BIOGEN INC. — Director's Dealing 2017

Dec 5, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2017-12-01

Reporting Person: COVINO GREGORY F (VP, Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-12-01	Common Stock	F	54	$319.35	Disposed	4542.3601	Direct
2017-12-01	Common Stock	F	103	$319.35	Disposed	4439.3601	Direct

Footnotes

F1: Includes 86.155 shares and 5.382 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2017 and 6/30/2017, respectively.