BIOGEN INC. — All Filings
1,000 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | PRIMARY DOCUMENT | 0001127602-25-017766 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017759 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017760 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017761 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017762 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017765 | Jun 18, 2025 | Jun 17, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-017763 | Jun 18, 2025 | Jun 17, 2025 |
| DEFA14A | DEFA14A | 0001193125-25-132885 | Jun 2, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001127602-25-015011 | May 20, 2025 | May 19, 2025 |
| 144 | — | 0001959173-25-003316 | May 19, 2025 | — |
| 8-K | 8-K | 0001193125-25-117854 | May 12, 2025 | May 6, 2025 |
| 424B2 | 424B2 | 0001193125-25-115583 | May 8, 2025 | — |
| FWP | FWP | 0001193125-25-113926 | May 6, 2025 | — |
| 424B2 | 424B2 | 0001193125-25-113470 | May 6, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001127602-25-013345 | May 5, 2025 | May 2, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-013346 | May 5, 2025 | May 1, 2025 |
| S-3ASR | S-3ASR | 0001193125-25-110133 | May 1, 2025 | — |
| 8-K | 8-K | 0000875045-25-000014 | May 1, 2025 | — |
| 10-Q | 10-Q | 0000875045-25-000018 | May 1, 2025 | Mar 31, 2025 |
| ARS | ARS | 0001193125-25-097750 | Apr 28, 2025 | Dec 31, 2024 |
| DEF 14A | DEF 14A | 0001193125-25-097747 | Apr 28, 2025 | Jun 17, 2025 |
| DEFA14A | DEFA14A | 0001193125-25-097749 | Apr 28, 2025 | — |
| SCHEDULE 13G/A | — | 0001576419-25-000568 | Apr 17, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001127602-25-011365 | Apr 3, 2025 | Apr 1, 2025 |
| 3 | PRIMARY DOCUMENT | 0001127602-25-008859 | Mar 10, 2025 | Mar 1, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-008861 | Mar 10, 2025 | Mar 7, 2025 |
| 144 | — | 0001950047-25-001660 | Mar 7, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004462 | Feb 12, 2025 | Feb 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004456 | Feb 12, 2025 | Feb 10, 2025 |
| 8-K | 8-K | 0000875045-25-000004 | Feb 12, 2025 | — |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004457 | Feb 12, 2025 | Feb 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004452 | Feb 12, 2025 | Feb 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004454 | Feb 12, 2025 | Feb 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004461 | Feb 12, 2025 | Feb 10, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004459 | Feb 12, 2025 | Feb 10, 2025 |
| 10-K | 10-K | 0000875045-25-000009 | Feb 12, 2025 | Dec 31, 2024 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-004243 | Feb 11, 2025 | Feb 7, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003964 | Feb 10, 2025 | Feb 7, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003954 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003955 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003956 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003957 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003958 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003959 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003960 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003961 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-003962 | Feb 10, 2025 | Feb 6, 2025 |
| 4 | PRIMARY DOCUMENT | 0001127602-25-002817 | Feb 3, 2025 | Jan 31, 2025 |
| 8-K | 8-K | 0001193125-25-006578 | Jan 15, 2025 | Jan 13, 2025 |
| SCHEDULE 13D | — | 0000950170-25-004311 | Jan 10, 2025 | — |