REGENERON PHARMACEUTICALS, INC. - Director's Dealing 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENERON PHARMACEUTICALS INC (REGN)
CIK: 0000872589
Period of Report: 2012-09-05

Reporting Person: BAKER CHARLES A (Director)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-05	Common Stock	M	1286.0	$15.01	Acquired	10876.0	Direct
2012-09-05	Common Stock	S	1286.0	$150.0	Disposed	9590.0	Direct
2012-09-06	Common Stock	M	13714.0	$15.01	Acquired	23304.0	Direct
2012-09-06	Common Stock	S	13714.0	$150.0	Disposed	9590.0	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-09-05	Non-Qualified Stock Option (right to buy)	$15.01	M	1286.0	Disposed	2014-01-02	Common Stock (1286.0)	Direct
2012-09-06	Non-Qualified Stock Option (right to buy)	$15.01	M	13714.0	Disposed	2014-01-02	Common Stock (13714.0)	Direct

F1: Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c).

F2: The stock option becomes exercisable in three equal annual installments, commencing one year after the date of grant

F3: Exercisable date, exercise date, exercise price, purchase price, sales price, and/or expiration date is/are not applicable in this case.