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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
1013064	Roy P Vagelos	777 Old Saw Mill River Road Tarrytown NY 10591	Chairman Of The Board	Yes	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	Explanation
Common Stock	Disposition	2012-01-12	3,786	$0.00	167,761	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2012-03-30	1,852	$0.00	165,909	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2012-07-12	1,860	$0.00	164,049	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2012-10-09	1,392	$0.00	162,657	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2012-07-24	19,947	$0.00	59,844	No	5	G	Indirect	by GRAT
Common Stock	Disposition	2012-07-24	19,947	$0.00	39,897	No	5	G	Indirect	by GRAT
Common Stock	Disposition	2012-07-24	19,947	$0.00	19,950	No	5	G	Indirect	by GRAT
Common Stock	Disposition	2012-09-04	19,947	$0.00	3	No	5	G	Indirect	by GRAT
Common Stock	Disposition	2012-11-19	30,800	$160.59	129,200	No	4	S	Indirect	by Spouse as Trustee
Common Stock	Disposition	2012-11-19	1,700	$161.06	127,500	No	4	S	Indirect	by Spouse as Trustee

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	5	G	Indirect	by CLAT
No	5	G	Indirect	by CLAT
No	5	G	Indirect	by CLAT
No	5	G	Indirect	by CLAT
No	5	G	Indirect	by GRAT
No	5	G	Indirect	by GRAT
No	5	G	Indirect	by GRAT
No	5	G	Indirect	by GRAT
No	4	S	Indirect	by Spouse as Trustee
No	4	S	Indirect	by Spouse as Trustee

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	56,946	Direct
Common Stock	82,410	Indirect	by GRAT
Common Stock	2,329	Indirect	By 401(k) Plan
Common Stock	15,162	Indirect	by GRAT
Common Stock	1,203	Indirect	by trust for grandch

Footnotes

A GRAT of which the reporting person is a donor and trustee distributed to the adult children of the reporting person shares of Regeneron common stock in accordance with the terms of the GRAT.
Represents volume-weighted average price of sales of 30,800 shares of Company stock on November 19, 2012 at prices ranging from $160.63 to $160.99. 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 November 19, 2012 at each separate price.
By an irrevocable trust for the benefit of grandchildren of the reporting person, of which the spouse of the reporting person is trustee.
Represents volume-weighted average price of sales of 1,700 shares of Company stock on November 19, 2012 at prices ranging from $161.00 to $161.14. 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 November 19, 2012 at each separate price.
By a trust for the benefit of certain grandchildren of the reporting person, of which the reporting person and/or the spouse of the reporting person is trustee.