BIOGEN INC. — Director's Dealing 2024

Apr 3, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2024-04-01

Reporting Person: Murphy Nicole (Head of Pharm Ops and Tech)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-04-01	Common Stock	M	240	—	Acquired	9751.3741	Direct
2024-04-01	Common Stock	F	117	$214.83	Disposed	9634.3741	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-04-01	Restricted Stock Unit	$0	M	240	Disposed	2024-04-01	Common Stock (240)	Direct

Footnotes

F1: 1. Includes 93.3846 shares acquired under the Biogen Inc. employee stock purchase plan on 3/28/2024.

F2: This award was granted to the reporting person on April 1, 2021. The final portion of the awards vested on the third anniversary of the grant date.