ADTRAN Holdings, Inc. — 8-K/A Filings
8 8-K/A filings on record
This page lists all 8-K/A 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 8 8-K/A 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 |
|---|---|---|---|---|
| 8-K/A | 8-K/A | 0000950170-25-096408 | Jul 17, 2025 | Jul 16, 2025 |
| 8-K/A | FORM 8-K/A | 0001193125-23-212439 | Aug 14, 2023 | Aug 6, 2023 |
| 8-K/A | 8-K/A | 0001193125-23-209024 | Aug 10, 2023 | Aug 6, 2023 |
| 8-K/A | 8-K/A | 0000950170-22-023662 | Nov 9, 2022 | Nov 7, 2022 |
| 8-K/A | 8-K/A | 0001193125-22-268261 | Oct 25, 2022 | Oct 24, 2022 |
| 8-K/A | 8-K/A | 0000950170-22-019126 | Sep 30, 2022 | Jul 15, 2022 |
| 8-K/A | 8-K/A | 0001564590-21-009408 | Feb 26, 2021 | Feb 3, 2021 |
| 8-K/A | ADTRAN, INC. 8-K/A | 0001157523-07-000494 | Jan 23, 2007 | Jan 22, 2007 |