Biogen Inc.
BIIBNasdaqCIK 875045HealthcareFiscal year ends Dec 31
Reports and events: 295 filings
Newest first, by EDGAR acceptance time (Eastern). Each filing’s page lists its documents on sec.gov and, for 10-K and 10-Q reports, the extracted sections.
What the forms are: 10-K, 10-Q, 8-K, Form 4, DEF 14A, Schedule 13D, Schedule 13G, amendments, accession numbers.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-2806:23 ET | 10-Q | Quarterly reportPeriod 2026-09-30 | 0000875045-26-000096 |
| 2026-10-2806:07 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-26-000094 |
| 2026-07-2906:36 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0000875045-26-000075 |
| 2026-07-2906:10 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-26-000073 |
| 2026-07-0116:08 ET | 8-K | 2.02 Results of operations | 0000875045-26-000068 |
| 2026-06-1016:54 ET | 8-K | 5.07 Shareholder vote results | 0000950157-26-000700 |
| 2026-06-1016:49 ET | 8-K/A | 9.01 Financial statements and exhibits | 0000950157-26-000699 |
| 2026-05-1416:36 ET | SCHEDULE 13D/A | Ownership report, active investor, amended | 0000950157-26-000611 |
| 2026-05-1408:31 ET | 8-K | 1.01 Entry into a material agreement; 2.01 Completion of an acquisition or disposition; 2.03 New direct financial obligation; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-26-222908 |
| 2026-04-2906:40 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0000875045-26-000045 |
| 2026-04-2906:05 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-26-000042 |
| 2026-04-2816:34 ET | DEF 14A | Proxy statementPeriod 2026-06-09 | 0001193125-26-187303 |
| 2026-04-0618:08 ET | SCHEDULE 13D | Ownership report, active investor | 0000950157-26-000478 |
| 2026-04-0606:31 ET | 8-K | 2.02 Results of operations | 0000875045-26-000039 |
| 2026-03-3117:03 ET | 8-K | 1.01 Entry into a material agreement; 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-134889 |
| 2026-03-1117:28 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0000950157-26-000280 |
| 2026-02-1117:07 ET | 8-K | 5.02 Departure or appointment of officers or directors; 8.01 Other events | 0001193125-26-046803 |
| 2026-02-0607:36 ET | 10-K | Annual reportPeriod 2025-12-31 | 0000875045-26-000013 |
| 2026-02-0606:55 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-26-000011 |
| 2026-01-1417:38 ET | 8-K | 2.02 Results of operations | 0000875045-26-000003 |
| 2025-10-3006:31 ET | 10-Q | Quarterly reportPeriod 2025-09-30 | 0000875045-25-000049 |
| 2025-10-3006:13 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000047 |
| 2025-10-1416:19 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000040 |
| 2025-07-3106:13 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000035 |
| 2025-07-3106:05 ET | 10-Q | Quarterly reportPeriod 2025-06-30 | 0000875045-25-000033 |
| 2025-07-3017:56 ET | SCHEDULE 13D/A | Ownership report, active investor, amended | 0000950157-25-000596 |
| 2025-07-2121:18 ET | SCHEDULE 13D/A | Ownership report, active investor, amended | 0000950157-25-000586 |
| 2025-07-0716:10 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000027 |
| 2025-06-2316:18 ET | 8-K | 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0000875045-25-000023 |
| 2025-05-1216:45 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-25-117854 |
| 2025-05-0116:48 ET | 10-Q | Quarterly reportPeriod 2025-03-31 | 0000875045-25-000018 |
| 2025-05-0106:52 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000014 |
| 2025-04-2821:38 ET | DEF 14A | Proxy statementPeriod 2025-06-17 | 0001193125-25-097747 |
| 2025-02-1217:28 ET | 10-K | Annual reportPeriod 2024-12-31 | 0000875045-25-000009 |
| 2025-02-1207:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-25-000004 |
| 2025-01-1508:00 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0001193125-25-006578 |
| 2025-01-1017:34 ET | SCHEDULE 13D | Ownership report, active investor | 0000950170-25-004311 |
| 2024-10-3016:45 ET | 8-K | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-247628 |
| 2024-10-3016:31 ET | 10-Q | Quarterly reportPeriod 2024-09-30 | 0000875045-24-000032 |
| 2024-10-3006:55 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-24-000030 |
| 2024-09-1207:31 ET | 8-K | 5.02 Departure or appointment of officers or directors | 0001193125-24-217633 |
| 2024-08-1416:30 ET | 8-K | 1.01 Entry into a material agreement; 1.02 Termination of a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-24-200660 |
| 2024-08-0116:11 ET | 10-Q | Quarterly reportPeriod 2024-06-30 | 0000875045-24-000025 |
| 2024-08-0106:55 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-24-000022 |
| 2024-06-2517:01 ET | 8-K | 5.03 Amendment to articles or bylaws; 5.07 Shareholder vote results; 9.01 Financial statements and exhibits | 0001193125-24-167938 |
| 2024-04-2617:01 ET | DEF 14A | Proxy statementPeriod 2024-06-20 | 0001193125-24-118313 |
| 2024-04-2416:15 ET | 10-Q | Quarterly reportPeriod 2024-03-31 | 0000875045-24-000016 |
| 2024-04-2407:02 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-24-000012 |
| 2024-02-1417:40 ET | 10-K | Annual reportPeriod 2023-12-31 | 0000875045-24-000009 |
| 2024-02-1307:07 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000875045-24-000004 |
Source: SEC EDGAR, the company’s filing index. Last ingested by Listed: Oct 28, 2026, 07:28 ET. Listed shows no prices and gives no investment advice.