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Biogen Inc SEC Filings
What Biogen Inc has told the SEC happened, by the 8-K items and forms it filed under: when it reported results, who joined or left, what it bought or sold, and whether its auditor or its accounts ever changed.
BIIB overview →Filings on file
128
since Oct 26, 2016
Warning signs
0
none filed
Last results
Jul 29, 2026
8-K item 2.02
Industry
Biological Products, (No Diagnostic Substances)
SIC 2836
Newest first
Each label is a form type or an 8-K item as filed; each row links to the filing.
| Filed | What it reports | Document |
|---|---|---|
| Jul 29, 2026 | Quarterly report 10-Q | Read ↗ |
| Jul 29, 2026 | Results announced 8-K | Read ↗ |
| Jul 1, 2026 | Results announced 8-K | Read ↗ |
| Jun 10, 2026 | Shareholder vote 8-K | Read ↗ |
| May 14, 2026 | Acquisition or sale completedMaterial agreementNew debt 8-K | Read ↗ |
| Apr 29, 2026 | Quarterly report 10-Q | Read ↗ |
| Apr 29, 2026 | Results announced 8-K | Read ↗ |
| Apr 14, 2026 | Tender offer SC TO-T | Read ↗ |
| Apr 6, 2026 | Results announced 8-K | Read ↗ |
| Mar 31, 2026 | Material agreement 8-K | Read ↗ |
| Mar 11, 2026 | Executive or director change 8-K | Read ↗ |
| Feb 11, 2026 | Executive or director change 8-K | Read ↗ |
| Feb 6, 2026 | Annual report 10-K | Read ↗ |
| Feb 6, 2026 | Results announced 8-K | Read ↗ |
| Jan 14, 2026 | Results announced 8-K | Read ↗ |
| Oct 30, 2025 | Quarterly report 10-Q | Read ↗ |
| Oct 30, 2025 | Results announced 8-K | Read ↗ |
| Oct 14, 2025 | Results announced 8-K | Read ↗ |
| Jul 31, 2025 | Results announced 8-K | Read ↗ |
| Jul 31, 2025 | Quarterly report 10-Q | Read ↗ |
| Jul 7, 2025 | Results announced 8-K | Read ↗ |
| Jun 23, 2025 | Shareholder vote 8-K | Read ↗ |
| May 1, 2025 | Quarterly report 10-Q | Read ↗ |
| May 1, 2025 | Results announced 8-K | Read ↗ |
| Feb 12, 2025 | Annual report 10-K | Read ↗ |
| Feb 12, 2025 | Results announced 8-K | Read ↗ |
| Jan 15, 2025 | Executive or director change 8-K | Read ↗ |
| Oct 30, 2024 | Executive or director change 8-K | Read ↗ |
| Oct 30, 2024 | Quarterly report 10-Q | Read ↗ |
| Oct 30, 2024 | Results announced 8-K | Read ↗ |
| Sep 12, 2024 | Executive or director change 8-K | Read ↗ |
| Aug 14, 2024 | Material agreementNew debt 8-K | Read ↗ |
| Aug 1, 2024 | Quarterly report 10-Q | Read ↗ |
| Aug 1, 2024 | Results announced 8-K | Read ↗ |
| Jun 25, 2024 | Shareholder vote 8-K | Read ↗ |
| Apr 24, 2024 | Quarterly report 10-Q | Read ↗ |
| Apr 24, 2024 | Results announced 8-K | Read ↗ |
| Feb 14, 2024 | Annual report 10-K | Read ↗ |
| Feb 13, 2024 | Results announced 8-K | Read ↗ |
| Nov 8, 2023 | Executive or director change 8-K | Read ↗ |
| Nov 8, 2023 | Quarterly report 10-Q | Read ↗ |
| Nov 8, 2023 | Results announced 8-K | Read ↗ |
| Sep 28, 2023 | Shareholder vote 8-K/A | Read ↗ |
| Sep 1, 2023 | Material agreementNew debt 8-K | Read ↗ |
| Jul 31, 2023 | Material agreement 8-K | Read ↗ |
| Jul 25, 2023 | Quarterly report 10-Q | Read ↗ |
| Jul 25, 2023 | Results announced 8-K | Read ↗ |
| Jun 29, 2023 | Shareholder vote 8-K | Read ↗ |
| Apr 25, 2023 | Quarterly report 10-Q | Read ↗ |
| Apr 25, 2023 | Results announced 8-K | Read ↗ |
| Mar 9, 2023 | Executive or director change 8-K | Read ↗ |
| Feb 15, 2023 | Annual report 10-K | Read ↗ |
| Feb 15, 2023 | Results announced 8-K | Read ↗ |
| Nov 10, 2022 | Executive or director change 8-K | Read ↗ |
| Oct 25, 2022 | Quarterly report 10-Q | Read ↗ |
| Oct 25, 2022 | Results announced 8-K | Read ↗ |
| Jul 20, 2022 | Quarterly report 10-Q | Read ↗ |
| Jul 20, 2022 | Results announced 8-K/A | Read ↗ |
| Jul 20, 2022 | Results announced 8-K | Read ↗ |
| Jun 21, 2022 | Executive or director changeShareholder vote 8-K | Read ↗ |
| May 17, 2022 | Merger vote or registration S-4 | Read ↗ |
| May 3, 2022 | Quarterly report 10-Q | Read ↗ |
| May 3, 2022 | Executive or director changeResults announced 8-K | Read ↗ |
| Feb 3, 2022 | Annual report 10-K | Read ↗ |
| Feb 3, 2022 | Results announced 8-K | Read ↗ |
