Douglas Aron

Frontier Oil Corp. is an energy company, which is engaged in crude oil refining and wholesale marketing of refined petroleum products. The company operates refineries in Cheyenne, Wyoming and El Dorado, Kansas. Frontier Oil purchases crude oil to be refined and markets the refined petroleum products produced, including various grades of gasoline, diesel fuel, jet fuel, asphalt, chemicals and petroleum coke. The Cheyenne Refinery has a permitted crude oil capacity of 52,000 bpd and markets its refined products primarily in the Eastern slope of the Rocky Mountain region, which encompasses Eastern Colorado, Eastern Wyoming and Western Nebraska. It has a coking unit, which allows the refinery to process heavy crude oil for use as a feedstock. The El Dorado Refinery is in the Plains States and the Rocky Mountain region with crude oil capacity of 135,000 bpd. It markets gasoline and diesel in Denver and throughout the Plains States. Frontier Oil also owns Ethanol Management Co., a products terminal and blending facility located near Denver, Colorado. The company was founded in 1949 and is headquartered in Houston, TX.

Amegy Bank NA offers banking products and services. It specializes in small business banking; treasury management and investment services for companies, small businesses, private financial management and trust services for families and individuals. The firm also offers retail and mortgage banking services, payables and receivables solutions, and risk and wealth management services. The company was founded by Ernest H. Cockrell in 1990 and is headquartered in Houston, TX.

Part of HF Sinclair Corp, Holly Logistic Services LLC is a company that provides logistics services. The company is based in Dallas, TX. Michael C. Jennings has been the CEO of the company since 2011.

HollyFrontier Corp. is an independent petroleum refiner and marketer. It specializes in gasoline, diesel fuel, jet fuel, and modified asphalt. The firm operates through the following segments: Refining, Lubricants and Specialty Products, and Holly Energy Partners LP (HEP). The Refining segment includes the operations in its El Dorado, Tulsa, Navajo, Cheyenne, and Woods Cross Refineries. The Lubricants and Specialty Products segment offers base oil production activities, by-product sales to third parties, and intra-segment base oil sales, which includes the purchase of base oils and the blending, packaging, marketing and distribution, and sales of finished lubricants and specialty products to third parties. The HEP segment relates to all of the operations of HEP. The company was founded in 1947 and is headquartered in Dallas, TX.

Holly Energy Partners LP engages in the business of operating a system of petroleum product and crude pipelines, storage tanks, distribution terminals, and loading rack facilities. It operates through the Pipelines and Terminals, and Refinery Processing Unit segments. The Pipelines and Terminals segment includes petroleum products, crude pipelines and terminal, tankage, and loading rack facilities. The company was founded in 2004 and is headquartered in Dallas, TX.

Part of HF Sinclair Corp, HEP Logistics Holdings LP functions as an investment holding company. The company is based in Dallas, TX.