REGENERON PHARMACEUTICALS, INC. — Director's Dealing 2012

Nov 19, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENERON PHARMACEUTICALS INC (REGN)
CIK: 0000872589
Period of Report: 2012-11-16

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-10-25	Common Stock	G	75938	$0.00	Disposed	0	Indirect
2012-11-16	Common Stock	M	43757	$111.01	Acquired	338920	Direct
2012-11-16	Common Stock	F	32272	$150.51	Disposed	306648	Direct
2012-11-16	Common Stock	F	5290	$150.51	Disposed	301358	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-11-16	Non-Qualified Stock Option	$111.01	M	43757	Disposed	2012-12-20	Common Stock (43757)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5560	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Class A Stock	$0		Common Stock (1710790)	1710790	Direct
Class A Stock	$0		Common Stock (22275)	22275	Indirect

Footnotes

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

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

F3: Class A Stock of Regeneron Pharmaceuticals, Inc. ("Regeneron") converts to Common Stock of Regeneron on a one-to-one basis upon certain events.