have no pumps for the subcutaneous administration of Treprostinil Injection to replace the CADD MS-3 infusion pumps. Even if a new pump for the subcutaneous administration of Treprostinil Injection is identified or developed, we, Sandoz or our development partners will be required to obtain FDA clearance. To date, neither we nor Sandoz have submitted a 510(k) clearance application for any such new pumps, and we are currently uncertain when, if ever, such a 510(k) clearance application will be submitted. If the existing supply of CADD MS-3 infusion pumps become unavailable before any new pumps are cleared by the FDA, sales of Treprostinil Injection may be adversely affected.

We also rely upon manufacturers with operations or suppliers in China and Taiwan. Chengdu, which manufactures and supplies RG Cartridges for the subcutaneous administration of Treprostinil Injection, has facilities and suppliers located in China. For L606, we rely upon single sources of supply for the active pharmaceutical ingredient, the device, manufacture of bulk drug product and packaging, some of which are located in Taiwan. The operations of our current manufacturing partners and those of its suppliers may be materially disrupted by changes in regulations or policies, including increased tariffs or restrictions on trade, development, research or manufacturing of pharmaceutical products with certain countries. See Risk Factors—Risks Related to the Commercialization of our Products, Product Candidates and Generic Treprostinil Injection—We are currently operating in a period of global economic uncertainty and capital markets disruption, which has been significantly impacted by geopolitical instability. Changes and instability in global economic conditions and geopolitical matters could have a material adverse effect on our business, financial condition and results of operations. Any such executive orders, legislative action or potential sanctions on certain countries could result in trade wars, supply chain disruptions and heighten geopolitical tensions and instability and we may be unable to secure an adequate supply of RG Cartridges or L606 at a reasonable cost or in a timely manner, if at all. While we are currently working to establish a secondary supply chain outside of Taiwan, we cannot be certain if or when such secondary supply chain will be established.

In addition, while we have secured a device to use in our planned clinical study for L606, the device we plan to use in the clinical study will not be available for use commercially. If we are unable to secure approval for a device to use commercially for our L606 program, if any required bridging studies related to such new device are unsuccessful or if we are unable to establish an agreement with the manufacturer of that device for the commercial supply of such devices or obtain adequate quantities of that device in a timely manner or at all, we may be unable to successfully obtain approval for or commercialize L606, even if our clinical studies with the current device are successful, or to do so in a timely manner.

If any of our limited source suppliers are adversely affected by geopolitical events, natural or man-made disasters, public health emergencies or other events that disrupt or adversely affect their operations or their ability to supply us, our business may be adversely affected.

If we are unable to establish or maintain licensing and collaboration arrangements with other pharmaceutical companies on acceptable terms, or at all, we may not be able to develop and commercialize additional product candidates using our PRINT technology.

We have collaborated with, and may consider collaborating with, among others, pharmaceutical companies to expand the applications for our PRINT technology through licensing as well as joint product development arrangements. In addition, if we are able to obtain marketing approval for our product candidates from regulatory authorities, we may enter into strategic relationships with collaborators for the commercialization of such products.

Collaboration and licensing arrangements are complex and time-consuming to negotiate, document, implement and maintain. We may not be successful in our efforts to establish collaboration or other alternative arrangements should we

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so choose to enter into such arrangements. In addition, the terms of any collaboration or other arrangements that we may enter into may not be favorable to us or may restrict our ability to enter into further collaboration or other arrangements with third parties. For example, collaboration agreements may contain exclusivity arrangements which limit our ability to work with other pharmaceutical companies to expand the applications for our PRINT technology, as is the case in our collaboration agreement with GSK which restricts our ability to use PRINT for inhaled applications with respect to certain identified compounds.

If we are unable to establish licensing and collaboration arrangements or the terms of such agreements we enter into are unfavorable to us or restrict our ability to work with other pharmaceutical companies, we may not be able to expand the applications for our PRINT technology or commercialize our products, if and when approved, and our business and prospects may be materially and adversely affected.

Our collaboration and licensing arrangements may not be successful.

Our collaboration and licensing arrangements, as well as any future collaboration and licensing arrangements that we may enter into, may not be successful. The success of our collaboration and licensing arrangements will depend heavily on the efforts and activities of our collaborators, which are not within our control. We may, in the course of our collaboration and licensing arrangements, be subject to numerous risks, including, but not limited to, the following:

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Risks Related to our Intellectual Property

We may be subject to claims from third parties that our products infringe their intellectual property rights.

The pharmaceutical industry has experienced rapid technological change and obsolescence in the past, and our competitors have strong incentives to stop or delay any introduction of new drug products or related technologies by, among others, establishing intellectual property rights over their drug products or technologies and aggressively enforcing these rights against potential new entrants into the market. We expect that we and other industry participants will be increasingly subject to infringement claims as the number of competitors and drug products grows.

Our commercial success depends in large part upon our ability to develop, manufacture, market and sell our drug products or product candidates without infringing on the patents or other proprietary rights of third parties. It is not always clear to industry participants, including us, what the scope of a patent covers. Due to the large number of patents in issue and patent applications filed in our industry, there is a risk that third parties will claim that our products or technologies infringe their intellectual property rights.

Claims for infringement of intellectual property which are brought against us, whether with or without merit, and which are generally uninsurable, could result in time-consuming and costly litigation, diverting our management’s attention from our core business and reducing the resources available for our drug product development, manufacturing and marketing activities, and consequently have a material and adverse effect on our business and prospects, regardless of the outcome. Moreover, such proceedings could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not being issued. We also may not prevail in any lawsuits that we initiate and the damages or other remedies awarded, if any, may not be commercially meaningful. Uncertainties resulting from the initiation and continuation of litigation or other proceedings could also have a material and adverse effect on our ability to compete in the market. Third parties making claims against us could obtain injunctive or other equitable relief against us, which could prevent us from further developing or commercializing our product candidates.

In particular, under the Hatch-Waxman Act, the owner of patents listed on the Orange Book and referenced by an NDA applicant may bring patent infringement suit against the NDA applicant after receipt of the NDA applicant’s notice of paragraph IV certification. For example, in connection with an amendment to our NDA filed in July 2023 to add PH-ILD as an indication for YUTREPIA, a new notice of the paragraph IV certification was provided to United Therapeutics as the owner of the patents that are the subject of the certification to which the NDA for YUTREPIA refers. As a result, United Therapeutics filed the ‘327 Patent Litigation, in which it is seeking injunctive relief. Although the current litigation concerns the PH-ILD indication, the YUTREPIA product label presently includes indications for both PAH and PH-ILD. As a result, there is a material risk of an adverse ruling by the Court in the ‘327 Patent Litigation, which could result in an injunction that affects the entire product, thereby preventing us from commercializing YUTREPIA at all or at least until PH-ILD is removed from the label for YUTREPIA.

In addition, United Therapeutics may bring lawsuits alleging that we infringe patents even outside of the Hatch-Waxman context. For example, United Therapeutics filed a lawsuit alleging that we infringe the ‘782 patent in which it is seeking injunctive relief and monetary damages. United Therapeutics may also seek to assert other patents against us, including U.S. Patent Number 11,723,887, or newly issued patents that do not currently exist, and may seek to require the FDA to withdraw final approval for YUTREPIA for one or more indications or other monetary or equitable relief.

In the event of a successful infringement claim against us, including an infringement claim filed in response to a paragraph IV certification, we may be required to pay damages, cease the development or commercialization of our drug products or product candidates, limit the label of our products to fewer indications than intended, re-engineer or redevelop our drug products or product candidates or enter into royalty or licensing agreements, any of which could have a material and adverse impact on our business, financial condition and results of operations. Any effort to re-engineer or redevelop our products would require additional monies and time to be expended and may not ultimately be successful.

Infringement claims may be brought against us in the future, and we cannot assure you that we will prevail in any ensuing litigation given the complex technical issues and inherent uncertainties involved in intellectual property

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litigation. Our competitors may have substantially greater resources than we do and may be able to sustain the costs of such litigation more effectively than we can.

Our commercial success depends largely on our ability to protect our intellectual property.

Our commercial success depends, in large part, on our ability to obtain and maintain patent protection and trade secret protection in the United States and elsewhere in respect of our product candidates and PRINT technology. If we fail to adequately protect our intellectual property rights, our competitors may be able to erode, negate or preempt any competitive advantage we may have. To protect our competitive position, we have filed and will continue to file for patents in the United States and elsewhere in respect of our product candidates and PRINT technology. The process of identifying patentable subject matter and filing a patent application is expensive and time-consuming. We cannot assure you that we will be able to file the necessary or desirable patent applications at a reasonable cost, in a timely manner, or at all. Further, since certain patent applications are confidential until patents are issued, third parties may have filed patent applications for subject matter covered by our pending patent applications without us being aware of such applications, and our patent applications may not have priority over patent applications of others. In addition, we cannot assure you that our pending patent applications will result in patents being obtained. Once published, all patent applications and publications throughout the world, including our own, become prior art to our new patent applications and may prevent patents from being obtained or interfere with the scope of patent protection that might be obtained. The standards that patent offices in different jurisdictions use to grant patents are not always applied predictably or uniformly and may change from time to time.

