UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark one)

☒ 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

Commission File No. 0-7099

CECO ENVIRONMENTAL CORP.

Registrant’s telephone number, including area code: (214) 357-6181

Securities registered under Section 12(b) of the Act:

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.

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 Exchange Act). Yes ☐ No ☒

The aggregate market value of voting and non-voting common stock held by non-affiliates of the registrant was $832.7 million based upon the closing market price and shares of common stock outstanding as of June 28, 2025, the last business day of our most recently completed second fiscal quarter. For the purpose of the foregoing calculation only, all directors and executive officers of the registrant and owners of more than 10% of the registrant’s common stock are assumed to be affiliates of the registrant. This determination of affiliate status is not necessarily conclusive for any other purpose.

As of February 18, 2026, the registrant had 35,665,813 shares of common stock, par value $0.01 per share, outstanding.

Documents Incorporated by Reference

CECO Environmental Corp.

ANNUAL REPORT ON FORM 10-K

For the year ended December 31, 2025

TABLE OF CONTENTS

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K includes forward-looking statements within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934 (the “Exchange Act”) which are intended to be covered by the safe harbor for “forward-looking statements” provided by the Private Securities Litigation Reform Act of 1995. Any statements contained in this Annual Report on Form 10-K, other than statements of historical fact, including statements about management’s beliefs and expectations, are forward-looking statements and should be evaluated as such. These statements are made on the basis of management’s views and assumptions regarding future events and business performance. We use words such as “believe,” “expect,” “anticipate,” “intends,” “estimate,” “forecast,” “project,” “will,” “plan,” “should” and similar expressions to identify forward-looking statements. Forward-looking statements involve risks and uncertainties that may cause actual results to differ materially from any future results, performance or achievements expressed or implied by such statements. Potential risks and uncertainties, among others, that could cause actual results to differ materially are discussed under “Part I — Item 1A. Risk Factors” of this Annual Report on Form 10-K and include, but are not limited to:

Many of these risks are beyond management’s ability to control or predict. Should one or more of these risks or uncertainties materialize, or should any related assumptions prove incorrect, actual results may vary in material aspects from those currently anticipated. Investors are cautioned not to place undue reliance on such forward-looking statements as they speak only to our views as of the date the statement is made. Except as required under the federal securities laws or the rules and regulations of the Securities and Exchange Commission (the “SEC”), we undertake no obligation to update or review any forward-looking statements, whether as a result of new information, future events or otherwise.

PART I

Item 1. Business

General

CECO Environmental Corp. (“CECO”, “we”, “us”, “our” or the “Company”) is a leading environmentally focused, diversified industrial company, serving the broad landscape of industrial air, industrial water and energy transition markets globally by providing innovative technology and application expertise. We help companies grow their businesses with safe, clean, and more efficient solutions that help protect people, the environment, and industrial equipment. Our solutions improve air and water quality, optimize emissions management, and increase the energy and process efficiency for highly engineered applications in power generation, midstream and downstream hydrocarbon processing and transport, chemical processing, electric vehicle production, polysilicon fabrication, semiconductor and electronics production, battery production and recycling, specialty metals, aluminum and steel production, beverage can manufacturing, industrial and produced water and wastewater treatment, and a wide range of other industrial end markets.

Our customers include some of the largest natural gas processors, transmission and distribution companies, refineries, power generators, industrial manufacturing, engineering and construction companies, semiconductor manufacturers, compressor manufacturers, beverage can manufacturers, metals and minerals, and electric vehicle producers in the world.

We believe our value differentiators include, but are not limited to, our product and solutions performance quality, reliability, durability, on-time delivery, and safety, all of which are underpinned by our core capabilities in advanced design and systems engineering, commercial excellence, and operational excellence. We believe these differentiators and core capabilities are critical to maintaining our competitive position. Additionally, we have built a spirit of continuous improvement to ensure we maintain our market leadership position.

With an installed base of operating systems and equipment in excess of $10 billion, we are targeting to grow a higher share of recurring revenue from aftermarket products and installed base value-added services, which we believe will provide greater customer retention and loyalty, and increased business resiliency.

Agreement and Plan of Merger with Thermon Group Holdings, Inc.

On February 23, 2026, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Longhorn Merger Sub, Inc. and Longhorn Merger Sub LLC, each a direct wholly owned subsidiary of the Company (together, the “Merger Subs”), and Thermon Group Holdings, Inc. (“Thermon”), pursuant to which CECO will acquire Thermon in a cash and stock transaction. The acquisition will be effected pursuant to a two-step merger transaction as contemplated by the Merger Agreement (the “Merger”). The consummation of the Merger is subject to the satisfaction or waiver of customary closing conditions, including, among others, approval by the Company’s stockholders and Thermon’s stockholders, the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, the effectiveness of a registration statement on Form S-4 to be filed by the Company, and other customary regulatory approvals and conditions.

We expect to fund any cash portion of the Merger Consideration and related transaction costs with available cash and borrowings under our existing and/or committed credit facilities. We expect to incur significant costs in connection with the transaction, including legal, accounting, financial advisory and other expenses, and additional costs may be incurred in connection with integration planning and execution. For a description of risks related to the proposed transaction, see “Part I—Item 1A. Risk Factors—Risks Related to the Proposed Transaction with Thermon Group Holdings, Inc.” and for additional details regarding the proposed transaction, see Note 17 to the Consolidated Financial Statements contained in Part II, Item 8 of this Annual Report on Form 10-K.

Industry Overview

We serve a growing multi-billion dollar global industrial market that is highly fragmented and comprised of many industrial sectors and niche applications. Our sectors include industrial wastewater treatment, industrial ventilation systems and contamination controls and filtration, semiconductor fabrication, electronics manufacturing, baseload and backup power generation, hydrocarbon processing, chemical processing, natural gas processing and transport, automobile production, polysilicon production, battery recycling, metals processing and production, produced water treatment, electric vehicle and battery production, desalination water transport, ultra-high purity water treatment for electrolysis and electronics production, naval/marine vessel oily water treatment, aluminum beverage can production, lightweight, high-strength metals production, and datacenter acoustics management.

We believe demand for our products and services will continue to be driven by the following factors:

These factors, individually or collectively, tend to drive increases in industrial capital spending that are not directly impacted by general economic conditions. In contrast, favorable conditions in the economy generally lead to plant expansions and the construction of new industrial sites. However, in a weak economy, customers tend to lengthen the time from initial inquiry to the purchase order or may elect to defer purchases.

Mission and Strategy

Our mission is to help companies grow their business with safe, clean, and more efficient solutions that help protect their people, the environment, and their industrial equipment and facilities.

We seek to fulfill this mission by providing leading solutions for niche, engineered applications in industrial air treatment and management, industrial water treatment, and the energy transition. We will continue to leverage our technologies and application expertise for customers around the world.

Our strategy to become a global leader in niche applications in industrial air treatment and management, industrial water treatment, and the energy transition is supported by an operating environment of performance excellence across the Company.

We constantly look for opportunities to apply our technology and expertise to new customers and in new geographies in our existing end markets, and to enter new end markets with our existing set of products and solutions. Acquisitions are a key part of our growth model and we are continuously seeking out value-added, accretive additions to the CECO portfolio aligned with our strategic focus in industrial air, industrial water, and the energy transition.

We intend to continue to expand our customer base and end markets and have continued to pursue potential attractive growth opportunities both domestically and internationally.

Business Segments

Our reportable segments continue to be focused on attractive end markets, and each segment is aligned to generate profitable growth for the Company with a compelling technology and solution set to benefit customers.

Competitive Strengths

Leading market position as a complete solution provider

We believe we are a leading provider of critical solutions in industrial air quality, industrial water treatment, and energy transition solutions. The multi-billion-dollar global market is highly fragmented with numerous small and regional contracting firms separately supplying engineering services, fabrication, installation, testing and monitoring, products and spare parts. We offer our customers a complete end-to-end solution, including engineering and project management services, procurement and fabrication, construction and installation, aftermarket support, and sale of consumables, which allows our customers to avoid dealing with multiple vendors when managing projects.

Long-standing experience and customer relationships in growing industry

We have serviced the needs of our target markets for over 50 years. Our extensive experience and expertise in providing diversified solutions enhances our overall customer relationships and provides us with a competitive advantage in our markets relative to other companies in the industry. We believe this is evidenced by our strong relationships with many world-class customers. We believe no single competitor has the resources to offer a similar portfolio of product, and service capabilities. We offer the depth of a large organization, while our lean organizational structure keeps us close to our customers and markets, allowing us to offer rapid and complete solutions in each unique situation.

Diversified equipment and solution portfolio and broad customer base

The global diversity of our offerings, footprint, and customer base provides us with multiple growth opportunities. We have a diversified customer base across a range of industries. We believe that the diversity of our customers, solutions, and end markets mitigates our risk of a potential fluctuation or downturn in demand from any individual industry or particular customer. We believe we have the resources and capabilities to meet the needs of our customers as they upgrade and expand domestically as well as into new international markets. Once systems have been installed and a relationship has been established with the customer, we are often awarded repetitive service and maintenance business as the customer's processes change and modifications or additions to its systems become necessary.

Experienced management and engineering team

Our management team has substantial experience in delivering highly-engineered solutions for industrial air quality, industrial water treatment, and energy transition applications. The collective experience of our teams enables us to pursue our strategy, and to successfully execute on our strategic and growth priorities. Our team includes approximately 520 engineers, designers, solution experts, and project managers whose industry experience and technical expertise enable them to have a deep understanding of the solutions that will best suit our customers' needs. The experience and stability of our senior management, operating and engineering teams have been crucial to our recent growth and to developing and maintaining customer relationships, and increasing our market position.

Innovative solutions

We leverage our engineering and manufacturing expertise, fabrication partner network, and strong customer relationships to develop and deliver new products and solutions to address the identified needs of our customers or a particular end market. We thoroughly analyze each new opportunity by considering projected demand, pricing, and cost to deliver, and only pursue those opportunities that we believe will contribute to sustainable earnings growth. In addition, we seek to continually improve our legacy technologies, solutions, and applications with the aim to maintain competitiveness in our existing customer segments, and to adapt them to new industries and customers.

Disciplined acquisition program with successful integration

We believe that we have demonstrated an ability to successfully acquire and integrate companies with complementary product or service offerings. We will continue to seek and execute additional strategic acquisitions and focus on expanding our solution and product breadth and reach, as well as entering into adjacent customer segments and applications. We believe that the breadth and diversity of our products and services together with our ability to deliver full solutions to various end markets provides us with multiple sources of stable growth, relative scale benefits, and a competitive advantage relative to other players in the industry, and we will continue to reinforce this advantage.

Products and Services

We provide a wide range of engineered and configured products and solutions including dampers and diverters, expansion joints, selective catalytic reduction systems, severe-service and industrial cyclones, dust collectors, thermal oxidizers, filtration systems, wet and dry scrubbers, separators and coalescers, water treatment packages, metallic and non-metallic pumps, industrial silencers, and

fluid handling equipment, and plant engineering services and engineered design build fabrication. Our products and solutions primarily compete on the basis of performance, track record, speed of delivery, quality, price, and customer service.

Project Design and Research and Development

Our strategy is to produce and supply differentiated, specialized, or configured products and solutions that are often tailored to the specifications of a customer or application. We start by understanding our customers’ needs, then by focusing our new product development efforts on those criteria that help protect our shared environment while improving a variety of operational outcomes including, but not limited to, facility uptime, production quality, employee safety, equipment protection, and process performance.

We continually collaborate with our customers on projects to ensure the proper solution and customer satisfaction. The project development cycle may follow many different paths depending on the specifics of the job and end market. The cycle can take from one to more than twelve months from concept and design to production but may vary significantly depending on developments that occur during the process, including among others, the emergence of new environmental demands, changes in design specifications, and ability to obtain necessary approvals.

