Custom Truck One Source shares jumped 13.9% to $10.26 on Tuesday, after the heavy-equipment rental and distribution company raised its full-year earnings guidance for the third time this year alongside a reduction in net leverage. The filing confirming the quarter is dated 26 October 2026, and the share reaction came in the following session, so the event itself is confirmed; exactly how the market weighted each line of the release cannot be separated from the data available.
Why the shares moved
The exhibit filed with Custom Truck’s results showed the company increasing its full-year Adjusted EBITDA guidance to a range of $447.5 million to $460 million, up from $437.5 million to $455 million, and lifting its SER segment revenue outlook to $870 million to $890 million, from $850 million to $875 million. Chief executive Ryan McMonagle pointed to record demand across utility transmission and distribution markets. The company also reduced its net leverage ratio to 3.7 times, down from 4.5 times a year earlier. These are the kind of forward-looking changes that tend to move a stock on a results day, rather than the quarter’s own backward-looking numbers.
Third-quarter revenue of $495.2 million, up 2.7% year on year, was the figure a report said fell short of Wall Street’s forecast. Earnings per share matched estimates, according to a report on the same release. The size of the reaction suggests the market responded more to the raised guidance and lower leverage than to the quarter’s own revenue line.
How big a move this is
The 13.9% gain is roughly 4.8x the size of Custom Truck’s typical daily move over the past year, which has averaged 2.9%. It is the stock’s largest gain in this direction since 5 March 2025. Shares had closed the prior session at $9.01.
Market and industry context
The broader market was calmer. The S&P 500 rose 0.7% over the same session, and other covered trading and distribution companies rose a median 0.3%. Custom Truck’s reaction was specific to the company rather than a sector-wide or market-wide move. Trading volume ran at 0.7x the stock’s 30-day average, below what is typical for a day carrying this much share-price movement.
The other reading
The strongest alternative reading is that the rally overstates the quarter itself. Revenue missed Wall Street’s forecast, and the company’s own release flagged more than $20 million of third-party STEM equipment deliveries that shifted out of the quarter because of a vendor recall and hail damage at its Kansas City site. Levered free cash flow guidance for 2026 was cut to “slightly positive” from a prior forecast of more than $50 million, as the company redirects cash toward fleet investment. On that reading, the move reflects confidence in 2027 earnings from that investment rather than strength in this quarter on its own terms.
What it means for value
Operating margin over the same period was 8.2%, up 1.0 percentage points year on year, and net margin reached 1.4%. The gap between an improving operating margin and a falling free cash flow margin shows the cash cost of that fleet spending, even as reported profitability improves. These are model values under stated assumptions, not a comparison with the share price.
What comes next
Custom Truck has guided to fourth-quarter revenue and Adjusted EBITDA growth both year on year and sequentially, with the shifted STEM deliveries expected to ship in that quarter. Management has said it expects net leverage to remain meaningfully below four times by year-end, working toward a target below three times in 2027. Those targets, not Tuesday’s share reaction, are the next test of whether this quarter’s guidance increase holds.