BIOGEN INC. — Director's Dealing 2023

Dec 12, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2023-12-08

Reporting Person: Kramer Robin (Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-12-08	Common Stock	M	351	—	Acquired	4324.7483	Direct
2023-12-08	Common Stock	F	170	$239.29	Disposed	4154.7483	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-12-08	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.