Harold Clark Simmons

Duratek, Inc. provides radioactive materials disposal services. The company provides safe & secure packaging, transportation, processing, storing and disposal of radioactive materials. The company customers include nuclear utilities, universities, laboratories, radiopharmaceutical & industrial facilities disposition and nuclear facility operation services to commercial and government customers. It has supported clean-up projects in Asia and the Middle East. The company was founded in 1990 and is headquartered in Columbia, GA.

Titanium Metals Corp. produces titanium sponge, ingot, and slab. Its activities include all phases of titanium manufacturing and sales, from converting rutile ore into sponge, to production of ingot and slab and mill products. The firm's products include titanium sponge, melted products, mill products and industrial fabrications. The company was founded in 1950 and is headquartered in Exton, PA.

Valcor, Inc. manufactures ergonomic office workstation components. Its products include precision ball bearing drawer slides and low and medium-security mechanical locks. The company was founded in 1993 and is headquartered in Dallas, TX.

Contran Corp. manufactures and markets chemicals. It conducts diversified operations in chemicals, metals, waste management, computer support systems and precision ball bearing slides and locking systems. The company is headquartered in Dallas, TX.

Kronos International, Inc. produces and markets titanium dioxide pigments. The company was founded on October 8, 2004 and is headquartered in Dallas, TX.