ADTRAN Holdings, Inc. — SCHEDULE 13G/A Filings
10 SCHEDULE 13G/A filings on record
This page lists all SCHEDULE 13G/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 10 SCHEDULE 13G/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 |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-000526 | Mar 26, 2026 | — |
| SCHEDULE 13G/A | — | 0001731122-26-000445 | Mar 18, 2026 | — |
| SCHEDULE 13G/A | — | 0001645721-25-000021 | Nov 14, 2025 | — |
| SCHEDULE 13G/A | — | 0001645721-25-000017 | Aug 14, 2025 | — |
| SCHEDULE 13G/A | — | 0000932471-25-000696 | Jul 7, 2025 | — |
| SCHEDULE 13G/A | — | 0001645721-25-000010 | May 15, 2025 | — |
| SCHEDULE 13G/A | — | 0001644956-25-000028 | May 9, 2025 | — |
| SCHEDULE 13G/A | — | 0000912282-25-000466 | Apr 23, 2025 | — |
| SCHEDULE 13G/A | — | 0001645721-25-000003 | Feb 14, 2025 | — |
| SCHEDULE 13G/A | — | 0001645721-24-000020 | Nov 14, 2024 | — |