Even if we have been or are able to obtain patent protection for our product candidates or PRINT technology, if the scope of such patent protection is not sufficiently broad, we may not be able to rely on such patent protection to prevent third parties from developing or commercializing product candidates or technology that may copy our product candidates or technology. The enforceability of patents in the pharmaceutical industry involves complex legal and scientific questions and can be uncertain. Accordingly, we cannot assure you that third parties will not successfully challenge the validity, enforceability or scope of our patents. A successful challenge to our patents may lead to generic versions of our drug products being commercialized before the expiration of our patents or otherwise limit our ability to stop others from using or commercializing similar or identical products and technology. A successful challenge to our patents may also reduce the duration of the patent protection of our drug products or technology. In addition, we cannot assure you that we will be able to detect unauthorized use or take appropriate, adequate and timely actions to enforce our intellectual property rights. If we are unable to adequately protect our intellectual property, our business, competitive position and prospects may be materially and adversely affected.

For example, we instituted a lawsuit against United Therapeutics for infringement of the ‘494 Patent in the U.S. District Court for the Middle District of North Carolina. As part of that lawsuit, United Therapeutics has asserted that it has an ownership interest in the ‘494 Patent, and that we cannot assert the ‘494 Patent against them, as a result of a former employee’s breach of a contractual obligation to United Therapeutics. In addition, United Therapeutics may argue that one or more claims of the ‘494 Patent are invalid or that the scope of the ‘494 Patent is limited such that they do not infringe the ‘494 Patent. If they are successful in establishing an ownership interest in the ‘494 Patent, invalidating one or more claims of the ‘494 Patent or having the scope of the claims limited, we may be unable to prevent United Therapeutics or third parties from promoting and commercializing products that fall within the full scope of the ‘494 Patent. In addition, any invalidation or limitation of the scope of the ‘494 Patent could create a precedent that may increase the likelihood that other of our patents are invalidated or subject to similar scope limitations.

Even if our patents or patent applications are unchallenged, they may not adequately protect our intellectual property or prevent third parties from designing around our patents or other intellectual property rights. If the patent applications we file or may file do not lead to patents being granted or if the scope of any of our patent applications is challenged, we may face difficulties in developing our product candidates, companies may be dissuaded from collaborating with us, and our ability to commercialize our product candidates may be materially and adversely affected. We are unable to predict which of our patent applications will lead to patents or assure you that any of our patents will not be found invalid or unenforceable or challenged by third parties. The patents of others may prevent the commercialization of product candidates incorporating our technology. In addition, given the amount of time required for the development, clinical

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testing and regulatory review of new product candidates, any patents protecting our product candidates may expire before or shortly after such product candidates might become approved for commercialization.

Moreover, the issuance of a patent is not conclusive as to the inventorship of the patented subject matter, or its scope, validity or enforceability. We cannot assure you that all of the potentially relevant prior art, that is, any evidence that an invention is already known, relating to our patents and patent applications, has been found. If such prior art exists, it may be used to invalidate a patent or may prevent a patent from being issued.

Questions may also arise as to the ownership of our patents. For instance, in May 2024, United Therapeutics filed a complaint in the Superior Court in Durham County, North Carolina, in which it is seeking declaratory judgement such that all right, title and interest in and to any patentable or unpatentable inventions, discoveries, and ideas made or conceived by the Former Employee while employed by the Company should be assigned and transferred to United Therapeutics because they involved the use of United Therapeutics’ confidential information. If successful, United Therapeutics could obtain an ownership interest in our patents, which may either limit our ability to prevent United Therapeutics from using our patented inventions or even allow United Therapeutics to prevent us from using our own patented inventions.

In addition, we, our collaborators or our licensees may fail to identify patentable aspects of inventions made in the course of development and commercialization activities before it is too late to obtain patent protection on them. As a result, we may miss potential opportunities to seek patent protection or strengthen our patent position.

Patent terms may be inadequate to protect our competitive position on our product candidates for an adequate amount of time.

Patents have a limited lifespan. In the United States, the natural expiration of a patent is generally 20 years after it is filed. While various extensions may be available, the life of a patent, and the protection it affords, is limited. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting such candidates might expire before or shortly after such candidates are commercialized.

We intend to seek extensions of patent terms in the United States and, if available, in other countries where we prosecute patents. In the United States, the Hatch-Waxman Act permits patent owners to request a patent term extension, based on the regulatory review period for a product, of up to five years beyond the normal expiration of the patent, which is limited to one patent claiming the approved drug product or use in an indication (or any additional indications approved during the period of extension). However, the applicable authorities, including the FDA and the USPTO, in the United States, and comparable regulatory authorities in other countries, may not agree with our assessment of whether such extensions are available, and may refuse to grant extensions to our patents, or grant more limited extensions than we had requested. In addition, if we apply any such extension to a patent that is subsequently invalidated, we may lose the benefit of any such extension. In such event, our competitors may be able to take advantage of our investment in development and clinical trials by referencing our preclinical and clinical data in their marketing approval applications with the FDA to launch their drug product earlier than might otherwise be the case.

If we are unable to protect our trade secrets, the value of our PRINT technology and product candidates may be negatively impacted, which would have a material and adverse effect on our competitive position and prospects.

In addition to patent protection, we rely on trade secret protection to protect certain aspects of our intellectual property. We also license trade secrets from Pharmosa with respect to L606. While we require parties who have access to any portion of our trade secrets, such as our employees, consultants, advisers, CROs, CMOs, collaborators and other third parties, to enter into non-disclosure and confidentiality agreements with us, we cannot assure you that these parties will not disclose our proprietary information, including our trade secrets, in breach of their contractual obligations. Enforcing a claim that a party has illegally disclosed or misappropriated a trade secret is difficult, costly and time-consuming, and we may not be successful in doing so. If the steps we have taken to protect our trade secrets are deemed by the adjudicating court to be inadequate, we may not be able to obtain adequate recourse against a party for misappropriating our trade secrets.

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Trade secrets can be difficult to protect as they may, over time, be independently discovered by our competitors or otherwise become known despite our trade secret protection. If any of our trade secrets were to be lawfully obtained or independently developed by our competitors, we would have no right to prevent such competitors, or those to whom they communicate such technology or information, from using that technology or information to compete with us. Such competitors could attempt to replicate some or all of the competitive advantages we derive from our development efforts, willfully infringe our intellectual property rights, design around our protected technology or develop their own competitive technologies that fall outside of our intellectual property rights.

If our trade secrets were to be disclosed to or independently developed by our competitors, our competitors may be able to exploit our PRINT technology to develop competing product candidates, and the value of our PRINT technology and our product candidates may be negatively impacted. This would have a material and adverse effect on our competitive position and prospects.

We rely on licenses to intellectual property that are owned by third parties.

We have entered and may, in the future, enter into license agreements with third parties to license the rights to use their technologies in our research, development and commercialization activities. License agreements generally impose various diligence, milestone payment, royalty, insurance and other obligations on us, and if we fail to comply with these obligations, our licensors may have the right to terminate these license agreements. Termination of these license agreements or the reduction or elimination of our licensed rights or the exclusivity of our licensed rights may have an adverse impact on, among others, our ability to develop and commercialize our product candidates. We cannot assure you that we will be able to negotiate new or reinstated licenses on commercially acceptable terms, or at all.

In addition, we license certain patent rights for our PRINT technology from UNC under the UNC License. Under the UNC License, UNC has the right to terminate our license if we materially breach the agreement and fail to cure such breach within the stipulated time. In the event that UNC terminates our license and we have a product that relies on that license, including YUTREPIA, it may bring a claim against us, and if they are successful, we may be required to compensate UNC for the unauthorized use of their patent rights through the payment of royalties.

Similarly, under our license agreement with Pharmosa, Pharmosa has the right to terminate our license if we materially breach the agreement and fail to cure such breach within the stipulated time. In the event that Pharmosa terminates our license and we have a product that relies on that license, including L606, it may bring a claim against us, and if they are successful, we may be required to compensate Pharmosa for the unauthorized use of their patent rights through the payment of royalties.

Also, the agreements under which we license patent rights may not give us control over patent prosecution or maintenance, so that we may not be able to control which claims or arguments are presented and may not be able to secure, maintain or successfully enforce necessary or desirable patent protection from those patent rights. We do not have primary control over patent prosecution and maintenance for certain of the patents we license, and therefore cannot assure you that these patents and applications will be prosecuted or maintained in a manner consistent with the best interests of our business. We also cannot assure you that patent prosecution and maintenance activities by our licensors, if any, will be conducted in compliance with applicable laws and regulations or will result in valid and enforceable patents.

Pursuant to the terms of some of our license agreements with third parties, some of our third-party licensors have the right, but not the obligation, in certain circumstances, to control the enforcement of our licensed patents or defense of any claims asserting the invalidity of these patents. Even if we are permitted to pursue such enforcement or defense, we will require the cooperation of our licensors, and we cannot assure you that we will receive such cooperation on commercially acceptable terms, or at all. We also cannot assure you that our licensors will allocate sufficient resources or prioritize their or our enforcement of these patents or defense of these claims to protect our interests in the licensed patents. If we cannot obtain patent protection, or enforce existing or future patents against third parties, our competitive position, business and prospects may be materially and adversely affected.

