Channel-Track & Tube-Way Industries, Inc.

Petrochemical, refining and commercial are among the Wholesale Electric Supplies. The company provides electrical supplies and related services to clients in the industrial and commercial markets worldwide, including the chemical, original equipment manufacturer and utility markets. In addition to a variety of electrical products, the company offers services that include commercial project management, information technology, utilities, voice and data, construction material management, original equipment manufacturing, modification and automation. Wholesale Electric Supply s products and work can be seen in numerous buildings in Houston, the Astrodome, the Houston Medical Center and chemical, petrochemical and refining complexes along the Gulf Coast and in Mexico, Singapore, Yemen and Saudi Arabia. The company was founded in 1949 and is headquartered in Houston.

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.