Custom Truck One Source Inc (CTOS) experienced a significant pre-market surge of 6.61% on Tuesday, as investors reacted positively to the company's latest financial performance.

The movement follows the company's release of its first quarter 2026 results, which showed marked improvement across key metrics. For the quarter ended March 31, 2026, Custom Truck One Source reported sales of US$137.22 million compared to US$116.26 million in the same period last year, while total revenue increased to US$461.62 million from US$422.23 million.

Notably, the company substantially reduced its net loss to US$4.1 million from US$17.79 million a year earlier, with basic and diluted loss per share improving to US$0.02 from US$0.08. This improved financial performance appears to have captured market attention, building on recent positive momentum in the stock.