Regeneron (REGN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-09-02 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: REGENERON PHARMACEUTICALS, INC. (REGN) CIK: 0000872589 --- Reporting Owner --- Name: McCourt Marion CIK: 0001663758 Role: Officer (EVP Commercial) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-09-02 | Code: S (Open market sale) Shares: -1,215 | Price: $850.00 Total Value: $1,032,750.00 Shares Owned After: 13,134 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 17, 2026. [Transaction #2] Security: Common Stock Date: 2026-09-03 | Code: S (Open market sale) Shares: -1,131 | Price: $857.39 Total Value: $969,708.09 Shares Owned After: 12,003 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 17, 2026. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on February 17, 2026. --- Signature --- /s/ /s/ Marion McCourt (2026-09-03)