BIOGEN INC. — Director's Dealing 2014

May 2, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2014-05-01

Reporting Person: SCANGOS GEORGE A (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-05-01	Common Stock	S	486	$285.87	Disposed	25656	Direct
2014-05-01	Common Stock	S	642	$285.43	Disposed	25014	Direct
2014-05-01	Common Stock	S	995	$285.49	Disposed	24019	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5378	Indirect
Common Stock	5378	Indirect

Footnotes

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