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 clinical trials for the potential treatment of cancer, eye diseases, inflammatory diseases, and pain and has preclinical programs in other diseases and disorders.

Regeneron has therapeutic candidates in clinical trials for the potential treatment of cancer, eye diseases, and inflammatory diseases, and has preclinical programs in other diseases and disorders.

The Company's ability to develop product candidates is enhanced by the application of several proprietary technologies that Regeneron has incorporated into a comprehensive drug discovery and development process. This process is designed to thoroughly understand the biology of specific diseases, discover potential therapeutic candidates, and evaluate these candidates in clinical trials. One specific area of Regeneron expertise is the rapid development of fully-human monoclonal antibodies. In November 2007, Regeneron and sanofi-aventis entered into a global, strategic collaboration to discover, develop, and commercialize fully-human therapeutic antibodies utilizing Regeneron's proprietary VelociSuite of technologies.

In addition to the Company's corporate headquarters and research laboratories in Tarrytown, New York, Regeneron has a large-scale biologics manufacturing facility in Rensselaer, New York, where it produces commercial and investigational products for its clinical trials.