144 0001606509 XXXXXXXX LIVE 0001049606 CompX International Inc. 001-13905 5430 LBJ Freeway Suite 1700 Dallas TX 75240-2620 972 448-1400 Mary Tidlund Director Class A Common Stock RBC Direct Investing Inc.

Royal Bank Plaza 200 Bay Street, North Tower P.O. Box 75 Toronto A6 M5J 2Z5

3600 100980 12318557 11/12/2024 NYSE American Class A Common Stock 05/24/2017 Director stock grant CompX International Inc. N 1000 05/24/2017 None Class A Common Stock 05/23/2018 Director stock grant CompX International Inc. N 1350 05/23/2018 None Class A Common Stock 05/22/2019 Director stock grant CompX International Inc. N 1250 05/22/2019 None Y 11/12/2024 Mary Tidlund