| Jan 31, 2022 | Executive or director change 8-K | Read ↗ |
| Nov 17, 2021 | Executive or director change 8-K | Read ↗ |
| Oct 20, 2021 | Quarterly report 10-Q | Read ↗ |
| Oct 20, 2021 | Results announced 8-K | Read ↗ |
| Jul 22, 2021 | Quarterly report 10-Q | Read ↗ |
| Jul 22, 2021 | Results announced 8-K | Read ↗ |
| Jun 8, 2021 | Shareholder vote 8-K | Read ↗ |
| Apr 22, 2021 | Quarterly report 10-Q | Read ↗ |
| Apr 22, 2021 | Results announced 8-K | Read ↗ |
| Apr 9, 2021 | Executive or director change 8-K | Read ↗ |
| Feb 3, 2021 | Annual report 10-K | Read ↗ |
| Feb 3, 2021 | Results announced 8-K | Read ↗ |
| Oct 21, 2020 | Quarterly report 10-Q | Read ↗ |
| Oct 21, 2020 | Results announced 8-K | Read ↗ |
| Sep 21, 2020 | Executive or director change 8-K | Read ↗ |
| Jul 22, 2020 | Quarterly report 10-Q | Read ↗ |
| Jul 22, 2020 | Results announced 8-K | Read ↗ |
| Jul 22, 2020 | Executive or director change 8-K | Read ↗ |
| Jun 5, 2020 | Shareholder vote 8-K | Read ↗ |
| Apr 23, 2020 | Quarterly report 10-Q | Read ↗ |
| Apr 22, 2020 | Results announced 8-K | Read ↗ |
| Apr 20, 2020 | Executive or director change 8-K | Read ↗ |
| Feb 6, 2020 | Annual report 10-K | Read ↗ |
| Feb 3, 2020 | Material agreementNew debt 8-K | Read ↗ |
| Jan 30, 2020 | Results announced 8-K | Read ↗ |
| Oct 22, 2019 | Quarterly report 10-Q | Read ↗ |
| Oct 1, 2019 | Executive or director change 8-K | Read ↗ |
| Jul 24, 2019 | Quarterly report 10-Q | Read ↗ |
| Jul 23, 2019 | Results announced 8-K | Read ↗ |
| Jun 20, 2019 | Shareholder vote 8-K | Read ↗ |
| May 15, 2019 | Executive or director change 8-K | Read ↗ |
| Apr 24, 2019 | Quarterly report 10-Q | Read ↗ |
| Apr 24, 2019 | Results announced 8-K | Read ↗ |
| Feb 6, 2019 | Annual report 10-K | Read ↗ |
| Jan 29, 2019 | Results announced 8-K | Read ↗ |
| Nov 1, 2018 | Executive or director change 8-K | Read ↗ |
| Oct 23, 2018 | Quarterly report 10-Q | Read ↗ |
| Oct 23, 2018 | Results announced 8-K | Read ↗ |
| Jul 24, 2018 | Quarterly report 10-Q | Read ↗ |
| Jul 24, 2018 | Results announced 8-K | Read ↗ |
| Jun 26, 2018 | Executive or director change 8-K | Read ↗ |
| Jun 15, 2018 | Shareholder vote 8-K | Read ↗ |
| Apr 24, 2018 | Quarterly report 10-Q | Read ↗ |
| Apr 24, 2018 | Results announced 8-K | Read ↗ |
| Feb 1, 2018 | Annual report 10-K | Read ↗ |
| Jan 25, 2018 | Results announced 8-K | Read ↗ |
| Nov 21, 2017 | Executive or director change 8-K | Read ↗ |
| Oct 24, 2017 | Quarterly report 10-Q | Read ↗ |
| Oct 24, 2017 | Results announced 8-K | Read ↗ |
| Jul 25, 2017 | Quarterly report 10-Q | Read ↗ |
| Jul 25, 2017 | Results announced 8-K | Read ↗ |
| Jun 13, 2017 | Executive or director change 8-K | Read ↗ |
| Jun 9, 2017 | Executive or director changeShareholder vote 8-K | Read ↗ |
| Apr 25, 2017 | Quarterly report 10-Q | Read ↗ |
| Apr 25, 2017 | Results announced 8-K | Read ↗ |
| Feb 2, 2017 | Annual report 10-K | Read ↗ |
| Feb 2, 2017 | Acquisition or sale completedMaterial agreement 8-K | Read ↗ |
| Feb 1, 2017 | Material agreement 8-K | Read ↗ |
| Jan 26, 2017 | Results announced 8-K | Read ↗ |
| Jan 17, 2017 | Material agreement 8-K | Read ↗ |
| Dec 19, 2016 | Executive or director change 8-K | Read ↗ |
| Oct 26, 2016 | Quarterly report 10-Q | Read ↗ |
| Oct 26, 2016 | Results announced 8-K | Read ↗ |
Source: Biogen Inc's EDGAR filing history, the last ten years. The labels are the form types and 8-K item numbers the company filed under, not a reading of what it wrote — an item 5.02 can be a chief executive fired or a director retiring on schedule — so each row links to the filing.
More on BIIB
Company overviewEverything on BIIB in one place, with the price.Insider tradingWhat BIIB's own officers and directors buy and sell.Who owns itEvery manager reporting a position in BIIB.Funds holding itWhich funds and ETFs hold BIIB, and how big a bet.LobbyingWhat BIIB spends lobbying Congress, and on what.Who lobbies for itThe lobbyists on BIIB's account, and who they worked for.Federal contractsWhat federal agencies pay BIIB.PatentsWhat BIIB is filing at the patent office.