BIOGEN INC. — Director's Dealing 2013

Sep 13, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2013-09-11

Reporting Person: SCHENK LYNN (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-09-11	Common Stock	S	900	$235.251	Disposed	3325	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	7100	Indirect

Footnotes

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

F2: This represents the weighted average price of shares sold at a range between $235.21 (low) and $235.32 (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.