ADTRAN Holdings, Inc. - ADTN
All tracked SEC files for this issuer. Showing up to 200 latest records.
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Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).
Files summary
Total files loaded: 36
Latest filed: May 22, 2026
| Form | Count |
|---|---|
| 4 | 22 |
| 8-K | 6 |
| 144 | 3 |
| SCHEDULE 13G/A | 2 |
| 4/A | 2 |
| SCHEDULE 13G | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| 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 |
| Apr 03, 2026 | 4 | Apr 01, 2026 | 0001193125-26-142009 | View |
| Apr 03, 2026 | 4 | Apr 01, 2026 | 0001193125-26-142013 | View |
| Apr 03, 2026 | 4 | Apr 01, 2026 | 0001193125-26-142016 | View |
| Mar 26, 2026 | SCHEDULE 13G/A | — | 0000102909-26-000526 | View |
| Mar 23, 2026 | 4 | Mar 19, 2026 | 0001193125-26-119867 | View |
| Mar 18, 2026 | SCHEDULE 13G/A | — | 0001731122-26-000445 | View |
| Mar 05, 2026 | 4/A | Jan 24, 2025 | 0001193125-26-093935 | View |
| Mar 05, 2026 | 4 | Mar 04, 2026 | 0001193125-26-093954 | View |
| Mar 04, 2026 | 144 | — | 0001950047-26-002159 | View |
| Feb 26, 2026 | 8-K | Feb 25, 2026 | 0001193125-26-073361 | View |
| Jan 30, 2026 | 4/A | Jan 26, 2026 | 0001193125-26-031745 | View |
| Jan 28, 2026 | 4 | Jan 26, 2026 | 0001193125-26-027411 | View |
| Jan 28, 2026 | 4 | Jan 26, 2026 | 0001193125-26-027417 | View |
| Jan 27, 2026 | 4 | Jan 24, 2026 | 0001193125-26-024818 | View |
| Jan 27, 2026 | 4 | Jan 24, 2026 | 0001193125-26-024827 | View |
| Jan 22, 2026 | 8-K | Jan 21, 2026 | 0001193125-26-018367 | View |
| Jan 22, 2026 | 4 | Jan 20, 2026 | 0001193125-26-019455 | View |
| Jan 22, 2026 | 4 | Jan 20, 2026 | 0001193125-26-019464 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002897 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002898 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002900 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002901 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002902 | View |
| Jan 05, 2026 | 4 | Dec 31, 2025 | 0001193125-26-002903 | View |
| Dec 11, 2025 | 8-K | Dec 09, 2025 | 0001193125-25-315910 | View |
| Dec 01, 2025 | 4 | Nov 26, 2025 | 0001193125-25-303491 | View |
| Dec 01, 2025 | 4 | Nov 28, 2025 | 0001193125-25-303492 | View |
| Nov 25, 2025 | 4 | Nov 24, 2025 | 0001193125-25-295709 | View |