Custom Truck One Source Inc is a one-stop-shop provider of specialty equipment in the electric utility transmission and distribution, forestry, telecom, waste management, rail, and infrastructure end-markets in North America. The company's segment includes Equipment Rental Solutions (ERS), Truck and Equipment Sales (TES), and Aftermarket Parts and Services (APS). It generates maximum revenue from the TES segment. Geographically, it derives a majority revenue from the United States.