BIOGEN INC. — Director's Dealing 2023

Jul 5, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2023-06-30

Reporting Person: Singhal Priya (Head of Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-06-30	Common Stock	M	315	—	Acquired	3158.0915	Direct
2023-06-30	Common Stock	F	153	$284.85	Disposed	3005.0915	Direct
2023-07-03	Common Stock	S	81	$282.87	Disposed	2924.0915	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2023-06-30	Restricted Stock Unit	$0	M	315	Disposed	2023-07-01	Common Stock (315)	Direct

Footnotes

F1: This award was granted to the reporting person on July 1, 2020 and vested in three equal installments on each anniversary of the grant date.