# Filing Detail

Form ARS - Annual Report to Security Holders:
SEC Accession No. 0001193125-25-097750
Filing Date
2025-04-28
Accepted
2025-04-25 21:42:07
Documents
1
Period of Report
2024-12-31
Effectiveness Date
2025-04-28

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | ARS | d899677dars.pdf | ARS | 4473513
| Complete submission text file | 0001193125-25-097750.txt |  | 6163179

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: ARS | Act: 34 | File No.: 000-19311 | Film No.: 25875788
SIC: 2836 Biological Products, (No Diagnostic Substances)
(CF Office: 03 Life Sciences)