BIOGEN INC. — Director's Dealing 2014

Apr 2, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2014-04-01

Reporting Person: PANGIA ROBERT W (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-04-01	Common Stock	M	6250	$47.55	Acquired	20253	Direct
2014-04-01	Common Stock	S	6250	$308.42	Disposed	14003	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2014-04-01	Stock Option (Right to Buy)	$47.55	M	6250	Disposed	2016-01-09	Common Stock (6250)	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: Granted under one of the Issuer's stock option plans, in an exempt transaction under SEC rule 16(b)-3(d).

F3: Immediately exercisable for all the option shares on grant date of 01/09/2006 subject to Issuer's repurchase rights which lapse on 01/09/2007.