ADTRAN Holdings, Inc. — DEF 14A Filings
30 DEF 14A filings on record
This page lists all DEF 14A filings submitted to the SEC by ADTRAN Holdings, Inc. (ADTN), sorted by most recent first. Each row links to the full filing on EdgarLookup. ADTRAN Holdings, Inc. has filed 30 DEF 14A documents with the SEC since 2017. To view all SEC filings by ADTRAN Holdings, Inc., see the full filings list.
All
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
11-K/A
144
15-12G
25-NSE
3
3/A
4
4/A
425
5
8-K
8-K/A
8-K12B
ARS
ARS/A
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFM14A
DEFR14A
EFFECT
NT 10-K
NT 10-Q
PRE 14A
S-3
S-3ASR
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-I
SC TO-I/A
SCHEDULE 13G
SCHEDULE 13G/A
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| DEF 14A | DEF 14A | 0001193125-26-127315 | Mar 27, 2026 | — |
| DEF 14A | DEF 14A | 0000950170-25-047713 | Mar 31, 2025 | — |
| DEF 14A | DEF 14A | 0001193125-24-078306 | Mar 27, 2024 | May 8, 2024 |
| DEF 14A | DEF 14A | 0001193125-23-081606 | Mar 28, 2023 | — |
| DEF 14A | DEF 14A | 0001193125-22-087450 | Mar 29, 2022 | May 11, 2022 |
| DEF 14A | DEF 14A | 0001193125-21-099293 | Mar 30, 2021 | May 12, 2021 |
| DEF 14A | DEF 14A | 0001193125-20-095417 | Apr 2, 2020 | May 13, 2020 |
| DEF 14A | DEF 14A | 0001193125-19-096306 | Apr 3, 2019 | May 8, 2019 |
| DEF 14A | DEF 14A | 0001193125-18-107370 | Apr 4, 2018 | May 9, 2018 |
| DEF 14A | DEF 14A | 0001193125-17-108241 | Apr 3, 2017 | May 10, 2017 |
| DEF 14A | DEF 14A | 0001193125-16-528914 | Apr 4, 2016 | May 11, 2016 |
| DEF 14A | DEF 14A | 0001193125-15-118775 | Apr 3, 2015 | May 13, 2015 |
| DEF 14A | DEF 14A | 0001193125-14-131056 | Apr 4, 2014 | May 14, 2014 |
| DEF 14A | DEF 14A | 0001193125-13-136388 | Apr 1, 2013 | May 8, 2013 |
| DEF 14A | DEF 14A | 0001193125-12-142401 | Mar 30, 2012 | May 9, 2012 |
| DEF 14A | DEF 14A | 0000950123-11-031224 | Mar 31, 2011 | May 4, 2011 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000950123-10-031982 | Apr 5, 2010 | May 5, 2010 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-09-061035 | Mar 23, 2009 | May 6, 2009 |
| DEF 14A | DEFINITIVE PROXY MATERIAL | 0001193125-08-074027 | Apr 3, 2008 | May 6, 2008 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-07-069687 | Mar 30, 2007 | May 8, 2007 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-06-070277 | Mar 31, 2006 | May 9, 2006 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-05-070038 | Apr 5, 2005 | May 18, 2005 |
| DEF 14A | PROXY STATEMENT | 0001193125-04-039375 | Mar 12, 2004 | — |
| DEF 14A | NOTICE AND PROXY | 0000931763-03-000491 | Mar 10, 2003 | Apr 10, 2003 |
| DEF 14A | NOTICE & PROXY STATEMENT | 0000931763-02-000603 | Mar 11, 2002 | Apr 16, 2002 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000931763-01-000368 | Mar 6, 2001 | Apr 20, 2001 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000931763-00-000473 | Mar 8, 2000 | Apr 21, 2000 |
| DEF 14A | ADTRAN, INC. | 0000931763-99-000702 | Mar 11, 1999 | Apr 20, 1999 |
| DEF 14A | DEFINITIVE PROXY FILING | 0000931763-98-000656 | Mar 19, 1998 | Apr 27, 1998 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000931763-97-000363 | Mar 25, 1997 | Apr 23, 1997 |