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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
875045	Biogen Idec Inc.	BIIB	Biological Products, (No Disgnostic Substances) (2836)	330112644

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1236188	W Robert Pangia	Biogen Idec Inc. 225 Binney Street Cambridge MA 02142		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2015-03-10	3,125	$46.99	17,998	No	4	M	Direct
Common Stock	Disposition	2015-03-10	200	$410.61	17,798	No	4	S	Direct
Common Stock	Disposition	2015-03-10	300	$411.46	17,498	No	4	S	Direct
Common Stock	Disposition	2015-03-10	700	$412.97	16,798	No	4	S	Direct
Common Stock	Disposition	2015-03-10	1,000	$413.99	15,798	No	4	S	Direct
Common Stock	Disposition	2015-03-10	300	$415.14	15,498	No	4	S	Direct
Common Stock	Disposition	2015-03-10	525	$416.25	14,973	No	4	S	Direct
Common Stock	Disposition	2015-03-10	100	$417.27	14,873	No	4	S	Direct
Common Stock	Acquisiton	2015-03-10	500	$52.22	15,373	No	4	M	Direct
Common Stock	Disposition	2015-03-10	400	$410.06	14,973	No	4	S	Direct
Common Stock	Disposition	2015-03-10	100	$411.33	14,873	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2015-03-10	3,125	$0.00	3,125	$46.99
Common Stock	Stock Option (Right to Buy)	Disposition	2015-03-10	500	$0.00	500	$52.22

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2016-05-24	No	4	M	Direct
5,450		2017-05-30	No	4	M	Direct

Footnotes

Exercise/sale pursuant to a trading plan intended to comply with Rule 10b5-1 of the Securities Exchange Act of 1934.
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.
This represents the weighted average price for shares sold at a range between $410.18 (low) and $411.03 (high)
This represents the weighted average price for shares sold at a range between $411.35 (low) and $411.53 (high).
This represents the weighted average price for shares sold at a range between $412.47 (low) and $413.18 (high).
This represents the weighted average price for shares sold at a range between $413.62 (low) and $414.28 (high).
This represents the weighted average price for shares sold at a range between $414.82 (low) and $415.71 (high).
This represents the weighted average price for shares sold at a range between $415.90 (low) and $416.54 (high).
This represents the weighted average price for shares sold at a range between $409.67 (low) and $410.35 (high).
Granted under one of the Issuer's stock option plans, in an exempt transaction under SEC rule 16(b)-3(d).
Options will vest in their entirety on 05/25/2007 provided that the Reporting Owner is then a member of the Issuer's Board of Directors.
Options will become 100% exercisable upon completion of one year of service with Biogen Idec Inc.