BIIB SEC Filings
SEC filings for BIIB. Annual and quarterly reports, 8-K events,
Form 4 insider filings and 13D/G stake disclosures.
| Form | Filed | Accession |
|---|---|---|
| SC 13G/AamendedFMR LLC | Aug 6, 2026 | 0000315066-26-001959EDGAR |
| SC 13G/AamendedAbigail P. Johnson | Aug 6, 2026 | 0000315066-26-001959EDGAR |
| SC 13G/AamendedFMR LLC | Jun 5, 2026 | 0000315066-26-001417EDGAR |
| SC 13G/AamendedAbigail P. Johnson | Jun 5, 2026 | 0000315066-26-001417EDGAR |
| SC 13D/AamendedBIOGEN INC. | May 14, 2026 | 0000950157-26-000611EDGAR |
| SC 13G/AamendedFMR LLC | May 6, 2026 | 0000315066-26-001103EDGAR |
| SC 13G/AamendedAbigail P. Johnson | May 6, 2026 | 0000315066-26-001103EDGAR |
| SC 13GVanguard Capital Management | Apr 29, 2026 | 0002100119-26-000210EDGAR |
| SC 13DBIOGEN INC. | Apr 6, 2026 | 0000950157-26-000478EDGAR |
| SC 13G/AamendedVANGUARD GROUP INC | Mar 26, 2026 | 0000102909-26-000745EDGAR |
| SC 13GFMR LLC | Feb 5, 2026 | 0000315066-26-000383EDGAR |
| SC 13GAbigail P. Johnson | Feb 5, 2026 | 0000315066-26-000383EDGAR |
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Source: SEC EDGAR.