Marten Transport, Ltd. operates as a temperature-sensitive truckload carrier for shippers in the United States, Canada, and Mexico. It operates through four segments: Truckload, Dedicated, Intermodal, and Brokerage. The Truckload segment transports food and other consumer packaged goods that require a temperature-controlled or insulated environment. The Dedicated segment offers customized transportation solutions for individual customers' requirements using temperature-controlled trailers, dry vans, and other specialized equipment. The Intermodal segment transports customers' freight utilizing its temperature-controlled trailers on railroad flatcars for portions of trips, as well as using tractors and contracted carriers. The Brokerage segment develops contractual relationships with and arranges for third-party carriers to transport freight for customers in temperature-controlled trailers and dry vans. As of December 31, 2020, the company operated a fleet of 3,331 tractors, including 3,188 company-owned tractors and 143 tractors supplied by independent contractors. Marten Transport, Ltd. was founded in 1946 and is headquartered in Mondovi, Wisconsin.