# Filing Detail

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001193125-21-129025
Filing Date
2021-04-23
Accepted
2021-04-23 16:16:00
Documents
3

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEFA14A | d602779ddefa14a.htm | DEFA14A | 15108
2 | GRAPHIC | g602779g20h20.jpg | GRAPHIC | 390565
3 | GRAPHIC | g602779g25h25.jpg | GRAPHIC | 379205
| Complete submission text file | 0001193125-21-129025.txt |  | 1076890

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: DEFA14A | Act: 34 | File No.: 000-19311 | Film No.: 21849882
SIC: 2836 Biological Products, (No Diagnostic Substances)