Schleifer Leonard S Form 4 REGENERON PHARMACEUTICALS / LEONARD S SCHLEIFER ownership change

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

SCHLEIFER LEONARD S

(Last) (First) (Middle)

777 OLD SAW MILL RIVER ROAD

(Street)

TARRYTOWN NY 10591

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
REGENERON PHARMACEUTICALS, INC. [ REGN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
President & CEO

3. Date of Earliest Transaction (Month/Day/Year)
08/06/2021

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/06/2021		M(1)		240,000	A	$52.03	573,321	D
Common Stock	08/06/2021		F(1)		137,145	D	$607.51	436,176	D
Common Stock	08/06/2021		M(1)		160,000	A	$52.03	596,176	D
Common Stock	08/06/2021		F(1)		91,430	D	$607.51	504,746	D
Common Stock	05/19/2021		G	V	41,178	A	$0.0	41,178	I	By Trust(2)
Common Stock	05/19/2021		G	V	41,178	D	$0.0	0	I	by 2019 GRAT
Common Stock								200,000	I	2021 GRAT
Common Stock								5,874	I	By 401(k) Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Non-Qualified Stock Option (right to buy)	$52.03	08/06/2021		M(1)			240,000	(3)	12/16/2021	Common Stock	240,000	$0.0	160,000	D
Non-Qualified Stock Option (right to buy)	$52.03	08/06/2021		M(1)			160,000	(3)	12/16/2021	Common Stock	160,000	$0.0	0	D

Explanation of Responses:

1. Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c).

2. These shares are held in a trust for the benefit of the reporting person's family members. The reporting person's spouse is a trustee of the trust.

3. With respect to 240,000 underlying shares (of which 0 remain outstanding), the option became exercisable on December 31, 2014, based upon the satisfaction by the company of certain performance criteria during the period ended December 31, 2014. With respect to 160,000 underlying shares (of which 0 remain outstanding), the stock option award vested in four equal annual installments, commencing one year after the date of grant.

	/s/**Leonard S. Schleifer	08/10/2021
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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