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 * Fenimore Christopher R. 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)
VP Controller
(Last)         (First)         (Middle)
777 OLD SAW MILL RIVER ROAD
3. Date of Earliest Transaction (MM/DD/YYYY)
6/15/2020
(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  6/15/2020    M(1)    7226  A $52.03  20323  D   
Common Stock  6/15/2020    F(1)    3670  D $587.9  16653  D   
Common Stock  6/15/2020    M    2180  A $30.63  18833  D   
Common Stock  6/16/2020    S(1)    112  D $581.4 (2) 18721  D   
Common Stock  6/16/2020    S(1)    18  D $582.69 (3) 18703  D   
Common Stock  6/16/2020    S(1)    111  D $583.06  18592  D   
Common Stock  6/16/2020    S(1)    99  D $584.62  18493  D   
Common Stock  6/16/2020    S(1)    130  D $585.76 (4) 18363  D   
Common Stock  6/16/2020    S(1)    413  D $586.54 (5) 17950  D   
Common Stock  6/16/2020    S(1)    373  D $587.55 (6) 17577  D   
Common Stock  6/16/2020    S(1)    147  D $588.8 (7) 17430  D   
Common Stock  6/16/2020    S(1)    153  D $590.7 (8) 17277  D   
Common Stock  6/16/2020    S(1)    233  D $591.61 (9) 17044  D   
Common Stock  6/16/2020    S(1)    214  D $592.2 (10) 16830  D   
Common Stock  6/16/2020    S(1)    109  D $593.25  16721  D   
Common Stock  6/16/2020    S(1)    747  D $594.35 (11) 15974  D   
Common Stock  6/16/2020    S(1)    403  D $595.5 (12) 15571  D   
Common Stock  6/16/2020    S(1)    294  D $596.36 (13) 15277  D   
Common Stock                 1430  I  By 401(k) Plan 
Common Stock                 1897  I  By Trust (14)
Common Stock                 509  I  by 2017 GRAT 
Common Stock                 2284  I  by 2018 GRAT 

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
Incentive Stock Option (right to buy)  $30.63  6/15/2020    M        2180    (15) 12/14/2020  Common Stock  2180  $0.0  0  D   
Non-Qualified Stock Option (right to buy)  $52.03  6/15/2020    M (1)       7226    (16) 12/16/2021  Common Stock  7226  $0.0  0  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 112 shares of Company stock on June 16, 2020 at prices ranging from $581.39 to $581.40. 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 June 16, 2020 at each separate price.
(3)  Represents volume-weighted average price of sales of 18 shares of Company stock on June 16, 2020 at prices ranging from $582.53 to $582.78. 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 June 16, 2020 at each separate price.
(4)  Represents volume-weighted average price of sales of 130 shares of Company stock on June 16, 2020 at prices ranging from $585.11 to $585.89. 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 June 16, 2020 at each separate price.
(5)  Represents volume-weighted average price of sales of 413 shares of Company stock on June 16, 2020 at prices ranging from $586.29 to $586.84. 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 June 16, 2020 at each separate price.
(6)  Represents volume-weighted average price of sales of 373 shares of Company stock on June 16, 2020 at prices ranging from $587.05 to $587.93. 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 June 16, 2020 at each separate price.
(7)  Represents volume-weighted average price of sales of 147 shares of Company stock on June 16, 2020 at prices ranging from $588.60 to $588.89. 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 June 16, 2020 at each separate price.
(8)  Represents volume-weighted average price of sales of 153 shares of Company stock on June 16, 2020 at prices ranging from $590.00 to $590.88. 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 June 16, 2020 at each separate price.
(9)  Represents volume-weighted average price of sales of 233 shares of Company stock on June 16, 2020 at prices ranging from $591.06 to $591.95. 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 June 16, 2020 at each separate price.
(10)  Represents volume-weighted average price of sales of 214 shares of Company stock on June 16, 2020 at prices ranging from $592.01 to $592.41. 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 June 16, 2020 at each separate price.
(11)  Represents volume-weighted average price of sales of 747 shares of Company stock on June 16, 2020 at prices ranging from $594.05 to $594.98. 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 June 16, 2020 at each separate price.
(12)  Represents volume-weighted average price of sales of 403 shares of Company stock on June 16, 2020 at prices ranging from $595.08 to $595.96. 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 June 16, 2020 at each separate price.
(13)  Represents volume-weighted average price of sales of 294 shares of Company stock on June 16, 2020 at prices ranging from $596.00 to $596.59. 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 June 16, 2020 at each separate price.
(14)  These shares are held in a trust for the benefit of the reporting person's spouse. The reporting person and the reporting person's spouse are trustees of the trust.
(15)  The stock option award (combined incentive stock option and non-qualified stock option) vests in four equal annual installments, commencing one year after the date of grant.
(16)  The stock option award vests in four equal annual installments, commencing one year after the date of grant.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Fenimore Christopher R.
777 OLD SAW MILL RIVER ROAD
TARRYTOWN, NY 10591


VP Controller

Signatures
/s/**Christopher R. Fenimore 6/17/2020
**Signature of Reporting Person Date
Regeneron Pharmaceuticals (NASDAQ:REGN)
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