BIOGEN INC. — Director's Dealing 2019

Mar 19, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2019-03-18

Reporting Person: PANGIA ROBERT W (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-03-18	Common Stock	M	6114	$52.22	Acquired	24701	Direct
2019-03-18	Common Stock	S	6114	$328.55	Disposed	18587	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2019-03-18	Stock Option (Right to Buy)	$53.43	M	6114	Disposed	2019-06-02	Common Stock (6114)	Direct

Footnotes

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

F2: This option was previously reported as covering 5,975 shares at an exercise price of $53.43 per share, but was adjusted pursuant to the anti-dilution provisions of the award in connection with the spin-off of Bioverativ Inc. on February 1, 2017.

F3: Granted under one of the Issuer's stock option plans, in an exempt transaction under SEC Rule 16(b)-3(d).