Contran
Chemical ManufacturingUnited States51-200 Employees
Contran is a holding company that owns stakes of varying sizes in subsidiaries, including the largest, Valhi, Inc. (a publicly traded company about 93% controlled by Contran). Primarily through Valhi, the company has stakes in diversified operations in chemicals (NL Industries and Kronos Worldwide); waste management (Waste Control Specialists); and computer support systems, precision ball bearing slides, and security products (CompX International). Keystone Consolidated Industries, a maker of fencing and wire products, is also a wholly owned subsidiary of Contran. Contran is controlled by the family of late chairman Harold Simmons.