BIOGEN INC. — Director's Dealing 2023

Feb 3, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2023-02-01

Reporting Person: Singhal Priya (Head of Development)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-01	Restricted Stock Unit	$0	A	5485	Acquired	2026-02-01	Common Stock (5485)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2652.3923	Direct

Footnotes

F1: This award was granted to the reporting person on February 1, 2023 and will vest in three equal installments on each anniversary of the grant date.