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Insider Ownership

Insider Trading & Ownership of LEONARD S. SCHLEIFER

Location: Tarrytown, NY
Summary: The estimated net worth of LEONARD S. SCHLEIFER is at least $493,538,603 dollars as of 05 Jan 2026. LEONARD S. SCHLEIFER is the Bd. Co-Chair, President & CEO, Director of REGENERON PHARMACEUTICALS, INC. and owns shares of REGENERON PHARMACEUTICALS, INC. (REGN) stock worth about $493.54M.
Signature: /s/ Leonard S. Schleifer
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Ownership of LEONARD S. SCHLEIFER

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
REGN	REGENERON PHARMACEUTICALS, INC.	Bd. Co-Chair, President & CEO, Director	$493,538,603			31 Dec 2025

Insider Transactions Reported by LEONARD S. SCHLEIFER:

Sym	Company	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.