ADTRAN Holdings, Inc. - ADTN
All tracked SEC files for this issuer. Showing up to 200 latest records.
Need parsed ownership details (13D/13G with shares/percent)?
Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).
Files summary
Total files loaded: 17
Latest filed: Aug 10, 2026
| Form | Count |
|---|---|
| 8-K | 8 |
| 4 | 6 |
| 144 | 2 |
| SCHEDULE 13G | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| Aug 10, 2026 | 4 | Aug 10, 2026 | 0001193125-26-342317 | View |
| Aug 10, 2026 | 8-K | Aug 10, 2026 | 0001193125-26-342359 | View |
| Aug 07, 2026 | 4 | Aug 06, 2026 | 0001193125-26-340206 | View |
| Aug 04, 2026 | 8-K | Aug 03, 2026 | 0001193125-26-331458 | View |
| Jul 28, 2026 | 4 | Jul 24, 2026 | 0001193125-26-320947 | View |
| Jul 23, 2026 | 8-K | Jul 21, 2026 | 0001193125-26-314198 | View |
| Jul 22, 2026 | 8-K | Jul 21, 2026 | 0001193125-26-311290 | View |
| Jul 06, 2026 | 4 | Jul 01, 2026 | 0001193125-26-296161 | View |
| Jun 26, 2026 | 8-K | Jun 23, 2026 | 0001193125-26-283882 | View |
| May 22, 2026 | 4 | May 20, 2026 | 0001193125-26-236824 | View |
| May 20, 2026 | 144 | — | 0001950047-26-004824 | View |
| May 18, 2026 | 8-K | May 13, 2026 | 0001193125-26-228208 | View |
| May 11, 2026 | 4 | May 07, 2026 | 0001193125-26-216692 | View |
| May 07, 2026 | 144 | — | 0001950047-26-004202 | View |
| May 05, 2026 | 8-K | May 04, 2026 | 0001193125-26-204995 | View |
| Apr 28, 2026 | SCHEDULE 13G | — | 0002100121-26-000079 | View |
| Apr 07, 2026 | 8-K | Apr 01, 2026 | 0001193125-26-145496 | View |