Delek US Holdings is an American company primarily involved in the energy sector. It operates through various segments, including refining, logistics, and retail. The company owns and operates refineries that convert crude oil into gasoline and other petroleum products, serving both wholesale and retail markets. In addition to refining, Delek US Holdings has a significant presence in the logistics sector, managing pipelines and storage facilities. The company also operates a network of convenience stores under the MAPCO brand, providing fuel and other products to consumers across the southeastern United States.