Biogen Inc. SEC filings BIIB
Biogen Inc. has 1,001 filings in SEC EDGAR's recent list, going back to Oct 2, 2014. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 30, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 30, 2026 |
| 10-Q | Quarterly report | Apr 29, 2026 | Mar 31, 2026 |
| 10-Q | Quarterly report | Oct 30, 2025 | Sep 30, 2025 |
| 10-Q | Quarterly report | Jul 31, 2025 | Jun 30, 2025 |
| 10-Q | Quarterly report | May 1, 2025 | Mar 31, 2025 |
| 10-Q | Quarterly report | Oct 30, 2024 | Sep 30, 2024 |
| 10-Q | Quarterly report | Aug 1, 2024 | Jun 30, 2024 |
| 10-Q | Quarterly report | Apr 24, 2024 | Mar 31, 2024 |
| 10-Q | Quarterly report | Nov 8, 2023 | Sep 30, 2023 |
| 10-Q | Quarterly report | Jul 25, 2023 | Jun 30, 2023 |
| 10-Q | Quarterly report | Apr 25, 2023 | Mar 31, 2023 |
| 10-Q | Quarterly report | Oct 25, 2022 | Sep 30, 2022 |
| 10-Q | Quarterly report | Jul 20, 2022 | Jun 30, 2022 |
| 10-Q | Quarterly report | May 3, 2022 | Mar 31, 2022 |
| 10-Q | Quarterly report | Oct 20, 2021 | Sep 30, 2021 |
| 10-Q | Quarterly report | Jul 22, 2021 | Jun 30, 2021 |
| 10-Q | Quarterly report | Apr 22, 2021 | Mar 31, 2021 |
| 10-Q | Quarterly report | Oct 21, 2020 | Sep 30, 2020 |
| 10-Q | Quarterly report | Jul 22, 2020 | Jun 30, 2020 |
| 10-Q | Quarterly report | Apr 23, 2020 | Mar 31, 2020 |
| 10-Q | Quarterly report | Oct 22, 2019 | Sep 30, 2019 |
| 10-Q | Quarterly report | Jul 24, 2019 | Jun 30, 2019 |
| 10-Q | Quarterly report | Apr 24, 2019 | Mar 31, 2019 |
| 10-Q | Quarterly report | Oct 23, 2018 | Sep 30, 2018 |
| 10-Q | Quarterly report | Jul 24, 2018 | Jun 30, 2018 |
| 10-Q | Quarterly report | Apr 24, 2018 | Mar 31, 2018 |
| 10-Q | Quarterly report | Oct 24, 2017 | Sep 30, 2017 |
| 10-Q | Quarterly report | Jul 25, 2017 | Jun 30, 2017 |
| 10-Q | Quarterly report | Apr 25, 2017 | Mar 31, 2017 |
| 10-Q | Quarterly report | Oct 26, 2016 | Sep 30, 2016 |
| 10-Q | Quarterly report | Jul 21, 2016 | Jun 30, 2016 |
| 10-Q | Quarterly report | Apr 21, 2016 | Mar 31, 2016 |
| 10-Q | Quarterly report | Oct 21, 2015 | Sep 30, 2015 |
| 10-Q | Quarterly report | Jul 24, 2015 | Jun 30, 2015 |
| 10-Q | Quarterly report | Apr 24, 2015 | Mar 31, 2015 |
| 10-Q | Quarterly report | Oct 22, 2014 | Sep 30, 2014 |
Showing 37 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- BIIB (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Cambridge, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 875045
- Former names
- BIOGEN IDEC INC. (until Mar 20, 2015); BIOGEN IDEC INC (until Apr 25, 2007); IDEC PHARMACEUTICALS CORP / DE (until Nov 12, 2003); IDEC PHARMACEUTICALS CORP / CA (until Feb 14, 1997)
Other Biological Products, (No Diagnostic Substances) companies
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.