ADTRAN Holdings, Inc.

Symbol: ADTN on Nasdaq
Entity: Company
Industry: Telephone & Telegraph Apparatus (Office Of Manufacturing)
Business address: 901 Explorer Blvd, 35806 Huntsville, AL
Phone: 256-963-8220
Fiscal year end: December 31
Category: Accelerated filer
Former names: ADTRAN INC (to 7/11/2022)
All SEC filings: View on sec.gov

Get insider transactions for this issuer

ADTRAN Holdings, Inc. has filed 2,025 SEC EDGAR filings since 2/7/1996

Latest Filings

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
SD	Open Document	Open Filing	SD	May 29, 2025		001-41446
8-K	Open Document \| Data	Open Filing	8-K	May 28, 2025	May 27, 2025	001-41446
DEFA14A	Open Document	Open Filing	DEFA14A	May 27, 2025		001-41446
8-K	Open Document \| Data	Open Filing	8-K	May 27, 2025	May 27, 2025	001-41446
10-Q	Open Document \| Data	Open Filing	10-Q	May 20, 2025	Mar 31, 2025	001-41446
10-K/A	Open Document \| Data	Open Filing	10-K/A	May 20, 2025	Dec 31, 2024	001-41446
SCHEDULE 13G/A	Open Document	Open Filing		May 15, 2025		005-44919
DEFA14A	Open Document \| Data	Open Filing	DEFA14A	May 13, 2025		001-41446
NT 10-Q	Open Document	Open Filing	NT 10-Q	May 13, 2025	May 13, 2025	001-41446
8-K	Open Document \| Data	Open Filing	8-K	May 13, 2025	May 13, 2025	001-41446
8-K	Open Document \| Data	Open Filing	8-K	May 12, 2025	May 6, 2025	001-41446
SCHEDULE 13G/A	Open Document	Open Filing		May 9, 2025		005-44919
8-K	Open Document \| Data	Open Filing	8-K	May 8, 2025	May 7, 2025	001-41446
SCHEDULE 13G/A	Open Document	Open Filing		Apr 23, 2025		005-44919
8-K	Open Document \| Data	Open Filing	8-K	Apr 16, 2025	Apr 15, 2025	001-41446
4	Open Document	Open Filing	4	Apr 15, 2025	Apr 13, 2025
ARS	Open Document	Open Filing	ARS	Mar 31, 2025	Dec 31, 2024	001-41446
DEFA14A	Open Document \| Data	Open Filing	DEFA14A	Mar 31, 2025		001-41446
DEF 14A	Open Document \| Data	Open Filing	DEF 14A	Mar 31, 2025	Mar 31, 2025	001-41446
4	Open Document	Open Filing	4	Mar 20, 2025	Mar 19, 2025
3	Open Document	Open Filing	3	Mar 20, 2025	Mar 10, 2025
8-K	Open Document \| Data	Open Filing	8-K	Mar 7, 2025	Mar 6, 2025	001-41446
SCHEDULE 13G	Open Document	Open Filing		Mar 6, 2025		005-44919
10-K	Open Document \| Data	Open Filing	10-K	Mar 3, 2025	Dec 31, 2024	001-41446
8-K	Open Document \| Data	Open Filing	8-K	Feb 27, 2025	Feb 26, 2025	001-41446
SCHEDULE 13G/A	Open Document	Open Filing		Feb 14, 2025		005-44919
4	Open Document	Open Filing	4	Jan 28, 2025	Jan 24, 2025
4	Open Document	Open Filing	4	Jan 28, 2025	Jan 24, 2025
4	Open Document	Open Filing	4	Jan 28, 2025	Jan 24, 2025
4	Open Document	Open Filing	4	Jan 28, 2025	Jan 24, 2025
4	Open Document	Open Filing	4	Jan 22, 2025	Jan 20, 2025
4	Open Document	Open Filing	4	Jan 22, 2025	Jan 20, 2025
4	Open Document	Open Filing	4	Jan 15, 2025	Jan 13, 2025
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
4	Open Document	Open Filing	4	Jan 3, 2025	Dec 31, 2024
EFFECT	Open Document	Open Filing		Nov 26, 2024		333-283311
CORRESP	Open Document	Open Filing		Nov 22, 2024
UPLOAD	Open Document	Open Filing		Nov 21, 2024		333-283311
4	Open Document	Open Filing	4	Nov 19, 2024	Nov 16, 2024
4	Open Document	Open Filing	4	Nov 19, 2024	Nov 16, 2024
S-3	Open Document \| Data	Open Filing	S-3	Nov 18, 2024		333-283311
SCHEDULE 13G/A	Open Document	Open Filing		Nov 14, 2024		005-44919
SC 13G/A	Open Document	Open Filing	SC 13G/A	Nov 14, 2024		005-44919
10-Q	Open Document \| Data	Open Filing	10-Q	Nov 12, 2024	Sep 30, 2024	001-41446
SC 13G/A	Open Document	Open Filing		Nov 12, 2024		005-44919
SC 13G	Open Document	Open Filing	SCHEDULE 13G	Nov 12, 2024		005-44919

Previous1 2 3 4 5…20Next

Showing 1 to 50 of 1,000 entries