Regeneron to Report Fourth Quarter and Full Year 2013 Financial and Operating Results and Host Conference Call and Webcast on February 11, 2014

TARRYTOWN, N.Y.,Jan. 21, 2014/PRNewswire/ -- Regeneron Pharmaceuticals, Inc. (NASDAQ:REGN)today announced that it will report its fourth quarter and full year 2013 financial and operating results onTuesday, February 11, 2014, before the U.S. financial markets open.  The Company will host a conference call and simultaneous webcast at8:30 AM Eastern Timethat day.

Conference Call InformationTo access this call, dial (888) 660-6127 (U.S.) or (973) 890-8355 (International).  A link to the webcast may be accessed from the 'Events and Presentations' page of Regeneron's website atwww.regeneron.com.  A replay of the conference call and webcast will be archived on the Company's website and will be available for 30 days.

About Regeneron Pharmaceuticals, Inc.Regeneron is a leading science-based biopharmaceutical company based inTarrytown, New Yorkthat discovers, invents, develops, manufactures, and commercializes medicines for the treatment of serious medical conditions.  Regeneron markets medicines for eye diseases, colorectal cancer, and a rare inflammatory condition and has product candidates in development in other areas of high unmet medical need, including hypercholesterolemia, oncology, rheumatoid arthritis, asthma and atopic dermatitis.  For additional information about the company, please visitwww.regeneron.com.

Manisha Narasimhan, Ph.D.

Peter Dworkin

Investor Relations

Corporate Communications

914-847-5126

914-847-7640

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