BIOGEN INC. — Director's Dealing 2024

Dec 9, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2024-12-06

Reporting Person: Kramer Robin (Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-12-06	Common Stock	M	351	—	Acquired	6577.7483	Direct
2024-12-06	Common Stock	F	170	$157.78	Disposed	6407.7483	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-12-06	Restricted Stock Unit	$0	M	351	Disposed	2024-12-08	Common Stock (351)	Direct

Footnotes

F1: The restricted stock units vest in three (3) equal annual installments commencing on the first anniversary of the grant date of 12/8/2021.