BIOGEN INC. — Director's Dealing 2016

Jul 7, 2016

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: BIOGEN INC. (BIIB)
CIK: 0000875045
Period of Report: 2016-07-01

Reporting Person: McKenzie Paul (EVP Pharmaceutical Oper & Tech)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	210.329	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Restricted Stock Unit	$0	2019-03-01	Common Stock (2480)		Direct

Footnotes

F1: The number of RSUs reported represents the maximum possible number of shares that are eligible for vesting, which is 200% of the number of shares at target payout. One-third of these RSUs are eligible to vest on each of the first three anniversaries of the grant date. The actual number of shares that will vest on each vesting date will be determined by comparing the price of Biogen common stock on such vesting date to the price on the grant date (i.e., number of vested shares = number of shares at target payout times [the 30-day average closing stock price ending on the vesting date divided by the 30-day average closing stock price on the grant date]).