BIOGEN INC. — DEF 14A Filings
28 DEF 14A filings on record
This page lists all DEF 14A 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 28 DEF 14A 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 |
|---|---|---|---|---|
| DEF 14A | DEF 14A | 0001193125-25-097747 | Apr 28, 2025 | Jun 17, 2025 |
| DEF 14A | DEF 14A | 0001193125-24-118313 | Apr 26, 2024 | Jun 20, 2024 |
| DEF 14A | DEF 14A | 0001193125-23-127639 | Apr 28, 2023 | — |
| DEF 14A | DEF 14A | 0001193125-22-130205 | Apr 29, 2022 | Jun 15, 2022 |
| DEF 14A | DEF 14A | 0001193125-21-129003 | Apr 23, 2021 | Jun 2, 2021 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-20-112182 | Apr 20, 2020 | Jun 3, 2020 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-19-129278 | Apr 30, 2019 | Jun 19, 2019 |
| DEF 14A | DEF 14A | 0001193125-18-138852 | Apr 27, 2018 | Jun 12, 2018 |
| DEF 14A | DEF 14A | 0001193125-17-139450 | Apr 26, 2017 | Jun 7, 2017 |
| DEF 14A | DEF 14A | 0001193125-16-542448 | Apr 15, 2016 | Jun 8, 2016 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-15-159387 | Apr 30, 2015 | Jun 10, 2015 |
| DEF 14A | DEF 14A | 0001193125-14-169472 | Apr 30, 2014 | Jun 12, 2014 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0001193125-13-187159 | Apr 30, 2013 | Jun 12, 2013 |
| DEF 14A | DEF 14A | 0001193125-12-191025 | Apr 27, 2012 | Jun 8, 2012 |
| DEF 14A | DEF 14A | 0000950123-11-037799 | Apr 21, 2011 | Jun 2, 2011 |
| DEF 14A | BIOGEN IDEC, INC. | 0000950123-10-039661 | Apr 28, 2010 | Jun 9, 2010 |
| DEF 14A | BIOGEN IDEC, INC. | 0000950135-07-002428 | Apr 25, 2007 | May 31, 2007 |
| DEF 14A | BIOGEN IDEC, INC. | 0000950135-06-002398 | Apr 14, 2006 | May 25, 2006 |
| DEF 14A | BIOGEN IDEC INC. | 0000950135-05-002047 | Apr 15, 2005 | Jun 3, 2005 |
| DEF 14A | BIOGEN IDEC, INC. | 0000950135-04-002162 | Apr 29, 2004 | Jun 16, 2004 |
| DEF 14A | DEF 14A | 0001047469-03-013113 | Apr 11, 2003 | May 19, 2003 |
| DEF 14A | DEF 14A | 0000912057-02-014879 | Apr 12, 2002 | May 23, 2002 |
| DEF 14A | DEF 14A | 0000912057-01-508624 | Apr 13, 2001 | May 18, 2001 |
| DEF 14A | DEFINITIVE NOTICE & PROXY STATEMENT | 0001095811-00-000989 | Apr 14, 2000 | May 17, 2000 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000936392-99-001239 | Nov 4, 1999 | Dec 1, 1999 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000936392-99-000428 | Apr 15, 1999 | May 20, 1999 |
| DEF 14A | DEFINITIVE PROXY STATEMENT | 0000936392-98-000577 | Apr 10, 1998 | May 21, 1998 |
| DEF 14A | DEFINITIVE NOTICE AND PROXY STATEMENT | 0000891618-97-001842 | Apr 22, 1997 | May 22, 1997 |