ADTRAN Holdings, Inc. — All Filings
1,001 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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 | 8-K | 0000950170-25-077995 | May 28, 2025 | May 27, 2025 |
| 8-K | 8-K | 0001193125-25-127878 | May 27, 2025 | — |
| DEFA14A | DEFA14A | 0001193125-25-127881 | May 27, 2025 | — |
| 10-Q | 10-Q | 0000950170-25-075374 | May 20, 2025 | Mar 31, 2025 |
| 10-K/A | 10-K/A | 0000950170-25-075366 | May 20, 2025 | Dec 31, 2024 |
| SCHEDULE 13G/A | — | 0001645721-25-000010 | May 15, 2025 | — |
| 8-K | 8-K | 0000950170-25-070473 | May 13, 2025 | — |
| DEFA14A | DEFA14A | 0000950170-25-070514 | May 13, 2025 | — |
| NT 10-Q | NT 10-Q | 0000950170-25-070493 | May 13, 2025 | — |
| 8-K | 8-K | 0000950170-25-069478 | May 12, 2025 | May 6, 2025 |
| SCHEDULE 13G/A | — | 0001644956-25-000028 | May 9, 2025 | — |
| 8-K | 8-K | 0000950170-25-066343 | May 8, 2025 | May 7, 2025 |
| SCHEDULE 13G/A | — | 0000912282-25-000466 | Apr 23, 2025 | — |
| 8-K | 8-K | 0001193125-25-081800 | Apr 16, 2025 | Apr 15, 2025 |
| 4 | 4 | 0000950170-25-054336 | Apr 15, 2025 | Apr 13, 2025 |
| ARS | ARS | 0000950170-25-047726 | Mar 31, 2025 | Dec 31, 2024 |
| DEFA14A | DEFA14A | 0000950170-25-047718 | Mar 31, 2025 | — |
| DEF 14A | DEF 14A | 0000950170-25-047713 | Mar 31, 2025 | — |
| 3 | 3 | 0000950170-25-042619 | Mar 20, 2025 | Mar 10, 2025 |
| 4 | 4 | 0000950170-25-042657 | Mar 20, 2025 | Mar 19, 2025 |
| 8-K | 8-K | 0001193125-25-048727 | Mar 7, 2025 | Mar 6, 2025 |
| SCHEDULE 13G | — | 0001731122-25-000343 | Mar 6, 2025 | — |
| 10-K | 10-K | 0000950170-25-031056 | Mar 3, 2025 | Dec 31, 2024 |
| 8-K | 8-K | 0000950170-25-028352 | Feb 27, 2025 | Feb 26, 2025 |
| SCHEDULE 13G/A | — | 0001645721-25-000003 | Feb 14, 2025 | — |
| 4 | 4 | 0000950170-25-009894 | Jan 28, 2025 | Jan 24, 2025 |
| 4 | 4 | 0000950170-25-009862 | Jan 28, 2025 | Jan 24, 2025 |
| 4 | 4 | 0000950170-25-009870 | Jan 28, 2025 | Jan 24, 2025 |
| 4 | 4 | 0000950170-25-009872 | Jan 28, 2025 | Jan 24, 2025 |
| 4 | 4 | 0000950170-25-007833 | Jan 22, 2025 | Jan 20, 2025 |
| 4 | 4 | 0000950170-25-007831 | Jan 22, 2025 | Jan 20, 2025 |
| 4 | 4 | 0000950170-25-005822 | Jan 15, 2025 | Jan 13, 2025 |
| 4 | 4 | 0000950170-25-001096 | Jan 3, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-001102 | Jan 3, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-001098 | Jan 3, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-001097 | Jan 3, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-001100 | Jan 3, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-001099 | Jan 3, 2025 | Dec 31, 2024 |
| EFFECT | — | 9999999995-24-003593 | Nov 26, 2024 | — |
| CORRESP | — | 0001193125-24-264351 | Nov 22, 2024 | — |
| UPLOAD | — | 0000000000-24-012928 | Nov 21, 2024 | — |
| 4 | 4 | 0000950170-24-128540 | Nov 19, 2024 | Nov 16, 2024 |
| 4 | 4 | 0000950170-24-128542 | Nov 19, 2024 | Nov 16, 2024 |
| S-3 | S-3 | 0001193125-24-261010 | Nov 18, 2024 | — |
| SC 13G/A | SC 13G/A | 0001104659-24-118541 | Nov 14, 2024 | — |
| SCHEDULE 13G/A | — | 0001645721-24-000020 | Nov 14, 2024 | — |
| SC 13G/A | — | 0000932471-24-000834 | Nov 12, 2024 | — |
| SC 13G | SCHEDULE 13G | 0000912282-24-000772 | Nov 12, 2024 | — |
| 10-Q | 10-Q | 0000950170-24-125685 | Nov 12, 2024 | Sep 30, 2024 |
| 8-K | 8-K | 0000950170-24-122762 | Nov 7, 2024 | Nov 6, 2024 |