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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	2013-01-08	1,254	$0.00	161,403	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2013-04-04	1,215	$0.00	160,188	No	5	G	Indirect	by CLAT
Common Stock	Disposition	2013-05-06	12,750	$263.15	114,750	No	4	S	Indirect	by Spouse as Trustee
Common Stock	Disposition	2013-05-06	732	$264.19	114,018	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	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	2,352	Indirect	By 401(k) Plan
Common Stock	15,162	Indirect	by GRAT
Common Stock	3	Indirect	by GRAT
Common Stock	1,203	Indirect	by trust for grandch

Footnotes

Represents volume-weighted average price of sales of 12,018 shares of Company stock on May 6, 2013 at prices ranging from $263.00 to $263.97. 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 May 6, 2013 at each separate price.
Represents volume-weighted average price of sales of 732 shares of Company stock on May 6, 2013 at prices ranging from $264.12 to $264.59. 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 May 6, 2013 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.