BIOGEN INC. — Director's Dealing 2023

Feb 14, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2023-02-10

Reporting Person: Singhal Priya (Head of Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-02-10	Common Stock	M	1211	—	Acquired	3863.3923	Direct
2023-02-10	Common Stock	F	372	$286.30	Disposed	3491.3923	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-02-10	Restricted Stock Unit	$0	M	1211	Disposed	2025-02-10	Common Stock (1211)	Direct

Footnotes

F1: This award was granted to the reporting person on February 10, 2022 and will vest in three equal installments on each anniversary of the grant date.