BIOGEN INC. — Director's Dealing 2021

Jun 9, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2021-06-07

Reporting Person: Sandrock Alfred (Head of Research & Development)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-06-07	Common Stock	S	7672	$440.00	Disposed	10169.1121	Direct

Footnotes

F1: Sale pursuant to a trading plan intended to comply with Rule 10b5-1 of the Securities Exchange Act of 1934.

F2: Includes 102.902 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2021.