Plains Marketing is a subsidiary of Plains All American Pipeline, a master limited partnership engaged in interstate and intrastate crude oil transportation. The company also gathers, markets and stores crude oil, as well as markets and stores liquefied petroleum gas and other petroleum products. Plains All American Pipeline has a 50 percent ownership in PAA/Vulcan Gas Storage, which develops and operates a variety of natural gas storage facilities. It is one of the largest independent midstream crude oil companies in North America. The company handles more than 3 million barrels per day of physical crude oil through a network of assets throughout the United States and Canada. Plains Marketing maintains a location in Houston.

Texas Aromatics is a petrochemical marketing company specializing in aromatic feedstocks, aromatics and olefins, gasoline blend-stocks and heavy fuels. It has more than 275,000 barrels of storage capacity with the capability of transporting product via pipeline, vessel, barge, rail and truck. Texas Aromatics has been solving petrochemical industry problems since 1984. The company markets by-products and co-products in addition to specification petrochemicals, but does not deal in waste products. Texas Aromatics is headquartered in Houston.