Comfort Systems USA (FIX) Stock Fundamentals, Analysis & Risk Signals

Health score, price, valuation, risk signals, and key metrics at a glance.

Comfort Systems USA

NYSE•Industrials•Engineering & Construction

$1,285.13+84.99(0.07%)After hours

Market Cap

$42.14B

P/E

25.8x

P/S

3.4x

P/B

12.6x

Comfort Systems USA, Inc., together with its subsidiaries, provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States. The company operates through two segments: Mechanical and Electrical. It offers heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping and controls, off-site construction, monitoring, and fire protection. The company is also involved in the design, engineering, integration, installation, and start-up of mechanical, electrical, and plumbing (MEP) and related systems in new buildings; and renovation, expansion, maintenance, monitoring, repair, and replacement of systems in existing buildings. In addition, it provides remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems. The company serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.

How this company scores

ExcellentMetricSide Score: 92/100

Strongest: Growth (25/25); weakest: Balance Sheet & Red Flags (21/25).

Profitability22/25

Growth25/25

Balance Sheet & Red Flags21/25

Cash & Earnings Quality24/25

Strengths

Growing revenueRising free cash flowStrong marginsHigh ROE

No red flags in the last 8 quarters.

Valuation vs. 5-year range

Today's multiple positioned against its own trailing range — a visual premium/discount check.

P/E · 25.8x5y range 13.7x – 47.8x

Currently near its 20-quarter median.

P/S · 3.4x5y range 0.8x – 6.1x

Currently above its 20-quarter median.

P/B · 12.6x5y range 3.3x – 21.3x

Currently above its 20-quarter median.

Price & Volume

Market Cap $42.14B

Metrics at a Glance

as of September 2026

Revenue & Profit

Revenue, EBITDA, operating income, net income, EPS, and shares

TTM Revenue: $12.54B
Q. Revenue: $3.77B
TTM EBITDA: $2.16B
TTM Op. Income: $2.09B
Q. Op. Income: $624.57M
TTM Net Income: $1.63B
Q. Net Income: $489.04M
EPS: $13.93
Shares Out.: $35.12M

$12.54B in TTM revenue grew 50.7% YoY, reaching $3.77B last quarter. TTM EBITDA of $2.16B and TTM operating income of $2.09B show growth is flowing through to the bottom line. TTM net income of $1.63B means revenue is converting into profit. Across the last 8 quarters, TTM revenue has risen for 7 consecutive quarters — an improving trend.

Margins

Gross, EBITDA, operating, and net margin trends

Gross Margin: 24.8%
EBITDA Margin: 16.6%
Op. Margin: 16.6%
Net Margin: 13.0%

Op. margin of 16.6% is up 1.1% YoY — cost efficiency is improving. Net margin at 13.0% and gross margin of 24.8% show how much of each revenue dollar survives to profit. Over the past year, operating margin is up 7% — a weakening trend.

Price Ratios

P/E, P/S, P/B, EV/EBITDA, FCF yield, and earnings yield

P/E Ratio: 25.8x
P/S Ratio: 3.4x
P/B Ratio: 12.6x

At 25.8x P/E, the stock trades within typical market levels. P/S of 3.4x and P/B of 12.6x provide additional context. Use the growth and margin sections to judge whether the multiple is justified. Over the past year, P/E is down 24% — an improving trend.

Assets & Liabilities

Total assets, cash, debt, book value, and leverage

Total Assets: $9.81B
Cash: $2.16B
Long-Term Debt: $43.84M
Book Value: $3.34B
D/E Ratio: 0.0
Debt/EBITDA: 0.1

With $9.81B in assets and $43.84M in long-term debt, D/E is 0.0and book value is $3.34B — a conservative capital structure with a cushion to weather downturns. Over the past year, debt/equity is down 78% — an improving trend.

Cash Flow

Operating cash flow, free cash flow, FCF margin, and earnings quality

Op. Cash Flow: $1.01B
TTM Free Cash Flow: $2.44B
FCF Margin: 19.5%
FCF / Net Income: 1.5

TTM FCF of $2.44B on $1.01B in operating cash flow. The FCF / Net Income ratio of 1.5x means free cash flow covers net income — earnings are backed by cash. Across the last 8 quarters, free cash flow has risen for 6 consecutive quarters — an improving trend.