X0609 4 2026-03-31 0 0001821825 Organon & Co. OGN 0001714080 Arjona Ferreira Juan Camilo false C/O ORGANON &CO. 30 HUDSON STREET, FLOOR 33 JERSEY CITY NJ 07302 0 1 0 0 Head of R&D & CMO 0 Common Stock 2026-03-31 4 M 0 13431 0 A 34867.477 D Common Stock 2026-03-31 4 F 0 4820 5.70 D 30047.477 D Restricted Stock Units 2026-03-31 4 A 0 200333 0 A Common Stock 200333 200333 D Restricted Stock Units 2026-03-31 4 M 0 13431 0 D Common Stock 13431 26864 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 200,333 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, 2025, the Reporting Person was granted 40,295 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 Jones, as Attorney-in-fact for Dr. Juan Camilo Arjona Ferreira 2026-04-02