ADTRAN Holdings, Inc. (ADTN)
CIK 926282 · operating company. SEC filings, financial statements, 10-K sections, 8-K items and insider trades for ADTRAN Holdings, Inc..
Recent SEC filings
| Filed | Form | Accession number |
|---|---|---|
| Aug 10, 2026 | 4 | 0001193125-26-342317 |
| Aug 10, 2026 | 8-K | 0001193125-26-342359 |
| Aug 7, 2026 | 4 | 0001193125-26-340206 |
| Aug 4, 2026 | 8-K | 0001193125-26-331458 |
| Aug 4, 2026 | 10-Q | 0001193125-26-331632 |
| Jul 28, 2026 | 4 | 0001193125-26-320947 |
| Jul 23, 2026 | 8-K | 0001193125-26-314198 |
| Jul 22, 2026 | 8-K | 0001193125-26-311290 |
| Jul 17, 2026 | S-3ASR | 0001193125-26-307471 |
| Jul 6, 2026 | 4 | 0001193125-26-296161 |
| Jul 1, 2026 | 3 | 0001193125-26-292752 |
| Jun 26, 2026 | 8-K | 0001193125-26-283882 |
| Jun 26, 2026 | 11-K | 0001193125-26-285745 |
| May 22, 2026 | 4 | 0001193125-26-236824 |
| May 20, 2026 | 144 | 0001950047-26-004824 |
| May 18, 2026 | 8-K | 0001193125-26-228208 |
| May 12, 2026 | SD | 0001193125-26-218337 |
| May 11, 2026 | 4 | 0001193125-26-216692 |
| May 7, 2026 | 144 | 0001950047-26-004202 |
| May 5, 2026 | 10-Q | 0001193125-26-205276 |
| May 5, 2026 | 8-K | 0001193125-26-204995 |
| May 1, 2026 | DEFA14A | 0001193125-26-200826 |
| Apr 28, 2026 | SCHEDULE 13G | 0002100121-26-000079 |
| Apr 7, 2026 | 8-K | 0001193125-26-145496 |
| Apr 3, 2026 | 4 | 0001193125-26-142013 |