Sales, Marketing, and Support

Our global commercial strategy is to provide a solutions-based approach for our customers, which may take on the role of single source provider of technology, products, and equipment for a particular project. When called upon, this strategy involves expanding our scope of supply by utilizing our portfolio of in-house technologies and those of third-party equipment suppliers, many of which have been long-standing partners evolved from pure supplier roles to value-added business partners. Where we identify a technology that is a critical element or commonly required for a solution, we will consider acquiring such technology to ensure we have the appropriate degree of strategic control. This enables us to leverage existing business with selective alliances of suppliers and application specific engineering expertise. Our value proposition to our customers is to provide competitively priced, customized solutions that leverage our vast project experience base and design library. Our industry-specific knowledge, accompanied by our product and service offerings, provides valuable benefits for our customers and synergies across our network of partners.

We sell and market our products and services with our own direct sales force in key regions including the United States, Netherlands, United Kingdom, Germany, Canada, United Arab Emirates, India, China, Republic of Korea, and Singapore. Our direct sales and business development teams will work in conjunction with outside sales representatives in the North America, South America, Europe, Middle East, Southeast and East Asia, and India regions, when appropriate. We expect to continue expanding our sales and support capabilities and our network of outside sales representatives in key regions domestically and internationally.

We market our offerings to our customers through a variety of channels including, but not limited to, digital, web, social media, email campaigns, individual customer visits, product announcements, brochures, magazine articles, advertisements, and cover or article features in trade journals and other publications. We also participate in public relations and promotional events, including industry tradeshows and technical conferences.

Our customer service organization and sales force provide our customers with technical assistance, use and maintenance information as well as other key information regarding their purchase. We also actively provide our customers with access to key information regarding changes and pending changes in environmental regulations as well as new product or service developments. We believe that maintaining a close relationship with our customers and providing them with the support they request improves their level of satisfaction and enables us to foresee their potential future product needs or service demands. Moreover, this approach can lead to sales of annual service and support contracts as well as consumables. Our website also provides our customers with online tools and technical resources.

Quality Assurance

For our offerings, quality is defined as system performance. We review with our customers, before the contract is signed, the technical specification and the efficiency of the equipment that will be customized to meet their specific needs. We then review these same parameters internally to assure that warranties will be met. Standard project management and production management tools are used to help ensure that all work is done to specification and that project schedules are met. Equipment is tested at the site to ensure it is functioning properly.

Customers

We are not dependent upon any single customer, and no customer contributed 10% or more of our consolidated revenues for the years ended December 31, 2025, 2024, or 2023.

Suppliers and Subcontractors

We purchase our raw materials and supplies from a variety of global sources. When possible, we directly secure iron and steel sheet and plate products from steel mills, whereas other materials are purchased from a variety of steel service centers. Steel prices have traditionally been volatile, but we typically mitigate the risk of higher prices by including a surcharge on our standard products and tracking major materials industry indices and projections. On contract work, we try to mitigate the risk of higher prices by including the current price in our estimate and generally include price inflation clauses for protection.

We continue to monitor developments in tariff policy and evaluate the potential impact on the purchase of raw materials and supplies as additional information becomes available. Tariff policy remains subject to uncertainty, and any actions taken in response will be based on our evaluation of available information at the time. We are also engaging with external trade policy advisors and assessing potential supply chain exposures.

Typically, on turnkey projects, we subcontract manufacturing, electrical work, concrete work, controls, conveyors and insulation. We use subcontractors with whom we have good working relationships and review each project at the beginning and on an ongoing basis to help ensure that all work is being done according to our specifications. Subcontractors are generally paid when we are paid by our customers according to the terms of our contract with the customer. Our business model focuses on effective management of subcontractors and flow of raw and finished materials, which allows us to optimize working capital levels through reduction in certain assets and reduce capital expenditures.

While we believe we have good relationships with our suppliers and subcontractors, we could experience shortages of raw materials and additional inflationary pressures for certain materials and labor. Although we have secured raw materials from existing and alternate suppliers and have taken other actions to mitigate supply disruptions, we cannot guarantee that we can continue to do so in the future. In this event, our business, results, and financial condition could be affected.

Backlog

Backlog (i.e., unfulfilled or remaining performance obligations) represents the sales we expect to recognize for our products and services for which control has not yet transferred to the customer. Backlog was $793.1 million as of December 31, 2025, as compared to $540.9 million as of December 31, 2024, an increase of $252.2 million or 46.6 percent. Backlog is adjusted on a quarterly basis for fluctuations in foreign currency exchange rates. Substantially all backlog is expected to be delivered within 18 - 24 months, with a majority within 12 months. Backlog is not defined by United States generally accepted accounting principles ("GAAP") and our methodology for calculating backlog may not be consistent with methodologies used by other companies.

Competition

The markets we serve are highly fragmented with numerous small and regional participants. We believe no single company competes with us across the full range of our solutions and products. Competition in the markets we serve is based on a number of considerations, including past performance, track record, customer approvals, lead times, technology, applications experience, know-how, reputation, product warranties, service, and price, as well as our being on the customer’s approved vendor list. Demand for our product can vary period over period depending on conditions in the markets we serve. We believe our product performance and quality, reliability, durability, on-time delivery, and safety supported by advanced engineering and operational excellence differentiate us from many of our competitors, including those competitors who often offer products at a lower price.

Due to the size and shipping weight of many of our projects, localized manufacturing/fabrication capabilities are important to our customers. As a result, competition varies widely by region and industry. The market for our engineered products is reasonably competitive and is characterized by technological stability, continuously evolving environmental regulations, and increasing customer requirements. We believe that the additional competitive factors in our markets include:

We believe we compete favorably with respect to these factors.

Government Regulations

We believe our operations are in compliance with applicable environmental laws and regulations. We believe that changes in environmental laws and regulations create opportunities given the nature of our business.

Our business is subject to numerous evolving laws and regulations. While there are not currently regulations proposed or pending that we believe will result in material capital, operating, or other costs to the business at this time, such regulations could be proposed and/or passed into law in 2026 or beyond. Other regulations currently in place could be withdrawn and replaced with more stringent requirements in 2026 or beyond. New laws and regulations and the costs of compliance with such new laws and regulations can only be broadly appraised until their implementation becomes more defined through regulatory guidance and enforcement.

Intellectual Property

We rely on a combination of patent, trademark, copyright, and trade secret laws, employee and third-party nondisclosure/confidentiality agreements, and license agreements to protect our intellectual property. We sell most of our products under a number of registered trade names, brand names, and registered trademarks, which we believe are widely recognized in the industry. While we hold patents within a number of our businesses, we do not view our patents to be material to our business.

Human Capital Management

We have employees located throughout the globe. CECO has approximately 1,540 employees across 10 countries. Of our United States employees, approximately 140 are unionized in our Tennessee, North Carolina, and Ohio facilities. Outside the United States, we enter into employment contracts and/or agreements in those countries where such relationships are mandatory or customary. The provisions of these agreements correspond in each case with the required or customary terms in the subject jurisdiction. We have historically maintained good employee relations and have successfully concluded all of our recent negotiations without a work stoppage. However, we cannot predict the outcome of future contract negotiations.

Our strong employee base, along with our uncompromising commitment to our values of customer first, accountability, relentless execution, respect, integrity and teamwork, provide the foundation of our Company’s success. Employee safety and managing the risks associated with our workplace, is of paramount importance to CECO. We believe that all injuries, occupational illnesses and incidents are preventable, and we are committed to operating with a zero-incident culture. Through our environmental, health and safety program we implement policies and training programs, as well as perform self-audits, to ensure our colleagues leave the workplace safely every day. To better understand employee safety at the site level, we have safety committees and safety scorecards to share best practices between sites. CECO’s foundational commitment to safety is demonstrated by our world-class recordable and loss time rates. We currently share scorecard information monthly with our team members to foster visibility, accountability, and commitment across our workplace, communicating and celebrating successful results across the enterprise. In addition to lagging indicators, such as injury performance, the scorecards highlight leading indicators such as safety observations and near-misses, as well as other proactive actions taken at each site to ensure worker safety. For the year ended December 31, 2025, CECO’s domestic Total Recordable Incident Rate (“TRIR”) was 1.98% as compared to our benchmark industry average TRIR of 2.68%.

We believe a diverse and inclusive workforce is critical to inspiring innovative thinking, creative problem-solving, performance, and results, so we cultivate an environment where team members feel valued, engaged, and inspired to give their best. The unique characteristics that shape each individual help inform our decisions as a company, and this mindset allows CECO to realize new opportunities and add value to our customers, partners, and stockholders.

CECO’s commitment to expanding our diverse workforce and enhancing our inclusive culture is driven by our recognition that a workplace that is reflective of our global customer base establishes a firm foundation to drive creativity and innovation, which leads to problem solving, development, performance, and profitable business success.

We invest in programs and processes that develop our employees’ capabilities to ensure that we have the talent we need to execute our strategic business plans. Our Performance Management Program ensures that all leaders have clear priorities, and that their performance relative to these priorities is linked to their total rewards package. We administer an annual code of conduct training that includes, but is not limited to, the following subject matter areas: anti-corruption, anti-discrimination, anti-harassment, data privacy, appropriate use of company assets, protecting confidential information, and how to report code violations. Each employee takes this annual training and follow up communications are conducted to ensure completion of the course by all employees. We also monitor timely completion of our mandated sexual anti-harassment and workplace violence prevention training courses both domestically and internationally for impacted employees.

We believe our management team has the experience necessary to effectively execute our strategy. Our business leaders have significant industry experience and are supported by an experienced and talented management team that is dedicated to maintaining and expanding our position as a global leader in our markets. For discussion of the risks related to attracting and retention of management and executive employees, refer to “Part I, Item 1A. Risk Factors” of this Annual Report on Form 10-K.

Executive Officers of CECO

The following are the executive officers of the Company as of February 18, 2026. All officers serve for a one-year term or until their successors are elected and qualified.

Todd Gleason (55) has served as a director and Chief Executive Officer since July 2020 and is responsible for driving the Company’s strategic vision and aligning the organization for optimal value creation. Prior to joining the Company, Mr. Gleason most recently, from April 2015 to July 2020, served as President and Chief Executive Officer of Scientific Analytics Inc., a predictive analytic technologies and services company. Prior to that position, Mr. Gleason served from June 2007 to March 2015 in a number of senior officer and executive positions for Pentair plc, a water treatment company. During his tenure with Pentair, Mr. Gleason served as Senior Vice President and Corporate Officer from January 2013 to March 2015, President, Integration and Standardization from January 2010 to January 2013, and Vice President, Global Growth and Investor Relations from June 2007 to January 2010. Before joining Pentair, Mr. Gleason served as Vice President, Strategy and Investor Relations for American Standard Companies Inc. (later renamed to Trane Inc. prior to its acquisition by Ingersoll-Rand Company Limited), a global, diversified manufacturing company, and in a number of different roles (including as Chief Financial Officer, Honeywell Process Solutions) at Honeywell International Inc., a diversified technology and manufacturing company. Mr. Gleason holds Master of Science degrees in Management and Public Policy from Carnegie Mellon University and a Bachelors of Arts in International Studies and History from Wesleyan University. Mr. Gleason currently serves on the board of directors of NSF, whose stated mission is to protect human and planet health through their leading test and measurement, consulting, training and certification, and development of industry leading standards. Previously, Mr. Gleason served on the board of Faradyne, a strategic joint venture between Pentair and Xylem.

