Effective July 16, 2019, and upon entry of an agreed final judgment by the probate court of Dallas County in the state of Texas, Lisa K. Simmons and Serena Simmons Connelly appointed Kalita Blessing and Terri Lacy as successor co-trustees of the Harold C. Simmons Family Trust No. 2 (the “Family Trust”), which was established for the benefit of Ms. Simmons and Ms. Connelly and their children and for which Ms. Simmons and Ms. Connelly previously served as co-trustees. Ms. Simmons and Ms. Connelly retain the ability to appoint qualifying successor trustees of the Family Trust if either or both Ms. Blessing and Ms. Lacy resign or otherwise do not serve as trustee.

As of July 16, 2019, NL Industries, Inc. (“NL”) owns approximately 86% of the registrant’s outstanding common stock, Valhi owns approximately 83% of NL’s outstanding common stock, and a wholly-owned subsidiary of Contran Corporation (“Contran”) owns approximately 92% of Valhi’s outstanding common stock. A majority of Contran’s outstanding voting stock is held directly by Ms. Simmons and Ms. Connelly and various family trusts established for the benefit of Ms. Simmons and Ms. Connelly and their children and for which Ms. Simmons or Ms. Connelly, as applicable, serves as trustee. The remainder of Contran’s outstanding voting stock is held by the Family Trust.

Ms. Simmons and Ms. Connelly and the trustees of the Family Trust may be deemed to control Contran, Valhi, NL and the registrant.

About CompX International Inc. (NYSEMKT:CIX)

CompX International Inc. is a manufacturer of security products used in the recreational transportation, postal, office and institutional furniture, cabinetry, tool storage, healthcare and other industries, and stainless steel exhaust systems, gauges and throttle controls for the recreational marine industry. The Company operates through two business segments: Security Products and Marine Components. Its security products include disc tumbler locks; pin tumbler locking mechanisms, and CompX eLock and StealthLock electronic locks. Its marine components include original equipment and aftermarket stainless steel exhaust headers, exhaust pipes, mufflers and other exhaust components; gauges; mechanical and electronic controls and throttles; steering wheels and other billet aluminum accessories, and dash panels. The Company’s brands include National Cabinet Lock, Fort Lock, Timberline Lock, Chicago Lock, Mega Rim, Race Rim, Vantage View and GEN-X.