144 0002068746 XXXXXXXX LIVE 0001821825 Organon & Co. 001-40235 30 Hudson St, Floor 33 JERSEY CITY NJ 07302 551-430-6900 Holzbaur Lynette Affiliate Common Stock Morgan Stanley Global Stock Plan Services

P.O. Box 182616 Columbus OH 43218-2616

26448 353080.40 262600862 05/06/2026 NYSE Common 06/14/2024 Dividend equivalent shares from RSUs-See Remarks Issuer N 90 06/14/2024 N/A-See Remarks Common 09/13/2024 Dividend equivalent shares from RSUs-See Remarks Issuer N 1 09/13/2024 N/A-See Remarks Common 11/07/2024 Vested RSU-See Remarks Issuer N 1728 11/07/2024 N/A See Remarks Common 12/13/2024 Dividend equivalent shares from RSUs-See Remarks Issuer N 34 12/13/2024 N/A See Remarks Common 03/14/2025 Dividend equivalent shares from RSUs-See Remarks Issuer N 34 03/14/2025 N/A-See Remarks Common 03/29/2025 Vested RSU-See Remarks Issuer N 3803 03/29/2025 N/A-See Remarks Common 03/31/2025 Vested RSU-See Remarks Issuer N 3040 03/31/2025 N/A-See Remarks Common 03/31/2025 Vested RSU-See Remarks Issuer N 2047 03/31/2025 N/A-See Remarks Common 06/13/2025 Dividend equivalent shares from RSUs-See Remarks Issuer N 21 06/13/2025 N/A See Remarks Common 09/12/2025 Dividend equivalent shares from RSUs-See Remarks Issuer N 20 09/12/2025 N/A-See Remarks Common 11/05/2025 Vested RSU- See Remarks Issuer N 2171 11/05/2025 N/A-See Remarks Common 11/07/2025 Vested RSU-See Remarks Issuer N 1728 11/07/2025 N/A-See Remarks Common 12/12/2025 Dividend equivalent shares from RSUs-See Remarks Issuer N 40 12/12/2025 N/A-See Remarks Common 03/13/2026 Dividend equivalent shares from RSUs-See Remarks Issuer N 46 03/13/2026 N/A-See Remarks Common 03/29/2026 Vested RSU-See remarks Issuer N 3803 03/29/2026 N/A-See Remarks Common 03/31/2026 Vested RSU-See Remarks Issuer N 4801 03/31/2026 N/A-See Remarks Common 03/31/2026 Vested RSU-See Remarks Issuer N 3040 03/31/2026 N/A-See Remarks Y The reporting person became a Rule 144 control person on May 15, 2025. All securities held by the reporting person (i) were acquired pursuant to the Issuer's equity compensation plan and registered on a Form S-8 and/or (ii) were acquired prior to May 15, 2025. At the time of sale, such securities were Rule 144 control securities but not Rule 144 restricted securities. 05/08/2026 /s/ Lynette Holzbaur