BIOGEN INC. — Director's Dealing 2024

Feb 13, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2024-02-09

Reporting Person: Singhal Priya (Head of Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-02-09	Common Stock	M	1212	—	Acquired	5309.0915	Direct
2024-02-09	Common Stock	F	374	$240.98	Disposed	4935.0915	Direct
2024-02-12	Common Stock	S	419	$239.45	Disposed	4516.0915	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-02-09	Restricted Stock Unit	$0	M	1212	Disposed	2025-02-10	Common Stock (1212)	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.