U.S. CHANGE IN CONTROL SEVERANCE PLAN

[ EIN: 33-0112644 | Plan No. 520 ]

U.S. CHANGE IN CONTROL SEVERANCE PLAN, sponsored by BIOGEN INC., appears in Form 5500 filings as a DFE/Master Trust plan. The plan reported 0 participants and total assets of $0 during the 2023 reporting period.

These filings allow insight into employer-sponsored plan structure, participation levels, and financial data.

---

Plan Sponsor: BIOGEN INC.

Location: 225 BINNEY STREET, CAMBRIDGE, MA 02142

EIN: 330112644

Plan Number: 520

Plan Year: 2023

Plan Size: Large Plan

Plan Entity Type: DFE/Master Trust

Plan Type: DFE/Master Trust

Participants: 0

Total Assets: $0

---