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: 38
Latest filed: Apr 06, 2026
| Form | Count |
|---|---|
| 4 | 25 |
| 8-K | 8 |
| SCHEDULE 13G/A | 2 |
| 144 | 2 |
| SCHEDULE 13G | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| 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 |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000026 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000027 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000028 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000029 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000030 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000031 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000032 | View |
| Feb 17, 2026 | 4 | Feb 12, 2026 | 0000875045-26-000033 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000034 | View |
| Feb 17, 2026 | 4 | Feb 13, 2026 | 0000875045-26-000035 | View |
| Feb 11, 2026 | 8-K | Feb 11, 2026 | 0001193125-26-046803 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000015 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000016 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000017 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000018 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000019 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000020 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000021 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000022 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000023 | View |
| Feb 10, 2026 | 4 | Feb 06, 2026 | 0000875045-26-000024 | View |
| Feb 09, 2026 | 144 | — | 0001959173-26-000739 | View |
| Feb 06, 2026 | 8-K | Feb 06, 2026 | 0000875045-26-000011 | View |
| Feb 05, 2026 | SCHEDULE 13G | — | 0000315066-26-000383 | View |
| Feb 03, 2026 | 4 | Jan 30, 2026 | 0000875045-26-000007 | View |
| Feb 02, 2026 | 144 | — | 0001959173-26-000517 | View |
| Jan 14, 2026 | 8-K | Jan 13, 2026 | 0000875045-26-000003 | View |
| Dec 03, 2025 | 4 | Dec 01, 2025 | 0000875045-25-000052 | View |
| Nov 13, 2025 | SCHEDULE 13G/A | — | 0000763212-25-000007 | View |
| Nov 04, 2025 | 4 | Oct 31, 2025 | 0000875045-25-000051 | View |
| Oct 30, 2025 | 8-K | Oct 30, 2025 | 0000875045-25-000047 | View |
| Oct 14, 2025 | 8-K | Oct 14, 2025 | 0000875045-25-000040 | View |
| Oct 06, 2025 | 4 | Oct 02, 2025 | 0000875045-25-000037 | View |