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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
872589	Regeneron Pharmaceuticals Inc	REGN	Pharmaceutical Preparations (2834)	133444607

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1225474	L Joseph Goldstein	777 Old Saw Mill River Road Tarrytown NY 10591		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	2011-02-10	5,000	$15.80	5,000	No	4	M	Direct
Common Stock	Disposition	2011-02-10	2,239	$35.27	2,761	No	4	F	Direct
Common Stock	Disposition	2011-02-11	2,761	$36.66	0	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2011-02-10	5,000	$0.00	5,000	$15.80

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2016-01-03	No	4	M	Direct

Footnotes

Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c).
The reporting person sold 2,761 shares of Company stock on February 11, 2011 at prices ranging from $36.56 to $36.84. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 11, 2011 at each separate price.
The stock option becomes exercisable in three equal annual installments, commencing one year after the date of grant
Exercisable date, exercise date, exercise price, purchase price, sales price, and/or expiration date is not applicable in this case.