SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Sandrock Alfred (Last) (First) (Middle) BIOGEN IDEC INC. 133 BOSTON POST RD. (Street) WESTON MA 02493 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 06/03/2013	3. Issuer Name and Ticker or Trading Symbol BIOGEN IDEC INC. [ BIIB ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Grp SVP, Chief Medical Officer	5. If Amendment, Date of Original Filed (Month/Day/Year) 06/10/2013
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	02/12/2018(2)	Common Stock	15,030	60.56	D
Stock Option (Right to Buy)	(3)	02/23/2019(2)	Common Stock	9,820	49.65	D

Explanation of Responses:

1. The stock options became exercisable in four (4) equal annual installments commencing one year after the grant date of 02/12/08.

2. This amendment is being filed for the sole purpose of correcting the expiration date, which was incorrectly stated on the original Form 3.

3. The stock options became exercisable in four (4) equal annual installments commencing one year after the grant date of 02/24/09.

	Matthew S. Gilman, Attorney in Fact for Alfred W. Sandrock, Jr.	06/24/2013
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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