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 and 1 other reporting person | Aug 6, 2026 | 0000315066-26-001959EDGAR |
| SC 13G/AamendedFMR LLC and 1 other reporting person | Jun 5, 2026 | 0000315066-26-001417EDGAR |
| SC 13G/AamendedAbigail P. Johnson and 1 other reporting person | May 6, 2026 | 0000315066-26-001103EDGAR |
| SC 13GVanguard Capital Management | Apr 29, 2026 | 0002100119-26-000210EDGAR |
| SC 13G/AamendedThe Vanguard Group | Mar 26, 2026 | 0000102909-26-000745EDGAR |
| SC 13GAbigail P. Johnson and 1 other reporting person | Feb 5, 2026 | 0000315066-26-000383EDGAR |
| SC 13G/AamendedPRIMECAP MANAGEMENT CO/CA/ | Nov 14, 2025 | 0000763212-25-000007EDGAR |
| SC 13GSTATE STREET CORPORATION | Nov 10, 2025 | 0000093751-25-000581EDGAR |
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Source: SEC EDGAR.