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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
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)
SVP Finance & CFO
(Last)
(First)
(Middle)
777 OLD SAW MILL RIVER ROAD		 3. Date of Earliest Transaction (Month/Day/Year)
08/28/2024
(Street)

TARRYTOWN, NY 10591		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 08/28/2024   S   228 D $ 1,204.79 (1) 966 I 2021 GRAT
Common Stock 08/28/2024   S   766 D $ 1,205.44 (2) 200 I 2021 GRAT
Common Stock 08/28/2024   S   200 D $ 1,206.3 (3) 0 I 2021 GRAT
Common Stock 08/28/2024   S   2,237 D $ 1,204.71 (4) 1,378 I 2022 GRAT
Common Stock 08/28/2024   S   928 D $ 1,205.49 (5) 450 I 2022 GRAT
Common Stock 08/28/2024   S   450 D $ 1,206.15 (6) 0 I 2022 GRAT
Common Stock 08/28/2024   S   236 D $ 1,205.67 (7) 225 I by Trust for Daugh
Common Stock 08/28/2024   S   200 D $ 1,206.7 (8) 25 I by Trust for Daugh
Common Stock 08/28/2024   S   235 D $ 1,205.67 (9) 225 I by Trust for Son
Common Stock 08/28/2024   S   200 D $ 1,206.67 (10) 25 I by Trust for Son
Common Stock               15,305 D  
Common Stock               1,515 I By 401(k) Plan
Common Stock               1,897 I By Trust (11)

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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 Underlying Securities
(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

Reporting Owners

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

Signatures

 /s/**Christopher R. Fenimore   08/29/2024
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Represents volume-weighted average price of sales of 228 shares of Company stock on August 28, 2024 at prices ranging from $1,204.76 to $1,204.83. 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 August 28, 2024 at each separate price.
(2) Represents volume-weighted average price of sales of 766 shares of Company stock on August 28, 2024 at prices ranging from $1,205.02 to $1,205.78. 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 August 28, 2024 at each separate price.
(3) Represents volume-weighted average price of sales of 200 shares of Company stock on August 28, 2024 at prices ranging from $1,206.09 to $1,206.63. 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 August 28, 2024 at each separate price.
(4) Represents volume-weighted average price of sales of 2,237 shares of Company stock on August 28, 2024 at prices ranging from $1,204.00 to $1,204.99. 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 August 28, 2024 at each separate price.
(5) Represents volume-weighted average price of sales of 928 shares of Company stock on August 28, 2024 at prices ranging from $1,205.00 to $1,205.99. 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 August 28, 2024 at each separate price.
(6) Represents volume-weighted average price of sales of 450 shares of Company stock on August 28, 2024 at prices ranging from $1,206.00 to $1,206.66. 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 August 28, 2024 at each separate price.
(7) Represents volume-weighted average price of sales of 236 shares of Company stock on August 28, 2024 at prices ranging from $1,205.51 to $1,205.78. 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 August 28, 2024 at each separate price.
(8) Represents volume-weighted average price of sales of 200 shares of Company stock on August 28, 2024 at prices ranging from $1,206.66 to $1,206.86. 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 August 28, 2024 at each separate price.
(9) Represents volume-weighted average price of sales of 235 shares of Company stock on August 28, 2024 at prices ranging from $1,205.51 to $1,205.78. 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 August 28, 2024 at each separate price.
(10) Represents volume-weighted average price of sales of 200 shares of Company stock on August 28, 2024 at prices ranging from $1,206.65 to $1,206.68. 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 August 28, 2024 at each separate price.
(11) 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.

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