Daimler Truck North America, a Daimler Truck AG company, is the largest heavy-duty truck manufacturer in North America and a leading producer of medium-duty trucks and specialized commercial vehicles. Headquartered in Portland, Oregon, Daimler Truck North America manufactures, sells and services several renowned commercial vehicle brands including Freightliner Trucks, Western Star Trucks, Thomas Built Buses, and Freightliner Custom Chassis. Through the company's affiliates, Daimler Truck North America is also a leading provider of heavy-and medium-duty diesel engines and other components. The company's strategic partners in the North American commercial vehicles market include Daimler Truck Financial, TravelCenters of America and Petro Truck Centers.