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: Gregory Ginger (EVP, Human Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-02-09	Common Stock	M	2158	—	Acquired	11777.716	Direct
2024-02-09	Common Stock	F	634	$240.98	Disposed	11143.716	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-02-09	Restricted Stock Unit	$0	M	2158	Disposed	2025-02-10	Common Stock (2158)	Direct

Footnotes

F1: The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 10, 2022.