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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
1226687	William Roberts	777 Old Saw Mill River Road Tarrytown NY 10591	Vp Regul Devel & Med Safety	No	Yes	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	2010-02-02	5,000	$13.00	71,956	No	4	M	Direct
Common Stock	Disposition	2010-02-02	5,000	$27.48	66,956	No	4	S	Direct
Common Stock	Acquisiton	2010-02-02	7,000	$13.00	73,956	No	4	M	Direct
Common Stock	Disposition	2010-02-02	3,350	$27.16	70,606	No	4	F	Direct
Common Stock	Disposition	2010-02-02	1,321	$27.16	69,285	No	4	F	Direct
Common Stock	Acquisiton	2010-02-03	1,500	$13.00	70,785	No	4	M	Direct
Common Stock	Disposition	2010-02-03	695	$28.02	70,090	No	4	F	Direct
Common Stock	Disposition	2010-02-03	291	$28.02	69,799	No	4	F	Direct
Common Stock	Disposition	2010-02-03	194	$28.08	69,605	No	4	S	Direct
Common Stock	Disposition	2010-02-03	2,135	$27.66	67,470	No	4	S	Direct
Common Stock	Disposition	2010-02-04	43	$28.38	67,427	No	4	S	Direct
Common Stock	Disposition	2010-02-04	471	$27.48	66,956	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	F	Direct
No	4	F	Direct
No	4	M	Direct
No	4	F	Direct
No	4	F	Direct
No	4	S	Direct
No	4	S	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	Incentive Stock Option (right to buy)	Disposition	2010-02-02	5,000	$0.00	5,000	$13.00
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2010-02-02	7,000	$0.00	7,000	$13.00
Common Stock	Non-Qualified Stock Option (right to buy)	Disposition	2010-02-03	1,500	$0.00	1,500	$13.00

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2013-12-15	No	4	M	Direct
1,500	2013-12-15	No	4	M	Direct
0	2013-12-15	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	1,200	Indirect	by trust for daught
Common Stock	3,492	Indirect	By 401(k) Plan
Common Stock	8,106	Indirect	by Spouse
Common Stock	1,200	Indirect	by trust for daught

Footnotes

Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c).
The reporting person sold 2,135 shares of Company stock on February 3, 2010 at prices ranging from $27.41 to $27.98. Upon request by the Commission staff, the Company, or a security holder of the Company, we will provide full information regarding the number of shares sold by the reporting person on February 3, 2010 at each separate price.
The stock option award (combined incentive stock option and non-qualified stock option) vests in four 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.