BIOGEN INC. — Director's Dealing 2018

Jun 14, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2018-06-12

Reporting Person: DENNER ALEXANDER J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-06-12	Common Stock	A	880	—	Acquired	10909	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	461858	Indirect

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: These shares are directly beneficially owned (as that term is defined in Rule 13d-3 of the Securities Exchange Act of 1934, as amended) by funds (the "Sarissa Funds") managed by Sarissa Capital Management LP, a Delaware limited lpartnership ("Sarissa Capital"). Sarissa Capital Management GP LLC, a Delaware limited liability company ("Sarissa Capital GP"), is the general partner of Sarissa Capital, the investment advisor to the Sarissa 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 the Sarissa Funds directly beneficially own.