Comfort Systems USA

FIX · NYSE · Industrials · Financials, fiscal 2016 to 2025

FIX · Last close · October 26, 2026

$1,244.19

Comfort Systems USA's revenue rose 29.5% to $9.1 billion in fiscal 2025. Its operating margin was 14.4%, up from 10.7% a year earlier. Free cash flow was $1.0 billion, up 39.8%. It paid out $285 million in dividends and buybacks, 28% of free cash flow. The diluted share count fell 1.0%.

COMFORT SYSTEMS USA, INC. Latest fiscal year ended December 31, 2025 10-K filed February 19, 2026 · 0001104659-26-017530 Updated October 22, 2026

Revenue

$9.1B

29.5%

Operating margin

14.4%

3.8 pts

Net income

$1.0B

95.7%

Free cash flow

$1.0B

39.8%

Return on capital

73.3%

23.1 pts

Market cap

$43.8B

Oct 26 close

P/E

26.9x

On $46.31 EPS, 4 qtrs

Operating margin is operating income as a share of revenue. Free cash flow is cash from operations minus capital spending. Return on capital is after-tax operating income as a share of the money invested in the business: debt plus equity, minus cash. Market cap is the last closing share price times the latest diluted share count, so it is approximate. P/E is the last close divided by diluted earnings per share over the last four quarters, or the latest fiscal year where the quarters aren't available; there is none when the company made a loss.

Charts show fiscal years, from the 10-K filings.

Revenue and margins

Revenue

US$ billions, fiscal years

Margins

Percent of revenue

GrossOperatingNetFree cash flow

Net income and earnings per share

From fiscal 2016 to 2025, earnings per share grew 36.8% a year and net income 35.8% a year, as buybacks cut the share count by 6%.

Net income

US$ billions, fiscal years; loss years in red.

Diluted earnings per share

US$ per share, fiscal years, restated for any stock splits; loss years in red.

Returns on capital

Return on capital and on equity

Percent. Return on capital is after-tax operating income over the money invested in the business (debt plus equity, minus cash); return on equity is net income over shareholders' equity. Both use the average of opening and closing balances.

Return on capitalReturn on equity

Cash flow

Free cash flow

US$ billions. Cash from operations minus capital expenditure; negative years in red.

Payouts and share count

Dividends and buybacks

US$ billions, cash paid in each fiscal year

DividendsShare buybacks

Diluted share count

Weighted-average diluted shares, millions

Valuation

Two ways to value Comfort Systems USA yourself, both starting from its filings: a discounted cash flow model and the price-to-earnings method.

Discounted cash flow (DCF)

A discounted cash flow (DCF) model values a business as the cash it may generate in future, discounted back to today. The starting figures come from Comfort Systems USA's 10-K (or, for net cash and shares, its latest 10-Q) and the assumptions are yours: start from one of three example scenarios, then change any figure to see what it implies for a share, and how that compares with the last share price.

Value per share on three example scenarios, from Comfort Systems USA's cash from operations minus depreciation in fiscal 2025 (free cash flow before spending to grow: capital spending was 2.5 times depreciation, which holds its free cash flow down) of $1.1B, net cash of $837M at December 31, 2025 and 35 million diluted shares, from its filings. The scenarios are fitted to Comfort Systems USA: the base scenario's growth in years 1 to 5 is its revenue growth over the last 3 years, 30.0% a year, kept between 0% and 20%; the cautious and optimistic ones are lower and higher, and growth in years 6 to 10 is halfway to the long-run rate. The base scenario's discount rate is 9% for a business of moderate risk (Construction & Engineering); the cautious and optimistic ones use a point more and a point less. Select one to load it into the calculator. These are the model's arithmetic on those assumptions, not a forecast or a price target.

From the filings

Starting free cash flow, US$ millions

Cash from operations minus depreciation in fiscal 2025: a rough guide to cash flow before spending to grow, for a company building heavily.

Net cash, US$ millions

Cash and short-term investments minus debt and finance leases at December 31, 2025. Negative means net debt.

Diluted shares, millions

Weighted-average diluted shares in fiscal 2025.

