Shaffer Trucking is a major U.S. refrigerated carrier specializing in temperature-sensitive freight. Founded in Pennsylvania in 1937, the company originally became known for transporting products such as chocolate. Crete Carrier Corporation acquired Shaffer Trucking in 1974 and later combined it with Sunflower Carriers to build a large temperature-controlled transportation division. Today, Shaffer provides national, regional, dedicated, and local freight services throughout the continental United States.

Maverick Transportation is a North American trucking company founded in 1980 and headquartered in North Little Rock, Arkansas. Operating more than 1,600 trucks, the carrier specializes in flatbed, glass, marine, dedicated, final-mile, and specialized freight transportation. Maverick serves commercial shippers across the United States and Canada, with a strong emphasis on safe freight handling, professional drivers, modern equipment, shipment visibility, and dependable over-the-road transportation.

Melton Truck Lines is a Tulsa, Oklahoma-based transportation company specializing in flatbed, step-deck, and over-the-road freight. Founded by Bert and Gladys Melton in Crossett, Arkansas, in 1954, the business began with two trucks hauling lumber and roofing materials. It has since developed into one of North America’s largest flatbed carriers, serving shippers throughout the United States, Canada, and Mexico with air-ride equipment and specialized freight services.

TMC Transportation is an employee-owned American trucking and logistics company specializing in flatbed, open-deck, specialized, truckload, and supply-chain transportation. It was founded in 1972 after Harrold Annett purchased the dormant Mickow Corporation and began operations with six trucks. Headquartered in Des Moines, Iowa, TMC has developed into one of North America’s largest privately held flatbed carriers, serving commercial shippers across the United States and Canada.

Stevens Transport is a family-owned transportation and logistics company specializing in temperature-controlled freight across the United States, Canada, and Mexico. Founded by Steve Aaron in Dallas, Texas, in 1980, the company has grown from a refrigerated trucking operation into a major multimodal provider offering truckload, dedicated, regional, intermodal, international, tanker, expedited, and third-party logistics services. Its modern fleet and tracking technology help businesses monitor sensitive and time-critical freight throughout the delivery process.

KLLM Transport Services is a major North American temperature-controlled truckload carrier founded in 1962. Headquartered in Richland, Mississippi, KLLM transports refrigerated and dry freight throughout the contiguous United States, with cross-border service into and out of Mexico. Its transportation network includes over-the-road, regional, dedicated, intermodal, expedited, and third-party logistics services for food producers, retailers, manufacturers, and other commercial shippers.

Bennett Motor Express is a specialized trucking and freight transportation company headquartered in McDonough, Georgia. Founded in 1974, it became the largest operating company within the Bennett Family of Companies. Bennett Motor Express transports flatbed, step-deck, oversized, heavy-haul, government, aerospace, energy, and other specialized freight throughout North America. Its services are supported by an extensive network of freight agents, experienced owner-operators, specialized equipment, shipment-management technology, and logistics professionals.

USA Truck is a North American transportation and logistics company founded in 1983 and headquartered in Van Buren, Arkansas. It provides truckload, dedicated fleet, intermodal, logistics, and cross-border transportation services throughout the United States, Canada, and Mexico. After operating under DB Schenker and DSV ownership, USA Truck returned to private Arkansas-based ownership under UTAC, LLC in January 2026, beginning a new chapter in its four-decade history.

TransAm Trucking is a U.S. transportation company specializing in long-haul and temperature-controlled freight services. Founded in 1987 and headquartered in Olathe, Kansas, the company provides over-the-road, regional, dedicated, and local transportation solutions. TransAm uses modern fleet technology to monitor trailer locations, protect temperature-sensitive cargo, optimize routes, and communicate shipment information. Its services primarily support commercial shippers moving refrigerated, frozen, and other time-sensitive freight throughout the United States.

Frontline Freight is a U.S.-based freight carrier specializing in less-than-truckload transportation, particularly shipments moving to and from Southern California. Established in 1989, the company expanded its network through relationships with regional and national carriers, offering LTL, truckload, intermodal, air freight, flatbed, volume and Canadian shipping services. Frontline Freight was acquired by STG Logistics in 2023 and now operates as part of the company’s nationwide STG LTL transportation network.