REGENERON PHARMACEUTICALS, INC. — Director's Dealing 2010

Jun 3, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENERON PHARMACEUTICALS INC (REGN)
CIK: 0000872589
Period of Report: 2010-06-02

Reporting Person: BAKER CHARLES A (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-06-02	Common Stock	M	5000	$25.43	Acquired	5590	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-06-02	Non-Qualified Stock Option (right to buy)	$25.43	M	5000	Disposed	2010-06-09	Common Stock (5000)	Direct

Footnotes

F1: Exercisable date, exercise date, exercise price, purchase price, sales price, and/or expiration date is not applicable in this case.