BIOGEN INC. — Director's Dealing 2011

Jun 14, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2011-06-14

Reporting Person: LEAMING NANCY (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-06-14	Common Stock	S	2300	$92.6181	Disposed	9420	Direct

Footnotes

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

F2: This represents the weighted average price for shares sold at a range between $92.1018 (low) and $92.755 (high).

F3: Full information regarding the number of shares sold at each separate price will be provided upon request by the SEC staff, the issuer, or a security holder of the issuer.