CompX International Inc.

Submission of Matters to a Vote of Security Holders. ​ The registrant held its 2025 annual meeting of stockholders on May 21, 2025. At the 2025 annual meeting,

, and the exhibit in Item 9.01, is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the

Financial Statements and Exhibits. ​ ​ ​ (d) Exhibits ​ ​ ​ ​ ​ ​ ​ Item No. ​ Description ​ ​ ​ ​ ​ 99.1 ​ Press release dated May 21, 2025 issued by the regis