Comfort Systems USA (FIX) Earnings: Q3 2026 Results

The quarter ended September 30, 2026 and Comfort Systems USA published the results on October 22, 2026. Revenue and diluted EPS are shown against Q3 2025, the same quarter a year earlier, which takes seasonal swings out of the comparison.

• Revenue includes acquisitions made since Q3 2025: Feyen Zylstra and Meisner (October 1, 2025), Hunt (May 1, 2026), and Boys Electrical and a modular company in Texas (August 1, 2026). Comfort Systems USA said acquisitions added 7.4 points of the quarter's revenue growth.
• Comfort Systems USA reports GAAP EPS only. It publishes adjusted EBITDA and free cash flow but no adjusted EPS.

Source: Comfort Systems USA Q3 2026 results, October 22, 2026. Also in the Form 10-Q for the quarter ended September 30, 2026. Figures as reported; checked against the release on November 10, 2026.

How Comfort Systems USA splits revenue in its own release, under its own labels, for Q3 2026 against Q3 2025. Indented lines are parts of the line above them.

• Comfort Systems USA's Mechanical revenue was $2.6 billion in Q3 2026, up 43% from $1.8 billion in Q3 2025, 69% of total revenue.
• Comfort Systems USA's Electrical revenue was $1.2 billion in Q3 2026, up 85% from $641 million in Q3 2025, 31% of total revenue.

Segment lines are the figures writers cite most often, because they show where the growth in a quarter came from. Companies redraw their segments from time to time and restate the prior year to match, so a year-ago figure here can differ from the one printed a year ago. When that has happened, the note above says so.

From the earnings release

Comfort Systems USA gives no numeric revenue or EPS guidance in its release. The quote is from CEO Brian Lane.

In its Q3 2026 release, Comfort Systems USA said:

“we believe that through year end and for 2027 we are well-positioned to grow organically, and to maintain high levels of profitability and solid ongoing cash flow.”

Source: Comfort Systems USA Q3 2026 release, Oct 22, 2026.

This is the company's own guidance as of Oct 22, 2026, quoted as given. Walnut does not make forecasts of its own. Analyst estimates for the coming quarters are on the FIX forecast page.

Revenue and diluted EPS for the last 5 quarters. Each date links to that quarter's release.

GAAP revenue and GAAP diluted EPS, each as first reported in that quarter's release.

We do not hold a confirmed date for Comfort Systems USA's next report. Companies post the date on their investor relations site a few weeks ahead, usually with the time of the conference call.

Each quarter keeps its own page with the figures as reported, so a link to one stays pointed at the same numbers after the next report.

• Q3 2026 (this page), reported Oct 22, 2026

Comfort Systems USA is a mechanical and electrical contractor with two reportable segments. In Q3 2026 Mechanical brought in $2,582.9 million, 68.6% of revenue, and Electrical $1,183.4 million, 31.4%. A year earlier the split was 73.9% and 26.1%. Total revenue rose 53.7% to $3.77 billion. (Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Technology customers, which Comfort Systems USA says means data centers in particular, were $2,290 million of revenue, or 60.8%, up from 45.8% a year earlier. Manufacturing was the next largest customer type at 16.8%, then healthcare at 6.3% and education at 4.6%. New construction made up 76.2% of revenue, against 65.2% in Q3 2025. (Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Most of the growth came from operations Comfort Systems USA already owned. Of the 53.7% increase, 46.3% came from same-store activity and 7.4% from acquisitions. Mechanical revenue rose 42.7%, led by the technology sector at one of its Texas operations ($312.0 million) and its large Texas modular operation ($177.8 million). Electrical revenue rose 84.8%, with $174.1 million from acquisitions and $300.2 million of same-store growth at its Texas electrical operation. (Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Backlog reached $17.81 billion at September 30, 2026, against $14.06 billion three months earlier and $9.38 billion a year earlier. Same-store backlog rose $8.01 billion, or 85.4%, over the year, mostly from technology work at its large Texas modular operation ($2.72 billion) and its Texas electrical operation ($2.64 billion). The 10-Q says it expects to recognize about 65-75% of remaining performance obligations over the next 12 months. (Comfort Systems USA Q3 2026 release, Oct 22, 2026; Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Comfort Systems USA reports GAAP EPS only. Q3 2026 diluted EPS was $13.91, against $8.25 a year earlier, on net income of $489.0 million. Gross margin was 24.8% in both quarters; the 10-Q notes the year-ago quarter had included $15.5 million of previously unrecognized revenue recognized when a customer emerged from bankruptcy. (Comfort Systems USA Q3 2026 release, Oct 22, 2026; Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

