BIOGEN INC. — Director's Dealing 2011

Aug 3, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2011-08-01

Reporting Person: ALEXANDER SUSAN H (EVP, General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-01	Common Stock	F	835	$102.90	Disposed	18130	Direct
2011-08-02	Common Stock	S	1165	$102.04	Disposed	16965	Direct

Footnotes

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