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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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 *

Landry Robert E
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 Finance CFO
(Last)          (First)          (Middle)

777 OLD SAW MILL RIVER ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)

4/1/2020
(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 4/1/2020  S(1)  23 D$478.97 24950 D  
Common Stock 4/1/2020  S(1)  75 D$479.5 (2)24875 D  
Common Stock 4/1/2020  S(1)  87 D$481.91 (3)24788 D  
Common Stock 4/1/2020  S(1)  1 D$484.14 24787 D  
Common Stock 4/1/2020  S(1)  23 D$486.27 24764 D  
Common Stock 4/1/2020  S(1)  23 D$488.77 24741 D  
Common Stock 4/1/2020  S(1)  61 D$489.46 (4)24680 D  
Common Stock 4/1/2020  S(1)  87 D$490.7 (5)24593 D  
Common Stock 4/1/2020  S(1)  64 D$492.61 (6)24529 D  
Common Stock 4/1/2020  S(1)  156 D$493.08 (7)24373 D  
Common Stock 4/1/2020  M(1)  2500 A$272.7 26873 D  
Common Stock 4/1/2020  F  1936 D$488.22 24937 D  
Common Stock 4/1/2020  M(1)  2000 A$272.7 26937 D  
Common Stock 4/1/2020  F(1)  1549 D$488.22 25388 D  
Common Stock 4/1/2020  M(1)  1500 A$272.7 26888 D  
Common Stock 4/1/2020  F(1)  1162 D$488.2 25726 D  
Common Stock 4/2/2020  M(1)  3000 A$272.7 28726 D  
Common Stock 4/2/2020  F(1)  2317 D$492.05 26409 D  
Common Stock 4/2/2020  S(1)  139 D$483.51 (8)26270 D  
Common Stock 4/2/2020  S(1)  22 D$484.96 26248 D  
Common Stock 4/2/2020  S(1)  62 D$485.63 (9)26186 D  
Common Stock 4/2/2020  S(1)  78 D$486.66 (10)26108 D  
Common Stock 4/2/2020  S(1)  91 D$487.29 (11)26017 D  
Common Stock 4/2/2020  S(1)  246 D$488.55 (12)25771 D  
Common Stock 4/2/2020  S(1)  128 D$489.39 (13)25643 D  
Common Stock 4/2/2020  S(1)  51 D$490.11 25592 D  
Common Stock 4/2/2020  S(1)  85 D$491.72 (14)25507 D  
Common Stock 4/2/2020  S(1)  109 D$492.6 (15)25398 D  
Common Stock 4/2/2020  S(1)  146 D$493.54 (16)25252 D  
Common Stock 4/2/2020  S(1)  91 D$494.68 (17)25161 (18)D  

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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares

Explanation of Responses:
(1) Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c).
(2) Represents volume-weighted average price of sales of 75 shares of Company stock on April 1, 2020 at prices ranging from $479.06 to $479.92. 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 April 1, 2020 at each separate price.
(3) Represents volume-weighted average price of sales of 87 shares of Company stock on April 1, 2020 at prices ranging from $481.85 to $481.98. 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 April 1, 2020 at each separate price.
(4) Represents volume-weighted average price of sales of 61 shares of Company stock on April 1, 2020 at prices ranging from $489.44 to $489.48. 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 April 1, 2020 at each separate price.
(5) Represents volume-weighted average price of sales of 87 shares of Company stock on April 1, 2020 at prices ranging from $490.41 to $490.99. 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 April 1, 2020 at each separate price.
(6) Represents volume-weighted average price of sales of 64 shares of Company stock on April 1, 2020 at prices ranging from $492.07 to $492.98. 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 April 1, 2020 at each separate price.
(7) Represents volume-weighted average price of sales of 156 shares of Company stock on April 1, 2020 at prices ranging from $493.00 to $493.19. 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 April 1, 2020 at each separate price.
(8) Represents volume-weighted average price of sales of 139 shares of Company stock on April 2, 2020 at prices ranging from $483.28 to $483.99. 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 April 2, 2020 at each separate price.
(9) Represents volume-weighted average price of sales of 62 shares of Company stock on April 2, 2020 at prices ranging from $485.01 to $485.95. 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 April 2, 2020 at each separate price.
(10) Represents volume-weighted average price of sales of 78 shares of Company stock on April 2, 2020 at prices ranging from $486.62 to $486.68. 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 April 2, 2020 at each separate price.
(11) Represents volume-weighted average price of sales of 91 shares of Company stock on April 2, 2020 at prices ranging from $487.04 to $487.76. 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 April 2, 2020 at each separate price.
(12) Represents volume-weighted average price of sales of 246 shares of Company stock on April 2, 2020 at prices ranging from $488.02 to $488.97. 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 April 2, 2020 at each separate price.
(13) Represents volume-weighted average price of sales of 128 shares of Company stock on April 2, 2020 at prices ranging from $489.07 to $489.76. 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 April 2, 2020 at each separate price.
(14) Represents volume-weighted average price of sales of 85 shares of Company stock on April 2, 2020 at prices ranging from $491.64 to $491.78. 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 April 2, 2020 at each separate price.
(15) Represents volume-weighted average price of sales of 109 shares of Company stock on April 2, 2020 at prices ranging from $492.37 to $492.99. 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 April 2, 2020 at each separate price.
(16) Represents volume-weighted average price of sales of 146 shares of Company stock on April 2, 2020 at prices ranging from $493.01 to $493.89. 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 April 2, 2020 at each separate price.
(17) Represents volume-weighted average price of sales of 91 shares of Company stock on April 2, 2020 at prices ranging from $494.00 to $494.97. 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 April 2, 2020 at each separate price.
(18) Form one of two

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Landry Robert E
777 OLD SAW MILL RIVER ROAD
TARRYTOWN, NY 10591


EVP Finance CFO

Signatures
/s/**Robert E. Landry4/3/2020
**Signature of Reporting PersonDate

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