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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
1226689	Neil Stahl	777 Old Saw Mill River Road Tarrytown NY 10591	Svp Research And Development S	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	2012-08-28	40,000	$21.92	99,121	No	4	M	Direct
Common Stock	Disposition	2012-08-28	6,017	$145.70	93,104	No	4	F	Direct
Common Stock	Disposition	2012-08-28	17,099	$145.70	76,005	No	4	F	Direct
Common Stock	Disposition	2012-08-29	1,500	$144.92	74,505	No	4	S	Direct
Common Stock	Disposition	2012-08-29	9,386	$145.44	65,119	No	4	S	Direct
Common Stock	Disposition	2012-08-29	5,998	$146.41	59,121	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	F	Direct
No	4	F	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	Non-Qualified Stock Option (right to buy)	Disposition	2012-08-28	40,000	$0.00	40,000	$21.92
Common Stock	Non-Qualified Stock Option (right to buy)	Acquisiton	2012-08-28	6,017	$0.00	6,017	$145.70

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
55,438		2017-12-17	No	4	M	Direct
6,017	2013-02-28	2017-12-17	No	4	A	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	5,479	Indirect	By 401(k) Plan

Footnotes

Represents volume-weighted average price of sales of 1,500 shares of Company stock on August 29, 2012 at prices ranging from $144.82 to $144.99. 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 August 29, 2012 at each separate price.
Represents volume-weighted average price of sales of 9,386 shares of Company stock on August 29, 2012 at prices ranging from $145.04 to $145.99. 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 August 29, 2012 at each separate price.
Represents volume-weighted average price of sales of 5,998 shares of Company stock on August 29, 2012 at prices ranging from $146.01 to $146.93. 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 August 29, 2012 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/are not applicable in this case.