$REGN

Leonard S. Schleifer

Regeneron Pharmaceuticals

Co-founder, President & CEO • Since 1988 • Health Care

Also profiled in: Nasdaq-100

📊 CEO Reputation Score

FY2025 vs FY2024 · Source: SEC EDGAR filings

45/100

Blend of this company's year-over-year free-cash-flow and profit improvement, each ranked as a percentile against every scored company in the three indexes.

Free cash flow: $3.7B → $4.1B (+11.3% YoY) — fiscal 2025 vs fiscal 2024
Profit (net income): $4.4B → $4.5B (+2.1% YoY) — fiscal 2025 vs fiscal 2024

How this score works · S&P 500 reputation leaderboard

Overview

Leonard S. Schleifer is the co-founder, president & ceo of Regeneron Pharmaceuticals since 1988. Regeneron Pharmaceuticals is a Health Care company headquartered in Tarrytown, New York, founded in 1988, and one of the 500 companies in the S&P 500 — every one of which is profiled on this site.

Leadership

Leonard holds the chief executive role at Regeneron Pharmaceuticals with the title Co-founder, President & CEO — in post since 1988. This page is the concise leadership record for Regeneron Pharmaceuticals in the S&P 500 CEO index; the site's fully researched long-form profiles (career timelines, education, achievements, setbacks, philosophy and sourced quotes) currently cover the index's ten largest companies, and this entry will be expanded in the same format. Leonard S. Schleifer is a founder of the company — a distinction shared by only a minority of the chief executives in this index.

At a Glance

Sector: Health Care
Ticker: $REGN
Headquarters: Tarrytown, New York
Founded: 1988
CEO since: 1988
Index: S&P 500 (#386 of 500)