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Further, licenses to intellectual property may not always be available to us on commercially acceptable terms, or at all. In the event that the licenses we rely on are not available to us on commercially acceptable terms, or at all, our ability to commercialize our PRINT technology or product candidates, and our business and prospects, may be materially and adversely affected.

We may become involved in litigation to protect our intellectual property, to enforce our intellectual property rights or to defend against claims of intellectual property infringement by third parties, which could be expensive, time-consuming and may not be successful.

Competitors may infringe our patents or misappropriate or otherwise violate our intellectual property rights. To counter infringement or unauthorized use, we may engage in litigation to, among other things, enforce or defend our intellectual property rights, determine the validity or scope of our intellectual property rights and those of third parties, and protect our trade secrets. For example, we instituted a lawsuit against United Therapeutics for infringement of the ‘494 Patent in the U.S. District Court for the Middle District of North Carolina. Such actions may be time-consuming and costly and may divert our management’s attention from our core business and reduce the resources available for our clinical development, manufacturing and marketing activities, and consequently have a material and adverse effect on our business and prospects, regardless of the outcome.

In addition, in an infringement proceeding, a court may decide that a patent owned by, or licensed to, us is invalid or unenforceable, or may refuse to stop the other party from using the technology in question on the ground that our patents do not cover such technology. An adverse result in any litigation proceeding could put one or more of our patents at risk of being invalidated, held unenforceable or interpreted narrowly. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation, there is a risk that our confidential information may be compromised by disclosure.

We may not be able to enforce our intellectual property rights throughout the world.

Filing, prosecuting, enforcing and defending patents on our PRINT technology and our products and product candidates throughout the world may be prohibitively expensive and may not be financially or commercially feasible. In countries where we have not obtained patent protection, our competitors may be able to use our proprietary technologies to develop competing product candidates.

Also, the legal systems of non-U.S. jurisdictions may not protect intellectual property rights to the same extent or in the same manner as the laws of the United States, and we may face significant difficulty in enforcing our intellectual property rights in these jurisdictions. The legal systems of certain developing countries may not favor the enforcement of patents and other intellectual property rights. We may therefore face difficulty in stopping the infringement or misappropriation of our patents or other intellectual property rights in those countries.

We need to protect our trademark, trade name and service mark rights to prevent competitors from taking advantage of our name recognition.

We believe that the protection of our trademark, trade name and service mark rights, such as Liquidia, the Liquidia logo, PRINT, and YUTREPIA, is an important factor in product recognition, protecting our brand, maintaining goodwill and maintaining or increasing market share. We may expend substantial cost and effort in an attempt to register new trademarks, trade names and service marks and maintain and enforce our trademark, trade name and service mark rights. If we do not adequately protect our rights in our trademarks, trade names and service marks from infringement, any name recognition that we have developed in those trademarks could be lost or impaired.

Third parties may claim that the sale or promotion of YUTREPIA and our product candidates, when and if approved, may infringe on the trademark, trade name and service mark rights of others. Trademark, trade name and service mark infringement problems occur frequently in connection with the sale and marketing of pharmaceutical products. If we become involved in any dispute regarding our trademark, trade name and service mark rights, regardless of whether we prevail, we could be required to engage in costly, distracting and time-consuming litigation that could harm our business. If the trademarks, trade names and service marks we use are found to infringe upon the trademarks, trade names or

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service marks of another company, we could be liable for damages and be forced to stop using those trademarks, trade names or service marks, and as a result, we could lose all the name recognition that has been developed in those trademarks, trade names or service marks.

Risks Related to the Manufacturing of our Products and Product Candidates 

We may experience unexpected challenges as we ramp up our manufacturing capacity to meet demand or during commercial manufacturing, which may result in our inability to supply sufficient quantities of product to meet demand.

We may need to expand our manufacturing capabilities to effectively commercialize YUTREPIA and meet market growth. The manufacturing process for our products is complex, due in part to strict regulatory requirements. A failure of our quality control systems in our facilities or those of our CMOs could cause problems to arise in connection with facility operations for a variety of reasons, including equipment malfunction, viral contamination, failure to follow specific manufacturing instructions, protocols and standard operating procedures, problems with raw materials or environmental factors. Such problems could affect production of a single batch or a series of batches, requiring the destruction of products, or could halt manufacturing operations altogether. For instance, as we scale up the manufacture of YUTREPIA, we will need to file supplements to our NDA for YUTREPIA to describe any changes in our manufacturing process. In addition, if demand for our products exceeds our expectations, we will need to build additional manufacturing capacity. If the FDA does not approve such supplements in a timely manner or at all or if we are unable to increase our manufacturing capacity in time to meet demand, we may be unable to timely deliver products to our customers in sufficient quantities to meet demand, which in turn could damage our reputation for quality and service. Any such incident could, among other things, lead to increased costs, lost revenue, damage to our reputation and relationships with patients, health care providers and third-party payors, time and expense spent investigating the cause of any failure of supply and, depending on the cause, similar losses with respect to other batches. With respect to our commercial manufacturing, if manufacturing problems are not discovered before the product is released to the market, we may be subject to regulatory actions, including product recalls, product seizures, injunctions to halt manufacture and distribution, restrictions on our operations, civil sanctions, including monetary sanctions, and criminal actions. In addition, such issues could subject us to litigation, the cost of which could be significant.

L606 is based on proprietary, novel technology, which has not been used to manufacture any products that have been previously approved by the FDA, making it difficult to predict the time and cost of development and of subsequently obtaining final regulatory approval.

To our knowledge, no regulatory authority has granted final approval to market or commercialize drugs made using Pharmosa’s proprietary liposomal technology. We may never receive final approval to market and commercialize any product candidate that uses Pharmosa’s liposomal technology. In addition, we may experience unexpected challenges as we ramp up our manufacturing capacity for L606 to supply sufficient quantities for clinical requirements. If we are unable to successfully develop and obtain final approval for L606, our business will be adversely affected.

Our facilities are subject to extensive and ongoing regulatory requirements and failure to comply with these regulations may result in significant liability.

Our company and our facilities are subject to payment of fees, registration and listing requirements, ongoing review and periodic inspections by the FDA and other regulatory authorities for compliance with quality system regulations, including the FDA’s cGMP requirements. These regulations cover all aspects of the manufacturing, testing, quality control and record-keeping of our drug products. Furthermore, the facilities where our products and product candidates are manufactured may be subject to inspections by the FDA before we can obtain final marketing approval and remain subject to periodic inspection even after our products and product candidates have received marketing approval. Suppliers of components and materials, such as active pharmaceutical ingredients, used to manufacture our drug products are also required to comply with the applicable regulatory standards.

The manufacture of pharmaceutical products is complex and requires significant expertise and capital investment, including the development of advanced manufacturing techniques and process controls. We and any CMOs that we may

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engage in the future must comply with cGMP requirements. Manufacturers of pharmaceutical products often encounter difficulties in production, particularly in scaling up and validating initial production and contamination controls. These problems include difficulties with production costs and yields, quality control, including stability of the product, quality assurance testing, operator error, shortages of qualified personnel, as well as compliance with strictly enforced federal, state and foreign regulations. Furthermore, if microbial, viral or other contaminations are discovered in our products or product candidates or in the manufacturing facilities in which our products and product candidates are made, such manufacturing facilities may need to be closed for an extended period of time to investigate and remedy the contamination.

Compliance with these regulatory standards often requires significant expense and effort. If we or our suppliers are unable to comply with the applicable regulatory standards or take satisfactory corrective steps in response to adverse results of an inspection, this could result in enforcement action, including, among others, the issue of a public warning letter, a shutdown of or restrictions on our or our suppliers’ manufacturing operations, delays in approving our drug products and refusal to permit the import or export of our drug products. Any adverse regulatory action taken against us could subject us to significant liability and harm our business and prospects.

Our operations are concentrated in Morrisville, North Carolina and interruptions affecting us or our suppliers due to natural or man-made disasters or other unforeseen events could materially and adversely affect our operations and result in losses that may not be covered by insurance.

Most of our current operations are concentrated in Morrisville, North Carolina. In addition, our inventory and certain equipment necessary for the manufacturing of our raw materials and for encapsulating and packaging our products is held in a limited number of locations. Our, and our suppliers’ operations could be subject to the impact of natural or man-made disasters and other business disruptions, which include, but are not limited to, hurricanes, flooding, typhoons, tornados, wildfires and fires, drought, extreme heat, earthquakes, water shortages, blizzards and other extreme weather conditions, as well as power outages, telecommunications, transportation or other infrastructure failure, cybersecurity incidents or physical security breaches, public health emergencies, such as pandemics and epidemics, and geopolitical conflicts, including acts of terrorism, war and civil disorder or unforeseen events, resulting in significant damage to our facilities, to our inventory or to equipment which is necessary for our operations, which could significantly disrupt or curtail or require us to cease our operations. It would be difficult, costly and time-consuming to transfer resources from one facility to another, to repair or replace our facility or to replace inventory or equipment in the event that it is significantly damaged. In addition, our insurance may not be sufficient to cover all of our losses and may not continue to be available to us on acceptable terms, or at all. The cost of insurance has increased significantly, including as a result of the impact of climate change and inflation, and we may not be able to obtain sufficient coverage at a reasonable cost to protect us against losses from such disasters or unforeseen events. In addition, if one of our suppliers experiences a similar disaster or unforeseen event, we could face significant loss of our inventory and significant delays in obtaining our supplies or be required to source supplies from an alternative supplier and may incur substantial costs as a result. Any significant uninsured loss, prolonged or repeated disruption to operations or inability to operate, experienced by us or by our suppliers, could materially and adversely affect our business, financial condition and results of operations.

