BIOGEN INC. — 8-K Filings
282 8-K filings on record
This page lists all 8-K filings submitted to the SEC by BIOGEN INC. (BIIB), sorted by most recent first. Each row links to the full filing on EdgarLookup. BIOGEN INC. has filed 282 8-K documents with the SEC since 2014. To view all SEC filings by BIOGEN INC., see the full filings list.
All
10-C
10-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
11-K
144
3
3/A
4
4/A
424B2
424B3
424B4
425
5
8-A12B
8-A12G/A
8-B12G
8-K
8-K/A
ARS
CORRESP
CT ORDER
DEF 14A
DEFA14A
DEFC14A
DEFR14A
DFAN14A
DFRN14A
EFFECT
FWP
NO ACT
NT 10-K
NT 10-Q
POS AM
POS EX
PRE 14A
PREC14A
PRER14A
PRES14A
PRRN14A
PX14A6G
RW
S-3
S-3/A
S-3ASR
S-3MEF
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SC TO-C
SC TO-I
SC TO-I/A
SC TO-T
SC TO-T/A
SCHEDULE 13D
SCHEDULE 13D/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 8-K | CURRENT REPORT | 0000950157-26-000280 | Mar 11, 2026 | — |
| 8-K | 8-K | 0001193125-26-046803 | Feb 11, 2026 | — |
| 8-K | 8-K | 0000875045-26-000011 | Feb 6, 2026 | — |
| 8-K | 8-K | 0000875045-26-000003 | Jan 14, 2026 | Jan 13, 2026 |
| 8-K | 8-K | 0000875045-25-000047 | Oct 30, 2025 | — |
| 8-K | 8-K | 0000875045-25-000040 | Oct 14, 2025 | — |
| 8-K | 8-K | 0000875045-25-000035 | Jul 31, 2025 | — |
| 8-K | 8-K | 0000875045-25-000027 | Jul 7, 2025 | — |
| 8-K | 8-K | 0000875045-25-000023 | Jun 23, 2025 | Jun 17, 2025 |
| 8-K | 8-K | 0001193125-25-117854 | May 12, 2025 | May 6, 2025 |
| 8-K | 8-K | 0000875045-25-000014 | May 1, 2025 | — |
| 8-K | 8-K | 0000875045-25-000004 | Feb 12, 2025 | — |
| 8-K | 8-K | 0001193125-25-006578 | Jan 15, 2025 | Jan 13, 2025 |
| 8-K | 8-K | 0000875045-24-000030 | Oct 30, 2024 | — |
| 8-K | 8-K | 0001193125-24-247628 | Oct 30, 2024 | Oct 28, 2024 |
| 8-K | 8-K | 0001193125-24-217633 | Sep 12, 2024 | Sep 11, 2024 |
| 8-K | 8-K | 0001193125-24-200660 | Aug 14, 2024 | Aug 12, 2024 |
| 8-K | 8-K | 0000875045-24-000022 | Aug 1, 2024 | — |
| 8-K | 8-K | 0001193125-24-167938 | Jun 25, 2024 | Jun 20, 2024 |
| 8-K | 8-K | 0000875045-24-000012 | Apr 24, 2024 | — |
| 8-K | 8-K | 0000875045-24-000004 | Feb 13, 2024 | — |
| 8-K | 8-K | 0001193125-23-293433 | Dec 12, 2023 | Dec 6, 2023 |
| 8-K | 8-K | 0001193125-23-273579 | Nov 8, 2023 | Nov 6, 2023 |
| 8-K | 8-K | 0000875045-23-000035 | Nov 8, 2023 | — |
| 8-K | 8-K | 0001193125-23-242617 | Sep 26, 2023 | — |
| 8-K | 8-K | 0001193125-23-227692 | Sep 1, 2023 | Aug 28, 2023 |
| 8-K | FORM 8-K | 0001193125-23-198542 | Jul 31, 2023 | Jul 28, 2023 |
| 8-K | 8-K | 0001193125-23-196808 | Jul 28, 2023 | — |
| 8-K | 8-K | 0000875045-23-000027 | Jul 25, 2023 | — |
| 8-K | 8-K | 0000875045-23-000024 | Jun 29, 2023 | Jun 26, 2023 |
| 8-K | 8-K | 0001193125-23-133476 | May 3, 2023 | — |
| 8-K | 8-K | 0000875045-23-000012 | Apr 25, 2023 | — |
| 8-K | 8-K | 0001193125-23-105074 | Apr 18, 2023 | Apr 12, 2023 |
| 8-K | 8-K | 0001193125-23-064961 | Mar 9, 2023 | Mar 5, 2023 |
| 8-K | 8-K | 0000875045-23-000005 | Feb 15, 2023 | — |
| 8-K | 8-K | 0001193125-22-281950 | Nov 10, 2022 | — |
| 8-K | 8-K | 0000875045-22-000028 | Oct 25, 2022 | — |
| 8-K | 8-K | 0000875045-22-000020 | Jul 20, 2022 | — |
| 8-K | 8-K | 0001193125-22-177791 | Jun 21, 2022 | Jun 15, 2022 |
| 8-K | 8-K | 0000875045-22-000013 | May 3, 2022 | — |
| 8-K | 8-K | 0000875045-22-000003 | Feb 3, 2022 | — |
| 8-K | FORM 8-K | 0001193125-22-022381 | Jan 31, 2022 | Jan 25, 2022 |
| 8-K | 8-K | 0001193125-21-334519 | Nov 19, 2021 | Nov 18, 2021 |
| 8-K | 8-K | 0001193125-21-331813 | Nov 17, 2021 | Nov 15, 2021 |
| 8-K | 8-K | 0000875045-21-000049 | Oct 20, 2021 | — |
| 8-K | 8-K | 0000875045-21-000041 | Jul 22, 2021 | — |
| 8-K | 8-K | 0000875045-21-000032 | Jun 8, 2021 | Jun 2, 2021 |
| 8-K | 8-K | 0000875045-21-000025 | Apr 22, 2021 | — |
| 8-K | 8-K | 0000875045-21-000018 | Apr 9, 2021 | Apr 7, 2021 |
| 8-K | 8-K | 0001193125-21-044891 | Feb 16, 2021 | — |