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: 2012-04-17

Reporting Person: BAKER CHARLES A (Director)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-04-17	Common Stock	M	2090.0	$18.8	Acquired	11680.0	Direct
2012-04-17	Common Stock	S	2090.0	$125.0	Disposed	9590.0	Direct
2012-04-19	Common Stock	M	12910.0	$18.8	Acquired	22500.0	Direct
2012-04-19	Common Stock	S	12910.0	$125.0	Disposed	9590.0	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-04-17	Non-Qualified Stock Option (right to buy)	$18.8	M	2090.0	Disposed	2013-01-02	Common Stock (2090.0)	Direct
2012-04-19	Non-Qualified Stock Option (right to buy)	$18.8	M	12910.0	Disposed	2013-01-02	Common Stock (12910.0)	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.