We are subject to information technology systems failures, security breaches, loss or leakage of data, technological malfunctions or other disruptions, which could result in, among other things, material disruption of our operations, financial losses, the inability to process transactions, the unauthorized release of confidential information and reputational risk, restrictions on accessing critical information and potential exposure to liability, all of which would negatively impact our business, financial condition or results of operations.

Our use of technology, infrastructure and data is critical to our continued operations. We are susceptible to operational, financial and information security risks resulting from security breaches, loss or leakage of data, technological malfunctions or other disruptions. Successful security breaches or technological malfunctions affecting us, our CROs, CMOs, suppliers or other third-party service providers can result in, among other things, material disruption of our operations, including our product development programs, financial losses, the inability to process transactions, the unauthorized release of confidential information, proprietary or other business information (including personal data), reputational risk, restrictions on accessing critical information and potential exposure to liability.

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Cyber-attacks include, but are not limited to, deployment of harmful malware, ransomware, denial-of-service attacks, social engineering and other means to affect service reliability and threaten the confidentiality, integrity and availability of our and our service providers’ systems and the information on such systems. Cyber-attacks can also include phishing attempts or e-mail fraud to cause unauthorized payments or information to be transmitted to an unintended recipient, or to permit unauthorized access to systems. As cybersecurity threats continue to evolve, we may be required to use additional resources to continue to modify or enhance protective measures or to investigate security vulnerabilities, which could have a material adverse effect on our business, financial condition or results of operations.

Any security breach or other incident, whether actual or perceived, could impact our reputation and/or operations, cause us to incur significant costs, including legal expenses, harm customer confidence, hurt our expansion into new markets, cause us to incur remediation costs, or cause us to lose existing customers. For example, the loss of clinical trial data from clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to recover or reproduce the data. To the extent that any disruption or security breach affects our systems (or those of our third-party service providers) or were to result in a loss of or accidental, unlawful or unauthorized access, use, release or other processing of personally identifiable information, confidential or proprietary information or damage to our data or applications, our product development programs could be materially disrupted and we could incur liability and become subject to significant fines, penalties or liabilities for any noncompliance to certain privacy and security laws.

We have also outsourced elements of our information technology infrastructure, and as a result, a number of third-party vendors have access to our confidential information. If the information technology systems of our third-party vendors become subject to disruptions or security breaches that compromise our confidential, proprietary or other business information (including personal data), we may incur liability and reputational damage but have insufficient recourse against such third parties. We will also have to expend significant resources to mitigate the impact of such an event and develop and implement protections to prevent future events of this nature from occurring.

Further, despite the implementation of security measures, our information technology systems and those of our third-party service providers are vulnerable to cybersecurity attacks, breakdowns or other damages or disruptions from service interruptions, system malfunction, unauthorized access or use, natural and man-made disasters, geopolitical conflicts and telecommunications, power outages or other infrastructure failures. Although we currently hold cybersecurity insurance, the costs related to significant security breaches or disruptions could be material and cause us to incur significant expenses.

Risks Related to our Common Stock

Future sales of our common stock or securities convertible into our common stock in the public market could cause our stock price to fall.

Our stock price could decline as a result of sales of a large number of shares of our common stock or the perception that these sales could occur. These sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate.

As of February 17, 2026, 88,114,429 shares of our common stock were outstanding, of which 80,207,199 shares of common stock, or 91.0% of our outstanding shares as of February 17, 2026, are freely tradable without restriction or further registration under the Securities Act, provided however, some of these shares are held by persons deemed to be “affiliates” under the Securities Act, including our officers and directors, as well as our principal stockholders, and may not be sold except: (i) in compliance with Rule 144 under the Securities Act or (ii) pursuant to any other applicable exemption under the Securities Act. The remaining 7,907,230 shares held by our stockholders as of February 17, 2026 have not been registered under the Securities Act and may be only be sold (i) pursuant to an effective registration statement under the Securities Act covering the sale of those shares, (ii) in compliance with Rule 144 under the Securities Act or (iii) pursuant to any other applicable exemption under the Securities Act.

Shares issued upon purchase under the ESPP or upon the exercise of stock options or vesting of restricted stock units outstanding under our equity incentive plans or pursuant to future awards granted under those plans will become available for sale in the public market to the extent permitted by the provisions of applicable vesting schedules, any

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applicable market standoff and lock-up agreements, and Rule 144 and Rule 701 under the Securities Act. We have registered the offer and sale of all shares of common stock that we may issue under our equity compensation plans, including the employee stock purchase plan.

We expect that the market price of our common stock may be volatile, and you may lose all or part of your investment.

The trading prices of the securities of pharmaceutical and biotechnology companies have been highly volatile. As such, the trading price of our common stock may be highly volatile and could be subject to wide fluctuations in response to various factors, some of which are beyond our control. The market price for our common stock may be influenced by many factors, including:

​

The stock market in general, and market prices for the securities of pharmaceutical companies like ours in particular, have from time to time experienced volatility that often has been unrelated to the operating performance of the underlying companies. These broad market and industry fluctuations may adversely affect the market price of our common stock, regardless of our operating performance. Stock prices of many pharmaceutical companies have fluctuated in a manner unrelated or disproportionate to the operating performance of those companies. In several recent situations when the market price of a stock has been volatile, holders of that stock have instituted securities class action

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litigation against the company that issued the stock. If any of our stockholders were to bring a lawsuit against us, the defense and disposition of the lawsuit could be costly and divert the time and attention of our management and harm our operating results.

Our principal stockholders and management own a significant percentage of our stock and will be able to exercise significant influence over matters subject to stockholder approval.

Our executive officers, directors and principal stockholders, together with their respective affiliates, beneficially owned 34.3% of our common stock as of February 17, 2026. Accordingly, our executive officers, directors and principal stockholders have significant influence in determining the composition of our board of directors (the “Board”), and voting on all matters requiring stockholder approval, including mergers and other business combinations, and continue to have significant influence over our operations. This concentration of ownership could have the effect of delaying or preventing a change in our control or otherwise discouraging a potential acquirer from attempting to obtain control of us that you may believe are in your best interests as one of our stockholders. This in turn could have a material adverse effect on our stock price and may prevent attempts by our stockholders to replace or remove the Board or management.

As a public company, we are obligated to develop and maintain proper and effective internal controls over financial reporting and any failure to do so may adversely affect investor confidence in us and, as a result, the trading price of our shares.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting obligations. Our current controls and any new controls that we develop may become inadequate because of changes in accounting principles or in our business conditions.

Inferior internal controls could also cause investors to lose confidence in our reported financial information, which could have a negative effect on the trading price of our common stock. In addition, any future testing by us conducted in connection with Section 404 of the Sarbanes-Oxley Act of 2002, as amended (the “Sarbanes-Oxley Act”) or the subsequent testing by our independent registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that are deemed to be material weaknesses or that may require prospective or retroactive changes to our consolidated financial statements or identify other areas for further attention or improvement, which could subject us to litigation or investigations requiring management resources and costly remediations.

Any material weaknesses identified in the future or retroactive changes to our consolidated financial statements may impact management’s assessment of the effectiveness of our internal controls over financial reporting such that those reports should no longer be relied upon. There can be no assurances that our current internal controls over financial reporting are sufficient to prevent or avoid any potential future material weaknesses.

Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of us difficult, limit attempts by our stockholders to replace or remove our current management and adversely affect our stock price.

Provisions of our certificate of incorporation and bylaws may delay or discourage transactions involving an actual or potential change in our control or change in our management, including transactions in which stockholders might otherwise receive a premium for their shares, or transactions that our stockholders might otherwise deem to be in their best interests. Therefore, these provisions could adversely affect the price of our stock. Among other things, the certificate of incorporation and bylaws:

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In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law (“DGCL”) which generally prohibits a Delaware corporation from engaging in any of a broad range of business combinations with any stockholder owning in excess of 15% of our outstanding stock for a period of three years following the date on which the stockholder obtained such 15% equity interest in us.

The terms of our authorized preferred stock selected by our Board at any point could decrease the amount of earnings and assets available for distribution to holders of our common stock or adversely affect the rights and powers, including voting rights, of holders of our common stock without any further vote or action by the stockholders. As a result, the rights of holders of our common stock will be subject to, and may be adversely affected by, the rights of the holders of any preferred stock that may be issued by us in the future, which could have the effect of decreasing the market price of our common stock.

