HollyFrontier Corporation (NYSE: HFC) is an independent petroleum refiner in the United States with operations throughout the mid-continent, southwestern and Rocky Mountain regions. The Company is headquartered in Dallas, Texas and operates five complex refineries with 457,000 barrels per day of crude oil processing capacity. Subsidiaries of HollyFrontier produce and market gasoline, diesel, jet fuel, asphalt, heavy products and specialty lubricant products. Additionally, HollyFrontier owns Petro-Canada Lubricants Inc. whose Mississauga, Ontario facility produces 15,600 barrels per day of base oils and other specialized lubricant products. The Company also owns a 36% interest (including a 2% general partner interest) in Holly Energy Partners, L.P. (NYSE: HEP).

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