Chester J. Kuchta

Petroplus Holdings AG engages in crude oil refinery and wholesale marketing of refined petroleum products. It operates through the Refining segment, which includes refining and wholesale marketing operations. It produces and distributes finished products such as gasoline, diesel, heating oil, light and heavy fuel oils, aviation fuels, gasoline components, special purpose liquid fuels, and other petroleum products. Petroplus Holdings AG was founded by Thomas D. O'Malley and Patrick Monteiro de Barros on February 20, 2006 and is headquartered in Zug, Switzerland.

The Premcor Refining Group, Inc. provides petroleum refining services. It supplies unbranded transportation fuels, heating oil, petrochemical feedstocks, petroleum coke, and other petroleum products. The company is headquartered in San Antonio, TX.

Part of Marathon Petroleum Corp., Northern Tier Energy GP LLC provides oil and gas refining, retail and transportation services. The company is based in Ridgefield, CT. David L. Lamp has been the CEO of the company since 2014.

Northern Tier Energy LLC engages in oil and gas refining, retail, and pipeline operations. Its products include gasoline, diesel, jet fuel, and asphalt which are then marketed to resellers and consumers. The company was founded on June 23, 2010 and is headquartered in Phoenix, AZ.

Northern Tier Energy LP engages in refining, retail, and logistics operations. The company was founded by Mario E. Rodriguez and Hank Kuchta on October 21, 2011 and is headquartered in Tempe, AZ.