Any provision of our certificate of incorporation or bylaws or Delaware corporate law that has the effect of delaying or deterring a change in control could limit opportunities for our stockholders to receive a premium for their shares of common stock, and could also affect the price that investors are willing to pay for our common stock.

Our certificate of incorporation designates the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions and proceedings that may be initiated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us or our directors, officers or other employees.

Our certificate of incorporation provides that, to the fullest extent permitted by law, the Court of Chancery of the State of Delaware will be the sole and exclusive forum for: (i) any derivative action or proceeding brought on our behalf; (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors or officers to us or our stockholders; (iii) any action asserting a claim against us arising pursuant to any provision of the DGCL, our certificate of incorporation or our bylaws; or (iv) any action asserting a claim against us governed by the internal affairs doctrine; provided, that, this provision would not apply to suits brought to enforce a duty or liability created by the Securities Act or Exchange Act. Furthermore, our bylaws designate the federal district courts of the United States as the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act. Any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock is deemed to have received notice of and consented to the foregoing provisions. This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds more favorable for disputes with us or our directors or officers, which may discourage such lawsuits against us and our directors or officers. Alternatively, if a court were to find this choice of forum provision inapplicable to, or unenforceable in respect of, one or more of the specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely affect our business, financial condition, prospects or results of operations.

Because we do not anticipate paying any cash dividends on our common stock in the foreseeable future, capital appreciation, if any, will be your sole source of gain.

We have never declared or paid cash dividends on our equity securities. We currently intend to retain all of our future earnings, if any, to finance the growth and development of our business. In addition, the terms of our existing HCR Agreement preclude us, and the terms of any future debt or financing agreement may preclude us, from paying dividends. As a result, capital appreciation, if any, of our equity securities will likely be your sole source of gain for the foreseeable future.

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An impairment of our long-lived contract acquisition costs and intangible assets, including goodwill, could have a material non-cash adverse impact on our results of operations.

In connection with the accounting for our RareGen acquisition, we have recorded significant amounts of contract acquisition costs, intangible assets, and goodwill. Under GAAP, we must assess, at least annually and potentially more frequently, whether the value of goodwill has been impaired. Contract acquisition costs and amortizing intangible assets will be assessed for impairment in the event of an impairment indicator. The valuation of goodwill depends on a variety of factors, the success of our business, including our ability to maintain regulatory approval for and successfully commercialize YUTREPIA, global market and economic conditions, earnings growth and expected cash flows. Impairments may be caused by factors outside our control, such as actions by the FDA, increasing competitive pricing pressures, and various other factors. Significant and unanticipated changes or our inability to obtain or maintain regulatory approvals for our products and product candidates, including the NDA for YUTREPIA, could require a non-cash charge for impairment in a future period, which may significantly affect our results of operations in the period of such charge.

Item 1B. Unresolved Staff Comments.

None.

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Item 1C. Cybersecurity.

Risk Management and Strategy

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Governance

Board Oversight of Cybersecurity Threats

The Board has oversight responsibility for the Company’s overall risk management framework. The Board, acting primarily through the Audit Committee, is also responsible for oversight of our risk management practices, including as to cybersecurity, while management is responsible for the day-to-day risk management processes. The Board receives periodic reports from management regarding the risks facing the Company, including cybersecurity risks. In addition, the Audit Committee assists the Board in its oversight role by receiving regular reports from management regarding risks associated with technology, information systems and controls and security, including risks related to data security, cybersecurity and data privacy and the effectiveness of the Company’s security controls, systems and policies. 

Role of Management

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Item 2. Properties.

Our corporate headquarters is located in Morrisville, North Carolina, and consists of approximately 45,000 square feet of space under a lease that expires on December 31, 2031 and includes an option for us to renew the lease for an additional five years through December 31, 2036. The primary use of this location is general office, laboratory, research and development and light manufacturing. In June 2025, we entered into a lease for a second manufacturing and office space in Morrisville, North Carolina that consists of approximately 70,131 square feet of space. The lease expires on November 1, 2036, with the option to extend for two additional periods of five years each with appropriate notice. This lease is not expected to commence until October 2026. We will seek additional space as needed to accommodate our growth.

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Item 3. Legal Proceedings.

For information on our legal proceedings, see Note 13 Legal Proceedings included in our consolidated financial statements beginning on page F-33 of this Annual Report on Form 10-K.

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Item 4. Mine Safety Disclosures.

Not applicable.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock has been listed on the Nasdaq Capital Market under the symbol “LQDA” since November 19, 2020. Between July 26, 2018 and November 18, 2020, the common stock of Liquidia Technologies, our wholly owned subsidiary and predecessor-in-interest for SEC reporting purposes, was listed on the Nasdaq Capital Market under the symbol “LQDA.” Prior to July 26, 2018, there was no established public trading market for our common stock.

Holders

As of February 17, 2026, there were 47 record holders of our common stock, based upon information received from our transfer agent. However, this number does not include beneficial owners whose shares were held of record by nominees or broker dealers. We estimate that there are more than 1,000 beneficial owners of our common stock.

Dividends

We have never paid any cash dividends on our capital stock. We anticipate that we will retain earnings, if any, to support operations and to finance the growth and development of our business. In addition, the terms of our HCR Agreement precludes us from paying cash dividends, except in certain prescribed circumstances, without the prior written consent of HCR. Therefore, we do not expect to pay cash dividends for the foreseeable future.

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Stock Performance Graph

The graph below compares the cumulative total shareholder return on our common stock between December 31, 2020 and December 31, 2025 with the cumulative total return of (a) the Nasdaq Biotechnology Index and (b) the Nasdaq Composite Index, over the same period, assuming the investment of $100 on December 31, 2020 and the reinvestment of dividends, if any.

Sale of Unregistered Securities

None.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

Neither we nor any affiliated purchaser repurchased any of our equity securities during the year ended December 31, 2025.

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Item 6. [Reserved].

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion and analysis of our financial condition and results of operations together with our financial statements and related notes appearing in this Annual Report on Form 10-K. This discussion and other parts of this Annual Report on Form 10-K contain forward-looking statements that involve risks and uncertainties, such as statements of our plans, objectives, expectations and intentions. As a result of many factors, including those factors set forth in the “Risk Factors” section of this Annual Report on Form 10-K, our actual results could differ materially from the results described in, or implied by, the forward-looking statements contained in the following discussion and analysis.

In this Item 7, we discuss the results of operations for the years ended December 31, 2025 and 2024 and comparisons of the year ended December 31, 2025 to the year ended December 31, 2024. Discussion and analysis of our 2024 fiscal year specifically, as well as the year-over-year comparison of our 2024 financial performance to 2023, are located in Part II, Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, filed with the SEC on March 18, 2025 (which have been revised in Exhibit 99.1 to our Current Report on Form 8-K filed on May 8, 2025).

Objective

The following Management’s Discussion and Analysis of Financial Condition and Results of Operations is intended to provide information necessary to understand our audited consolidated financial statements for the two-year period ended December 31, 2025 and highlight certain other information which, in the opinion of management, will enhance a reader’s understanding of our financial condition, changes in financial condition, results of operations, and cash flows. In particular, the discussion is intended to provide an analysis of significant trends and material changes in our financial position and the operating results of our business during the year ended December 31, 2025, as compared to the year ended December 31, 2024. This discussion should be read in conjunction with our consolidated financial statements for the two-year period ended the year ended December 31, 2025 and related notes included elsewhere in this Annual Report on Form 10-K.

Overview

We are a biopharmaceutical company driven by science and compassion to revolutionize care for patients with challenging respiratory and vascular diseases such as pulmonary arterial hypertension (“PAH”) and pulmonary hypertension associated with interstitial lung disease (“PH-ILD”). We operate through our wholly owned operating subsidiaries, Liquidia Technologies, Inc. and Liquidia PAH, LLC, formerly known as RareGen.

We currently generate revenue through the sale of YUTREPIA (treprostinil) inhalation powder (“YUTREPIA”) and pursuant to a promotion agreement with Sandoz Inc. (“Sandoz”), dated as of August 1, 2018, as amended (the “Promotion Agreement”), under which we share profit derived from the sale of Sandoz’s generic treprostinil injection (“Treprostinil Injection”) in the United States.

We employ a targeted commercial field force calling on healthcare providers involved in the treatment of PAH and PH-ILD in the United States, as well as key stakeholders involved in the distribution and reimbursement of medicines to treat these patients.

YUTREPIA is an inhaled dry powder formulation of treprostinil designed with our proprietary PRINT technology, a particle engineering platform that enables precise production of uniform drug particles, to improve the therapeutic profile of treprostinil by enhancing deep lung delivery while using a convenient, low effort dry-powder inhaler (“DPI”) and by achieving higher dose levels than the labeled doses of other marketed inhaled treprostinil therapies. YUTREPIA was approved by the U.S. Food and Drug Administration (“FDA”) in May 2025 for the treatment of both PAH and PH-ILD, and began commercialization in June 2025.

Treprostinil Injection is a fully-substitutable generic treprostinil for parenteral administration in the United States. We have the exclusive rights to conduct commercial activities for Treprostinil Injection and work jointly with Sandoz on

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commercial strategy for the product. Sandoz retains all rights in and to Treprostinil Injection and holds the Abbreviated New Drug Application (“ANDA”) for Treprostinil Injection.

