UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K/A
CURRENT REPORT

Pursuant to Section 13 or 15(d) of the
Securities Exchange Act of 1934


Date of Report (Date of earliest event reported): January 24, 2012 (January 20, 2012)


REGENERON PHARMACEUTICALS, INC.
(Exact Name of Registrant as Specified in Charter)


New York        000-19034        13-3444607
(State or other jurisdiction of (Commission File No.) (IRS Employer Identification No.)
Incorporation)  

777 Old Saw Mill River Road, Tarrytown, New York 10591-6707
(Address of principal executive offices, including zip code)

(914) 347-7000
(Registrant's telephone number, including area code)


Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
 
o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
 
o Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
     
o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))



EXPLANATORY NOTE

This Current Report on Form 8-K/A is being filed to amend the Current Report on Form 8-K filed by Regeneron Pharmaceuticals, Inc. (“Regeneron”) on November 22, 2011 (the “Original Report”). On November 18, 2011, the Board of Directors of Regeneron (the “Board”) elected Marc Tessier-Lavigne, Ph.D. as a director of Regeneron. This election was reported in the Original Report. At the time of the filing of the Original Report, board committee appointments for Dr. Tessier-Lavigne had not yet been determined. The sole purpose of this report is to disclose this information that was not determined at that time.

Item 5.02    Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

     On January 20, 2012, the Board appointed Marc Tessier-Lavigne, Ph.D to the Compensation Committee and the Technology Committee.



SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: January 24, 2012 REGENERON PHARMACEUTICALS, INC.
 
 
By:   /s/ Joseph J. LaRosa  
Name: Joseph J. LaRosa
Title: Senior Vice President, General Counsel and
Secretary