On March 18, 2019, Gregory M. Swalwell, executive vice president and chief financial officer of the NL Industries, Inc., provided notice to the company that, effective as of June 1, 2019, he will retire as an officer of the company. Following such retirement notice of Mr. Swalwell, the company's board of directors took action, also effective as of June 1, 2019, to: elect Amy Allbach Samford, currently the company's vice president and controller, as the company's vice president and chief financial officer; and elect Patty S. Brinda as the company's vice president and controller. Ms. Samford has served as vice president and controller of each of the company and Valhi since 2016, and of Contran since 2017.

Beginning June 1, 2019, she will also serve as vice president and chief financial officer of CompX, and will continue to serve as vice president and controller of Valhi and Contran. Ms. Samford has served in various accounting and financial positions (including officer positions) in various companies related to and Contran since 2006. Ms. Brinda has served in various accounting and financial positions in various companies related to and Contran since 1989.