Comfort Systems revenue hits $3.77 billion as backlog swells to $17.8 billion

Comfort Systems USA keeps adding work faster than it can finish it. The mechanical and electrical contractor's backlog climbed to $17.81 billion at the end of September, nearly double the $9.38 billion of a year earlier.

Third-quarter revenue rose to $3.77 billion from $2.45 billion, and net income reached $489.0 million, or $13.91 per diluted share, compared with $291.6 million, or $8.25 a share, a year ago, according to its earnings release filed with an 8-K on Thursday.

Operating cash flow was $1.01 billion in the quarter, compared with $553.3 million a year earlier.

Backlog builds again

Backlog rose $3.8 billion from $14.06 billion at the end of June. On a same-store basis, backlog grew to $17.39 billion from $9.38 billion.

"Relentless demand, together with our competence and reputation, produced sequential backlog growth of $3.8 billion," CEO Brian Lane said in the release. He said the company believes it is well positioned to grow organically through year-end and in 2027.

For the first nine months of the year, net income was $1.30 billion, or $36.94 a share, on revenue of $9.90 billion.

In a separate 8-K the same day, the company said longtime CFO Bill George will retire after the filing of its 2026 annual report, with Chief Accounting Officer Julie Shaeff set to succeed him.

By the numbers

• Q3 revenue: $3.77 billion, vs. $2.45 billion
• Diluted EPS: $13.91, vs. $8.25
• Operating cash flow: $1.01 billion
• Backlog: $17.81 billion, vs. $9.38 billion a year ago

Sources

1. Comfort Systems USA, Inc., Form 8-K (Item 2.02) with Exhibit 99.1 earnings release dated Oct. 22, 2026, accession 0001104659-26-118156
2. Comfort Systems USA, Inc., Form 8-K (Items 5.02, 7.01) dated Oct. 22, 2026, accession 0001104659-26-118149

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