We also conduct research, development and manufacturing of novel products by applying our subject matter expertise in respiratory and vascular diseases. For example, we are currently developing L606, an investigational, liposomal formulation of treprostinil, which we licensed from Pharmosa Biopharm Inc. (“Pharmosa”), that is administered twice-daily with a short-duration next-generation nebulizer. L606 is currently being evaluated in an open-label study in the United States for treatment of PAH and PH-ILD, and we have initiated a worldwide, placebo-controlled pivotal study for the treatment of PH-ILD. We are also planning to conduct clinical studies to evaluate YUTREPIA for the treatment of pulmonary hypertension associated with chronic obstructive pulmonary disease (“PH-COPD”), idiopathic pulmonary fibrosis (“IPF”), progressive pulmonary fibrosis (“PPF”) and Raynaud’s phenomenon associated with systemic sclerosis (“SSc-RP”).

Since inception, we have incurred significant operating losses. Our net loss was $68.9 million, $128.3 million, and $78.5 million for the years ended December 31, 2025, 2024 and 2023, respectively. As of December 31, 2025, we had an accumulated deficit of $626.3 million. We expect to incur significant expenses for the foreseeable future as we continue commercialization of YUTREPIA and advance our product candidates through clinical trials, seek regulatory approval of such product candidates and pursue commercialization of any such approved product candidates. These efforts require significant amounts of capital, adequate personnel and infrastructure, and extensive compliance-reporting capabilities. It is uncertain whether we will be able to generate sustained revenue from YUTREPIA sales and, even if our development efforts are successful with other product candidates, whether and when, if ever, we will realize sustained revenue from sales of such additional product candidates. Additionally, our HCR Agreement contains fixed quarterly payments and minimum cash covenants that require us to maintain cash and cash equivalents in an amount at least equal to $15.0 million for the remainder of the payment term, which based on amounts funded as of December 31, 2025, is expected to conclude in 2033.

Our future funding requirements will be heavily determined by whether we are able to successfully maintain FDA approval for and commercialize YUTREPIA and the resources needed to support further development of our products and product candidates. Based on current operating plans and excluding any additional external financing, we will have sufficient cash and cash equivalents to fund operating expenses and capital requirements and meet our minimum cash covenants beyond one year from the issuance of these consolidated financial statements. We have based this estimate on assumptions that may prove to be wrong, and we could be limited in our ability to continue to commercialize YUTREPIA and/or we could utilize our available capital resources sooner than we currently expect, which would have a material impact on our operations.

Components of Statements of Operations

Product Sales, Net

We began generating revenue from the sales of YUTREPIA in June 2025, following the FDA approval on May 23, 2025, for the treatment of PAH and PH-ILD. Revenues from product sales are recognized net of variable consideration due to rebates, chargebacks, trade discounts and allowances, sales returns, and other incentives. Provisions for estimated reductions to revenue are provided for in the same period the related sales are recorded and are based on contractual terms, actual utilization data, forecasted payor mix, total prescriptions and industry data. We expect product sales to increase if we are able to maintain FDA approval for YUTREPIA and gain market share.

Service Revenue, Net

We primarily generate service revenue pursuant to the Promotion Agreement, under which we receive a 50% share in the profit derived from the sale of Treprostinil Injection in the United States. Liquidia PAH has the exclusive rights to conduct commercial activities to encourage the appropriate use of Treprostinil Injection. To administer Treprostinil Injection through subcutaneous injection, patients currently must use the CADD-MS 3 infusion pump manufactured by ICU Medical. ICU Medical no longer manufactures or supports the CADD-MS 3 infusion pump. Although we believe that the number of available CADD-MS 3 infusion pumps will be sufficient to serve patients through at least the end of

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2026, it is possible that the availability of CADD-MS 3 infusion pumps could end earlier. Due to this limitation in the availability of pumps, specialty pharmacies will limit the number of patients that they place on subcutaneous Treprostinil Injection therapy in order to ensure that patients placed on subcutaneous administration of Treprostinil Injection will not have to discontinue such treatment due to the unavailability of CADD-MS infusion pumps. Until we and/or Sandoz are able to obtain a pump to replace the CADD-MS 3 infusion pump, if ever, the number of patients that can receive subcutaneous administration of Treprostinil Injection will continue to be constrained. Revenue will continue to be impacted unless and until alternative pumps are available.

Cost of Product Sales

Cost of product sales includes direct and indirect costs related to the manufacturing of inventory products sold, including third-party manufacturing costs, packaging services, freight, storage costs, allocation of overhead costs of employees involved with manufacturing and net sales-based royalty expense. We expect to use inventory previously expensed to research and development within the next three months, and accordingly, we expect our cost of product sales of YUTREPIA to increase as a percentage of product sales in future periods as we produce and sell inventory that reflects the full cost of manufacturing YUTREPIA.

Cost of Service Revenue

Cost of service revenue consists of (i) an allocation of the cost of our commercial field force associated with calling on healthcare providers involved in the treatment of PAH with Treprostinil Injection, as well as key stakeholders involved in the distribution and reimbursement of Treprostinil Injection and (ii) amortization of the intangible asset associated with the Promotion Agreement. We amortize the intangible asset associated with the Promotion Agreement in a manner consistent with our recognition of the related revenue.

Research and Development Expenses

Research and development expenses are incurred in connection with the development of our products and product candidates. We expense research and development costs as incurred. These expenses include employee-related expenses and stock-based compensation for personnel in research and development functions as well as regulatory costs, third-party costs related to conducting clinical trials, such as expenses incurred under agreements with CROs and the cost of clinical trial materials. Research and development expenses also include costs of acquired product licenses and related technology rights where there is no alternative future use.

We expect our research and development expenses to increase related to planned clinical trials and development of L606, however, levels of research and development spending are inherently uncertain and highly dependent upon the progression of projects and may vary. This uncertainty is due to the numerous risks and uncertainties associated with the duration and cost of clinical trials and the terms and timing of regulatory approvals.

Selling, General and Administrative Expenses

Selling, general and administrative expenses primarily consist of salaries and related costs, including stock-based compensation, for personnel in executive, administrative, finance, legal, commercial and technical operations functions. Selling, general and administrative expenses also include corporate infrastructure and software costs, patent filing and prosecution costs and professional fees for marketing, litigation, auditing and tax services and insurance. Commercial costs include bona fide service fees related to distribution of YUTREPIA and the cost of certain patient support programs.

Other Income (Expense)

Other income (expense) is comprised of interest income and expense. Interest income consists of interest earned on our cash equivalents. Interest expense consists of non-cash interest charges on long-term debt.

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Comparison of the Years Ended December 31, 2025 and 2024

The following table summarizes our results of operations:

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Product Sales, Net

Product sales, net, were $148.3 million the year ended December 31, 2025. We began shipping YUTREPIA to our customers in the United States in June 2025, following receipt of full FDA approval for YUTREPIA on May 23, 2025. We did not recognize any revenue from product sales during 2024.

Service Revenue, Net

Service revenue, net, was $10.0 million for the year ended December 31, 2025, compared to $14.0 million for the year ended December 31, 2024. Service revenue, net was related primarily to the Promotion Agreement. The decrease of $4.0 million was primarily due to lower sales volumes in the current year.

Cost of Product Sales

Cost of product sales was $8.8 million for the year ended December 31, 2025. Cost of products sales is related to sales of YUTREPIA. We did not record any cost of product sales during 2024.

Cost of Service Revenue

Cost of service revenue was $4.4 million for the year ended December 31, 2025, compared to $5.9 million for the year ended December 31, 2024. The decrease from 2024 to 2025 reflects a lower allocation of the cost of our commercial field force to Treprostinil Injection resulting from the commercial launch of YUTREPIA in the second quarter of 2025.

Research and Development Expenses

Research and development expenses were $39.3 million for the year ended December 31, 2025, compared to $47.8 million for the year ended December 31, 2024, a decrease of $8.5 million or 18%. The decrease was primarily due to an $8.8 million decrease in personnel expenses, a $2.2 million decrease in stock-based compensation, and a $3.0 million decrease in facilities and infrastructure expenses resulting from a shift from activities related to research and development to the commercialization of YUTREPIA in addition to a $1.7 million decrease in expenses related to our

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YUTREPIA research and development activities. These decreases were offset by a $9.0 million increase in clinical expenses for our L606 program.

Selling, General, and Administrative Expenses

Selling, general and administrative expenses were $157.2 million for the year ended December 31, 2025, compared to $81.6 million for the year ended December 31, 2024, an increase of $75.6 million or 93%. The increase was primarily due to a $33.7 million increase in personnel expenses and a $12.7 million increase in stock-based compensation driven by higher headcount, a $16.1 million increase in commercial and consulting expenses to support the commercialization of YUTREPIA, a $5.3 million increase in legal fees related to our ongoing YUTREPIA-related litigation, and a $3.7 million increase in facilities and infrastructure expenses.

Other Income (Expense)

Total other expense, net was $17.5 million for the year ended December 31, 2025, compared to $7.0 million for the year ended December 31, 2024. The increase of $10.5 million was primarily attributable to the higher borrowings under the HCR Agreement.