Peter Johansson (61) has served as SVP, Chief Financial Officer since August 2022. From April 2020 to August 2022, Mr. Johansson had been an independent strategy and business development consultant and joined CECO as a consultant in October 2021. From June 2014 through March 2020, he was EVP, Strategy, Corporate Development & Marketing for Accudyne Industries, LLC (“Accudyne”), where he was responsible for the formulation and execution of growth, value creation, business development, product line, and M&A strategies, and deployment of a product-line based operating model for an industry-leading portfolio of industrial air and gas compressors, broad pump solutions, rotary mixers, and valves. Prior to joining Accudyne, Mr. Johansson led the corporate, product-line, and M&A growth strategy and implementation of a differentiated business line operating model for IDEX Corporation. He has also held senior business, strategic business development, commercial, and engineering leadership roles with ITT Inc., Trane Technologies PLC, WABCO Holdings, Inc., and Honeywell International, Inc. and its predecessor AlliedSignal Inc. Mr. Johansson earned a Bachelor of Science degree in Mechanical Engineering from Southern Methodist University of Dallas, Texas. He received his Master of Science degree in Mechanical Engineering from California State University at Fullerton, and his MBA from UCLA’s Anderson Graduate School of Management.

Alyson Gregory Richter (47) has served as General Counsel and Corporate Secretary since January 2026. Ms. Richter has been with the Company since 2020, and has served in various roles of increasing responsibility, most recently as Associate Counsel and Director of Corporate Compliance. Prior to joining the Company, she served in various roles with Project Transformation North Texas and Alon USA Energy, Inc., as well as with the law firms of Taber Estes Thorne & Carr, Koons Fuller, and Vinson and Elkins. Ms. Richter received her Bachelor of Arts degree in Spanish from The University of Texas at Austin, and Juris Doctorate from The University of Texas School of Law.

Available Information

We use the Investor Relations section of our website, www.cecoenviro.com, as a channel for routine distribution of important information, including news releases, investor presentations, and financial information. We post filings as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC, including our annual, quarterly, and current reports on Forms 10-K, 10-Q, and 8-K; proxy statements; and any amendments to those reports or statements. All such postings and filings are available on our website free of charge. The SEC also maintains a website, www.sec.gov, that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The content on any website referred to in this Annual Report on Form 10-K is not incorporated by reference into this Annual Report on Form 10-K unless expressly noted.

Item 1A. Risk Factors

An investment in our securities involves a high degree of risk. You should carefully consider the risk factors described below, together with the other information included in this Annual Report on Form 10-K, before you decide to invest in our securities. The risks described below are the material risks of which we are currently aware; however, they may not be the only risks that we may face. Additional risks and uncertainties not currently known to us or that we currently view as immaterial may also impair our business. Although the risks are organized by headings, and each risk is discussed separately, many are interrelated. If any of these risks develop into actual events, it could materially and adversely affect our business, financial condition, results of operations, and cash flows, and the trading price of your shares could decline, and you may lose all or part of your investment.

Risks Related to Our Business and Industry

Our business may be adversely affected by global economic conditions.

A national or global economic downturn or credit crisis may have a significant negative impact on our financial condition, future results of operations and cash flows. Specific risk factors related to these overall economic and credit conditions include the following:

These risk factors could reduce our product sales, increase our operating costs, impact our ability to collect customer receivables, lengthen our cash conversion cycle and increase our need for cash, which would ultimately decrease our profitability and negatively impact our financial condition. They could also limit our ability to expand through acquisitions due to the tightening of the credit markets.

Our dependence upon fixed-price contracts could adversely affect our operating results.

The majority of our projects are currently performed on a fixed-price basis, while a limited number of projects are currently performed on a time and materials basis. Under a fixed-price contract, we agree on the price that we will receive for the entire project, based upon a defined scope, which includes specific assumptions and project criteria. If our estimates of the costs to complete the project are below the actual costs that we incur, our margins will decrease, or we may incur a loss. The revenue, cost and gross profit realized on a fixed-price contract will often vary from the estimated amounts because of unforeseen conditions or changes in job conditions and variations in labor and equipment productivity over the term of the contract. If we are unsuccessful in mitigating these risks, we may realize gross profits that are different from those originally estimated and incur reduced profitability or losses on projects. Depending on the size of a project, these variations from estimated contract performance could have a significant effect on our operating results. In general, turnkey contracts to be performed on a fixed-price basis involve an increased risk of significant variations. Generally, our contracts and projects vary in length, depending on the size and complexity of the project, project owner demands and other factors. The foregoing risks are exacerbated for projects with longer-term durations and the inherent difficulties in estimating costs and of the interrelationship of the integrated services to be provided under these contracts whereby unanticipated costs or delays in performing part of the contract can have compounding effects by increasing costs of performing other parts of the contract.

Accounting for contract revenue may result in material adjustments that would adversely affect our financial condition and results of operations.

We derive a significant portion of our revenues from fixed price contracts. We recognize revenue as performance obligations are satisfied and the customer obtains control of the products and services. A significant amount of our revenue is recognized over a period of time as we perform under the contract because control of the work in process transfers continuously to the customer. For performance obligations to deliver products with continuous transfer of control to the customer, revenue is recognized based on the extent of progress towards completion of the performance obligation. Progress is measured based on the ratio of costs incurred to date to the total estimated costs to complete the performance obligation. For these contracts, the cost-to-cost measure best depicts the continuous transfer of goods or services to the customer.

Contract revenue and total direct cost estimates are reviewed and revised periodically as the work progresses and as change orders are approved, and adjustments are reflected in contract revenue in the period when these estimates are revised. These estimates are based on management’s reasonable assumptions and our historical experience and are only estimates. Variation of actual results from these

assumptions, which are outside the control of management and can differ from our historical experience, could be material. To the extent that these adjustments result in an increase, a reduction or the elimination of previously reported contract revenue, we would recognize a credit or a charge against current earnings, which could be material.

Our inability to deliver our backlog on time could affect our future sales and profitability, and our relationships with our customers.

Our backlog was $793.1 million at December 31, 2025, and $540.9 million at December 31, 2024. Our ability to meet customer delivery schedules for our backlog is dependent on a number of factors including, but not limited to, access to the raw materials required for production, an adequately trained and capable workforce, project engineering expertise for certain large projects, sufficient internal manufacturing plant capacity, available subcontractors, and appropriate planning and scheduling of manufacturing resources. Our failure to deliver in accordance with customer expectations may result in damage to existing customer relationships and result in the loss of future business. Failure to deliver backlog in accordance with expectations could negatively impact our financial performance and cause adverse changes in the market price of our common stock.

Volatility of oil and natural gas prices can adversely affect demand for our products and services.

Volatility in oil and natural gas prices can impact our customers’ activity levels and spending for our products and services. Current energy prices are important contributors to cash flow for our customers and their ability to fund capital expenditures. Lower oil and natural gas prices generally lead to decreased spending by our customers. While higher oil and natural gas prices generally lead to increased spending by our customers, sustained high energy prices can be an impediment to economic growth, and can therefore negatively impact spending by our customers. Our customers also take into account the volatility of energy prices and other risk factors by requiring higher returns for individual projects if there is a higher perceived risk. Any of these factors could affect the demand for oil and natural gas and could have a material effect on our results of operations.

Increasing costs for manufactured components, raw materials, transportation, health care and energy prices may adversely affect our profitability.

We use a broad range of manufactured components and raw materials in our products, including raw steel, steel-related components, resin, filtration media, and equipment such as fans and motors. Materials, wages, and subcontracting costs comprise the largest components of our total costs, and increases in the price of these items could materially increase our operating costs and materially adversely affect our profit margins. Similarly, transportation, steel and health care costs have risen steadily over the past few years and could represent an increasing burden for us. Although we try to contain these costs whenever possible, and although we try to pass along increased costs in the form of price increases to our customers, we may be unsuccessful in doing so, and even when successful, the timing of such price increases may lag significantly behind our incurrence of higher costs.

Our financial performance may vary significantly from period to period.

Our annual revenues and earnings have varied in the past and are likely to vary in the future. Our contracts generally stipulate customer-specific delivery terms and may have contract cycles of a year or more, which subjects these contracts to many factors beyond our control. In addition, contracts that are significantly larger in size than our typical contracts tend to intensify their impact on our annual operating results. Furthermore, as a significant portion of our operating costs are fixed, an unanticipated decrease in our revenues, a delay or cancellation of orders in backlog, or a decrease in the demand for our products, may have a significant impact on our annual operating results. Therefore, our annual operating results may be subject to significant variations and our operating performance in one period may not be indicative of our future performance.

Customers may cancel or delay projects. As a result, our backlog may not be indicative of our future revenue.

Customers may cancel or delay projects for reasons beyond our control. Our orders normally contain cancellation provisions that permit us to recover our costs, and, for most contracts, a portion of our anticipated profit in the event a customer cancels an order. If a customer elects to cancel an order, we may not realize the full amount of revenues included in our backlog. If projects are delayed, the timing of our revenues could be affected, and projects may remain in our backlog for extended periods of time. Revenue recognition occurs over long periods of time and is subject to unanticipated delays. If we receive relatively large orders in any given quarter, fluctuations in the levels of our quarterly backlog can result because the backlog in that quarter may reach levels that may not be sustained in subsequent quarters. As a result, our backlog may not be indicative of our future revenues. With rare exceptions, we are not issued contracts until a customer is ready to start work on a project. Thus, it is our experience that the only relationship between the length of a project and the possibility that a project may be cancelled is simply the fact that there is more time involved. For example, in a year-long project as opposed to a three-month project, more time is available for the customer to experience a softening in its business, which may cause the customer to cancel a project.

We face significant competition in the markets we serve.

All of the product and solution categories in which we compete are highly fragmented and competitive. We compete in industrial markets against a number of local, regional and national manufacturers and suppliers in each of our product or service lines. Our products primarily compete on the basis of performance, quality, reliability, lead time, on-time delivery, and safety supported by advanced engineering and operational excellence. We must also be responsive to any technological developments, including expanded use of data analytics, artificial intelligence, and machine learning, and related changing customer requirements. Any failure by us to compete effectively in the markets we serve could have a material adverse effect on our financial condition, results of operations and cash flows.

We may incur material costs as a result of existing or future product liability claims, or other claims and litigation that could adversely affect our financial condition, results of operations and cash flows; and our insurance coverage may not cover all claims or may be insufficient to cover the claims.

Despite our quality assurance measures, we may be exposed to product liability claims, other claims and litigation in the event that the use of our products results, or is alleged to result, in bodily injury and/or property damage or our products actually or allegedly fail to perform as expected. Such claims may also be accompanied by fraud and deceptive trade practices claims. While we maintain insurance coverage with respect to certain product liability and other claims, we may not be able to obtain such insurance on acceptable terms in the future, if at all, and any such insurance may not provide adequate coverage against product liability and other claims. Furthermore, our insurance may not cover damages from breach of contract by us or based on alleged fraud or deceptive trade practices. Any future damages that are not covered by insurance or are in excess of policy limits could have a material adverse effect on our financial condition, results of operations and cash flows. In addition, product liability and other claims can be expensive to defend and can divert the attention of management and other personnel for significant periods of time, regardless of the ultimate outcome.

An unsuccessful defense of a product liability or other claim could have an adverse effect on our financial condition, results of operations and cash flows. Even if we are successful in defending against a claim relating to our products, claims of this nature could cause our customers to lose confidence in our products.

Liability to customers under warranties may adversely affect our reputation, our ability to obtain future business and our results of operations.

We provide certain warranties as to the proper operation and conformance to specifications of the products we manufacture or produce. Failure of our products to operate properly or to meet specifications may increase our costs by requiring additional engineering resources and services, replacement of parts and equipment or monetary reimbursement to customers. We have in the past received warranty claims, are currently subject to warranty claims, and we expect to continue to receive warranty claims in the future. To the extent that we incur substantial warranty claims in any period, our reputation, our ability to obtain future business and our results of operations could be adversely affected.

