Employer with a benefit plan ยท SEC filer
BIOGEN INC.
Also filed as BIOGEN IDEC INC.; IDEC PHARMACEUTICALS CORP / CA; IDEC PHARMACEUTICALS CORP / DE
225 BINNEY STREET, CAMBRIDGE, MA 02142
EIN
33-0112644
SEC CIK
0000875045
SEC · 2026-09-03
Industry (SIC)
Biological Products, (No Diagnostic Substances) (2836)
SEC · 2026-09-03
State of incorporation
DE
SEC · 2026-09-03
Ticker
BIIB
SEC · 2026-09-03
Latest SEC filing
4 2026-09-03
SEC · 2026-09-03
Benefit plan 501, 2024 filing
BIOGEN HEALTH AND WELFARE BENEFIT PLAN
DOL · 2025-10-15
Participants (start of year)
4,733
DOL · 2025-10-15
Plan features
code 4A4B4D4E4F4H4Q
DOL · 2025-10-15
Plan type
Single-employer plan
DOL · 2025-10-15
Business code (NAICS)
325410
DOL · 2025-10-15
Benefit plan 520, 2024 filing
U.S. CHANGE IN CONTROL SEVERANCE PLAN
DOL · 2025-10-15
Participants (start of year)
4,270
DOL · 2025-10-15
Plan features
Severance pay
DOL · 2025-10-15
Plan type
Single-employer plan
DOL · 2025-10-15