2. Marathon Petroleum ( MPC) Company Profile: Marathon Petroleum is a supplier of gasoline and distillates to resellers and consumers. Its refining, marketing and transportation operations are concentrated primarily in the Midwest, Gulf Coast and Southeast regions of the U.S. SAC Capital's Investment: The hedge fund purchased 3.4 million shares of Marathon Petroleum last quarter. The stake was worth $91 million as of Sept. 30. Share Price Performance: Marathon Petroleum shares have fallen 13% since its July split from its parent company. However, shares have rallied a whopping 35% since the end of the third quarter.