ADTRAN Holdings, Inc.

Nasdaq:ADTN

Telephone & Telegraph Apparatus·HUNTSVILLE, AL

Adtran, Inc. is an American fiber networking and telecommunications company headquartered in Huntsville, Alabama.

Financials

20 shown

Type	Period	Ended	Filed
10-K	FY 2025	12/31/25	2/26/26	→
10-Q	Q3 2025	9/30/25	11/4/25	→
10-Q	Q2 2025	6/30/25	8/5/25	→
10-Q	Q1 2025	3/31/25	5/20/25	→
10-K/A	FY 2024	12/31/24	5/20/25	→
10-K	FY 2024	12/31/24	3/3/25	→
↓

Earnings Releases (8-K)

32 shown

Filed	Period
2/26/26	Q1 FY2026	→
1/22/26	Q4 FY2026	→
11/4/25	Q4 FY2025	→
8/5/25	Q3 FY2025	→
7/17/25	Q2 FY2025	→
7/16/25	Q2 FY2025	→
↓

News (8-K)

48 shown

Filed	Type	Description
12/11/25	Exec Change	Departure or Appointment of Directors or Certain Officers	→
9/22/25	Agreement	Entry into a Material Definitive Agreement	→
9/17/25	Agreement	Entry into a Material Definitive Agreement	→
7/30/25	Vote	Submission of Matters to a Vote of Security Holders	→
5/27/25	Other	Other Events	→
5/13/25	Restatement	Non-Reliance on Previously Issued Financial Statements	→
↓

Prospectuses & Registrations

25 shown

Filed	Form	Description
6/6/25	ARS/A	ARS/A	→
3/31/25	ARS	ARS	→
11/18/24	S-3	S-3	→
5/10/24	S-8	S-8	→
5/10/24	S-8	S-8	→
3/27/24	ARS	ARS	→
↓

Filing History(1001 filings)

TypeDateAccessionPeriodSize

Mar 5, 2026

0001193125-26-0939544

Mar 4, 2026

5.6 KB

4/A

Mar 5, 2026

0001193125-26-0939354/A

Jan 24, 2025

5.3 KB

144

Mar 4, 2026

0001950047-26-002159

—

4.7 KB

10-K

Feb 26, 2026

0001193125-26-07387810-K

Dec 31, 2025

27.2 MB

8-K

Feb 26, 2026

0001193125-26-0733618-K

Feb 25, 2026

15.6 MB

4/A

Jan 30, 2026

0001193125-26-0317454/A

Jan 26, 2026

5.1 KB

Jan 28, 2026

0001193125-26-0274174

Jan 26, 2026

6.8 KB

Jan 28, 2026

0001193125-26-0274114

Jan 26, 2026

6.1 KB

Jan 27, 2026

0001193125-26-0248274

Jan 24, 2026

6.6 KB

Jan 27, 2026

0001193125-26-0248184

Jan 24, 2026

5.9 KB

Jan 22, 2026

0001193125-26-0194644

Jan 20, 2026

5.2 KB

Jan 22, 2026

0001193125-26-0194554

Jan 20, 2026

4.5 KB

8-K

Jan 22, 2026

0001193125-26-0183678-K

Jan 21, 2026

297.4 KB

Jan 5, 2026

0001193125-26-0029034

Dec 31, 2025

4.5 KB

Jan 5, 2026

0001193125-26-0029024

Dec 31, 2025

4.5 KB

Jan 5, 2026

0001193125-26-0029014

Dec 31, 2025

4.4 KB

Jan 5, 2026

0001193125-26-0029004

Dec 31, 2025

4.4 KB

Jan 5, 2026

0001193125-26-0028984

Dec 31, 2025

4.4 KB

Jan 5, 2026

0001193125-26-0028974

Dec 31, 2025

5.2 KB

8-K

Dec 11, 2025

0001193125-25-3159108-K

Dec 9, 2025

257.8 KB

Dec 1, 2025

0001193125-25-3034924

Nov 28, 2025

4.3 KB

Dec 1, 2025

0001193125-25-3034914

Nov 26, 2025

4.9 KB

Nov 25, 2025

0001193125-25-2957094

Nov 24, 2025

4.9 KB

Nov 19, 2025

0001193125-25-2880744

Nov 17, 2025

5.2 KB

Nov 19, 2025

0001193125-25-2880734

Nov 17, 2025

4.5 KB

25 filings shown

Filed	Form	Description
3/4/26	144	144	→
11/14/25	SCHEDULE 13G/A	SCHEDULE 13G/A	→
8/14/25	SCHEDULE 13G/A	SCHEDULE 13G/A	→
7/7/25	SCHEDULE 13G/A	SCHEDULE 13G/A	→
6/30/25	11-K	11-K	→
5/29/25	SD	SD	→
↓

ADTRAN Holdings, Inc.

Financials

Earnings Releases (8-K)

News (8-K)

Prospectuses & Registrations

Filing History(1001 filings)

Proxies

Ownership

Other Filings

Filed	Form	Description
6/6/25	DEFA14A	DEFA14A	→
6/6/25	DEFR14A	DEFR14A	→
5/27/25	DEFA14A	DEFA14A	→
5/13/25	DEFA14A	DEFA14A	→
3/31/25	DEFA14A	DEFA14A	→
3/31/25	DEF 14A	DEF 14A	→
↓

Filed	Form	Description
3/5/26	4	4	→
3/5/26	4/A	4/A	→
1/30/26	4/A	4/A	→
1/28/26	4	4	→
1/28/26	4	4	→
1/27/26	4	4	→
↓