REGENERON PHARMACEUTICALS, INC. — Director's Dealing 2012

May 22, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENERON PHARMACEUTICALS INC (REGN)
CIK: 0000872589
Period of Report: 2012-05-21

Reporting Person: GOLDBERG MURRAY A (SVP Finance and Admin CFO Trea)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-21	Common Stock	M	4562.0	$21.92	Acquired	84728.0	Direct
2012-05-21	Common Stock	M	11682.0	$11.64	Acquired	96410.0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-21	Incentive Stock Option (right to buy)	$11.64	M	11682.0	Disposed	2015-12-19	Common Stock (11682.0)	Direct
2012-05-21	Incentive Stock Option (right to buy)	$21.92	M	4562.0	Disposed	2017-12-17	Common Stock (4562.0)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5560.0	Indirect

Footnotes

F1: The stock option award (combined incentive stock option and non-qualified stock option) 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.