# Filing Detail

Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000875045-25-000018
Filing Date
2025-05-01
Accepted
2025-05-01 16:48:23
Documents
134
Period of Report
2025-03-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-Q | biib-20250331.htm iXBRL | 10-Q | 2222469
2 | EX-31.1 | biib-2025331xex311.htm | EX-31.1 | 11230
3 | EX-31.2 | biib-2025331xex312.htm | EX-31.2 | 10657
4 | EX-32.1 | biib-2025331xex321.htm | EX-32.1 | 9292
10 |  | biib-20250331_g1.jpg | GRAPHIC | 62626
11 |  | biib-20250331_g2.jpg | GRAPHIC | 16040
12 |  | biib-20250331_g3.jpg | GRAPHIC | 12078
13 |  | biib-20250331_g4.jpg | GRAPHIC | 15797
14 |  | biib-20250331_g5.jpg | GRAPHIC | 16000
15 |  | biib-20250331_g6.jpg | GRAPHIC | 43706
16 |  | biib-20250331_g7.jpg | GRAPHIC | 69580
17 |  | biib-20250331_g8.jpg | GRAPHIC | 54763
18 |  | biib-20250331_g9.jpg | GRAPHIC | 95228
| Complete submission text file | 0000875045-25-000018.txt |  | 13688093

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
5 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | biib-20250331.xsd | EX-101.SCH | 98014
6 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | biib-20250331_cal.xml | EX-101.CAL | 84003
7 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | biib-20250331_def.xml | EX-101.DEF | 626389
8 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | biib-20250331_lab.xml | EX-101.LAB | 960558
9 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | biib-20250331_pre.xml | EX-101.PRE | 823038
137 | EXTRACTED XBRL INSTANCE DOCUMENT | biib-20250331_htm.xml | XML | 2109393

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: 10-Q | Act: 34 | File No.: 000-19311 | Film No.: 25903992
SIC: 2836 Biological Products, (No Diagnostic Substances)
(CF Office: 03 Life Sciences)