BIOGEN INC. — Director's Dealing 2014

Mar 12, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOGEN IDEC INC. (BIIB)
CIK: 0000875045
Period of Report: 2014-03-11

Reporting Person: Kingsley Stuart A (EVP, Global Comm. Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-03-11	Common Stock	S	2885	$336.338	Disposed	9054	Direct
2014-03-11	Common Stock	S	2000	$337.735	Disposed	7054	Direct
2014-03-11	Common Stock	S	963	$337.207	Disposed	6091	Direct
2014-03-11	Common Stock	S	1393	$336.305	Disposed	4698	Direct
2014-03-11	Common Stock	S	1187	$336.78	Disposed	3511	Direct

Footnotes

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

F2: 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.

F3: This represents the weighted average price for shares sold at a range between $335.95 (low) and 336.74 (high).

F4: This represents the weighted average price for shares sold at a range between $337.50 (low) and 338.13 (high).

F5: This represents the weighted average price for shares sold at a range between $337.02 (low) and 337.33 (high).

F6: This represents the weighted average price for shares sold at a range between $335.94 (low) and 336.49 (high).

F7: This represents the weighted average price for shares sold at a range between $336.66 (low) and 336.80 (high).