CompX International Inc. announced on December 12, 2022, Robert D. Graham, vice chairman of the board of the company, provided notice to the company of his retirement, effective as of December 31, 2022, as a director and vice chairman of the board of the company. Following such retirement notice of Mr. Graham, the company 's board of directors took action to elect Michael S. Simmons as vice chairman of the board of the registrant, effective as of January 1, 2023, and to reduce the size of the board from nine to eight members upon Mr. Graham's retirement as a director. Mr. Simmons, age 51, has served as a director and executive vice president of the registrant since June 2022.

He previously served as the registrant's senior vice president and chief financial officer from 2021 to June 2022. He also currently serves as a director and president of Valhi, as executive vice president, finance of Kronos Worldwide, as executive vice president of NL, and as senior vice president, finance of Contran. Beginning January 1, 2023, he will serve as a director, vice chairman of the board, president and chief executive officer of Valhi; as a director and vice chairman of the board of the company, NL and Kronos Worldwide; and as a director, president and chief executive officer of Contran.

Mr. Simmons has served in accounting and financial positions (including officer positions) with various companies related to the company and Contran since 2018. From 1994 to 2018, Mr. Simmons was employed by PwC, most recently as a managing director.