Leonard S. Schleifer (born 1953) is an American businessman and is the co-founder and chief executive of the biotechnology company Regeneron Pharmaceuticals.

Leonard S. Schleifer, MD, PhD, has built and managed Regeneron since 1988 alongside his co-Founder George D. Yancopoulos. He is currently board co-Chair, president and chief executive officer of Regeneron. Len discusses his motivation for starting the company.

Leonard Schleifer cofounded drugmaker Regeneron in 1988, and remains CEO of the Tarrytown, New York-based company. Schleifer took Regeneron public in 1991; he owns 2% of the company's...

Leonard S. Schleifer, MD, PhD Board co-Chair, President and Chief Executive Officer

Leonard S. Schleifer, M.D., Ph.D. Founder, President, Chief Executive Officer and Board Co-Chair of Regeneron Len grew up in Queens, New York, in a middle-class family, with parents and teachers who inspired his passion for science and entrepreneurship.

Leonard S. Schleifer, MD, PhD, founded Regeneron in 1988, and has been a board member and the company’s president and chief executive officer since its inception.

Leonard Schleifer MD, PhD is the founder, president, CEO and board co-chair of Regeneron, a biotechnology company that repeatedly translates science into medicine.

May 4, 2021 · Dr. Leonard S. Schleifer started Regeneron in his New York City apartment in 1988, eight years after earning his Ph.D. in pharmacology from the University of Virginia, …

Nov 27, 2017 · Leonard S. Schleifer, MD, PhD, founded Regeneron Pharmaceuticals in 1988 while serving as an Assistant Professor of Neurology at Weill Cornell Medical College.

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