Direct Answer
SEC EDGAR classifies Comfort Systems USA under SIC code 1731 (Electrical Work). Among Swoopr's S&P 500 Equal Weight companies, 3 others share that classification; by latest reported revenue, Comfort Systems USA ranks 4 of 4. A filing classification is a starting point: a company's real competitors depend on its segments, which its 10-K describes.
How Does Comfort Systems USA Compare With Its Peers?
| Company | Revenue (latest FY) | Revenue growth | Operating margin | Net margin |
|---|---|---|---|---|
| Quanta Services (PWR) | $28.5 billion FY2025 | 20.3% | 5.7% | 3.7% |
| Emcor (EME) | $17.0 billion FY2025 | 16.6% | 10.1% | 7.5% |
| IES Holdings Inc. (IESC) | $3.4 billion FY2025 | 16.9% | 11.4% | 9.1% |
| Comfort Systems USA (FIX) | $1.8 billion FY2025 | -73.9% | 11.4% | 55.8% |
Revenue growth compares each company's latest fiscal year with the one before. Fiscal years do not always end on the same date, so treat close comparisons with care.
Where These Numbers Come From
Every figure on this page is a value Comfort Systems USA reported in its own SEC filings, read from the SEC's XBRL data (accession 0001104659-26-047689 for fiscal year 2025). Ratios are computed from those reported values. Figures were retrieved on October 7, 2026; a later amendment or a new annual report can change them, and the filing itself always takes precedence over this summary.
Each fiscal year is labeled by the calendar year in which it ended, so a company that names the same period differently in its own filings (many retailers whose year ends in January) may use another label. A year is left out of the table when the SEC data set holds no value for it. A figure shown as "Not reported" means the company did not file a value under the standard tag Swoopr reads, not that the amount was zero. This page is educational and describes reported history only; it is not a forecast or a recommendation.
Frequently Asked Questions
Who are Comfort Systems USA's competitors?
Companies sharing Comfort Systems USA's SEC classification (SIC code 1731 (Electrical Work)) include Quanta Services (PWR), Emcor (EME), IES Holdings Inc. (IESC). Its 10-K names the competitors it considers most relevant.
How does Comfort Systems USA compare with its peers on margins?
Comfort Systems USA's fiscal 2025 operating margin was 11.4%, against a peer median of 10.1%.
How are these peers chosen?
By the SEC Standard Industrial Classification code each company files under, within Swoopr's S&P 500 Equal Weight company set, falling back to the two-digit major group when fewer than two companies share the exact code. Classification codes are broad, so read the peer list as a screen, not a verdict.