BIOGEN INC. — Director's Dealing 2017

Mar 1, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2017-02-27

Reporting Person: Vounatsos Michel (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-02-27	Common Stock	P	1333	$285.39	Acquired	1433.931	Direct

Footnotes

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

F2: Includes 100.9310 shares acquired under the Biogen Inc. employee stock purchase plan on 09/30/16 and 12/30/16.