Risks Related to our Business Model and Capital Structure

Our gross profit may be affected by shifts in our product mix.

Certain of our products have higher gross profit margins than others. Consequently, changes in the product mix of our sales from quarter-to-quarter or from year-to-year can have a significant impact on our reported gross profit margins. Certain of our products also have a much higher internally manufactured cost component. Therefore, changes from quarter-to-quarter or from year-to-year can have a significant impact on our reported gross profit margins. In addition, contracts with a higher percentage of subcontracted work or equipment purchases may result in lower gross profit margins.

Our manufacturing operations are dependent on third-party suppliers.

Although we are not dependent on any one supplier, we are dependent on the ability of our third-party suppliers to supply our raw materials, as well as certain specific component parts and sub-assemblies. The third-party suppliers upon which we depend may default on their obligations to us due to bankruptcy, insolvency, lack of liquidity, adverse economic conditions, operational failure, fraud, loss of key personnel, health-related shutdowns, or other reasons. We cannot ensure that our third-party suppliers will dedicate sufficient resources to meet our scheduled delivery requirements or that our suppliers will have sufficient resources to satisfy our requirements during any period of sustained demand. Failure of suppliers to supply, or delays in supplying, our raw materials or certain components, or allocations in the supply of certain high demand raw components, for any reason, including, without limitation, disruptions in our suppliers’ due to cybersecurity incidents, terrorist activity, public health crises, fires or other natural disasters could

materially adversely affect our operations and ability to meet our own delivery schedules on a timely and competitive basis. Additionally, our third-party suppliers may provide us with raw materials or component parts that fail to meet our expectations or the expectations of our customers, which could subject us to product liability claims, other claims and litigation.

Our use of subcontractors could potentially harm our profitability and business reputation.

Occasionally we act as a prime contractor in some of the projects we undertake. In our capacity as lead provider, and when acting as a prime contractor, we perform a portion of the work on our projects with our own resources and typically subcontract activities such as manufacturing, electrical work, concrete work, insulation, conveyors and controls. In our industry, the lead contractor is normally responsible for the performance of the entire contract, including subcontract work. Thus, when acting as a prime contractor, we are subject to risk associated with the failure of one or more subcontractors to perform as anticipated.

We employ subcontractors at various locations around the world to meet our customers’ needs in a timely manner, meet local content requirements and reduce costs. Subcontractors generally perform the majority of our manufacturing for international customers. We also utilize subcontractors in North America. The use of subcontractors decreases our control over the performance of these functions and could result in project delays, escalated costs and substandard quality. These risks could adversely affect our profitability and business reputation. In addition, many of our competitors use the same subcontractors that we use and could potentially influence our ability to hire these subcontractors. If we were to lose relationships with key subcontractors, our business could be adversely impacted.

A significant portion of our accounts receivable are related to larger contracts, which increases our exposure to credit risk.

Significant portions of our sales are to customers who place large orders for custom products and whose activities are related to the power generation and oil and gas industries. As a result, our exposure to credit risk is affected to some degree by conditions within these industries and governmental and or political conditions. We frequently attempt to reduce our exposure to credit risk by requiring progress or milestone payments and letters of credit as well as closely monitoring the credit worthiness of our customers. However, the continuing economic climate and other unanticipated events that affect our customers could have a materially adverse impact on our operating results.

Changes in billing terms can increase our exposure to working capital and credit risk.

Our products are generally sold under contracts that allow us to bill upon the completion of certain agreed-upon milestones or upon actual shipment of the product, and certain contracts include a retention provision. We attempt to negotiate progress-billing milestones on all large contracts to help us manage the working capital and credit risk associated with these large contracts. Consequently, shifts in the billing terms of the contracts in our backlog from period to period can increase our requirement for working capital and can increase our exposure to credit risk.

Currency fluctuations may reduce profits on our foreign sales or increase our costs, either of which could adversely affect our financial results.

Given that approximately 34% of our 2025 revenues are outside the United States, we are subject to the impact of fluctuations in foreign currency exchange rates. Although our financial results are reported in U.S. dollars, a portion of our sales and operating costs are realized in foreign currencies. Our sales and profitability are impacted by the movement of the U.S. dollar against foreign currencies in the countries in which we generate sales and conduct operations. Long-term fluctuations in relative currency values could have an adverse effect on our operations and financial conditions.

If our goodwill or indefinite lived intangibles become impaired, we may be required to recognize charges that would adversely impact our results of operations.

As of December 31, 2025, goodwill and indefinite lived intangibles were $297.9 million, or 33.3%, of our total assets. Goodwill and indefinite lived intangible assets are not amortized, but instead are subject to annual impairment evaluations, or more frequently if circumstances require. Major factors that influence our evaluations are estimates for future revenue and expenses associated with the specific intangible asset or the reporting unit in which the goodwill resides. This is the most sensitive of our estimates related to our evaluations. Other factors considered in our evaluations include assumptions as to the business climate, industry and economic conditions. These assumptions are subjective, and different estimates could have a significant impact on the results of our analyses. While management, based on current forecasts and outlooks, believes that the assumptions and estimates are reasonable, we can make no assurances that future actual operating results will be realized as planned and that there will not be material impairment charges as a result. In particular, an economic downturn could have a material adverse impact on our customers thereby forcing them to reduce or curtail doing business with us and such a result may materially affect the amount of cash flow generated by our future operations. Any

write-down of goodwill or intangible assets resulting from future periodic evaluations could adversely materially impact our results of operations.

We may incur costs as a result of certain restructuring activities, which may negatively impact our financial results, and we may not achieve some or all of the expected benefits of our restructuring plans.

We are continuously seeking the most cost-effective means and structure to serve our customers, protect our stockholders and respond to changes in our markets. From time to time, we may engage in restructuring activities in an effort to improve cost competitiveness and profitability. We may not achieve the desired or anticipated benefits from these restructuring activities. As a result, restructuring costs may vary significantly from year to year depending on the scope of such activities. Such restructuring costs and expenses could adversely impact our financial results.

We are party to asbestos-containing product litigation that could adversely affect our financial condition, results of operations and cash flows.

Our subsidiary Met-Pro Technologies LLC (“Met-Pro”), relative to its former Dean Pump division, has been named in asbestos-related lawsuits filed against a large number of industrial companies including, in particular, those in the pump and fluid handling industries. While we divested of the fluid handling business (also known as the Global Pump Solutions business) in the first quarter of 2025, we retained historical asbestos liabilities and the related legacy insurance policies. In management’s opinion, the complaints typically have been vague, general and speculative, alleging that Met-Pro, along with the numerous other defendants, sold asbestos-containing products and engaged in other related actions which caused injuries (including mesothelioma and death) and loss to the plaintiffs. Our insurers have hired attorneys who, together with us, are vigorously defending these cases. Many cases have been dismissed after the plaintiff fails to identify or produce evidence of exposure to Met-Pro’s products. In those cases, where evidence has been produced, our experience has been that the exposure levels are low and our position has been that its products were not a cause of death, injury or loss. We have been dismissed from a large number of these cases, with a small number of these dismissals resulting in immaterial settlements. We also presently believe that none of the pending cases will have a material impact upon our results of operations, liquidity or financial condition.

See Note 12 to the Consolidated Financial Statements contained in Part II, Item 8 of this Annual Report on Form 10-K for information regarding the asbestos-related litigation in which we are involved.

We have $214.2 million of indebtedness as of December 31, 2025, and incurrence of additional indebtedness could adversely affect our ability to operate our business, remain in compliance with debt covenants, make payments on our debt and limit our growth.

Our outstanding indebtedness could have important consequences for investors, including the following:

Our ability to meet our expenses and debt obligations will depend on our future performance, which will be affected by financial, business, economic, regulatory and other factors. We will not be able to control many of these factors. We cannot be certain that our earnings will be sufficient to allow us to pay the principal and interest on our existing or future debt and meet our other obligations. If we do not have enough money to service our existing or future debt, we may be required to refinance all or part of our existing or

future debt, sell assets, borrow more money or raise equity. We may not be able to refinance our existing or future debt, sell assets, borrow more money or raise equity on terms acceptable to us, if at all.

Our ability to execute our growth strategies may be limited by our ability to secure and retain additional financing on terms reasonably acceptable to us or at all. Certain of our competitors are larger companies that may have greater access to capital, and therefore may have a competitive advantage over us should our access to capital be limited.

We might be unable to protect our intellectual property rights and our products could infringe the intellectual property rights of others, which could expose us to costly disputes.

Although we believe that our products do not infringe patents or violate the proprietary rights of others, it is possible that our existing patent rights may not be valid or that infringement of existing or future patents or proprietary rights may occur. In the event our products infringe patents or proprietary rights of others, we may be required to modify the design of our products or obtain a license for certain technology. We cannot guarantee that we will be able to do so in a timely manner, upon acceptable terms and conditions, or at all. Failure to do any of the foregoing could have a material adverse effect upon our business. Moreover, if our products infringe patents or proprietary rights of others, we could, under certain circumstances, become liable for damages, which also could have a material adverse effect on our business.

We have made and may make future acquisitions or divestitures, which involve numerous risks that could impact our financial condition, results of operations and cash flows.

Our operating strategy has involved expanding or contracting our scope of products and services through selective acquisitions or divestitures and the formation or elimination of new business units that are then integrated or separated into or out of our family of turnkey system providers. We have acquired other businesses, product or service lines, assets or technologies that are complementary to our business. We may be unable to find or consummate future acquisitions at acceptable prices and terms. We continually evaluate potential acquisition opportunities in the ordinary course of business.

Although we conduct what we believe to be a prudent level of investigation regarding the operating and financial condition of the businesses, product or service lines, assets or technologies we purchase, an unavoidable level of risk remains regarding their actual operating and financial condition. Until we actually assume operating control of these businesses, product or service lines, assets or technologies, we may not be able to ascertain their actual value or understand potential liabilities. This is particularly true with respect to acquisitions outside the United States.

In addition, acquisitions of businesses may require additional debt or equity financing, resulting in additional leverage or dilution of ownership. Our Credit Facility contains certain covenants that limit, or which may have the effect of limiting, among other things, acquisitions, capital expenditures, the sale of assets and the incurrence of additional indebtedness.

Societal responses to climate change could adversely affect our business and performance, including indirectly through impacts on our customers.

Concerns over the long-term impacts of climate change have led and will continue to lead to governmental efforts around the world to mitigate those impacts. Consumers and businesses also may change their behavior as a result of these concerns. We and our customers will need to respond to new laws and regulations as well as consumer and business preferences resulting from climate change concerns. We and our customers may face cost increases, asset value reductions and operating process changes. The impact on our customers will likely vary depending on their specific attributes, including reliance on or role in carbon intensive activities. Among the impacts on us could be a drop in demand for our products and services, particularly in oil and gas industries. In addition, we could face reductions in our creditworthiness or in the value of our assets securing loans. Our efforts to take these risks into account in making business decisions, including by increasing our business with climate-friendly companies, may not be effective in protecting us from the negative impact of new laws and regulations or changes in consumer or business behavior.

Global climate change and related emphasis on environmental, social and governance ("ESG") matters by various stakeholders could negatively affect our business.

Customer, investor and employee expectations relating to ESG have been rapidly evolving. In addition, certain government organizations are enhancing or advancing legal and regulatory requirements specific to ESG matters. The heightened stakeholder focus on ESG issues related to our business requires the continuous monitoring of various and evolving laws, regulations, standards and expectations and the associated reporting requirements. A failure to adequately meet stakeholder expectations may result in noncompliance, the loss of business, reputational impacts, diluted market valuation, an inability to attract customers, and an inability

to attract and retain top talent. In addition, our adoption of certain standards or mandated compliance to certain requirements could necessitate additional investments that could impact our profitability.

