Regeneron Pharmaceuticals

Dr. Leonard S. Schleifer, M.D., Ph.D. (born 1953) is an American neurologist, scientist, and entrepreneur who co-founded Regeneron Pharmaceuticals, a leading biotechnology company focused on the discovery, development, and commercialization of innovative medicines. As the President and CEO of Regeneron, Schleifer has played a critical role in the company's growth and its development of groundbreaking therapies for various diseases.