Mark D. Williamson

Texas Oil & Chemical Co. II, Inc. provides petroleum refining services. The company is headquartered in Silsbee, TX.

Trecora Resources engages in the manufacture and sale of petrochemical products and synthetic waxes and the provision of custom processing services. It operates through the Specialty Petrochemical and Specialty Waxes segments. The Specialty Petrochemical segment produces high purity hydrocarbons and other petroleum-based products including isopentane, normal pentane, isohexane, and hexane. The Specialty Waxes segment manufactures specialty polyethylene and poly alpha olefin waxes and provides custom processing services. The company was founded on May 4, 1967 and is headquartered in Sugar Land, TX.

South Hampton Resources, Inc. is engaged in manufacturing petrochemicals. Its products include normal pentane, isopentane, isohexane, cyclopentane, and petroleum ether. The company was founded by John Breaker in 1955 and is headquartered in Silsbee, TX.