John V. Genova

Holly Corp. refines and markets petroleum products. It primarily produces light products, including gasoline, diesel fuel and jet fuel. It operates the Navajo Refinery in New Mexico and the Woods Cross Refinery in Utah. It was founded in 1947 and is headquartered in Dallas, TX.

Organized in 1998, Encore is a growing independent energy company engaged in the acquisition, development and exploitation of North American oil and natural gas reserves

Sterling Chemicals, Inc. produces petrochemicals. Its products include acetic acid and plasticizers, which are used to manufacture consumer goods and industrial products. The company was founded in 1986 and is headquartered in Houston, TX.

Exxon Mobil International Ltd. provides oil and exploration services. It manufactures and markets petrochemical products including olefins, aromatics, polyethylene, fluids, synthetic rubber, plasticizers, synthetic lubricant basestocks, zeolite catalysts, polypropylene plastics and wide variety of specialty products. The company is headquartered in London, UK.

Andeavor engages in the refining and marketing of petroleum products. It operates through the following segments: Refining, Logistics, and Marketing. The Refining segment buys and refines crude oil and other feed stocks into transportation fuels, such as gasoline and gasoline blend stocks, jet fuel and diesel fuel, as well as other products, including heavy fuel oils, liquefied petroleum gas and petroleum coke for sale in bulk markets to a wide variety of customers within Andeavor's markets. The logistics segment includes crude oil and natural gas gathering assets, natural gas and natural gas liquid processing assets, and crude oil and refined products terminalling, transportation and storage assets acquired from Andeavor and third parties. The Marketing segment sells transportation fuels through branded and unbranded channels. Its brand portfolio includes ARCO, Shell, Exxon, Mobil, USA Gasoline, Rebel, and Tesoro. The company was founded by West V. Robert, Jr. in 1964 and is headquartered in San Antonio, TX.