SCHLEIFER LEONARD S 4

4 · REGENERON PHARMACEUTICALS, INC. · Filed May 15, 2024

Insider Transaction Report

Form 4

Period: 2024-05-13

REGENERON PHARMACEUTICALS, INC.REGN

SCHLEIFER LEONARD S

DirectorCEO and President10% Owner

Transactions

Exercise/Conversion
Common Stock
2024-05-13$399.66/sh+203,204$81,212,511→ 577,633 total
Sale
Common Stock
2024-05-14$979.16/sh−22,698$22,224,974→ 410,502 total
Sale
Common Stock
2024-05-15$980.64/sh−295$289,289→ 400,041 total
Sale
Common Stock
2024-05-15$982.66/sh−235$230,925→ 398,725 total
Sale
Common Stock
2024-05-15$981.50/sh−1,081$1,061,002→ 398,960 total
Tax Payment
Common Stock
2024-05-13$976.79/sh−144,433$141,080,710→ 433,200 total
Sale
Common Stock
2024-05-14$980.10/sh−2,302$2,256,190→ 408,200 total
Sale
Common Stock
2024-05-15$979.05/sh−7,864$7,699,249→ 400,336 total
Sale
Common Stock
2024-05-15$988.76/sh−299$295,639→ 397,259 total
Sale
Common Stock
2024-05-15$983.91/sh−250$245,978→ 398,475 total
Sale
Common Stock
2024-05-15$984.00/sh−305$300,120→ 398,170 total
Sale
Common Stock
2024-05-15$985.72/sh−281$276,987→ 397,889 total
Sale
Common Stock
2024-05-15$986.57/sh−103$101,617→ 397,786 total
Sale
Common Stock
2024-05-15$987.46/sh−228$225,141→ 397,558 total
Exercise/Conversion
Non-Qualified Stock Option (right to buy)
2024-05-13−203,204→ 0 total
Exercise: $399.66Exp: 2024-12-16→ Common Stock (203,204 underlying)

Holdings

Common Stock
(indirect: By Trust)
64,985
Common Stock
(indirect: 2023 GRAT)
250,000
Common Stock
(indirect: By 401(k))
5,932

Footnotes (14)

[F1]Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 5, 2024.
[F10]Represents volume-weighted average price of sales of 281 shares of Company stock on May 15, 2024 at prices ranging from $985.13 to $985.84. 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 May 15, 2024 at each separate price.
[F11]Represents volume-weighted average price of sales of 103 shares of Company stock on May 15, 2024 at prices ranging from $986.37 to $986.96. 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 May 15, 2024 at each separate price.
[F12]Represents volume-weighted average price of sales of 228 shares of Company stock on May 15, 2024 at prices ranging from $987.31 to $987.63. 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 May 15, 2024 at each separate price.
[F13]Represents volume-weighted average price of sales of 299 shares of Company stock on May 15, 2024 at prices ranging from $988.00 to $988.97. 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 May 15, 2024 at each separate price.
[F14]The stock option award vests in four equal annual installments, commencing one year after the date of grant.
[F2]Represents volume-weighted average price of sales of 22,698 shares of Company stock on May 14, 2024 at prices ranging from $979.00 to $979.99. 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 May 14, 2024 at each separate price.
[F3]Represents volume-weighted average price of sales of 2,302 shares of Company stock on May 14, 2024 at prices ranging from $980.00 to $980.99. 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 May 14, 2024 at each separate price.
[F4]Represents volume-weighted average price of sales of 7,864 shares of Company stock on May 15, 2024 at prices ranging from $979.00 to $979.50. 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 May 15, 2024 at each separate price.
[F5]Represents volume-weighted average price of sales of 295 shares of Company stock on May 15, 2024 at prices ranging from $980.17 to $980.98. 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 May 15, 2024 at each separate price.
[F6]Represents volume-weighted average price of sales of 1,081 shares of Company stock on May 15, 2024 at prices ranging from $981.09 to $981.90. 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 May 15, 2024 at each separate price.
[F7]Represents volume-weighted average price of sales of 235 shares of Company stock on May 15, 2024 at prices ranging from $982.31 to $982.68. 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 May 15, 2024 at each separate price.
[F8]Represents volume-weighted average price of sales of 250 shares of Company stock on May 15, 2024 at prices ranging from $983.82 to $983.98. 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 May 15, 2024 at each separate price.
[F9]Represents volume-weighted average price of sales of 305 shares of Company stock on May 15, 2024 at prices ranging from $984.00 to $984.02. 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 May 15, 2024 at each separate price.

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