REGENERON PHARMACEUTICALS, INC.

Code

F

Shares

12,853

Price

$754.58

Footnotes

23

Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on May 7, 2026. Represents volume-weighted average price of sales of 14 shares of Company stock on October 14, 2026 at prices ranging from $759.94 to $759.96. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 74 shares of Company stock on October 14, 2026 at prices ranging from $760.28 to $760.94. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 27 shares of Company stock on October 14, 2026 at prices ranging from $761.01 to $761.68. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 25 shares of Company stock on October 14, 2026 at prices ranging from $763.62 to $763.94. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 219 shares of Company stock on October 14, 2026 at prices ranging from $764.04 to $764.82. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 271 shares of Company stock on October 14, 2026 at prices ranging from $765.11 to $765.78. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 279 shares of Company stock on October 14, 2026 at prices ranging from $766.00 to $766.95. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 192 shares of Company stock on October 14, 2026 at prices ranging from $767.10 to $767.82. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 105 shares of Company stock on October 14, 2026 at prices ranging from $768.15 to $768.59. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 127 shares of Company stock on October 14, 2026 at prices ranging from $769.15 to $769.93. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 283 shares of Company stock on October 14, 2026 at prices ranging from $771.04 to $771.95. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 211 shares of Company stock on October 14, 2026 at prices ranging from $772.06 to $772.74. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 224 shares of Company stock on October 14, 2026 at prices ranging from $773.14 to $773.84. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 121 shares of Company stock on October 14, 2026 at prices ranging from $774.11 to $774.85. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 376 shares of Company stock on October 14, 2026 at prices ranging from $775.14 to $775.92. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 66 shares of Company stock on October 14, 2026 at prices ranging from $776.00 to $776.98. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 38 shares of Company stock on October 14, 2026 at prices ranging from $777.51 to $777.92. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 454 shares of Company stock on October 14, 2026 at prices ranging from $778.05 to $778.99. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 380 shares of Company stock on October 14, 2026 at prices ranging from $779.00 to $779.97. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 463 shares of Company stock on October 14, 2026 at prices ranging from $780.06 to $780.89. 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 October 14, 2026 at each separate price. Represents volume-weighted average price of sales of 50 shares of Company stock on October 14, 2026 at prices ranging from $781.05 to $781.84. 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 October 14, 2026 at each separate price. The stock option award vested in four equal annual installments, commencing one year after the date of grant.