Statement of Changes in Beneficial Ownership (4)

FORM 4

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

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

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3235-0287

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

1. Name and Address of Reporting Person * Van Plew Daniel P	2. Issuer Name and Ticker or Trading Symbol REGENERON PHARMACEUTICALS, INC. [ REGN ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) EVP & General Mgr Industrial O
(Last)          (First)          (Middle) 777 OLD SAW MILL RIVER ROAD	3. Date of Earliest Transaction (MM/DD/YYYY) 2/25/2020
(Street) TARRYTOWN, NY 10591 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	2/25/2020		M		32735	A	$30.63	60986	D
Common Stock	2/25/2020		F		17093	D	$447.3	43893	D
Common Stock	2/26/2020		S		200	D	$451.61 (1)	43693	D
Common Stock	2/26/2020		S		300	D	$452.53 (2)	43393	D
Common Stock	2/26/2020		S		1000	D	$453.57 (3)	42393	D
Common Stock	2/26/2020		S		711	D	$454.53 (4)	41682	D
Common Stock	2/26/2020		S		1300	D	$455.5 (5)	40382	D
Common Stock	2/26/2020		S		1435	D	$456.5 (6)	38947	D
Common Stock	2/26/2020		S		3787	D	$457.59 (7)	35160	D
Common Stock	2/26/2020		S		5274	D	$458.45 (8)	29886	D
Common Stock	2/26/2020		S		1425	D	$459.33 (9)	28461	D
Common Stock	2/26/2020		S		210	D	$460.3 (10)	28251	D
Common Stock								1537	I	By 401(k) Plan

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: 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)	$30.63	2/25/2020		M			32735	(11)	12/14/2020	Common Stock	32735	$0.0	0	D

Explanation of Responses:
(1)	Represents volume-weighted average price of sales of 200 shares of Company stock on February 26, 2020 at prices ranging from $451.51 to $451.71. 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 February 26, 2020 at each separate price.
(2)	Represents volume-weighted average price of sales of 300 shares of Company stock on February 26, 2020 at prices ranging from $452.25 to $452.76. 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 February 26, 2020 at each separate price.
(3)	Represents volume-weighted average price of sales of 1,000 shares of Company stock on February 26, 2020 at prices ranging from $453.06 to $453.91. 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 February 26, 2020 at each separate price.
(4)	Represents volume-weighted average price of sales of 711 shares of Company stock on February 26, 2020 at prices ranging from $454.02 to $454.97. 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 February 26, 2020 at each separate price.
(5)	Represents volume-weighted average price of sales of 1,300 shares of Company stock on February 26, 2020 at prices ranging from $455.01 to $455.97. 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 February 26, 2020 at each separate price.
(6)	Represents volume-weighted average price of sales of 1,435 shares of Company stock on February 26, 2020 at prices ranging from $456.00 to $456.93. 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 February 26, 2020 at each separate price.
(7)	Represents volume-weighted average price of sales of 3,787 shares of Company stock on February 26, 2020 at prices ranging from $457.00 to $457.99. 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 February 26, 2020 at each separate price.
(8)	Represents volume-weighted average price of sales of 5,274 shares of Company stock on February 26, 2020 at prices ranging from $458.00 to $458.98. 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 February 26, 2020 at each separate price.
(9)	Represents volume-weighted average price of sales of 1,425 shares of Company stock on February 26, 2020 at prices ranging from $459.02 to $459.89. 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 February 26, 2020 at each separate price.
(10)	Represents volume-weighted average price of sales of 210 shares of Company stock on February 26, 2020 at prices ranging from $460.00 to $460.60. 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 February 26, 2020 at each separate price.
(11)	The option became exercisable with respect to all shares underlying the option on December 31, 2013, based upon the satisfaction by the company of certain performance criteria during the period ended December 31, 2013.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Van Plew Daniel P 777 OLD SAW MILL RIVER ROAD TARRYTOWN, NY 10591			EVP & General Mgr Industrial O

Signatures
/s/**Daniel P. Van Plew		2/27/2020
**Signature of Reporting Person		Date