REGENERON PHARMACEUTICALS, INC. (REGN) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-07-02 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: REGENERON PHARMACEUTICALS, INC. (REGN) CIK: 0000872589 --- Reporting Owner --- Name: RYAN ARTHUR F CIK: 0001187443 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-07-02 | Code: S (Open market sale) Shares: -200 | Price: $650.15 Total Value: $130,030.00 Shares Owned After: 17,303 | Ownership: D (Direct) Footnotes: [F1] Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on October 31, 2025. [F2] Represents volume-weighted average price of sales of 200 shares of Company stock on July 2, 2026 at prices ranging from $650.10 to $650.19. 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 July 2, 2026 at each separate price. --- Footnotes (Complete Index) --- F1: Disposition/acquisition made pursuant to a plan intended to comply with Rule 10b5-1(c) adopted on October 31, 2025. F2: Represents volume-weighted average price of sales of 200 shares of Company stock on July 2, 2026 at prices ranging from $650.10 to $650.19. 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 July 2, 2026 at each separate price. --- Signature --- /s/ /s/ Arthur F. Ryan (2026-07-07)