Liquidity and Capital Resources

Sources of Liquidity

We have financed our growth and operations through a combination of funds generated from revenues, the issuance of convertible preferred stock and common stock, bank borrowings, the issuance of convertible notes, and other long-term debt. Our principal uses of cash have been for working capital requirements and capital expenditures. As of December 31, 2025, we had cash and cash equivalents of $190.7 million, stockholders’ equity of $44.7 million, and an accumulated deficit of $626.3 million.

In September 2024, we sold 6,460,674 shares of our common stock in an underwritten registered public offering at an offering price of $8.90 per share (the “2024 Offering”) for gross proceeds of approximately $57.5 million, before deducting offering costs of approximately $3.8 million.

A fund affiliated with Paul B. Manning, a member of our Board of Directors, participated in the 2024 Offering and purchased shares of common stock in an aggregate amount of approximately $3.0 million at the public offering price per share and on the same terms as the other purchasers in the 2024 Offering.

Concurrently with the 2024 Offering referenced above, we entered into a common stock purchase agreement with funds managed by Caligan Partners LP (“Caligan”), our largest stockholder, for the sale by us in a private placement of an aggregate of 1,123,595 shares of our common stock at a purchase price of $8.90 per share for gross and net proceeds of approximately $10.0 million (the “Caligan 2024 Private Placement”).

In January 2024, we sold 7,182,532 shares of our common stock in a private placement (the “2024 Private Placement”) at a purchase price of $10.442 per share for gross proceeds of approximately $75.0 million, before deducting offering expenses of less than $0.1 million.

In January 2023, we entered into the HCR Agreement, as amended, pursuant to which HCR has paid us an aggregate investment amount of $175.0 million (the “Investment Amount”). $25.0 million remains available for funding upon mutual agreement of HCR and us. See Note 12 Long-term Debt to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for further information.

Future Funding Requirements

We believe we will have sufficient cash and cash equivalents to meet our financial obligations and minimum cash covenants for at least the next twelve months. While we have included anticipated cash inflows from YUTREPIA

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product sales in our projections, we may not be able to generate sustained revenue from YUTREPIA and the resources needed to support development of L606 may not be accurate. We have based our estimates on assumptions that may prove to be wrong, and we could be limited in our ability to continue to commercialize YUTREPIA and/or use our available capital resources sooner than we currently expect. In the event revenues from YUTREPIA are insufficient to support our business operations and future capital needs, we expect that we would need further financing or we could be forced to delay, limit, reduce or terminate clinical studies or other ongoing activities, which could have a material adverse effect on our business, results of operations, and financial condition.

There are numerous risks and uncertainties associated with research, development and commercialization of pharmaceuticals and our future funding requirements will depend on many factors, including:

See “Risk Factors” for additional risks associated with our substantial capital requirements.

Cash Flows

The following table summarizes our sources and uses of cash, cash equivalents and restricted cash:

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Operating Activities

Net cash used in operating activities decreased $57.7 million to $35.7 million for the year ended December 31, 2025 compared to $93.4 million for the year ended December 31, 2024. The decrease was primarily due to $77.1 million lower net loss adjusted for non-cash items offset by unfavorable working capital changes of $19.4 million.

Investing Activities

Net cash used in investing activities was $6.3 million for the year ended December 31, 2025, compared to $8.4 million for the year ended December 31, 2024. During the year ended December 31, 2025, we made $4.3 million in property,

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plant and equipment purchases and a $2.0 million upfront license fee payment to Vectura for the exclusive rights to develop, manufacture and commercialize for the use in the United States products containing treprostinil, including L606, administered via Vectura’s nebulizer device. During the year ended December 31, 2024, we made $4.9 million in property, plant and equipment purchases and a $3.5 million upfront license fee payment to Pharmosa for the exclusive license in Europe to develop and commercialize L606.

Financing activities

Net cash provided by financing activities was $59.7 million during the year ended December 31, 2025, compared to $194.7 million during the year ended December 31, 2024. During the year ended December 31, 2025, we received $75.0 million net proceeds from the HCR Agreement and $4.8 million from the issuance of common stock under stock incentive plans. These inflows were offset by $21.0 million in payments under the HCR Agreement. During the year ended December 31, 2024, we received $138.6 million net proceeds from the sale of common stock primarily relating to the 2024 Offering and 2024 Private Placement, $57.5 million net proceeds from the HCR Agreement, and $3.0 million from the issuance of common stock under stock incentive plans. These inflows were offset by $4.9 million in payments under the HCR Agreement.

Contractual Obligations and Commitments

Milestone and Royalty Obligations

Under the UNC License Agreement, the Company is obligated to pay UNC royalties equal to a low single digit percentage of all net sales, as defined in the UNC License Agreement, of drug products whose manufacture, use or sale includes any use of the technology or patent rights covered by the UNC License Agreement, including YUTREPIA.

In June 2023, we entered into a License Agreement with Pharmosa pursuant to which we were granted an exclusive license in North America to develop and commercialize L606, an inhaled, sustained-release liposomal formulation of treprostinil currently being evaluated in a clinical trial for the treatment of PAH and PH-ILD. In October 2024, we and Pharmosa amended the agreement to expand our licensed territory to include key markets in Europe, Japan and elsewhere, in addition to licensing proprietary nebulizers controlled by Pharmosa and being evaluated for use in a planned global pivotal study for the treatment of PH-ILD. In consideration for these exclusive rights, we will pay Pharmosa potential development milestone payments tied to clinical development and approvals in PAH and/or PH-ILD of up to $37.75 million, potential sales milestones of up to $185 million in North America and $150 million outside North American and two tiers of low, double-digit royalties on net sales of L606. Pharmosa will also receive a $10 million milestone payment for each additional indication approved by the FDA after PAH and PH-ILD and each additional product approved by the FDA under the license, a $2 million milestone payment for each additional indication approved by the EMA after PAH and PH-ILD, and a $0.5 million milestone payment for each additional indication approved by the PMDA after PAH and PH-ILD. As of December 31, 2025, no development milestones have been achieved under the Pharmosa License Agreement.

In October 2025, we entered into an exclusive licensing agreement (the “Vectura License Agreement”) with Vectura Limited, which provided for, among other things, (i) the exclusive right for us to develop, manufacture and commercialize for use in the United States (the “Territory”) products containing treprostinil, including L606, administered via Vectura’s nebulizer device (the “Vectura Device”) for treatment in the field of hypertension and interstitial lung diseases, including PAH and PH-ILD and (ii) that Vectura shall be responsible for manufacturing and supplying us with clinical and commercial supplies of the Vectura Device. Under the Vectura License Agreement, we paid Vectura an upfront payment of $2.0 million and will pay (i) certain development milestone payments of up to $12.0 million; (ii) certain sales milestone payments of up to $92.5 million tied to commercial sales in the Territory and (iii) royalty payments with royalty rates ranging in the middle single digits tied to commercial sales in the Territory. The Vectura License Agreement also provides us with rights of first negotiation to add additional territories and indications during the term thereof.

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Purchase Obligations

We enter into contracts in the normal course of business with contract third-party service providers to assist in the performance of research and development and manufacturing activities. Subject to required notice periods and obligations under binding purchase orders, we can elect to discontinue the work under these agreements at any time.

On July 14, 2023, we entered into an Amended and Restated Commercial Manufacturing Services and Supply Agreement with Lonza, which was amended on January 7, 2025 (collectively, the “CSA”). Pursuant to the terms of the CSA, we deliver bulk treprostinil powder, manufactured using our proprietary PRINT technology, and Lonza encapsulates and packages it. The CSA was effective upon signing and will be in effect until December 31, 2028 and may thereafter be extended upon the mutual written agreement of the parties in accordance with the terms of the CSA. We are required to provide Lonza with quarterly forecasts of our expected production requirements for the following 24-month period, the first twelve months of which is considered a binding, firm order. We are required to purchase certain minimum annual order quantities, which may be adjusted by us after the thirteenth month after receipt of regulatory approval of YUTREPIA. The CSA provides for tiered pricing depending upon the batch size ordered.

In addition, on January 10, 2020, we entered into a multi-year supply agreement with LGM to supply active pharmaceutical ingredients for YUTREPIA. Under the supply agreement with LGM, we are required to provide rolling forecasts, a portion of which will be considered a binding, firm order, subject to an annual minimum purchase commitment of $2.7 million for the term of the agreement. The agreement expires five years from the first marketing authorization approval of YUTREPIA.

As of December 31, 2025, we have non-cancelable commitments for product manufacturing and supply costs of approximately $58.2 million.

Lease Obligations

We are party to two non-cancelable operating leases for laboratory, manufacturing, and office space. These leases expire on December 31, 2031, with an option to extend for an additional period of five years with appropriate notice, and on November 1, 2036, with the option to extend for two additional periods of five years each with appropriate notice. Minimum operating lease payments under these leases are $2.0 million in 2026, $4.8 million in 2027, $5.0 million in 2028, $5.1 million in 2029, $5.3 million in 2030, and $24.3 million thereafter.

