Based in Bellevue, Washington, PACCAR is the parent company of the Kenworth, Peterbilt, DAF and Leyland brands.  Key locations include Kenworth Division headquarters in Kirkland WA, Peterbilt Division headquarters in Denton TX, PACCAR Parts headquarters in Renton WA, plus technical and manufacturing sites in the US, Canada, Mexico, and Australia.

Based in Portland OR, DTNA is the parent company of Freightliner, Western Star, Thomas Built and other brands.  DetroitTM, formerly Detroit Diesel, is an affiliate of DTNA.  Key locations also include corporate and business unit headquarters in Portland OR and other locations in the US, as well as manufacturing sites in the US, Canada, and Mexico.

Based in Lisle, IL, Navistar is the parent company of the International truck and IC Bus brands, and a member of the global Traton (Volkswagen) family of commercial vehicles. Key locations include corporate and business unit headquarters in Lisle, IL plus manufacturing sites in the US and Mexico. Navistar offers one of the world's most trusted truck brands.

Based in Greensboro, NC, Volvo Trucks USA is the parent company of the Volvo and Mack truck brands. Key locations include business headquarters, technical, and manufacturing sites up and down the East coast. Volvo is one of the largest truck brands in the world, making vehicles that are sold and serviced in more than 140 countries. They specialize in quality and safety.