BIOGEN INC. — DEFA14A Filings
84 DEFA14A filings on record
This page lists all DEFA14A 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 84 DEFA14A 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 |
|---|---|---|---|---|
| DEFA14A | DEFA14A | 0001193125-25-132885 | Jun 2, 2025 | — |
| DEFA14A | DEFA14A | 0001193125-25-097749 | Apr 28, 2025 | — |
| DEFA14A | DEFA14A | 0001193125-24-118335 | Apr 26, 2024 | — |
| DEFA14A | DEFA14A | 0001193125-23-198545 | Jul 31, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-23-196809 | Jul 28, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-23-165725 | Jun 13, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-23-165434 | Jun 12, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-23-127651 | Apr 28, 2023 | — |
| DEFA14A | DEFA14A | 0001193125-22-169323 | Jun 7, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-22-130209 | Apr 29, 2022 | — |
| DEFA14A | DEFA14A | 0001193125-21-129025 | Apr 23, 2021 | — |
| DEFA14A | DEFA14A | 0000875045-21-000020 | Apr 9, 2021 | — |
| DEFA14A | DEFA14A | 0001193125-20-112185 | Apr 20, 2020 | — |
| DEFA14A | DEFA14A | 0001193125-19-156990 | May 24, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-19-129304 | Apr 30, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-19-125090 | Apr 29, 2019 | — |
| DEFA14A | DEFA14A | 0001193125-18-138875 | Apr 27, 2018 | — |
| DEFA14A | DEFA14A | 0001193125-17-139464 | Apr 26, 2017 | — |
| DEFA14A | DEFA14A | 0001193125-16-542456 | Apr 15, 2016 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-15-159402 | Apr 30, 2015 | — |
| DEFA14A | DEFA14A | 0001193125-14-169484 | Apr 30, 2014 | — |
| DEFA14A | DEFINITIVE ADDITIONAL MATERIALS | 0001193125-13-187207 | Apr 30, 2013 | — |
| DEFA14A | SCHEDULE 14A | 0001193125-12-191037 | Apr 27, 2012 | — |
| DEFA14A | DEFA14A | 0000950123-11-037801 | Apr 21, 2011 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950123-10-023139 | Mar 10, 2010 | — |
| DEFA14A | DEFA14A | 0000950123-10-023128 | Mar 10, 2010 | — |
| DEFA14A | DEFA14A | 0000950123-10-013729 | Feb 17, 2010 | — |
| DEFA14A | FORM DEFA14A | 0000950123-10-010200 | Feb 9, 2010 | — |
| DEFA14A | FORM 8-K | 0000950123-10-005933 | Jan 28, 2010 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-004365 | May 29, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004316 | May 27, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004287 | May 27, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004246 | May 26, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004245 | May 26, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004112 | May 19, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004055 | May 15, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004054 | May 15, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-004051 | May 15, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-003983 | May 14, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-003640 | May 6, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-003254 | Apr 29, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-003150 | Apr 27, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-002899 | Apr 17, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-002872 | Apr 16, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-002869 | Apr 16, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-002066 | Mar 26, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-002047 | Mar 25, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-002046 | Mar 25, 2009 | — |
| DEFA14A | BIOGEN IDEC, INC. | 0000950135-09-001827 | Mar 18, 2009 | — |
| DEFA14A | BIOGEN IDEC INC. | 0000950135-09-001805 | Mar 17, 2009 | — |