Other Obligations and Contingencies

We from time-to-time are subject to claims and litigation in the normal course of business. See Note 13 Legal Proceedings to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for further discussion of pending legal proceedings.

We have an Executive Severance and Change in Control Plan which covers certain employees and requires payments if certain events, such as a change in control or termination without cause, occur.

Critical Accounting Estimates

We prepare our consolidated financial statements in conformity with U.S. GAAP. The preparation of these financial statements requires the use of estimates, judgments and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the periods presented. Actual results could differ from those estimates and assumptions.

While we describe our significant accounting policies in Note 2 Basis of Presentation, Significant Accounting Policies and Fair Value Measurements to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K, we have identified the following critical accounting estimates:

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Revenue Recognition

Net product revenues from the sale of YUTREPIA are recorded at the transaction price, which reflects gross product sales reduced by corresponding gross-to-net (“GTN”) adjustments, including estimated discounts, government chargebacks, government rebates, specialty distributor fees, copay assistance, and returns. These GTN adjustments represent variable consideration under ASC 606 and are estimated using the expected value method or most likely amount method and are recorded when revenue is recognized on the sale of the product. GTN adjustments are based on available information including the contractual terms with customers, historical trends, industry analogs, communications with customers, and the levels of inventory remaining in the distribution channel, as well as expectations about the market for the product and anticipated introduction of competitive products, in combination with management’s informed judgments. Overall, these reserves reflect our best estimates of the amount of net cash proceeds we expect to realize from collection of current period gross sales less fees, discounts, and allowances and future estimated cash disbursements for the various GTN categories. These estimates are determined using a complex process which requires significant judgment and variances between actual and estimated amounts could have a material impact on our consolidated financial statements.

Research and Development Expenses

As part of the process of preparing our consolidated financial statements, we are required to estimate our incurred expenses. This process involves reviewing quotations and contracts, identifying services that have been performed on our behalf and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of the actual cost. The majority of our service providers invoice us monthly in arrears for services performed or when contractual milestones are met. We make estimates of our accrued expenses as of each balance sheet date in our consolidated financial statements based on facts and circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service providers and make adjustments if necessary. The significant estimates in our accrued research and development expenses are related to expenses incurred with respect to CROs, CMOs and other vendors in connection with research and development and manufacturing activities.

We base our expenses related to CROs and CMOs on our estimates of the services received and efforts expended pursuant to quotations and contracts with such vendors that conduct research and development and manufacturing activities on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided and result in a prepayment of the applicable research and development or manufacturing expense. In accruing service fees, we estimate the time period over which services will be performed and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the accrual or prepaid expense accordingly. Although we do not expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and could result in us reporting amounts that are too high or too low in any particular period. There have been no material changes in estimates for the periods presented within this Annual Report on Form 10-K.

Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined in the rules and regulations of the SEC.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Credit and Interest Rate Risk

Our cash, cash equivalents, and restricted cash are held at multiple accredited financial institutions in deposit accounts or are invested in money market funds. Our investments in money market funds are not insured by the federal government and our deposits have exceeded and will continue to exceed federally insured limits. We have not experienced any losses

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on such accounts and do not believe that we are subject to unusual credit risk beyond the normal credit risk associated with commercial banking relationships. Our cash equivalents are subject to interest rate risk and the rate of return would be negatively impacted by a decrease in interest rates. Due to the short-term nature of our cash equivalents, a sudden change in interest rates would not be expected to have a material effect on our business, financial condition or results of operations. There has been no material change to our interest rate sensitivity during the year ended December 31, 2025.

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Inflation Risk

Inflation has not had a material effect on our business, financial condition or results of operations during the years ended December 31, 2025, 2024, or 2023.

Foreign Exchange Risk

The majority of our business is conducted in U.S. dollars. However, we do conduct certain transactions in other currencies, including Euros and British Pounds. Historically, fluctuations in foreign currency exchange rates have not materially affected our results of operations. During the years ended December 31, 2025, 2024, and 2023, our results of operations were not materially affected by fluctuations in foreign currency exchange rates.

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Item 8. Financial Statements and Supplementary Data.

Our consolidated financial statements and the notes thereto required to be filed pursuant to this Item 8 are included in Part IV, Item 15 of this Annual Report on Form 10-K and are incorporated herein by this reference.

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Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None.

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Item 9A. Controls and Procedures.

Limitations on Effectiveness of Controls

Management recognizes that a control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud or error, if any, have been prevented or detected. These inherent limitations include the realities that judgments in decision making can be faulty, and that breakdowns can occur. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of its inherent limitations, misstatements due to error or fraud may occur and not be prevented or detected.

Conclusions Regarding the Effectiveness of Disclosure Controls and Procedures

As of December 31, 2025, management, with the participation of the Chief Executive Officer and Chief Financial Officer, performed an evaluation of the effectiveness of the design and operation of the Company’s disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act. Based on this evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company’s disclosure controls and procedures were effective at the reasonable assurance level as of December 31, 2025, the end of the period covered by this Annual Report on Form 10-K.

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Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting during the quarter ended December 31, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management’s Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act. Under the supervision and with the participation of our management, including the Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2025 using the criteria described in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on that evaluation, management concluded that the Company’s internal control over financial reporting was effective as of December 31, 2025 based on criteria in Internal Control — Integrated Framework (2013) issued by COSO.

The effectiveness of our internal control over financial reporting as of December 31, 2025 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report, which is included in this Annual Report on Form 10-K.

Item 9B. Other Information.

Rule 10b5-1 Trading Plans

During the fourth quarter of 2025, the following Rule 10b5-1 trading arrangements (as defined in Item 408(a)(1)(i) of Regulation S-K) and non-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K) intended to satisfy the affirmative defense of Rule 10b5-1(c) of the Exchange Act were adopted, modified, or terminated by our directors and/or executive officers (as defined in Section 16 of the Exchange Act):

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During the fourth quarter of 2025, the Company did not adopt, modify, or terminate a Rule 10b5-1 trading arrangement (as defined in Item 408(a)(1)(i) of Regulation S-K) for the purchase or sale of securities of the Company, whether or not intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act.

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Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

None.

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PART III

Item 10. Directors, Executive Officers and Corporate Governance.

Information required to be disclosed by this Item with respect to our executive officers is incorporated into this Annual Report on Form 10-K by reference from the section entitled “Executive Officers and Director and Officer Compensation: Executive Officers” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

Information required to be disclosed by this Item about our Board is incorporated into this Annual Report on Form 10-K by reference from the section entitled “The Class II Director Election Proposal” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

Information required to be disclosed by this Item about the Section 16(a) compliance of our directors and executive officers is incorporated into this Annual Report on Form 10-K by reference from the section entitled “Delinquent Section 16(a) Reports” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, if applicable, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

Information required to be disclosed by this Item about our Board, the Audit Committee of our Board, our audit committee financial expert, our code of conduct, as amended (the “Code of Conduct”), and other corporate governance matters is incorporated into this Annual Report on Form 10-K by reference from the section entitled “Liquidia Corporate Governance” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

The text of our Code of Conduct, which applies to our directors and employees (including our principal executive officer, principal financial officer, and principal accounting officer or controller, and persons performing similar functions), is posted in the “Corporate Governance” section of the Investors section of our website, www.liquidia.com. A copy of the Code of Conduct can be obtained free of charge on our website. We intend to disclose on our website any amendments to, or waivers from, our Code of Conduct that are required to be disclosed pursuant to the rules of the SEC and The Nasdaq Stock Market.

We have adopted an insider trading policy, which governs the purchase, sale and/or other dispositions of our securities by our directors, officers and employees, their immediate family members and entities owned or controlled by them as well as consultants that have access to material nonpublic information, which we believe is reasonably designed to promote compliance with insider trading laws, rules and regulations as well as the listing standards of The Nasdaq Stock Market LLC applicable to us.

The information presented on our website is not a part of this Annual Report on Form 10-K and the reference to our website is intended to be an inactive textual reference only.

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Item 11. Executive Compensation.

Information required to be disclosed by this Item is incorporated into this Annual Report on Form 10-K by reference from the section entitled “Executive Officers and Director and Officer Compensation” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

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Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

Securities Authorized for Issuance Under Equity Compensation Plans

The following table sets forth certain information regarding our equity compensation plans as of December 31, 2025:

The remaining information required to be disclosed by this Item is incorporated into this Annual Report on Form 10-K by reference from the sections entitled “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

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Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information required to be disclosed by this Item is incorporated in this Annual Report on Form 10-K by reference from the sections entitled “Certain Relationships and Related Party Transactions” and “Liquidia Corporate Governance” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

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Item 14. Principal Accounting Fees and Services.

The information required to be disclosed by this Item is incorporated into this Annual Report on Form 10-K by reference from the section entitled “Principal Accounting Fees and Services” contained in our definitive proxy statement for our 2026 annual meeting of stockholders, which we intend to file within 120 days of the end of our fiscal year ended December 31, 2025.

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PART IV

Item 15. Exhibits and Financial Statement Schedules.

Financial Statement Schedules

All schedules are omitted as the information required is inapplicable or the information is presented in the consolidated financial statements or the related notes.

See Exhibit Index below.

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