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Leonard S. Schleifer: Profile, Experience & Investments | Startup Intros

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LEONARD S. SCHLEIFER

Founder, President, and Chief Executive Officer at Regeneron Pharmaceuticals

ActiveFounder Investor

Updated: Apr 2, 2026 ·

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Role: Founder, President, and Chief Executive Officer
Company: Regeneron Pharmaceuticals
Status: Active
Type: Founder, Investor

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Experience

Founder, President, and Chief Executive OfficerFounderCurrent

Regeneron Pharmaceuticals

Present - Present

Frequently Asked Questions

Who is Leonard S. Schleifer?

Leonard S. Schleifer is Founder, President, and Chief Executive Officer at Regeneron Pharmaceuticals.

What companies has Leonard S. Schleifer founded?

Leonard S. Schleifer co-founded Regeneron Pharmaceuticals.