CVR Energy Inc is a holding company that engages in petroleum refining and nitrogen fertilizer manufacturing through its subsidiaries. Subsidiaries include several complex, full-coking crude oil refineries, along with a crude oil gathering system, pipelines and storage tanks, and marketing and supply. The company's refineries can process blends of a variety of crude oil ranging from heavy sour to light sweet crude oil. Crude oil for CVR's refineries is supplied through its wholly-owned gathering system and pipeline. From its refineries, CVR supplies products through tanker trucks directly to customers located in close geographic proximity and customers at throughput terminals. The company's customers include retailers, railroads, and farm cooperatives.