Regeneron to Webcast Investor Day on July 15, 2010

TARRYTOWN, N.Y.,July 13/PRNewswire-FirstCall/ -- Regeneron Pharmaceuticals, Inc. (Nasdaq:REGN) today announced that its Investor Day inNew York City, to be held onThursday, July 15, 2010, will be webcast live on the Company's website,www.regeneron.com, on the Investor Relations home page.  The presentations will begin at9:00 a.m. Eastern Time.

Regeneron senior management will review the Company's clinical pipeline, antibody technology platforms, collaborations with the sanofi-aventis Group and Bayer HealthCare, financial condition and other topics.  Following the broadcast, the webcast will be archived on the Presentations page of the Investor Relations section ofwww.regeneron.com.

Regeneron is a fully integrated biopharmaceutical company that discovers, develops, and commercializes medicines for the treatment of serious medical conditions.  In addition to ARCALYST® (rilonacept) Injection for Subcutaneous Use, its first commercialized product, Regeneron has therapeutic candidates in Phase 3 clinical trials for the potential treatment of gout, diseases of the eye (wet age-related macular degeneration and central retinal vein occlusion), and certain cancers.  Additional therapeutic candidates are in earlier stage development programs in rheumatoid arthritis and other inflammatory conditions, pain, cholesterol reduction, allergic and immune conditions and cancer.  Additional information about Regeneron and recent news releases are available on the Regeneron web site atwww.regeneron.com.

This news release includes forward-looking statements about Regeneron and its products, development programs, finances, and business, all of which involve a number of risks and uncertainties.  These include, among others, risks and timing associated with preclinical and clinical development of our drug candidates, determinations by regulatory and administrative governmental authorities which may delay or restrict our ability to continue to develop or commercialize our product and drug candidates, competing drugs that are superior to our product and drug candidates, uncertainty of market acceptance of our product and drug candidates, unanticipated expenses, the availability and cost of capital, the costs of developing, producing, and selling products, the potential for any collaboration agreement, including our agreements with the sanofi-aventis Group and Bayer HealthCare, to be canceled or terminated without any product success, and risks associated with third party intellectual property.  A more complete description of these and other material risks can be found in our filings with the United States Securities and Exchange Commission (SEC), including its Form 10-K for the year endedDecember 31, 2009and Form 10-Q for the quarter endedMarch 31, 2010.  Regeneron does not undertake any obligation to update publicly any forward-looking statement, whether as a result of new information, future events, or otherwise, unless required by law.