Delek US Holdings, Inc. is a diversified downstream energy company. The Company is focused on petroleum refining; the transportation, storage and wholesale distribution of crude oil, intermediate and refined products; and convenience store retailing. It has three segments. Refining segment processes crude oil and other feedstocks for the manufacture of transportation motor fuels, including various grades of gasoline, diesel fuel and aviation fuel, asphalt and other petroleum-based products. Logistics segment owns and operates crude oil, refined products and natural gas logistics and marketing assets, as well as water disposal and recycling assets for the use in providing logistics, marketing, disposal and recycling services to customers; primary customer is Delek, inter-company transactions are eliminated in consolidation. Retail segment offers various grades of gasoline and diesel under the DK or Alon brand name, primarily sourced by its Big Spring refinery.