Your assumptions

Start from

Fitted to Comfort Systems USA's own revenue growth, as above. Cautious: growth of 10% then 6% a year, 2% after year 10, a 10% discount rate. Base: growth of 20% then 11% a year, 2.5% after year 10, a 9% discount rate. Optimistic: growth of 25% then 14% a year, 3% after year 10, a 8% discount rate.

Free cash flow growth, years 1 to 5 (% a year)

Free cash flow growth, years 6 to 10 (% a year)

Growth after year 10 (% a year)Long-run growth forever after year 10. Usually close to inflation, and always below the discount rate.

Discount rate (% a year)The yearly return an investor wants for the risk. A higher rate gives a lower value.

Value per share on these assumptions

—

Last close, October 26, 2026: $1,244.19
Value on these assumptions, against the last close: —

Cash flows in years 1 to 10, valued today: —
Everything after year 10, valued today: —
Plus net cash: —
Share of value from after year 10: —

Projected free cash flow

US$ billions. Each column is one year's projected free cash flow, split into what it is worth today and the part removed by discounting.

Value todayRemoved by discounting

How the value changes with two assumptions

Value per share in US$, with the growth rates above. The highlighted cell matches the current assumptions.

How the model works. Free cash flow grows at the first rate for five years and the second rate for five more, and each year is discounted at the discount rate. Everything after year 10 is valued as year-10 cash flow × (1 + growth after year 10) ÷ (discount rate − growth after year 10), discounted back ten years. Net cash is added and the total is divided by diluted shares. The result depends entirely on the assumptions. It is not a forecast, a price target or a recommendation. The last close is the consolidated US closing price, from Databento.

Price-to-earnings (P/E) method

Another common way to value a company is to multiply its earnings per share by a price-to-earnings (P/E) multiple: the number of years of today's earnings an investor pays for a share. A higher multiple usually means investors expect earnings to grow. Choose a multiple, for example from similar companies, to see the value it gives.

Value per share on three example scenarios, from Comfort Systems USA's earnings per share of $46.31 (over the last four quarters). Each grows earnings for a year at the cash flow scenarios' rates and applies a multiple to next year's earnings: 26.9×, the middle of Comfort Systems USA's own P/E today, its peers' median and its sector's median (Comfort Systems USA's own P/E today) for the base scenario, 20% less and more for the cautious and optimistic ones. The price is brought back a year at 10%, 9% and 8%. Select one to load it into the calculator. These are the model's arithmetic on those assumptions, not a forecast or a price target.

Earnings per share, US$

Diluted earnings per share over the four quarters to September 30, 2026, from the 10-Qs and 10-K.

P/E multiple

P/E today is the last close divided by the latest earnings per share, the four quarters' where available. Peers: Jacobs Solutions, MasTec.

Earnings growth in the years ahead (% a year) Starts at Comfort Systems USA's revenue growth over the last 3 years, 30.0% a year, kept between 0% and 20%, as the base scenario does.

Earnings per share in the years ahead, US$

Year 1Year 2Year 3Year 4Year 5

Type your own estimate for any year; the years after it carry on at the growth rate.

Apply the multiple to earnings

A multiple on a future year's earnings gives the price then, brought back to today at the discount rate below.

Discount rate (% a year) The yearly return an investor wants for the risk, as in the cash flow model.

Value per share today at this multiple

—

Last close, October 26, 2026: $1,244.19
Value at this multiple, against the last close: —
Comfort Systems USA's P/E at the last close: 26.9×

Company	Last close	Earnings per share	P/E today
Jacobs SolutionsJ	$147.14	$2.85	51.6×
MasTecMTZ	$172.59	$6.27	27.5×
Comfort Systems USAFIX	$1,244.19	$46.31	26.9×

How the P/E method works. Value per share is earnings per share times the multiple. On a future year's earnings, that gives the price in that year, which is brought back to today at the discount rate: price ÷ (1 + discount rate) for each year ahead. It is quick and easy to compare across companies, but it ignores debt and cash, and earnings can swing with one-off gains and charges, so a multiple says most about steady, profitable businesses. Like the cash flow model, the result depends entirely on the assumptions you choose. It is not a forecast, a price target or a recommendation.

