Alon USA Energy

Valero Energy is one of the largest independent refiners in the United States. It operates 15 refineries, with a total throughput capacity of 3.2 million barrels a day in the US, Canada, and the United Kingdom. Valero also owns 12 ethanol plants with capacity of 1.6 billion gallons a year and holds a 50% stake in Diamond Green Diesel, which can produce 1.2 billion gallons per year of renewable diesel.

American Power Group Corp delivers alternative fuel solutions to the heavy-duty truck and stationary power generation industries. The company operates its business through two segments: Dual Fuel Conversions and Natural Gas Liquids Operations. The company offers vehicular and stationary solutions, and dual fuel conversions for marine, mining and rail applications. The company also provides flare capture and recovery services to oil and gas production companies. The geographic markets of the company include the United States and Canada. Geographically, the company receives maximum revenue from the United States.

Shell Oil Company is an oil and gas company that explores and produces energy products.