# Comfort Systems USA Inc: overview

FIX · NYSE · CIK 1035983 · [Industrials](/sectors/industrials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/fix.md) · [Financials](/companies/fix/financials.md) · [Filings](/companies/fix/filings.md) · [Insiders](/companies/fix/insiders.md)

Latest reported revenue: [$3.77bn](/filings/0001104659-26-118159.md) for Q3 FY2026, three months to 2026-09-30, from the 10-Q filed Oct 22, 2026 (XBRL us-gaap:Revenues, accession 0001104659-26-118159).

## Last eight quarters

| Line item | Unit | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) | Q2 FY2026 (2026-06-30) | Q3 FY2026 (2026-09-30) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [1,868 d](/filings/0001104659-26-017530.md) | [1,831](/filings/0001104659-26-047689.md) | [2,173](/filings/0001104659-26-086258.md) | [2,451](/filings/0001104659-26-118159.md) | [(4,624) d](/filings/0001104659-26-047689.md) | [2,865](/filings/0001104659-26-047689.md) | [3,266](/filings/0001104659-26-086258.md) | [3,766](/filings/0001104659-26-118159.md) |
| Gross margin | % | [23.2% d](/filings/0001104659-26-017530.md) | [22.0%](/filings/0001104659-26-047689.md) | [23.5%](/filings/0001104659-26-086258.md) | [24.8%](/filings/0001104659-26-118159.md) | [24.2% d](/filings/0001104659-26-047689.md) | [26.3%](/filings/0001104659-26-047689.md) | [25.9%](/filings/0001104659-26-086258.md) | [24.8%](/filings/0001104659-26-118159.md) |
| Operating margin | % | [12.1% d](/filings/0001104659-26-017530.md) | [11.4%](/filings/0001104659-26-047689.md) | [13.8%](/filings/0001104659-26-086258.md) | [15.5%](/filings/0001104659-26-118159.md) | [14.7% d](/filings/0001104659-26-047689.md) | [17.0%](/filings/0001104659-26-047689.md) | [17.1%](/filings/0001104659-26-086258.md) | [16.6%](/filings/0001104659-26-118159.md) |
| Net margin | % | [7.8% d](/filings/0001104659-26-017530.md) | [9.2%](/filings/0001104659-26-047689.md) | [10.6%](/filings/0001104659-26-086258.md) | [11.9%](/filings/0001104659-26-118159.md) | [(7.2%) d](/filings/0001104659-26-017530.md) | [12.9%](/filings/0001104659-26-047689.md) | [13.5%](/filings/0001104659-26-086258.md) | [13.0%](/filings/0001104659-26-118159.md) |
| Diluted EPS | $ per share | not reported | [4.75](/filings/0001104659-26-047689.md) | [6.53](/filings/0001104659-26-086258.md) | [8.25](/filings/0001104659-26-118159.md) | not reported | [10.51](/filings/0001104659-26-047689.md) | [12.53](/filings/0001104659-26-086258.md) | [13.91](/filings/0001104659-26-118159.md) |
| Free cash flow | $m | [170 d](/filings/0001104659-26-017530.md) | [(110)](/filings/0001104659-26-047689.md) | [221 d](/filings/0001104659-26-086258.md) | [518 d](/filings/0001104659-26-118159.md) | [402 d](/filings/0001104659-26-017530.md) | [241](/filings/0001104659-26-047689.md) | [998 d](/filings/0001104659-26-086258.md) | [800 d](/filings/0001104659-26-118159.md) |