Balance sheet

Fiscal year end	FY21	FY22	FY23	FY24	FY25
Cash and short-term investments	59	57	205	550	982
Debt incl. finance leases	388	256	44	68	145
Net debt (negative means net cash)	330	199	−161	−482	−837
Net debt to EBITDA	1.5x	0.7x	−0.3x	−0.6x	−0.6x
Debt to equity	0.5x	0.3x	0.0x	0.0x	0.1x
Interest coverage	30.4x	19.0x	40.7x	112.7x	145.9x
Current ratio	1.2x	1.1x	1.1x	1.1x	1.2x
Quick ratio	1.2x	1.1x	1.1x	1.1x	1.2x

US$ millions unless stated, at each fiscal year end. Net debt to EBITDA is debt minus cash, divided by operating income before depreciation and amortization: roughly how many years of those earnings the net debt equals. Debt to equity is debt as a multiple of shareholders' equity. Interest coverage is operating income divided by interest expense. The current ratio is current assets over current liabilities; the quick ratio leaves out inventory.

Insider trades

Over the 12 months between October 27, 2025 and October 26, 2026, no insider bought Comfort Systems USA shares on the open market, and 12 insiders sold $185.2 million.

Date	Insider	Trade	Shares	Price	Value	Filing
Aug 26, 2026	Brian E. LaneChief Executive Off., Director	Sold	16,024	$1,608.21	$25.8 million	Form 4
Aug 17, 2026	William George IIIChief Financial Officer	Sold	2,554	$1,859.65	$4.7 million	Form 4
Aug 11, 2026	Franklin MyersDirector	Sold	4,000	$1,693.92	$6.8 million	Form 4
Aug 10, 2026	Franklin MyersDirector	Sold	3,500	$1,690.47	$5.9 million	Form 4
Jun 24, 2026	Franklin MyersDirector	Sold	6,700	$1,954.47	$13.1 million	Form 4
May 27, 2026	Rhoman J HardyDirector	Sold	342	$1,900.08	$649,827	Form 4
May 11, 2026	Julie ShaeffChief Accounting Officer	Sold	1,123	$2,000.37	$2.2 million	Form 4
May 11, 2026	William George IIIChief Financial Officer	Sold	1,000	$2,020.97	$2.0 million	Form 4
May 8, 2026	William George IIIChief Financial Officer	Sold	4,000	$1,948.17	$7.8 million	Form 4
May 7, 2026	Franklin MyersDirector	Sold	4,500	$1,902.57	$8.6 million	Form 4
May 5, 2026	Brian E. LaneChief Executive Off., Director	Sold	11,113	$1,969.84	$21.9 million	Form 4
Apr 30, 2026	Pablo G. MercadoDirector	Sold	500	$1,779.78	$889,890	Form 4

The latest 12 of 30 trades. Open-market purchases and sales by officers, directors and 10% owners, from their Form 4 filings with the SEC: one row per person, day and filing, at the day's average price. Grants, option exercises and shares withheld for tax aren't counted. Insiders buy and sell for many reasons, such as taxes, spreading their savings or a plan set up months earlier, so a trade on its own says little about where a company is heading. For information only, not investment advice. Insider trades at all companies

Piotroski F-score

The F-score counts how many of nine simple tests of profitability, funding and efficiency a company passed in a year (Piotroski, 2000). The more tests passed, the stronger the year: 8 or 9 is strong, 0 to 2 weak. Companies that report no gross profit are scored on the other eight.

Test	FY23	FY24	FY25
Net income is positive	Pass	Pass	Pass
Cash from operations is positive	Pass	Pass	Pass
Return on assets rose	Pass	Pass	Pass
Cash from operations exceeds net income	Pass	Pass	Pass
Debt fell relative to assets	Pass	Fail	Fail
Current ratio rose	Fail	Fail	Pass
Share count didn't rise	Pass	Pass	Pass
Gross margin rose	Pass	Pass	Pass
Revenue rose relative to assets	Pass	Pass	Fail
F-score	8 of 9	7 of 9	7 of 9
Accruals ratio	−10.7%	−8.2%	−2.9%

The accruals ratio is net income minus cash from operations, over average total assets.

Compare

Put Comfort Systems USA side by side with any other company we cover: revenue, growth, margins, cash flow and returns, with ten years of charts.

