Arthur F. Ryan plan to sell securities of Regeneron Pharmaceuticals, Inc. under Form 144

Arthur F. Ryan filed Form 144 to notify SEC of plan to sell 400 units of Regeneron Pharmaceuticals, Inc. securities around 2026-07-02, with aggregate market value of $249,888.00. The total outstanding units is 103020000.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 05/01/2026, sold 100 units for $70523.79;