Climate changes, such as extreme weather conditions, create financial risk to our business. Global physical climate changes, including unseasonable weather conditions, could result in reduced demand or product obsolescence for certain of our customers’ products and/or price modifications for our customers’ products and the resources needed to produce them. This could in turn put pressure on our manufacturing costs and result in reduced profit margin associated with certain of our customer programs, or loss of customer programs that we may not be able to replace.

Risks Related to Human Capital Management

The loss of key personnel or inability to attract and retain additional personnel could affect our ability to successfully grow our business.

Our future success depends upon the continued service of our executive officers and other key business leaders and technical personnel, and on our ability to continue to identify, attract, retain and motivate them. Implementing our business strategy requires specialized engineering and other talent, as our revenues are highly dependent on technological and product innovations. The market for employees in our industry is extremely competitive, and competition for talent, particularly engineering talent, increasingly attempt to hire, and to varying degrees have been successful in hiring, our employees. If we are unable to attract and retain qualified employees, our business may be harmed.

Work stoppages or similar difficulties could significantly disrupt our operations.

Approximately 250 of our approximately 1,540 employees are represented by international or independent labor unions under various union contracts, which, for our covered employees in the United States, are set to renegotiate collective bargaining agreements in the first half of 2026. It is possible that our workforce will become more unionized in the future. Although we consider our employee relations to generally be good, our existing labor agreements may not prevent a strike or work stoppage at one or more of our facilities, which may have a material adverse effect on our business. Unionization activities could also increase our costs, which could have an adverse effect on our profitability.

Additionally, a work stoppage at one of our suppliers could adversely affect our operations if an alternative source of supply were not readily available. Work stoppages by employees of our customers also could result in reduced demand for our products.

Information Technology and Cybersecurity Risks

Our dependence on information systems and the failure of such systems, could significantly disrupt our business and negatively affect our financial condition, results of operations and cash flows.

We are highly dependent on information systems that are increasingly operated by third parties and as a result we have a limited ability to ensure their continued operation. We rely on information technology systems, networks and infrastructure in managing our day-to-day operations. In the event of systems failure or interruption, whether caused by natural disasters, telecommunications outages, cyberattacks, criminal acts, or other cybersecurity incidents, we may have limited ability to control the timing and effectiveness of system restoration. Any resulting disruption to our operations could materially and adversely affect our business, financial condition, and results of operations.

In addition to risks posed by our direct third-party suppliers, we are exposed to fourth-party cybersecurity risks, which arise from the subcontractors and service providers engaged by those suppliers. These entities often have access to critical systems or sensitive data through interconnected supply chains, creating vulnerabilities beyond our immediate control. A security breach or operational failure at a fourth-party provider could compromise our data integrity, disrupt services, or lead to regulatory non-compliance, even if our direct suppliers maintain strong security practices. Because visibility and oversight of these extended relationships are limited, the likelihood of undetected vulnerabilities increases, amplifying potential financial, operational, and reputational impacts.

Artificial Intelligence integration by third-party suppliers could pose a risk to our systems, networks, and products.

Our reliance on third-party suppliers introduces additional risks as these suppliers increasingly incorporate artificial intelligence ("AI") technologies into their products and services. While AI tools may enhance functionality and efficiency, they can also create operational complexities and unforeseen limitations. These changes may affect suppliers’ ability to maintain consistent service levels, ensure reliability, and deliver the expected user experience. Furthermore, AI-driven processes may introduce new cybersecurity vulnerabilities, compliance challenges, and ethical considerations that could impact our business operations. Because we have limited

control over how suppliers implement and manage AI technologies, any deficiencies or failures in these systems could result in service disruptions, data integrity issues, or reputational harm.

Increased information technology cybersecurity threats and more sophisticated and targeted computer crime could pose a risk to our systems, networks, and products.

Increased global information technology cybersecurity threats and more sophisticated and targeted computer crime, including utilization of generative artificial intelligence, pose a risk to the security of our systems and networks and the confidentiality, availability and integrity of our data and communications. While we attempt to mitigate these risks by employing a number of measures, including employee training, comprehensive monitoring of our networks and systems, and maintenance of backup and protective systems, our systems, networks and products remain potentially vulnerable to advanced persistent threats. Depending on their nature and scope, such threats could potentially lead to the compromise of confidential information and communications, improper use of our systems and networks, manipulation and destruction of data, defective products, production downtimes, and operational disruptions, which in turn could adversely affect our reputation, competitiveness and results of operations. We have cybersecurity insurance related to a breach event covering expenses for notification, credit monitoring, investigation, crisis management, public relations and legal advice. However, damage and claims arising from such incidents may not be covered or exceed the amount of any insurance available or may result in increased cybersecurity and other insurance premiums. In response to an increased reliance on our information technology systems, we have taken proactive measures to strengthen our information technology systems, including completion of a National Institute of Standards and Technology assessment, upgraded security patches across all servers, development of best-in-class hack protection service, implementation of recurring company-wide security training and enablement of advanced security for our major information systems. Management provides the Audit Committee with regular cybersecurity program updates including cybersecurity posture, risk management activities, and emerging risk.

Furthermore, the Company may have access to sensitive, confidential, or personal data or information that may be subject to privacy and security laws, regulations, or other contractually-imposed controls. Despite our use of reasonable and appropriate controls, material security breaches, theft, misplaced, lost or corrupted data, programming, or employee errors and/or malfeasance could lead to the compromise or improper use of such sensitive, confidential, or personal data or information, resulting in possible negative consequences, such as fines, ransom demands, penalties, loss of reputation, competitiveness or customers, or other negative consequences resulting in adverse impacts to our results of operations or financial condition.

Regulatory Compliance and International Operations Risks

Disruptions in the political, regulatory, economic and social conditions of the countries in which we conduct business could negatively impact our business, financial condition and profits.

We operate and do business in many countries in addition to the United States. For the year ended December 31, 2025, approximately 34% of our total revenue was derived from products or services ultimately delivered or provided to end users outside the United States. As part of our operating strategy, we intend to expand our international operations through internal growth and selected acquisitions. Operations outside of the United States, particularly in emerging markets, are subject to a variety of risks that are different from or are in addition to the risks we face within the United States. Among others, these risks include local, economic, political, and social conditions, including potential hyperinflationary conditions and political instability in certain countries; tax-related risks, including the imposition of taxes and the lack of beneficial treaties, that result in a higher effective tax rate for us; imposition of limitations on the remittance of dividends and payments by foreign subsidiaries; difficulties in enforcing agreements and collecting receivables through certain foreign local systems; domestic and foreign customs, tariffs, and quotas or other trade barriers; risk of nationalization of private enterprises by foreign governments; managing and obtaining support and distribution channels for overseas operations; hiring and retaining qualified management personnel for our overseas operations; and the results of new trade agreements and changes in membership to international coalitions or unions.

We are also exposed to risks relating to U.S. policy with respect to companies doing business in foreign jurisdictions. Changes in laws or policies governing the terms of foreign trade, in particular increased trade restrictions, tariffs or taxes on import from countries where we procure or manufacture products, such as China, could have a material adverse effect on our business and results of operations. For instance, the U.S. and Chinese governments have imposed a series of significant incremental retaliatory tariffs to certain imported goods. Given the uncertainty regarding the duration of the imposed tariffs, as well as the potential for additional tariffs by the U.S., China or other countries, as well as other changes in tax policy, trade regulations or trade agreements, and the Company’s ability to implement strategies to mitigate the impact of changes in tax policy, tariffs or other trade regulations, our exposure to the risks described above could have a material adverse effect on our business and results of operations.

In addition, compliance with foreign and domestic legal and regulatory requirements, including import, export, defense regulations and foreign exchange controls and anti-corruption laws, as discussed below, such as the FCPA (as defined below), the U.K. Bribery

Act (as defined below), the European Union’s General Data Protection Regulations and similar laws of other jurisdictions, could adversely impact our ability to compete against companies in such jurisdictions. Moreover, the violation of such laws or regulations, by us or our representatives, could result in severe penalties including monetary fines, criminal proceedings and suspension of export privileges.

The occurrence of one or more of the foregoing factors could have a material adverse effect on our international operations or upon our financial condition, results of operations and cash flows.

We could be adversely affected by violations of the U.S. Foreign Corrupt Practices Act and similar anti-bribery laws worldwide.

The U.S. Foreign Corrupt Practices Act ("FCPA"), the U.K. Bribery Act of 2010 ("U.K. Bribery Act"), and similar anti-bribery laws in other jurisdictions generally prohibit companies and their intermediaries from making improper payments for the purpose of obtaining or retaining business. Our policies mandate compliance with these anti-bribery laws. We operate in many parts of the world that have experienced governmental corruption to some degree and, in certain circumstances, strict compliance with anti-bribery laws may conflict with local customs and practices. Despite our training and compliance programs, there is no assurance that our internal control policies and procedures will protect us from acts committed by our employees or agents. If we are found to be liable for FCPA, U.K. Bribery Act or other similar violations, either due to our own acts or due to the acts of others, we could be subject to civil and criminal penalties or other sanctions, which could have a material adverse impact on our business, financial condition, and profits.

Our business can be significantly affected by changes in regulatory standards.

The markets that the Company serves are characterized by competitively imposed process standards and regulatory requirements, each of which influences the demand for our products and services. Changes in legislative, regulatory or industrial requirements may render certain of our products and processes obsolete. Conversely, these changes may present new business opportunities for us. Acceptance of new products and services may also be affected by the adoption of new government regulations requiring stricter standards. Our ability to anticipate changes in regulatory standards and to respond with new and enhanced products on a timely basis will be a significant factor in our ability to grow and to remain competitive. We cannot guarantee that we will be able to achieve the technological advances that may be necessary for us to remain competitive or that certain of our products or services will not become obsolete.

Changes in current environmental legislation and enforcement could have an adverse impact on the sale of our environmental control systems and products and on our financial condition, results of operations and cash flows.

Our business is primarily driven by capital spending, clean air rules, plant upgrades by our customers to comply with laws and regulations governing the discharge of pollutants into the environment or otherwise relating to the protection of the environment or human health. These laws include, but are not limited to, United States federal statutes such as the Resource Conservation and Recovery Act of 1976, the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, the Clean Water Act, the Clean Air Act, the Clean Air Interstate Rule, and the regulations implementing these statutes, as well as similar laws and regulations at state and local levels and in other countries. These United States laws and regulations may change and other countries may not adopt similar laws and regulations. Our business may be adversely impacted to the extent that environmental regulations are repealed, amended, implementation dates are delayed, or to the extent that regulatory authorities reduce enforcement.

Changes in laws or regulations or the manner of their interpretation or enforcement could adversely impact our financial performance and restrict our ability to operate our business or execute our strategies.

New laws or regulations, or changes in existing laws or regulations, or the manner of their interpretation or enforcement, could increase our cost of doing business and restrict our ability to operate our business or execute our strategies. In particular, there is continued uncertainty with respect to United States trade policies, treaties, government regulations and tariffs. Any changes the Trump administration makes to United States administrative policy could result in changes to existing trade agreements, greater restrictions on free trade generally and significant increases in tariffs on goods imported into the United States, particularly tariffs on products manufactured in Mexico and China, among other possible changes. A trade war or other governmental action related to tariffs or international trade agreements, and any resulting negative sentiments towards the United States as a result thereof, would likely have an adverse effect on our international operations or upon our business, financial condition, results of operations and cash flows.

Risks Related to Our Common Stock

The market price of our common stock may be volatile or may decline regardless of our operating performance and investors may not be able to resell shares they purchase at their purchase price.

