Established in 1988, Transport Investments is one of the largest privately owned trucking groups in the United States. It owns and operates various transportation companies, including American Transport, Aetna Freight Lines, Greentree Transportation Company, Marathon Transport and TII Logistics. American Transport is a trucking company that offers a variety of freight services for commercial and industrial clients. It maintains operations in more than 45 U.S. states. The company specializes in the transportation of steel, lumber, building products, machinery, equipment and food. It operates a fleet of over 340 trucks, flatbeds and vans, as well as nearly 85 terminals. Transport Investments additionally operates Northern Hills Transport, Julian Transport and Cargo Carriers.

Aetna Freight Lines Inc

American Wind Transport Group, LLC

Parks Corporation

Airside Business Park LP