Regulation FD Disclosure ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Regular Quarterly Dividend ” that the registrant also issued on August 4, 2026, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subjec…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Second Quarter 2026 Results” that the registrant issued on August 4, 2026, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amend…

Director — Mary A. Tidlund: Mary A. Tidlund resigned as a director of the registrant.

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports First Quarter 2026 Results” that the registrant issued on May 5, 2026, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended,…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Regular Quarterly Dividend ” that the registrant also issued on March 4, 2026, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Fourth Quarter 2025 Results” that the registrant issued on March 4, 2026, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amende…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Regular Quarterly Dividend ” that the registrant also issued on November 5, 2025, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherw…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Third Quarter 2025 Results” that the registrant issued on November 5, 2025, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amen…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Announces a Special Dividend of $1.00 Per Share Payable in August 2025, and Declares Regular Quarterly Dividend ” that the registrant also issued on August 5, 2025, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes o…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Second Quarter 2025 Results” that the registrant issued on August 5, 2025, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amend…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports First Quarter 2025 Results” that the registrant issued on May 6, 2025, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended,…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Quarterly Dividend ” that the registrant also issued on March 5, 2025, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Fourth Quarter 2024 Results” that the registrant issued on March 5, 2025, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amende…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Quarterly Dividend ” that the registrant also issued on November 6, 2024, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Third Quarter 2024 Results” that the registrant issued on November 6, 2024, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amen…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Second Quarter 2024 Results” that the registrant issued on August 6, 2024, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amend…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Announces a Special Dividend of $2.00 Per Share Payable in August 2024, and Declares Regular Quarterly Dividend ” that the registrant also issued on August 6, 2024, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes o…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports First Quarter 2024 Results” that the registrant issued on May 7, 2024, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended,…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Announces Increase in Quarterly Dividend ” that the registrant also issued on February 28, 2024, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or…

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Fourth Quarter 2023 Results” that the registrant issued on February 28, 2024, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as am…

Director — Gina A. Norris: Election of Gina A. Norris to the board of directors and appointment to the audit committee.

Results of Operations and Financial Condition. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Reports Third Quarter 2023 Results” that the registrant issued on November 1, 2023, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.1 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amen…

Regulation FD Disclosure. ​ The registrant hereby furnishes the information set forth in its press release entitled “CompX Declares Regular Quarterly Dividend ” that the registrant also issued on November 1, 2023, a copy of which is attached hereto as Exhibit 99.2 and incorporated herein by reference. ​ The press release the registrant furnishes as Exhibit 99.2 to this current report is not deemed “filed” for purposes of section 18 of the Securities Exchange Act of 1934, as amended, or otherw…

Material Modification to Rights of Security Holders. To the extent required by

Director — Kevin B. Kramer: Kevin B. Kramer resigned as a director to take on a new role at another company.