The stock market has experienced and may in the future experience volatility that has often been unrelated to the operating performance of particular companies. The market price of our common stock has experienced, and may continue to experience, substantial volatility. During 2025, the price of our common stock on the NASDAQ ranged from $17.97 to $62.51 per share. We expect our common stock to continue to be subject to fluctuations. Broad market and industry factors may adversely affect the market price of our common stock, regardless of our actual operating performance. Factors that could cause fluctuation in the common stock price may include, among other things:

The realization of any of these risks and other factors beyond our control could cause the market price of our common stock to decline significantly.

We are not currently paying dividends and cannot make assurances that we will pay dividends on our common stock and our indebtedness could limit our ability to pay dividends.

The timing, declaration, amount and payment of future dividends to our stockholders fall within the discretion of our Board of Directors and will depend on many factors, including our financial condition, results of operations and capital requirements, as well as applicable legal or regulatory constraints, industry practice and other business considerations that our Board of Directors considers relevant. We have not paid a cash dividend on our common stock in recent years and currently intend to retain future earnings, if any, to finance the operations, growth and development of our business into the foreseeable future.

Our ability to issue preferred stock could adversely affect the rights of holders of our common stock.

Our certificate of incorporation authorizes us to issue up to 10,000 shares of preferred stock in one or more series on terms that may be determined at the time of issuance by our Board of Directors. Accordingly, we may issue shares of any series of preferred stock that would rank senior to our common stock as to voting or dividend rights or rights upon our liquidation, dissolution or winding up.

Certain provisions in our charter documents have anti-takeover effects.

Certain provisions of our certificate of incorporation and bylaws may have the effect of delaying, deferring or preventing a change in control of us. Such provisions, including those limiting who may call special stockholders’ meetings, together with the possible issuance of our preferred stock without stockholder approval, may make it more difficult for other persons, without the approval of our Board of Directors, to make a tender offer or otherwise acquire substantial amounts of our common stock or to launch other takeover attempts that a stockholder might consider to be in such stockholder’s best interest.

Risks Related to Internal Control over Financial Reporting

We have identified material weaknesses in our internal control over financial reporting. If we are unable to remediate these material weaknesses and maintain adequate internal controls, we may not be able to accurately report our financial results in a timely manner, which may adversely affect investor confidence in us and materially and adversely affect our business.

Under Section 404 of the Sarbanes-Oxley Act of 2002, we are required to include in each of our Annual Reports on Form 10-K a report containing our management's assessment of the effectiveness of our internal control over financial reporting and an attestation report of our independent auditor. These laws, rules and regulations continue to evolve and could become increasingly stringent in the future. We have undertaken actions to enhance our ability to comply with the requirements of the Sarbanes-Oxley Act of 2002, including, but not limited to, the engagement of consultants, the documentation of existing controls and the implementation of new controls or modification of existing controls as deemed appropriate.

We continue to devote substantial time and resources to the documentation and testing of our controls, and to plan for and the implementation of remedial efforts in those instances where remediation is indicated.

As disclosed in Item 9A. "Controls and Procedures" in this Annual Report on Form 10-K, we have identified material weaknesses in our internal control over financial reporting related to various control deficiencies at the Verantis Environmental Solutions Group business that we acquired in December 2024, as well our assessment of completeness and accuracy of information used in the execution of controls relating to balance sheet reconciliations. The material weaknesses did not result in any misstatements to our consolidated financial statements; however, they could result in a misstatement of account balances or disclosures that would result in a material misstatement to the annual or interim financial statements that would not be prevented or detected.

To address these material weaknesses, we have developed a remediation plan that includes updating control documentation, expanding education and training, and ensuring that controls are prepared and reviewed at the appropriate level of precision; hiring accounting and finance personnel with the requisite skills and expertise to perform control activities related to the financial close process and augmenting our internal resources by engaging external consultants with technical experience in accounting, financial reporting, and internal controls, until we add sufficient in-house skills to our staff; focusing on enhancing our information technology controls, specifically the assessment and integration of such controls at newly acquired entities; and developing an enhanced monitoring program to evaluate and assess whether controls are present and functioning in a timely manner and holding individuals accountable for their internal control responsibilities. As of December 31, 2025, these remediation efforts are ongoing.

The actions that we are taking are subject to ongoing senior management review, as well as Audit Committee oversight. We will not be able to conclude whether the steps we are taking will fully remediate material weaknesses in our internal control over financial reporting until we have completed our remediation efforts and subsequent evaluation of their effectiveness. Until these material weaknesses are remediated, we plan to continue to perform additional analyses and other procedures to ensure that our consolidated financial statements are prepared in accordance with GAAP.

If we are unable to remediate these material weaknesses, or if we fail to develop and maintain adequate internal controls in the future, including remediating any material weaknesses or deficiencies in our internal controls, we could be subject to regulatory actions, civil or criminal penalties or stockholder litigation. In addition, failure to maintain adequate internal controls could result in financial statements that do not accurately reflect our financial condition, results of operations and cash flows. We believe that the out-of-pocket costs, the diversion of management's attention from running our day-to-day operations and operational changes caused by the need to comply with the requirements of Section 404 of the Sarbanes-Oxley Act of 2002 will continue to be significant.

There are inherent limitations in all internal control systems over financial reporting, and misstatements due to error or fraud may occur and not be detected.

While we continue to take action to ensure compliance with the internal control, disclosure control and other requirements of the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated thereunder by the SEC, there are inherent limitations in our ability to control all circumstances. Our management, including our Chief Executive Officer and Chief Financial Officer, do not expect that our internal controls and disclosure controls can prevent all errors and all frauds. A control system, no matter how well conceived and operated, can provide only reasonable assurance that the objectives of the control system are met. In addition, the design of a control system must reflect the fact that there are resource constraints and the benefit of controls must be evaluated in relation 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, if any, have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty and that breakdowns can occur because of simple error or mistake. Further, controls can be circumvented by individual acts of some persons, by collusion of two or more persons or by management override of the controls. 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, a control may be inadequate because of changes in conditions or the degree of compliance with the policies or procedures may deteriorate. Because of inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

If we are not able to establish and maintain effective internal control over financial reporting, including any failure to implement required new or improved controls, or if we experience difficulties in their implementation, our business, financial condition and operating results could be harmed. We can give no assurances that any additional material weaknesses will not arise in the future due to our failure to implement and maintain adequate internal control over financial reporting.

Risks Related to the Proposed Transaction with Thermon Group Holdings, Inc.

The proposed transaction may not be completed on the anticipated timeline, or at all, which could adversely affect our business, financial condition, results of operations and the market price of our common stock.

On February 23, 2026, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Longhorn Merger Sub, Inc. and Longhorn Merger Sub LLC, each a direct wholly owned subsidiary of the Company (together, the “Merger Subs”), and Thermon Group Holdings, Inc. (“Thermon”), pursuant to which the parties agreed to effect a two-step merger transaction contemplated thereby (the “Merger”). Although we expect to complete the Merger in 2026, there can be no assurances as to the exact timing of the closing or that the Merger will be completed at all. The consummation of the Merger is subject to the satisfaction or waiver of a number of conditions contained in the related Merger Agreement, including, among others, approval by the Company’s and Thermon’s stockholders, the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, the effectiveness of a registration statement on Form S-4 to be filed by the Company, approval for listing on Nasdaq of the shares of Company common stock to be issued in the transaction, and other customary regulatory approvals and conditions. Such conditions, some of which are beyond our control, may not be satisfied or waived in a timely manner or at all and therefore make the completion and timing of the Merger uncertain. In addition, the Merger Agreement contains certain termination rights for both parties, which if exercised will also result in the Merger not being consummated. Any such termination or any failure to otherwise complete the Merger could result in various consequences, including, among others: our business being adversely impacted by the failure to pursue other beneficial opportunities due to the time and resources committed by our management to the Merger, without realizing any of the benefits of completing the Merger; incurring significant legal, accounting and other expenses relating to the Merger without realizing any of its anticipated benefits; the market price of our common stock being adversely impacted to the extent that the current market price reflects a market assumption that the Merger will be completed; and negative reactions from the financial markets and customers that may occur if the anticipated benefits of the Merger are not realized. Such consequences could have a material adverse effect on our business, financial condition, or results of operations.

The Merger Agreement restricts our ability to pursue alternative transactions and may require us to pay a termination fee under certain circumstances.

The Merger Agreement contains customary non-solicitation provisions that limit our ability to solicit or engage in discussions regarding alternative acquisition proposals, subject to certain fiduciary exceptions. If the Merger Agreement is terminated under certain specified circumstances, including in connection with a competing acquisition proposal, we may be required to pay a termination fee to Thermon. These provisions could discourage other potential strategic transactions that may be favorable to the Company and its stockholders.

Even if the Merger is completed, we may be unable to successfully integrate Thermon’s business or realize the anticipated benefits of the proposed transaction, which may have a material adverse effect on our business, financial condition or results of operations.

The success of the Merger depends in part on whether we can complete the integration of the Thermon assets that we have not previously operated into our existing business in an efficient and effective manner, and there can be no assurance that we will be able to successfully integrate or otherwise realize the anticipated benefits of the Merger. The integration process may result in the disruption of ongoing business and there could be potential unknown liabilities and unforeseen expenses associated with the Merger that were not discovered in the course of performing due diligence. The integration may also require significant time and focus from management following the Merger that may disrupt our business and results of operations. Potential risks or difficulties include, among others:

Any of these issues could adversely affect our ability to maintain relationships with customers, suppliers, employees, and other constituencies. We may fail to realize the anticipated benefits expected from the Merger. The success of the Merger will depend, in significant part, on our ability to successfully complete the integration of the acquired assets, grow the revenue, and realize the anticipated strategic benefits from the Merger. The anticipated benefits of the Merger may not be realized fully or at all or may take longer to realize than expected. Actual operating, technological, strategic, and revenue opportunities, if achieved at all, may be less significant than expected or may take longer to achieve than anticipated. If we are not able to realize the anticipated benefits expected from the Merger within the anticipated timing or at all, our business and operating results may be adversely affected.

The issuance of shares of the Company’s common stock in connection with the merger will dilute existing stockholders and may adversely affect the market price of our common stock.

In connection with the Merger, we expect to issue a substantial number of shares of our common stock to the stockholders of Thermon, the actual number of which will be determined at closing based on the number of shares and equity awards of Thermon outstanding at that time and subject to proration and election procedures set forth in the Merger Agreement. The issuance of these additional shares will dilute the ownership interest of the Company’s existing stockholders and may dilute earnings per share. Any such dilution, or any delay in achieving accretion to earnings per share, could cause the market price of our common stock to decline or increase at a reduced rate.

We have incurred additional costs in connection with the Merger, which will continue during 2026.

We have incurred and expect to incur significant costs in connection with the Merger, including legal, accounting, financial advisory and other expenses, and we may incur additional costs in connection with integration. Although we expect that the elimination of any duplicative costs, as well as the realization of expected benefits related to the integration of the Thermon assets, should allow us to offset these transaction costs over time, this net benefit may not be achieved in the near term or at all. We also expect to fund any cash portion of the Merger Consideration and related transaction costs with available cash and borrowings under our existing credit facilities, which may increase our indebtedness and reduce financial flexibility

Securities class action and derivative lawsuits may be brought against us in connection with the Merger, which could result in substantial costs.

Securities class action lawsuits and derivative lawsuits are often brought against public companies that have entered into acquisition, merger, or other business combination agreements. Even if such a lawsuit is without merit, defending against these claims can result in substantial costs and divert management time and resources. An adverse judgment could result in monetary damages, which could have a negative impact on our liquidity and financial condition.

Item 1B. Unresolved Staff Comments

Not applicable.

