X0508 4/A 2025-11-07 2025-11-12 0 0001821825 Organon & Co. OGN 0002096406 Drinane Juliana Papa C/O ORGANON &CO. 30 HUDSON STREET, FLOOR 33 JERSEY CITY NJ 07302 0 1 0 0 Interim Head of Mfg & Supply 0 Common Stock 2025-11-07 4 F 0 1242 6.71 D 17174.703 D On November 12, 2025, the reporting person filed a Form 4 which inadvertently reported that she acquired (A) 1,242 shares of Organon & Co. (Organon) common stock due to the sale of shares to satisfy a tax liability related to the acquisition of other shares of Organon common stock (code F), where in fact this number of shares should have been reported as a transaction resulting in her disposal (D) of such shares to satisfy the tax liability. As a result, the total amount of securities beneficially owned by the reporting person following such sale transaction on November 7, 2025, is now correctly reported on this Form 4 in column 5 as 17,174.703. /s/ Tarnetta V. Jones, as Attorney-in-Fact for Juliana Drinane 2026-01-16