Comfort Systems USA stock: Q3 revenue jumps as backlog hits record

Comfort Systems USA reported strong third-quarter results on October 22, 2026, with revenue, profit and cash generation well above the year-earlier period. The company’s release said demand remained robust and that execution across its commercial, industrial and institutional building-services operations supported the performance.

Revenue for the quarter ended September 30 rose to 3.77 billion US dollars from 2.45 billion US dollars a year earlier. Net income increased to 489.0 million US dollars from 291.6 million US dollars, while diluted earnings per share advanced to 13.91 US dollars from 8.25 US dollars. The figures were reported by Comfort Systems USA in its investor release.

Record Backlog Supports Visibility

Operating cash flow reached 1.01 billion US dollars in the quarter, compared with 553.3 million US dollars in the prior-year quarter. Free cash flow was 805.6 million US dollars, supported by operating cash generation after capital spending and asset-sale proceeds.

Backlog stood at 17.81 billion US dollars on September 30, up from 14.06 billion US dollars at the end of June and 9.38 billion US dollars a year earlier. On a same-store basis, backlog rose to 17.39 billion US dollars from 9.38 billion US dollars. Chief Executive Officer Brian Lane said sequential backlog growth reached 3.8 billion US dollars and the year-over-year increase exceeded 8.0 billion US dollars.

Lane said the company was well positioned to grow organically through year-end and in 2027 while maintaining high profitability and solid ongoing cash flow. The statement is an outlook rather than a guarantee, and the company highlighted execution, labor, project costs, customer payments and backlog conversion among the factors that can affect future results.

Strong Results Raise The Bar

The quarter gives investors a combination of current earnings strength and a larger contracted-work base. The key question is whether Comfort Systems USA can convert the expanded backlog into revenue and cash flow while preserving margins as project volume grows. The company’s nine-month revenue reached 9.90 billion US dollars, compared with 6.46 billion US dollars in 2025, while nine-month operating cash flow rose to 2.54 billion US dollars from 717.8 million US dollars.

Comfort Systems USA stock traded at 919.75 euros on Lang & Schwarz at 12:52 CET on Monday, November 9. Investors can follow the real-time quote of Comfort Systems USA stock.

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