Item 2. Properties

The Company has 51 principal operating facilities across 13 states and 10 countries. The Company’s executive offices are located in Addison, Texas. We maintain our facilities in good operating condition, and we believe they are suitable and adequate for the purposes for which they are intended to conduct business. Our current capacity, with limited capital additions, is expected to be sufficient to meet production requirements for the near future. It is anticipated that most leases coming due in the near future will be renewed at expiration. The property we own is subject to collateral mortgages to secure the amounts owed under the Credit Facility. Information on the number and location of principal operating facilities by segment was as follows as of December 31, 2025:

Item 3. Legal Proceedings

See Note 12 to the Consolidated Financial Statements contained in Part II, Item 8 of this Annual Report on Form 10-K for information regarding legal proceedings in which we are involved.

Item 4. Mine Safety Disclosures

Not applicable.

PART II

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

Market Information

Our common stock is traded on The Nasdaq Global Select Market under the symbol “CECO.”

Performance Graph

The following graph sets forth the cumulative total return to CECO’s stockholders during the five years ended December 31, 2025, as well as the following indices: Russell 2000 Index, Standard and Poor’s (“S&P”) 600 Small Cap Industrial Machinery Index, and S&P 500 Index. The following graph assumes $100 was invested on December 31, 2020, including the reinvestment of dividends, in each category.

Dividends

The timing, declaration, amount and payment of future dividends to our stockholders fall within the discretion of our Board of Directors and will depend on many factors, including our financial condition, results of operations and capital requirements, as well as applicable legal or regulatory constraints, industry practice and other business considerations that our Board of Directors considers relevant. We have not paid a cash dividend on our common stock in recent years and currently intend to retain future earnings, if any, to finance the operations, growth and development of our business into the foreseeable future, or for other uses such as the continuation of our share repurchase program. Payment of dividends is also subject to the continuing compliance with our financial covenants under our Credit Facility.

Holders

The approximate number of registered stockholders of record of our common stock as of February 18, 2026 was 230, although there is a larger number of beneficial owners.

Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table provides information about our purchases of our equity securities for the quarter ended December 31, 2025.

(1) On May 10, 2022, the Board of Directors authorized a $20.0 million share repurchase program as described within Note 9 to the Consolidated Financial Statements. The program expired on April 30, 2025.

Recent Sales of Unregistered Securities

Not applicable.

Item 6. [Reserved]

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

Management’s discussion and analysis (“MD&A”) should be read in conjunction with the consolidated financial statements and accompanying notes included in Item 8 of this Annual Report on Form 10-K, which include additional information about our accounting policies, practices and the transactions underlying our financial results. The preparation of our consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts in our consolidated financial statements and the accompanying notes including various claims and contingencies related to lawsuits, taxes, environmental and other matters arising during the normal course of business. We apply our best judgment, our knowledge of existing facts and circumstances and actions that we may undertake in the future in determining the estimates that affect our consolidated financial statements. We evaluate our estimates on an ongoing basis using our historical experience, as well as other factors we believe appropriate under the circumstances, such as current economic conditions, and adjust or revise our estimates as circumstances change. As future events and their effects cannot be determined with precision, actual results may differ from these estimates.

Overview

Business Overview

CECO is an environmentally focused, diversified industrial company, serving the broad landscape of industrial air, industrial water and energy transition markets globally by providing innovative technology and application expertise. We help companies grow their business with safe, clean, and more efficient solutions that help protect people, the environment and industrial equipment. Our solutions improve air and water quality, optimize emissions management, and increase the energy and process efficiency for highly engineered applications in power generation, midstream and downstream hydrocarbon processing and transport, chemical processing, electric vehicle production, polysilicon fabrication, semiconductor and electronics production, battery production and recycling, specialty metals, aluminum and steel production, beverage can manufacturing, and industrial and produced water and wastewater treatment, and a wide range of other industrial end markets.

Industry Trends and Corporate Strategy

We are a global corporation with worldwide operations. As a global business, our operations are affected by worldwide, regional and industry-specific economic factors, wherever we operate or do business. Our geographic and industry diversity, and the breadth of our product and services portfolio, have helped mitigate the impact of any one industry or the economy of any single country on our consolidated operating results.

We believe growth for our products and services is driven by the increase in demand for air quality and water treatment solutions, the energy transition, a shift towards cleaner sources of fuel such as natural gas, hydrogen, nuclear, and renewable sources, and increased awareness of our customers about corporate social responsibility and interest to procure equipment and solutions that protects employees, the environment and their industrial equipment.

With a shift to cleaner, more environmentally responsible power generation, power providers and industrial power consumers are building new facilities that use cleaner fuels. In developed markets, natural gas is the largest source of electricity generation. We supply product offerings throughout the entire natural gas value chain and believe expansion will drive growth within our Engineered Systems segment for our gas separation & filtration, pressure products, acoustical equipment , water treatment solutions and DeNOx selective catalytic reduction ("SCR") systems for natural-gas-fired power plants. Increases in global natural gas, installed miles of new pipeline, including future CO2 and hydrogen pipelines, and liquified natural gas demand and supply all stand to drive the need for our products.

We also believe there is a growing demand to control and reduce air and water emissions from industrial facilities for which our pollution control equipment will serve. In 2021, the US Congress passed the Infrastructure Investment and Jobs Act with $550 billion of new federal spending aimed at rebuilding roads and bridges, climate resilience, and other environmental initiatives. Similar investments are being made in many other countries in which we do business. As industrial capital expenditures grow, corporations are seeking to do so with a smaller environmental impact. These regulatory and economic tailwinds coupled with shareholder pressure on companies to improve their sustainability and reduce their global carbon footprint serve as catalysts for a growing set of opportunities for our portfolio of equipment and solutions.

We continue to focus on increasing revenues and profitability in developing markets, where environmental awareness and associated regulatory standards are increasing, while continuing to strengthen and expand our product offerings and channels in our domestic market of the United States. Our enterprise strategy consists of a combined operational strategy and capital allocation strategy.

Our operational strategy is implemented through our technology and application-based platforms aligned around target customers and end markets where our solutions are particularly valuable. Core elements of our operational strategy are commercial and operational excellence, margin expansion, recurring revenue growth, cash flow generation, product management, and project management execution.

Our capital allocation strategy supports the growth and value creation generated by our operational strategy. We will focus our capital deployment on building out our leading industrial air solutions portfolio, advancing our emerging industrial water treatment position, and supporting our customers as they make the transition to cleaner more sustainable forms of energy, while also shifting our portfolio mix towards businesses with more recurring revenue and more predictable cash flows, strong secular growth trends and less cyclicality. While the primary focuses of our capital allocation strategy is organic growth and portfolio management, the Company closely monitors its leverage and debt repayment strategies.

Market Pressures

The senior management team monitors and manages the Company's ability to operate effectively as the result of market pressures. Against the current backdrop of a rapidly evolving global commercial environment, we believe we are comparatively well-positioned as we execute and manufacture a majority of our business in the same regions in which we sell, with our cost and revenue bases largely aligned as a result. Recently, international trade has been impacted by geopolitical tariff considerations. To mitigate potential tariff-related impacts, we have worked strategically with customers and suppliers to optimize terms and pricing, sourcing locations, and logistics routes and schedules. While we will continue to take a proactive approach on our efforts to mitigate the impacts of tariffs, our business and results could be adversely affected by further policy developments. We could experience shortages of raw materials and additional inflationary pressures for certain materials and labor. We have secured raw materials from existing and alternate suppliers and have taken other mitigating actions to mitigate supply disruptions; however, we cannot guarantee that we will be able to continue to do so in the future. If we are unable to continue to mitigate the effects of these supply disruptions and/or inflationary pressures, our business, results and financial condition could be affected.

Recent Developments

Proposed Transaction with Thermon Group Holdings, Inc.

On February 23, 2026, the Company entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Longhorn Merger Sub, Inc. and Longhorn Merger Sub LLC, each a direct wholly owned subsidiary of the Company (together, the “Merger Subs”), and Thermon Group Holdings, Inc. (“Thermon”), pursuant to which CECO will acquire Thermon in a cash and stock transaction. The acquisition will be effected pursuant to a two-step merger transaction as contemplated by the Merger Agreement (the “Merger”). The consummation of the Merger is subject to the satisfaction or waiver of customary closing conditions, including, among others, approval by the Company’s stockholders and Thermon’s stockholders, the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, the effectiveness of a registration statement on Form S-4 to be filed by the Company, and other customary regulatory approvals and conditions.

We expect to fund any cash portion of the Merger Consideration and related transaction costs with available cash and borrowings under our existing and/or committed credit facilities. We expect to incur significant costs in connection with the transaction, including legal, accounting, financial advisory and other expenses, and additional costs may be incurred in connection with integration planning and execution. For a description of risks related to the proposed transaction, see "Part I—Item 1A. Risk Factors—Risks Related to the Proposed Transaction with Thermon Group Holdings, Inc." and for additional details regarding the proposed transaction, see Note 17 to the Consolidated Financial Statements contained in Part II, Item 8 of this Annual Report on Form 10-K.

Operations Overview

Our segments consist of like end-market and end-market adjacent platforms. Our platforms are structured to win in their target markets with a core focus on understanding customer needs and providing best-in-class solutions. Our business model provides scalable efficiencies enabling us to serve our customers with a variety of products that we typically classify into three categories: make-to-order, configure-to-order, and engineer-to-order. For our project-based platforms, we leverage third-party subcontract fabrication partners in a global network to execute for our customers world-wide. Our platforms are focused on sales, application engineering, product management, project management, and supply chain execution for our customers.

Our operations management team has distinct industry expertise coupled with strong leadership skills resulting in a customer-first mindset across the business. Our operations management team works closely with our Chief Executive Officer on global fulfillment strategies, operational excellence, resource allocation, and employee development.

Within our segments, we have monthly business reviews to ensure we are serving customers, achieving our operating plan, and executing on strategic growth initiatives. These reviews include, but are not limited to pipeline reviews, quotation reviews, project management reviews, financial performance, manufacturing scorecards, safety, and customer feedback. In these reviews we focus on metrics such as quality, customer satisfaction, on-time-delivery, lead-times, price, inflation, project margins, backlog, and above all, safety.

In support of the segments, centralized teams provide back-office functions for scale, efficiency, and compliance. These key functions include: accounting, treasury, tax, payroll, human resources and total rewards management, legal, information technology, marketing, and internal control over financial reporting. We have excellent collaboration between our segments and our centralized service teams ensuring optimal efficiency and alignment on growth and improvement initiatives.

Our reportable segments are:

Our contracts are obtained either through customer upselling based on our leading brands and significant install base, competitive bidding or as a result of negotiations with our customers. Contract terms offered by us are generally dependent on the complexity and risk of the project as well as the resources that will be required to complete the project. Our focus is on increasing our operating margins as well as our gross margin percentage, which translates into stronger operating results.

Our cost of sales is principally driven by a number of factors, including material and subcontract prices and labor cost and availability. Changes in these factors may have a material impact on our overall gross profit margins.

We break down costs of sales into five categories, as follows:

In general, subcontracts are the highest percentage of costs and also the most flexible followed by labor, material, and equipment. Due to the project nature and global orientation of several of our platforms, leveraging subcontract fabrication partners close to our customers increases our ability to meet customer delivery expectations at market competitive pricing. In periods where orders are infrequent, we do not have to maintain the fixed cost of a manufacturing plant. Across our various product lines, the relative relationships of these cost categories change and cause variations in gross margin percentage. Material and labor costs can increase quickly, which also reduces gross margin percentage. As material cost inflation occurs, we seek to pass this cost onto our customers as price increases.

Selling and administrative expense principally includes sales and engineering payroll and related fringes, advertising and marketing expenditures as well as all corporate and administrative functions and other costs that support our operations. Variable compensation based on the Company’s performance is included in selling and administrative expense. An advantage of our operating model is that as revenue grows, we have significant operating leverage on our fixed selling and administrative cost structure.

