Regeneron (REGN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-01-02 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: REGENERON PHARMACEUTICALS, INC. (REGN) CIK: 0000872589 --- Reporting Owner --- Name: POON CHRISTINE A CIK: 0001189014 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-01-02 | Code: A (Grant or award) Shares: +155 | Price: $0.00 Shares Owned After: 5,219 | Ownership: D (Direct) Footnotes: [F1] Reflects an acquisition of time-based vesting restricted stock units each representing a contingent right to receive one share of the Issuer's common stock. --- Derivative Transactions --- [Transaction #1] Security: Non-Qualified Stock Option (right to buy) Date: 2026-01-02 | Code: A (Grant or award) Shares: +1,962 | Price: $0.00 Exercisable: N/A | Expires: 2036-01-02 Shares Owned After: 1,962 | Ownership: D (Direct) Footnotes: [F2] On the date of the Issuer's first annual meeting of shareholders following the date of grant, a portion of these stock options equal to the portion of one year that has passed from the date of grant shall then become exercisable, and the remainder shall become exercisable on the first anniversary of the date of grant. --- Footnotes (Complete Index) --- F1: Reflects an acquisition of time-based vesting restricted stock units each representing a contingent right to receive one share of the Issuer's common stock. F2: On the date of the Issuer's first annual meeting of shareholders following the date of grant, a portion of these stock options equal to the portion of one year that has passed from the date of grant shall then become exercisable, and the remainder shall become exercisable on the first anniversary of the date of grant. --- Signature --- /s/ /s/ Christine A. Poon (2026-01-06)