CVR Energy, a refining company owned by Carl Icahn, is among the bidders for shares in the parent company of Citgo, PDV Holding, Reuters has reported, citing unnamed sources. CVR Energy operates two refineries, one in Kansas and one in Oklahoma. Carl Icahn holds a 66% stake in the company. The refiner is working with Wells Fargo to raise the money for its bid, the Reuters sources said. Citgo is the seventh-largest refiner in the United States with a total capacity topping 800,000 barrels per day (bpd). It has plants in Texas, Louisiana, and…