BIOGEN INC. — Director's Dealing 2013

Dec 5, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2013-12-03

Reporting Person: Sandrock Alfred (Grp SVP, Chief Medical Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-12-03	Common Stock	F	394	$287.76	Disposed	14106	Direct
2013-12-04	Common Stock	S	439	$285.90	Disposed	13667	Direct

Footnotes

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