144 0001035145 XXXXXXXX LIVE 0001049606 COMPX INTERNATIONAL INC 001-13905 5430 LBJ FREEWAY SUITE 1700 DALLAS TX 75240-2620 9724481400 MANIX ANN Director Common Northern Trust Securities Inc

50 S Lasalle st Chicago IL 60603

1500 43710.00 12336657 08/10/2026 NYSE Common 05/21/2025 Stock Award Issuer N 750 05/21/2025 Compensation Common 05/22/2024 Stock Award Issuer N 800 05/22/2024 Compensation Y Shares are being sold in the following trust: Robert Cramer and Ann Manix Joint Trust 08/10/2026 Carmen Zamores as a duly authorized representative of National Financial Services LLC, as attorney-in-fact for MANIX ANN