SG&A fell to 8.3% of revenue from 9.4%, which lifted the operating margin to 16.6% from 15.5%. Interest income, net rose to $14.5 million from $3.4 million, which the 10-Q puts down to a higher average cash balance. The provision for income taxes was $146.0 million; for the first nine months the effective tax rate was 22.7%, against 20.9% a year earlier. (Comfort Systems USA Q3 2026 release, Oct 22, 2026; Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Diluted shares were 35,152 thousand, against 35,365 thousand a year earlier. In the first nine months of 2026 Comfort Systems USA repurchased 0.2 million shares for $349.1 million, at an average price of $1,643.85. The quarterly dividend was $0.900 a share, up from $0.500. (Comfort Systems USA Q3 2026 release, Oct 22, 2026; Comfort Systems USA Form 10-Q, Q3 2026, Oct 22, 2026)

Diluted EPS divides net income by the weighted average number of shares outstanding in the quarter, plus the shares that options and other equity awards could add. Buybacks shrink that count and lift EPS for the same profit; share issuance and stock awards enlarge it.

Comfort Systems USA does not give numeric revenue or EPS guidance in its release. CEO Brian Lane said the company believes that through year end and for 2027 it is well-positioned to grow organically and to maintain high levels of profitability and solid ongoing cash flow. (Comfort Systems USA Q3 2026 release, Oct 22, 2026)

The release adds that its comments on future revenue and operating results cover existing operations only and do not include the potential impact of any future acquisitions. (Comfort Systems USA Q3 2026 release, Oct 22, 2026)

A consensus figure is the average of the models published by the analysts who cover Comfort Systems USA, collected by a data provider and revised up to the day of the report. A quarter that lands above it says how expectations were set as much as how the business did, and the share price on the day also reflects the guidance and the lines no consensus covers.

The consensus figures on this page are Yahoo Finance's, as pulled on the date shown. Each comes with the number of analysts behind it; the smaller that number, the more one revised estimate can move the average.

The figures below are the ones Comfort Systems USA's own release and filings put weight on for Q3 2026, with the latest reported value for each.

What the quarter means for a holding is a separate question from what it reported. The case for and against owning FIX is on is FIX a buy or a sell?, what analysts expect next is on the FIX forecast, and what the company does is on the Comfort Systems USA (FIX) stock page.

Every number on this page can be traced to a document Comfort Systems USA published. Checking one takes a couple of minutes, and it is worth doing before you quote a figure anywhere.

• The results release is the document linked in the source line above. Companies publish it on their investor relations site at the moment results go out, and it carries the headline tables: revenue, operating income, net income and EPS for the quarter and the year-ago quarter.
• The same release is filed with the SEC as Exhibit 99.1 to a Form 8-K under Item 2.02, usually on the day of the report. The SEC copy does not change after the fact, which makes it the safer thing to link when you cite a number.
• The quarterly report (Form 10-Q) follows within a few weeks and carries the full financial statements, the segment note and management's discussion of what changed. The fourth quarter is covered by the annual report (Form 10-K) instead.
• Restated comparisons are flagged in the notes on this page. When a company redraws its segments or changes how it adjusts EPS, it restates the year-ago column, so the year-ago figure in a new release can differ from the one printed a year ago. This page always uses the comparison in the newer release, because that is the like-for-like one.

A walk-through of every line in a release, with what each one tells you, is in how to read an earnings report.