BIOGEN INC. - BIIB
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: 29
Latest filed: Aug 06, 2026
| Form | Count |
|---|---|
| 4 | 12 |
| 8-K | 8 |
| SCHEDULE 13G/A | 4 |
| 144 | 2 |
| 8-K/A | 1 |
| SCHEDULE 13G | 1 |
| SCHEDULE 13D | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| Aug 06, 2026 | SCHEDULE 13G/A | — | 0000315066-26-001959 | View |
| Aug 05, 2026 | 4 | Aug 03, 2026 | 0000875045-26-000076 | View |
| Aug 04, 2026 | 144 | — | 0001959173-26-005582 | View |
| Aug 03, 2026 | 144 | — | 0001959173-26-005518 | View |
| Jul 29, 2026 | 8-K | Jul 29, 2026 | 0000875045-26-000073 | View |
| Jul 01, 2026 | 8-K | Jul 01, 2026 | 0000875045-26-000068 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000059 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000060 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000062 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000063 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000064 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000065 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000052 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000054 | View |
| Jun 11, 2026 | 4 | Jun 09, 2026 | 0000875045-26-000055 | View |
| Jun 10, 2026 | 8-K | Jun 09, 2026 | 0000950157-26-000700 | View |
| Jun 10, 2026 | 8-K/A | May 14, 2026 | 0000950157-26-000699 | View |
| Jun 05, 2026 | SCHEDULE 13G/A | — | 0000315066-26-001417 | View |
| May 14, 2026 | 8-K | May 14, 2026 | 0001193125-26-222908 | View |
| May 06, 2026 | SCHEDULE 13G/A | — | 0000315066-26-001103 | View |
| May 05, 2026 | 4 | May 01, 2026 | 0000875045-26-000046 | View |
| Apr 29, 2026 | SCHEDULE 13G | — | 0002100119-26-000210 | View |
| Apr 29, 2026 | 8-K | Apr 29, 2026 | 0000875045-26-000042 | View |
| Apr 06, 2026 | SCHEDULE 13D | — | 0000950157-26-000478 | View |
| Apr 06, 2026 | 8-K | Apr 06, 2026 | 0000875045-26-000039 | View |
| Apr 03, 2026 | 4 | Apr 01, 2026 | 0000875045-26-000036 | View |
| Mar 31, 2026 | 8-K | Mar 31, 2026 | 0001193125-26-134889 | View |
| Mar 26, 2026 | SCHEDULE 13G/A | — | 0000102909-26-000745 | View |
| Mar 11, 2026 | 8-K | Mar 11, 2026 | 0000950157-26-000280 | View |