BIOGEN INC. — Director's Dealing 2025

Jun 18, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2025-06-17

Reporting Person: Pangalos Menelas N (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-06-17	Restricted Stock Unit	$0	A	2370	Acquired	2026-06-17	Common Stock (2370)	Direct

Footnotes

F1: The restricted stock units vest on the earlier of (i) the next annual meeting or (ii) the anniversary of the date of grant of June 17, 2025.