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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
872589	Regeneron Pharmaceuticals Inc.	REGN	Pharmaceutical Preparations (2834)	133444607

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1218629	S Leonard Schleifer	777 Old Saw Mill River Road Tarrytown NY 10591	Bd. Co-Chair, President & Ceo	Yes	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2024-05-17	22,687	$979.22	467,020	No	4	S	Direct
Common Stock	Disposition	2024-05-17	143	$980.07	466,877	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	157,552	Indirect	2023 GRAT
Common Stock	5,932	Indirect	By 401(k) Plan
Common Stock	64,985	Indirect	By Trust

Footnotes

Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 5, 2024.
Represents volume-weighted average price of sales of 22,687 shares of Company stock on May 17, 2024 at prices ranging from $979.00 to $979.97. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on May 17, 2024 at each separate price.
Represents volume-weighted average price of sales of 143 shares of Company stock on May 17, 2024 at prices ranging from $980.01 to $980.20. Upon request by the Commission staff, the Company, or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold by the reporting person on May 17, 2024 at each separate price.