EXHIBIT 99.1 Custom Truck One Source, Inc. Reports Record Results for Full-Year 2023 KANSAS CITY, Mo, March 7, 2024 – (BUSINESS WIRE) – Custom Truck One Source, Inc. (NYSE: CTOS), a leading provider of specialty equipment to the electric utility, telecom, rail, and other infrastructure-related end markets, today reported financial results for the fourth quarter and full year ended December 31, 2023. CTOS Fourth-Quarter and Full-Year Highlights • Total quarterly revenue of $521.8 million and annual revenue o ...