REGENERON PHARMACEUTICALS, INC. — Director's Dealing 2012

Feb 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: REGENERON PHARMACEUTICALS INC (REGN)
CIK: 0000872589
Period of Report: 2012-02-13

Reporting Person: STAHL NEIL (SVP Research and Development S)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-13	Common Stock	M	63234	$8.5	Acquired	122355	Direct
2012-02-13	Common Stock	F	4741	$113.35	Disposed	117614	Direct
2012-02-13	Common Stock	F	28869	$113.35	Disposed	88745	Direct
2012-02-13	Common Stock	M	3432	$8.5	Acquired	92177	Direct
2012-02-13	Common Stock	F	257	$113.35	Disposed	91920	Direct
2012-02-13	Common Stock	F	1597	$113.35	Disposed	90323	Direct
2012-02-14	Common Stock	M	50000	$16.8	Acquired	140323	Direct
2012-02-14	Common Stock	F	7566	$111.01	Disposed	132757	Direct
2012-02-14	Common Stock	F	21352	$111.01	Disposed	111405	Direct
2012-02-14	Common Stock	S	333	$107.83	Disposed	111072	Direct
2012-02-14	Common Stock	S	2350	$108.6	Disposed	108722	Direct
2012-02-14	Common Stock	S	8510	$109.61	Disposed	100212	Direct
2012-02-14	Common Stock	S	17694	$110.35	Disposed	82518	Direct
2012-02-14	Common Stock	S	600	$111.91	Disposed	81918	Direct
2012-02-14	Common Stock	S	1115	$112.1	Disposed	80803	Direct
2012-02-14	Common Stock	S	600	$113.47	Disposed	80203	Direct
2012-02-15	Common Stock	S	19057	$107.79	Disposed	61146	Direct
2012-02-15	Common Stock	S	2025	$108.09	Disposed	59121	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-13	Non-Qualified Stock Option (right to buy)	$8.5	M	63234	Disposed	2012-12-20	Common Stock (63234)	Direct
2012-02-13	Non-Qualified Stock Option (right to buy)	$8.5	M	3432	Disposed	2012-12-20	Common Stock (3432)	Direct
2012-02-14	Non-Qualified Stock Option (right to buy)	$16.8	M	50000	Disposed	2018-12-17	Common Stock (50000)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5335	Indirect

Footnotes

F1: Represents volume-weighted average price of sales of 333 shares of Company stock on February 14, 2012 at prices ranging from $107.62 to $107.96.. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F2: Represents volume-weighted average price of sales of 2,350 shares of Company stock on February 14, 2012 at prices ranging from $108.03 to $108.99. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F3: Represents volume-weighted average price of sales of 8,510 shares of Company stock on February 14, 2012 at prices ranging from $109.02 to $109.98.. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F4: Represents volume-weighted average price of sales of 17,694 shares of Company stock on February 14, 2012 at prices ranging from $110.00 to $110.77. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F5: Represents volume-weighted average price of sales of 600 shares of Company stock on February 14, 2012 at prices ranging from $111.79 to $111.98. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F6: Represents volume-weighted average price of sales of 1,115 shares of Company stock on February 14, 2012 at prices ranging from $112.00 to $112.17. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F7: Represents volume-weighted average price of sales of 600 shares of Company stock on February 14, 2012 at prices ranging from $113.25 to $113.47. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 14, 2012 at each separate price.

F8: Represents volume-weighted average price of sales of 19,057 shares of Company stock on February 15, 2012 at prices ranging from $107.60 to $107.98 . Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 15, 2012 at each separate price.

F9: Represents volume-weighted average price of sales of 2,025 shares of Company stock on February 15, 2012 at prices ranging from $108.00 to $108.09 . Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on February 15, 2012 at each separate price.

F10: The option became exercisable with respect to all shares underlying the option upon the satisfaction by the company of certain performance criteria on February 10, 2012.

F11: Exercisable date, exercise date, exercise price, purchase price, sales price, and/or expiration date is/are not applicable in this case.

F12: The option became exercisable with respect to all shares underlying the option on December 31, 2011, based upon the satisfaction by the company of certain performance criteria during the period ended December 31, 2011.