- Revenue. XBRL Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:Revenues. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 12-month figure less the 9-month figure; 6-month figure less the 3-month figure; 9-month figure less the 6-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [3,074](/filings/0001558370-24-001529.md) | [4,140](/filings/0001558370-25-001222.md) | [5,207](/filings/0001104659-26-017530.md) | [7,027](/filings/0001104659-26-017530.md) | [1,831](/filings/0001104659-26-047689.md) |
| Gross margin | % | [18.3%](/filings/0001558370-24-001529.md) | [17.9%](/filings/0001558370-25-001222.md) | [19.0%](/filings/0001104659-26-017530.md) | [21.0%](/filings/0001104659-26-017530.md) | [22.0%](/filings/0001104659-26-047689.md) |
| Operating margin | % | [6.1%](/filings/0001558370-24-001529.md) | [6.1%](/filings/0001558370-25-001222.md) | [8.0%](/filings/0001104659-26-017530.md) | [10.7%](/filings/0001104659-26-017530.md) | [11.4%](/filings/0001104659-26-047689.md) |
| Net margin | % | [4.7%](/filings/0001558370-24-001529.md) | [5.9%](/filings/0001558370-25-001222.md) | [6.2%](/filings/0001104659-26-017530.md) | [7.4%](/filings/0001104659-26-017530.md) | [55.8%](/filings/0001104659-26-017530.md) |
| Diluted EPS | $ per share | [3.93](/filings/0001558370-24-001529.md) | [6.82](/filings/0001558370-25-001222.md) | [9.01](/filings/0001104659-26-017530.md) | [14.60](/filings/0001104659-26-017530.md) | [28.88](/filings/0001104659-26-017530.md) |
| Free cash flow | $m | [158](/filings/0001558370-24-001529.md) | [253](/filings/0001558370-25-001222.md) | [545](/filings/0001104659-26-017530.md) | [738](/filings/0001104659-26-017530.md) | [1,031](/filings/0001104659-26-017530.md) |

- Revenue. XBRL Revenue: us-gaap:Revenues.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:Revenues.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:Revenues.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:Revenues.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/fix/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $6.73bn | 3,397,683 |  | Reduced −115,244 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $4.55bn | 2,297,509 |  | Added +11,560 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $3.70bn | 1,866,170 |  | Reduced −15,014 |
| [FMR LLC](/funds/315066.md) | 2026-06-30 | $3.29bn | 1,659,799 |  | Added +210,282 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $3.05bn | 1,537,139 |  | Added +65,260 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $2.29bn | 1,151,350 |  | Reduced −87,269 |
| [AQR CAPITAL MANAGEMENT LLC](/funds/1167557.md) | 2026-06-30 | $2.08bn | 1,059,017 |  | Reduced −57,213 |
| [JPMORGAN CHASE & CO](/funds/19617.md) | 2026-06-30 | $1.63bn | 838,417 |  | Reduced −51,474 |
| [Capital World Investors](/funds/1422849.md) | 2026-06-30 | $1.43bn | 720,244 |  | Reduced −145,536 |
| [Invesco Ltd.](/funds/914208.md) | 2026-06-30 | $1.30bn | 658,314 |  | Added +51,734 |

## Recent filings

[All 1,271 filings](/companies/fix/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-22 | 20:12 ET | [10-Q](/filings/0001104659-26-118159.md) | Quarterly report, period 2026-09-30 | 0001104659-26-118159 |
| 2026-10-22 | 20:10 ET | [8-K](/filings/0001104659-26-118156.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-118156 |
| 2026-10-22 | 20:05 ET | [8-K](/filings/0001104659-26-118149.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-118149 |
| 2026-08-03 | 20:01 ET | [8-K](/filings/0001104659-26-089781.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-089781 |
| 2026-07-23 | 20:06 ET | [10-Q](/filings/0001104659-26-086258.md) | Quarterly report, period 2026-06-30 | 0001104659-26-086258 |
| 2026-07-23 | 20:05 ET | [8-K](/filings/0001104659-26-086255.md) | 2.02 Results of operations; 8.01 Other events; 9.01 Financial statements and exhibits | 0001104659-26-086255 |
| 2026-06-22 | 20:15 ET | [8-K](/filings/0001104659-26-076386.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-076386 |
| 2026-05-21 | 20:00 ET | [8-K](/filings/0001104659-26-065127.md) | 5.07 Shareholder vote results | 0001104659-26-065127 |
| 2026-05-01 | 21:17 ET | [8-K](/filings/0001104659-26-054254.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001104659-26-054254 |
| 2026-04-23 | 20:06 ET | [10-Q](/filings/0001104659-26-047689.md) | Quarterly report, period 2026-03-31 | 0001104659-26-047689 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0001104659-26-017530.md), filed Feb 19, 2026.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 1035983
- Tickers: FIX
- Exchange: NYSE
- SIC code: 1731 Electrical Work
- State of incorporation: not reported
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:31 ET. No prices; not investment advice.