X0609 4 2026-03-31 0 0001821825 Organon & Co. OGN 0001744046 Karp Daniel false C/O ORGANON & CO. 30 HUDSON STREET, FLOOR 33 JERSEY CITY NJ 07032 0 1 0 0 Executive VP, Corp. Dev. 0 Common Stock 2026-03-31 4 M 0 11338 0 A 68491.923 D Common Stock 2026-03-31 4 F 0 3554 5.70 D 64937.923 D Common Stock 2026-03-31 4 M 0 6715 0 A 71652.923 D Common Stock 2026-03-31 4 F 0 2105 5.70 D 69547.923 D Restricted Stock Units 2026-03-31 4 A 0 100166 0 A Common Stock 100166 100166 D Restricted Stock Units 2026-03-31 4 M 0 11338 0 D Common Stock 11338 0 D Restricted Stock Units 2026-03-31 4 M 0 6715 0 D Common Stock 6715 13432 D The price is the closing market price of Organon & Co. ("Organon") common stock on Monday, March 30, 2026, as required by the plan under which the Restricted Stock Units ("RSU") were awarded. On March 31, 2026, the Reporting Person was granted 100,166 RSUs, with each RSU representing a contingent right to receive one share of Organon common stock. These RSUs will vest and become exercisable in three equal installments on March 31, 2027, March 31, 2028, and March 31, 2029. Each RSU represents a contingent right to receive one share of Organon common stock. On March 31, 2023, the Reporting Person was granted 34,014 RSUs. Two-thirds of such RSUs previously vested, and the remaining one-third vested on March 31, 2026. On March 31, 2025, the Reporting Person was granted 20,147 RSUs. One-third of such RSUs vested on March 31, 2026, with the remaining two-thirds to vest on March 31, 2027 and March 31, 2028. /s/ Tarnetta V. Jones, as Attorney-in-Fact for Daniel Karp 2026-04-02