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: 2012-02-14

Reporting Person: SCHLEIFER LEONARD S (Director, President & CEO)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-14	Common Stock	M	234616	$13	Acquired	390679	Direct
2012-02-14	Common Stock	F	27475	$111.01	Disposed	363204	Direct
2012-02-14	Common Stock	F	95429	$111.01	Disposed	267775	Direct
2012-02-14	Common Stock	M	250000	$19.43	Acquired	517775	Direct
2012-02-14	Common Stock	F	43757	$111.01	Disposed	474018	Direct
2012-02-14	Common Stock	F	95016	$111.01	Disposed	379002	Direct
2012-02-14	Common Stock	M	15384	$13	Acquired	394386	Direct
2012-02-14	Common Stock	F	1801	$111.01	Disposed	392585	Direct
2012-02-15	Common Stock	F	6257	$111.01	Disposed	386328	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-14	Non-Qualified Stock Option (right to buy)	$13	M	234616	Disposed	2013-12-15	Common Stock (234616)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$13	M	15384	Disposed	2013-12-15	Common Stock (15384)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$19.43	M	250000	Disposed	2012-12-20	Common Stock (250000)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$111.01	A	43757	Acquired	2012-12-20	Common Stock (43757)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$111.01	A	1801	Acquired	2013-12-15	Common Stock (1801)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$111.01	A	27475	Acquired	2013-12-15	Common Stock (27475)	Direct

Security	Shares	Ownership
Common Stock	84773	Indirect
Common Stock	5416	Indirect

F1: The stock option award vests in four equal annual installments, commencing one year after the date of grant.

F2: Exercisable date, exercise date, exercise price, purchase price, sales price, and/or expiration date is/are not applicable in this case.