Note Regarding Use of Non-GAAP Financial Measures

The Company’s consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). These GAAP financial statements include certain charges the Company believes are not indicative of its core ongoing operational performance.

As a result, the Company provides financial information in this MD&A that was not prepared in accordance with GAAP and should not be considered as an alternative to the information prepared in accordance with GAAP. We believe these non-GAAP measures are useful to investors and management in evaluating the Company's ongoing financial performance, and the Company believes they provide greater transparency to investors as supplemental information to its GAAP results.

The Company has provided the non-GAAP financial measures including non-GAAP operating income, non-GAAP operating margin, and non-GAAP net income as a result of adjustments for items that the Company believes are not indicative of its ongoing operations. These items include charges associated with the Company’s acquisitions, divestiture, and the items described below in “Consolidated Results.” The Company believes that these items are not necessarily indicative of the Company’s ongoing operations and their exclusion provides individuals with additional information to better compare the Company's results over multiple periods. The Company utilizes this information to evaluate its ongoing financial performance. The Company has incurred substantial expense and income associated with acquisitions. While the Company cannot predict the exact timing or amounts of such charges, it does expect to treat the financial impact of these transactions as special items in its future presentation of non-GAAP results.

Results of Operations

Consolidated Results

Our consolidated statements of income for the years ended December 31, 2025, 2024 and 2023 are as follows:

Non-GAAP Measures

To compare operating performance between the years ended December 31, 2025, 2024 and 2023 the Company has adjusted GAAP operating income to exclude (1) amortization of intangible assets, (2) acquisition and integration expenses, which include legal, accounting, and other expenses, (3) gain on the sale of the Global Pump Solutions business, and (4) other non-recurring expenses, including fair value adjustment of earn-out liabilities from the acquisitions of WK Group, restructuring expenses primarily relating to severance, facility exits, and associated legal expenses, asbestos litigation expenses relating to future settlement payments, and third party professional consulting fees associated with Enterprise Resource Planning system implementations. See “Note Regarding Use of Non-GAAP Financial Measures” above. The following tables present the reconciliation of GAAP operating income and GAAP operating margin to non-GAAP operating income and non-GAAP operating margin, and GAAP net income to non-GAAP net income.

Comparison of the years ended December 31, 2025 and 2024

Consolidated net sales in 2025 were $774.4 million compared with $557.9 million in 2024, an increase of $216.5 million or 38.8%. The increase was primarily driven by the Company’s Engineered Systems segment. Within Engineered Systems, net sales increased across all product families with notable growth in filter separators, coalescers, and combustion and SCR systems. Approximately $129.4 million of net sales is attributable to acquisitions that occurred during the preceding twelve-month period.

Gross profit increased by $73.1 million, or 37.3%, to $269.2 million in 2025 compared with $196.1 million in 2024. The increase in gross profit was attributable to the volume growth described above. Gross profit as a percentage of sales decreased to 34.8% in 2025 compared with 35.1% in 2024. The decrease in gross profit as a percentage of sales was driven by subcontractor and materials cost, partially offset by the Company's ability to leverage volume expansion to reduce internal labor and overhead costs in relation to sales.

Selling and administrative expenses were $200.7 million in 2025 compared with $146.7 million in 2024, an increase of $54.0 million, or 36.8%. The increase is primarily attributed to higher headcount to support the Company’s growth and strategic initiatives. The increase in cost was primarily realized through salaries and wages, benefits, stock compensation, incentive payments, and commissions. Approximately 49% of the increase relates to incremental selling and administrative expense incurred at the businesses acquired in 2024 and 2025.

Amortization expenses were $16.1 million in 2025 and $8.7 million in 2024, an increase of $7.4 million, or 85.1%. The increase in expense is attributable to an increase in definite lived asset amortization due to recent acquisitions.

Acquisitions and integration expenses related to various merger and acquisition diligence activities, which include legal, accounting and banking expenses, were $9.5 million in 2025, as compared with $4.2 million in 2024, an increase of $5.3 million, or 126.2%. The increase is due to the timing and volume of acquisition activity. See Note 14 to the Consolidated Financial Statements for further discussion on recent acquisitions.

Other operating expense for the year ended December 31, 2025 was $0.6 million in 2025, a decrease of $0.4 million, or 40%, compared with $1.0 million in 2024. The change was driven by $2.1 million related to the transfer of the pension plan as part of the sale of the Global Pump Solutions business, an increase in executive transition expenses of $1.3 million and an increase in asbestos-related litigation expenses of $1.1 million, related to expected future settlement payments, offset by $(6.6) million related to the fair value adjustment to the WK Group earnout in 2025. Executive transition expenses in 2025 related to severance, executive search fees, and other costs associated with executive officer transitions.

Operating income for 2025 was $105.9 million, an increase of $70.4 million from $35.5 million in 2024. Operating income as a percentage of sales for 2025 was 13.7% compared with 6.3% for 2024. The increase was primarily attributable to higher gross profit, partially offset by higher selling and administrative expenses and acquisition and integration expenses, as well as the gain on the sale of the Company’s GPS business.

Non-GAAP operating income was $68.4 million in 2025, an increase of $19.1 million from $49.4 million in 2024. The increase in non-GAAP operating income is primarily attributable to the increase in gross profit, partially offset by higher selling and administrative costs. Non-GAAP operating income as a percentage of sales was 8.8% for 2025 compared with 8.8% for 2024.

Other income for 2025 was $2.1 million compared to other expense of $4.7 million in 2024, a decrease of $2.6 million. The decrease in other income (expense) was primarily attributable to net foreign currency transaction losses in the current year based on changes in exchange rates at our foreign subsidiaries.

Interest expense was $20.9 million in 2025 compared to $13.0 million in 2024, an increase of $7.9 million, or 60.8%. The increase in interest expense is primarily due to a higher average outstanding debt balance throughout 2025.

Income tax expense was $29.7 million in 2025 compared to $3.3 million in 2024, an increase of $26.4 million, or 800.0%. The effective tax rate for 2025 was 35.9% compared with 18.5% in 2024. Income tax expense and the effective tax rate for 2025 were affected by the sale of the Global Pump Solutions business, changes in valuation allowances, and the net impact of global intangible low-taxed income and foreign-derived intangible income, as well as certain permanent differences including state income taxes, non-deductible incentive stock-based compensation, and differences in tax rates among the jurisdictions in which we operate.

Orders booked were $1,064.3 million in 2025 compared with $667.3 million in 2024, an increase of $397.0 million, or 59.5%. Of this $397.0 million increase, $267.2 million represents organic growth, as defined as the change in orders excluding the impact of orders recorded in the twelve month period subsequent to acquisition dates and orders from the GPS business, while $129.8 million of orders were attributable to acquisitions that occurred during the preceding twelve-month period. The Engineered Systems segment drove the majority of the year-over-year growth as nearly all product families realized higher bookings than in the prior period. Higher bookings in emissions management and thermal acoustics were driven by market demand to support the ongoing energy super-cycle in the United States. The company’s largest booking occurred in the fourth quarter of 2025, which exceeded $135 million; this order is for a comprehensive emissions management solution to support a large-scale Texas-based natural gas power generation facility. Additionally, filtration and water treatment packages bookings were higher year-over-year, notably in international markets.

Comparison of the years ended December 31, 2024 and 2023

See the Management Discussion and Analysis section of our Annual Report on Form 10-K for the year ended December 31, 2024 for a discussion of our consolidated results of operations for the year ended December 31, 2024 compared to the year ended December 31, 2023, which information is incorporated by reference herein.

Business Segments

The Company’s operations are organized and reviewed by management along its product lines and end markets that the segment serves and are presented in two reportable segments. The results of the segments are reviewed through segment profit, which represents income from operations as adjusted for certain items.

Net sales by segment for the years ended December 31 were as follows:

Segment profit by segment for the years ended December 31 were as follows:

Comparison of the years ended December 31, 2025 and 2024

Engineered Systems segment

Our Engineered Systems segment net sales increased $160.3 million to $544.3 million in 2025 compared with $384.0 million in 2024, an increase of 41.7%. The increase in net sales year-over-year was seen in all product families with notable growth in filter separators, coalescers, and combustion and SCR systems. Approximately $62.7 million of net sales in 2025 is attributable to acquisitions that occurred during the preceding twelve-month period.

Segment profit for the Engineered Systems segment increased $32.7 million to $111.8 million in 2025 compared with $79.1 million in 2024, an increase of 41.3%. The increase in operating income is primarily attributable to higher gross profit margin, driven by sales volume as described above.

Our Engineered Systems segment orders booked increased $315.2 million, or 62.9%, to $816.1 million in 2025 compared with $500.9 million in 2024. Higher orders in emissions management and thermal acoustics were driven by market demand to support the ongoing energy super-cycle in the United States. The company’s largest order occurred in the fourth quarter of 2025, which exceeded $135 million; this order is for a comprehensive emissions management solution to support a large-scale Texas-based natural gas power generation facility. Additionally, filtration and water treatment packages orders were higher year-over-year, notably in international

markets. Orders for the company’s products in oil markets experienced year-over-year contraction. Approximately $61.6 million of orders in 2025 are attributable to acquisitions that occurred during the preceding twelve-month period. These orders are attributable to the company’s combustion management product line.

Industrial Process Solutions segment

Our Industrial Process Solutions segment net sales increased $56.2 million to $230.1 million in 2025 compared with $173.9 million in 2024, an increase of 32.3%. The increase is primarily attributable to the Company’s acquisitions of Verantis and WK and the divestiture of its Fluid Handling business. Approximately $66.6 million of net sales in 2025 is attributable to acquisitions that have occurred during the preceding twelve-month period.

Segment profit for the Industrial Process segment increased $68.8 million to $101.1 million in 2025 compared with $32.3 million in 2024. The increase in operating income was primarily attributable to higher sales volume. Gross profit margins decreased year over year, driven by the divestiture of the higher-margin Fluid Handling business and project mix, primarily within the Company’s ducting business. Margin performance reflects these portfolio changes and project mix impacts.

Our Industrial Process Solutions segment orders booked increased $81.9 million, or 49.2%, to $248.2 million in 2025 compared with $166.3 million in 2024. The increase was primarily attributable to the Company’s acquisitions of Verantis and WK, which occurred in late 2024, partially offset by the divestiture of the Fluid Handling business. In addition, the Industrial Process Solutions segment experienced higher bookings related to regenerative thermal oxidizers and scrubber technologies. Approximately $42.9 million of orders in 2025 are attributable to acquisitions that occurred during the preceding twelve month period, offset by the impact of the divestiture of its Fluid Handling business.

Comparison of the years ended December 31, 2024 and 2023

See the Management Discussion and Analysis section of our Annual Report on Form 10-K for the year ended December 31, 2024 for a discussion of business segment results of operations for the year ended December 31, 2024 compared to the year ended December 31, 2023, which information is incorporated by reference herein.

Liquidity and Capital Resources

When we undertake large jobs, our working capital objective is to make these projects self-funding. We work to achieve this by obtaining initial down payments, progress billing contracts, when possible, utilizing extended payment terms from material suppliers, and paying sub-contractors after payment from our customers, which is an industry practice. Our investment in net working capital is funded by cash flow from operations and by our revolving line of credit.

At December 31, 2025, the Company had working capital of $104.4 million, compared with $86.3 million at December 31, 2024. The ratio of current assets to current liabilities was 1.34 to 1.00 at December 31, 2025 as compared with a ratio of 1.35 to 1.00 at December 31, 2024.

At December 31, 2025 and 2024, cash and cash equivalents totaled $33.1 million and $37.8 million, respectively. As of December 31, 2025 and 2024, $26.4 million and $29.7 million, respectively, of our cash and cash equivalents were held by foreign subsidiaries, as well as being denominated in foreign currencies.

Debt consisted of the following: