# Filing Detail

Form DEF 14A - Other definitive proxy statements:
SEC Accession No. 0001193125-25-097747
Filing Date
2025-04-28
Accepted
2025-04-25 21:38:16
Documents
61
Period of Report
2025-06-17

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEF 14A | d916837ddef14a.htm iXBRL | DEF 14A | 1711400
6 | GRAPHIC | g916837dsp001.jpg | GRAPHIC | 136160
7 | GRAPHIC | g916837dsp002.jpg | GRAPHIC | 143644
8 | GRAPHIC | g916837g00a11.jpg | GRAPHIC | 27166
9 | GRAPHIC | g916837g00s01.jpg | GRAPHIC | 610051
10 | GRAPHIC | g916837g00s02.jpg | GRAPHIC | 50879
11 | GRAPHIC | g916837g00s03.jpg | GRAPHIC | 608869
12 | GRAPHIC | g916837g00s04.jpg | GRAPHIC | 52808
13 | GRAPHIC | g916837g00s05.jpg | GRAPHIC | 50875
14 | GRAPHIC | g916837g00s07.jpg | GRAPHIC | 47548
15 | GRAPHIC | g916837g00s08.jpg | GRAPHIC | 49488
16 | GRAPHIC | g916837g00s09.jpg | GRAPHIC | 49957
17 | GRAPHIC | g916837g00s13.jpg | GRAPHIC | 594
18 | GRAPHIC | g916837g00s14.jpg | GRAPHIC | 612
19 | GRAPHIC | g916837g00s15.jpg | GRAPHIC | 618
20 | GRAPHIC | g916837g00s16.jpg | GRAPHIC | 591
21 | GRAPHIC | g916837g01a01.jpg | GRAPHIC | 53624
22 | GRAPHIC | g916837g02a02.jpg | GRAPHIC | 36107
23 | GRAPHIC | g916837g06t01.jpg | GRAPHIC | 41001
24 | GRAPHIC | g916837g06t02.jpg | GRAPHIC | 32765
25 | GRAPHIC | g916837g07s08.jpg | GRAPHIC | 45607
26 | GRAPHIC | g916837g08a09.jpg | GRAPHIC | 24573
27 | GRAPHIC | g916837g10w09.jpg | GRAPHIC | 97919
28 | GRAPHIC | g916837g17a01.jpg | GRAPHIC | 16410
29 | GRAPHIC | g916837g17a02.jpg | GRAPHIC | 16435
30 | GRAPHIC | g916837g17a03.jpg | GRAPHIC | 18495
31 | GRAPHIC | g916837g17a04.jpg | GRAPHIC | 16878
32 | GRAPHIC | g916837g17a05.jpg | GRAPHIC | 17604
33 | GRAPHIC | g916837g17a06.jpg | GRAPHIC | 20993
34 | GRAPHIC | g916837g17a07.jpg | GRAPHIC | 19943
35 | GRAPHIC | g916837g17a08.jpg | GRAPHIC | 18440
36 | GRAPHIC | g916837g17a09.jpg | GRAPHIC | 21227
37 | GRAPHIC | g916837g25a02.jpg | GRAPHIC | 37088
38 | GRAPHIC | g916837g25a03.jpg | GRAPHIC | 40591
39 | GRAPHIC | g916837g25a05.jpg | GRAPHIC | 42046
40 | GRAPHIC | g916837g34a34.jpg | GRAPHIC | 83037
41 | GRAPHIC | g916837g41k61.jpg | GRAPHIC | 38185
42 | GRAPHIC | g916837g48a01.jpg | GRAPHIC | 25801
43 | GRAPHIC | g916837g82u01.jpg | GRAPHIC | 31350
44 | GRAPHIC | g916837g82u02.jpg | GRAPHIC | 32966
45 | GRAPHIC | g916837g82u03.jpg | GRAPHIC | 29499
46 | GRAPHIC | g916837g82u04.jpg | GRAPHIC | 18127
47 | GRAPHIC | g916837g84y02.jpg | GRAPHIC | 20273
48 | GRAPHIC | g916837g84y03.jpg | GRAPHIC | 17529
49 | GRAPHIC | g916837g87p87.jpg | GRAPHIC | 41170
50 | GRAPHIC | g916837g88h88.jpg | GRAPHIC | 43183
| Complete submission text file | 0001193125-25-097747.txt |  | 8981191

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
2 | XBRL TAXONOMY EXTENSION SCHEMA | biib-20241231.xsd | EX-101.SCH | 3508
3 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE | biib-20241231_def.xml | EX-101.DEF | 2579
4 | XBRL TAXONOMY EXTENSION LABEL LINKBASE | biib-20241231_lab.xml | EX-101.LAB | 2668
5 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE | biib-20241231_pre.xml | EX-101.PRE | 1680
63 | EXTRACTED XBRL INSTANCE DOCUMENT | d916837ddef14a_htm.xml | XML | 281284

Mailing Address 225 BINNEY STREET CAMBRIDGE MA 02142
Business Address 225 BINNEY STREET CAMBRIDGE MA 02142 7814642000
BIOGEN INC. (Filer) CIK: 0000875045 (see all company filings)

EIN.: 330112644 | State of Incorp.: DE | Fiscal Year End: 1231
Type: DEF 14A | Act: 34 | File No.: 000-19311 | Film No.: 25875782
SIC: 2836 Biological Products, (No Diagnostic Substances)
(CF Office: 03 Life Sciences)