X0306 4 2022-02-09 0 0001821825 Organon & Co. OGN 0001861045 DiMarco Kathryn C/O ORGANON & CO. 30 HUDSON STREET, FLOOR 33 JERSEY CITY NJ 07302 0 1 0 0 Corporate Controller Common Stock 2022-02-09 4 M 0 1869 0.00 A 2672 D Common Stock 2022-02-09 4 F 0 745 33.75 D 1927 D Restricted Stock Units 2022-02-09 4 M 0 1869 0.00 D 2022-02-09 2024-02-09 Common Stock 1869 3740 D Each restricted stock unit represents a contingent right to receive one share of Organon & Co. ("Organon") common stock. On June 2, 2021 in connection with the separation of Organon from Merck & Co., Inc., the restricted stock unit award was converted into a restricted stock unit award with 5,609 shares of Organon common stock underlying such award. These restricted stock units vest and are distributed as shares of Organon common stock in three equal installments. The first installment vested and has been distributed on February 9, 2022. The remaining installments will vest and be distributed on each of February 9, 2023 and February 9, 2024. /s/ Tarnetta V. Jones, as Attorney-in-Fact for Kathryn DiMarco 2022-02-10