BIOGEN INC. — Director's Dealing 2019

Feb 1, 2019

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2019-01-30

Reporting Person: DENNER ALEXANDER J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2019-01-30	Common Stock	P	30000	$324.8617	Acquired	491858	Indirect
2019-01-31	Common Stock	P	25800	$330.5191	Acquired	517658	Indirect
2019-02-01	Common Stock	P	7000	$328.4518	Acquired	524658	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	10909	Direct

Footnotes

F1: Dr. Denner disclaims beneficial ownership of the shares being reported on this Form 4 except to the extent of his pecuniary interest therein.

F2: Sarissa Capital Management GP LLC, a Delaware limited liability company ("Sarissa Capital GP"), is the general partner of Sarissa Capital Management LP, a Delaware limited partnership ("Sarissa Capital"), the investment advisor to certain investment funds. Alexander Denner is the Chief Investment Officer of Sarissa Capital and the managing member of Sarissa Capital GP. By virtue of the foregoing, Dr. Denner may be deemed to indirectly beneficially own (as that term is defined in Rule 13d-3 of the Securities Exchange Act of 1934, as amended) the shares that those funds directly beneficially own.