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 * BROWN MICHAEL S 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
_____ Officer (give title below)    _____ Other (specify below)
(Last)         (First)         (Middle)
777 OLD SAW MILL RIVER ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)
7/1/2020
(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  7/1/2020    M(1)    3613  A $413.33  4256  D   
Common Stock  7/1/2020    S(1)    100  D $601.7  4156  D   
Common Stock  7/1/2020    S(1)    627  D $603.39 (2) 3529  D   
Common Stock  7/1/2020    S(1)    960  D $604.82 (3) 2569  D   
Common Stock  7/1/2020    S(1)    401  D $605.78 (4) 2168  D   
Common Stock  7/1/2020    S(1)    319  D $608.59 (5) 1849  D   
Common Stock  7/1/2020    S(1)    200  D $609.51 (6) 1649  D   
Common Stock  7/1/2020    S(1)    100  D $615.23  1549  D   
Common Stock  7/1/2020    S(1)    200  D $616.49  1349  D   
Common Stock  7/1/2020    S(1)    100  D $623.07  1249  D   
Common Stock  7/1/2020    S(1)    6  D $624.19  1243  D   
Common Stock  7/1/2020    S(1)    200  D $607.35 (7) 1043  D   
Common Stock  7/1/2020    S(1)    400  D $612.29 (8) 643  D   
Common Stock                 5000  I  by SLAT (9)
Common Stock                 11349  I  by Trust 

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)  $413.33  7/1/2020    M (1)       3613    (10) 1/2/2025  Common Stock  3613  $0.0  7225  D   

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 627 shares of Company stock on July 1, 2020 at prices ranging from $602.95 to $603.85. 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 July 1, 2020 at each separate price.
(3)  Represents volume-weighted average price of sales of 960 shares of Company stock on July 1, 2020 at prices ranging from $604.16 to $605.03. 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 July 1, 2020 at each separate price.
(4)  Represents volume-weighted average price of sales of 401 shares of Company stock on July 1, 2020 at prices ranging from $605.25 to $606.19. 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 July 1, 2020 at each separate price.
(5)  Represents volume-weighted average price of sales of 319 shares of Company stock on July 1, 2020 at prices ranging from $608.14 to $609.12. 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 July 1, 2020 at each separate price.
(6)  Represents volume-weighted average price of sales of 200 shares of Company stock on July 1, 2020 at prices ranging from $609.22 to $609.80. 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 July 1, 2020 at each separate price.
(7)  Represents volume-weighted average price of sales of 200 shares of Company stock on July 1, 2020 at prices ranging from $607.10 to $607.59. 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 July 1, 2020 at each separate price.
(8)  Represents volume-weighted average price of sales of 400 shares of Company stock on July 1, 2020 at prices ranging from $612.21 to $612.35. 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 July 1, 2020 at each separate price.
(9)  These shares are held in a trust for the benefit of the reporting person's immediate family members. The reporting person's spouse is trustee of the trust. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
(10)  The stock option becomes exercisable in three equal annual installments, commencing one year after the date of grant.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
BROWN MICHAEL S
777 OLD SAW MILL RIVER ROAD
TARRYTOWN, NY 10591
X



Signatures
/s/**Michael S. Brown 7/2/2020
**Signature of Reporting Person Date
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