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 |
|---|---|---|
| 8-K | Jul 29, 2026 | 0000875045-26-000073EDGAR |
| 8-K | Jul 1, 2026 | 0000875045-26-000068EDGAR |
| 8-K/Aamended | Jun 10, 2026 | 0000950157-26-000699EDGAR |
| 8-K | Jun 10, 2026 | 0000950157-26-000700EDGAR |
| 8-K | May 14, 2026 | 0001193125-26-222908EDGAR |
| 8-K | Apr 29, 2026 | 0000875045-26-000042EDGAR |
| 8-K | Apr 6, 2026 | 0000875045-26-000039EDGAR |
| 8-K | Mar 31, 2026 | 0001193125-26-134889EDGAR |
| 8-K | Mar 11, 2026 | 0000950157-26-000280EDGAR |
| 8-K | Feb 11, 2026 | 0001193125-26-046803EDGAR |
| 8-K | Feb 6, 2026 | 0000875045-26-000011EDGAR |
| 8-K | Jan 13, 2026 | 0000875045-26-000003EDGAR |
| 8-K | Oct 30, 2025 | 0000875045-25-000047EDGAR |
| 8-K | Oct 14, 2025 | 0000875045-25-000040EDGAR |
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Source: SEC EDGAR.