Regeneron (REGN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-10 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: REGENERON PHARMACEUTICALS, INC. (REGN) CIK: 0000872589 --- Reporting Owner --- Name: Zoghbi Huda Y CIK: 0001681643 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-10 | Code: M (Exercise of derivative) Shares: +800 | Price: $376.69 Total Value: $301,352.00 Shares Owned After: 2,503 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on November 20, 2025. [Transaction #2] Security: Common Stock Date: 2026-08-10 | Code: S (Open market sale) Shares: -800 | Price: $800.00 Total Value: $640,000.00 Shares Owned After: 1,703 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on November 20, 2025. --- Derivative Transactions --- [Transaction #1] Security: Non-Qualified Stock Option (right to buy) Date: 2026-08-10 | Code: M (Exercise of derivative) Shares: -800 | Price: $0.00 Exercisable: N/A | Expires: 2027-01-03 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on November 20, 2025. [F2] The stock option vested in three equal annual installments, commencing one year after the date of grant. --- Footnotes (Complete Index) --- F1: Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on November 20, 2025. F2: The stock option vested in three equal annual installments, commencing one year after the date of grant. --- Signature --- /s/ /s/ Huda Y. Zoghbi (2026-08-12)