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: 2014-03-10

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-03-10	Common Stock	S	700	$327.76	Disposed	53689	Direct
2014-03-10	Common Stock	S	1200	$328.38	Disposed	52489	Direct
2014-03-10	Common Stock	S	500	$329.06	Disposed	51989	Direct
2014-03-10	Common Stock	S	900	$330.65	Disposed	51089	Direct
2014-03-10	Common Stock	S	2420	$331.55	Disposed	48669	Direct
2014-03-10	Common Stock	S	3280	$332.40	Disposed	45389	Direct
2014-03-10	Common Stock	S	2300	$333.61	Disposed	43089	Direct
2014-03-10	Common Stock	S	5673	$334.54	Disposed	37416	Direct
2014-03-10	Common Stock	S	3985	$335.25	Disposed	33431	Direct
2014-03-10	Common Stock	S	3001	$336.49	Disposed	30430	Direct
2014-03-10	Common Stock	S	2065	$337.25	Disposed	28365	Direct
2014-03-10	Common Stock	S	100	$338.05	Disposed	28265	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.

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 $327.66 (low) and $327.92 (high).

F4: This represents the weighted average price for shares sold at a range between $328.01 (low) and $328.77 (high).

F5: This represents the weighted average price for shares sold at a range between $329.02 (low) and $329.09 (high).

F6: This represents the weighted average price for shares sold at a range between $330.33 (low) and $330.87 (high).

F7: This represents the weighted average price for shares sold at a range between $331.02 (low) and $331.99 (high).

F8: This represents the weighted average price for shares sold at a range between $332.00 (low) and $332.93 (high).

F9: This represents the weighted average price for shares sold at a range between $333.03 (low) and $333.98 (high).

F10: This represents the weighted average price for shares sold at a range between $334.06 (low) and $334.97 (high).

F11: This represents the weighted average price for shares sold at a range between $335.00 (low) and $335.99 (high).

F12: This represents the weighted average price for shares sold at a range between $336.04 (low) and $336.81 (high).

F13: This represents the weighted average price for shares sold at a range between $337.00 (low) and $337.81 (high).