Dairy state-based Marten Transport hauls more than cheese. The long-haul truckload carrier uses refrigerated and insulated trailers to convey a variety of food products and other temperature-sensitive materials; it also hauls dry freight. Marten Transport operates throughout the US and in parts of Canada; its average haul is about 650 miles. The company's fleet includes about 2,150 tractors and 3,900 trailers. In addition to freight transportation, the company provides logistics services. Among Marten Transport's largest customers are food giants General Mills and Kraft, which account for 18% and 10%, respectively, of its total revenue each year.