BIOGEN INC. — Director's Dealing 2021

Jan 29, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2021-01-27

Reporting Person: Galdes Alphonse (EVP Pharmaceutical Oper & Tech)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-01-27	Common Stock	A	818	—	Acquired	3445.229	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	969.366	Indirect

Footnotes

F1: Represents shares earned upon satisfaction of certain performance conditions associated with performance stock units granted on February 12, 2018. The shares will vest on February 12, 2021.

F2: Includes 84.965 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2020.