Similar companies

Company	Year	Revenue growth	Operating margin	Free cash flow margin	Return on capital	Net debt to EBITDA	F-score	Compare
Comfort Systems USA	FY25	29.5%	14.4%	11.3%	73.3%	−0.6x	7
Stantec	FY25	8.6%	—	—	12.9%	—	5	Compare
APi Group	FY25	12.7%	7.0%	8.4%	7.7%	2.1x	8	Compare
Jacobs Solutions	FY25	4.6%	7.2%	5.0%	10.1%	1.1x	7	Compare
MasTec	FY25	16.2%	—	2.0%	11.2%	1.7x	7	Compare

Each company's latest fiscal year. Fiscal years end in different months, so the periods don't line up exactly. Free cash flow margin is free cash flow as a share of revenue. Net debt to EBITDA is explained under the balance sheet, and the F-score above.

10 years of figures

Fiscal year	FY16	FY17	FY18	FY19	FY20	FY21	FY22	FY23	FY24	FY25
Income statement
Revenue	1,634	1,788	2,183	2,615	2,857	3,074	4,140	5,207	7,028	9,102
Revenue growth	3.4%	9.4%	22.1%	19.8%	9.2%	7.6%	34.7%	25.8%	35.0%	29.5%
Gross profit	344	366	446	502	547	563	742	990	1,476	2,196
Research and development	—	—	—	—	—	—	—	—	—	—
Operating income	102	99	150	164	191	188	254	418	749	1,315
Net income	65	55	113	114	150	143	246	323	522	1,023
Diluted EPS (US$)	1.72	1.47	3.00	3.08	4.09	3.93	6.82	9.01	14.60	28.88
Diluted shares (millions)	38	38	38	37	37	36	36	36	36	35
Cash flow
Cash from operations	91	114	147	142	286	180	302	640	849	1,186
Capital expenditure	23	36	27	32	24	22	48	95	111	155
Free cash flow	68	79	120	110	262	158	253	545	738	1,031
Dividends paid	10	11	12	14	16	17	20	30	43	69
Share buybacks	13	9	28	20	30	27	38	21	58	216
Acquisitions	57	95	70	196	186	228	49	102	236	280
Stock-based compensation	5	6	7	6	7	11	10	13	17	22
Balance sheet at fiscal year end
Cash and short-term investments	32	36	46	51	55	59	57	205	550	982
Debt incl. finance leases	3	60	77	226	236	388	256	44	68	145
Total assets	709	881	1,063	1,505	1,757	2,209	2,598	3,306	4,711	6,441
Total liabilities	332	463	564	920	1,061	1,403	1,598	2,028	3,006	3,992
Shareholders' equity	377	418	498	585	696	806	1,000	1,278	1,705	2,449
Margins and ratios
Gross margin	21.1%	20.5%	20.4%	19.2%	19.1%	18.3%	17.9%	19.0%	21.0%	24.1%
Operating margin	6.2%	5.5%	6.9%	6.3%	6.7%	6.1%	6.1%	8.0%	10.7%	14.4%
Net margin	4.0%	3.1%	5.2%	4.4%	5.3%	4.7%	5.9%	6.2%	7.4%	11.2%
Free cash flow margin	4.2%	4.4%	5.5%	4.2%	9.2%	5.1%	6.1%	10.5%	10.5%	11.3%
Return on capital	19.6%	13.8%	23.5%	19.1%	18.2%	14.1%	21.8%	30.1%	50.2%	73.3%
Return on equity	17.9%	13.9%	24.6%	21.1%	23.4%	19.1%	27.2%	28.4%	35.0%	49.2%
Return on assets	9.3%	7.0%	11.6%	8.9%	9.2%	7.2%	10.2%	11.0%	13.0%	18.3%
Net debt to EBITDA	−0.2x	0.2x	0.2x	0.9x	0.8x	1.5x	0.7x	−0.3x	−0.6x	−0.6x

US$ millions unless stated. Where a later 10-K restated a year, the latest filed figure is shown. Download all figures (CSV, US$ millions)

Source: Comfort Systems USA's Form 10-K filings, from SEC EDGAR. For information only, not investment advice. The Filing Desk is not affiliated with Comfort Systems USA.