FIX vs. MLI: Comfort Systems USA vs. Mueller Industries Stock Comparison

November 11, 2026

How do Comfort Systems USA (FIX) and Mueller Industries (MLI) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.

Company Profile

Comfort Systems USA (FIX) and Mueller Industries (MLI) both fall under the Capital Goods industry group, but FIX is classified in Construction & Engineering while MLI is classified in Machinery.

Company profile comparison for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Profile Item	FIX	MLI
Name	Comfort Systems USA Inc.	Mueller Industries, Inc.
Country/Region	United States	United States
GICS Sector	Industrials	Industrials
GICS Industry Group	Capital Goods	Capital Goods
GICS Industry	Construction & Engineering	Machinery
GICS Sub-Industry	Construction & Engineering	Industrial Machinery & Supplies & Components
Market Capitalization	35.81 billion USD	11.54 billion USD
Currency	USD	USD
Exchange	NYSE	NYSE
Listing Date	June 27, 1997	February 25, 1991
Security Type	Common Stock	Common Stock

Price Performance

Cumulative Growth

FIX

MLI

GSPC

Comfort Systems USA (FIX) vs. Mueller Industries (MLI), with S&P 500 (GSPC) for reference: Growth of a $10,000 investment over the past five years. Adjusted for dividends and splits.

Trailing Returns

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Trailing total returns for Comfort Systems USA (FIX) and Mueller Industries (MLI). Returns over one year are annualized.

Calendar-Year Returns

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Calendar-year total returns for Comfort Systems USA (FIX) and Mueller Industries (MLI). Each bar is that year's total return, measured year-end to year-end.

Performance Metrics

Price performance metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Total Return (1Y)	15.31%	3.68%
Total Return (3Y, Annualized)	81.62%	44.56%
Total Return (5Y, Annualized)	62.48%	32.39%

Risk Profile

Drawdown History

FIX

MLI

GSPC

Comfort Systems USA (FIX) vs. Mueller Industries (MLI), with S&P 500 (GSPC) for reference: Drawdown from the running peak over the past five years. Each line shows the decline from its prior peak; 0% marks a new high.

Return Distribution

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Distribution of monthly total returns for Comfort Systems USA (FIX) and Mueller Industries (MLI). Each bar is the share of months whose return fell in that 5% bucket.

Risk Metrics

Risk profile metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Volatility (1Y, Annualized)	60.97%	34.44%
Beta (5Y)	1.68	1.01
Max Drawdown (5Y)	-53.28%	-27.79%
Avg. Volume (3M)	471.64K	1.61M

Risk-Adjusted Performance

Risk-Return Positioning

FIX and MLI are plotted by 1-year volatility (risk) and 1-year return. The dashed Capital Allocation Line runs from the risk-free rate through the shared industry median.

Risk-Adjusted Metrics

Risk-adjusted metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Sharpe Ratio (1Y)	0.18	-0.02
Sortino Ratio (1Y)	0.25	-0.02

Profitability

ROE (TTM)

Both companies show strong equity returns, but Comfort Systems USA (FIX) at 58.61% is the standout with ROE above its industry range; Mueller Industries (MLI) at 26.26% also sits in the top quartile.

FIX

Capital Goods industry group

58.61%

FIX: 58.61%
Max: 40.55%
Q3: 19.29%
Median: 12.12%
Q1: 4.08%
Min: -17.12%

MLI

Capital Goods industry group

26.26%

Max: 40.55%
MLI: 26.26%
Q3: 19.29%
Median: 12.12%
Q1: 4.08%
Min: -17.12%

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their ROE against the Capital Goods industry group benchmark.

Net Margin (TTM)

For every dollar of sales, both Comfort Systems USA (FIX) at 13.01% and Mueller Industries (MLI) at 17.27% retain more as net profit than most peers, landing in the top net margin quartile of their industries.

FIX

Capital Goods industry group

13.01%

Max: 27.47%
FIX: 13.01%
Q3: 12.10%
Median: 6.30%
Q1: 1.40%
Min: -12.89%

MLI

Capital Goods industry group

17.27%

Max: 27.47%
MLI: 17.27%
Q3: 12.10%
Median: 6.30%
Q1: 1.40%
Min: -12.89%

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their net margin against the Capital Goods industry group benchmark.

Operating Margin (TTM)

Mueller Industries (MLI) at 19.53% operates in the top operating margin quartile, ahead of Comfort Systems USA (FIX) at 16.47%, which runs around its industry’s norm.

FIX

Capital Goods industry group

16.47%

Max: 36.60%
Q3: 18.33%
FIX: 16.47%
Median: 11.12%
Q1: 5.14%
Min: -12.63%

MLI

Capital Goods industry group

19.53%

Max: 36.60%
MLI: 19.53%
Q3: 18.33%
Median: 11.12%
Q1: 5.14%
Min: -12.63%

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their operating margin against the Capital Goods industry group benchmark.

Profitability Metrics

Profitability metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
ROE (TTM)	58.61%	26.26%
ROA (TTM)	16.88%	16.23%
Net Margin (TTM)	13.01%	17.27%
Operating Margin (TTM)	16.47%	19.53%
Gross Margin (TTM)	25.70%	27.25%

Growth

Revenue Growth

Comfort Systems USA (FIX) at 29.52% sits in the top revenue growth quartile, while Mueller Industries (MLI) at 10.87% is closer to the peer norm — faster top-line expansion for FIX.

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their Revenue Growth across different time periods.

EPS Growth

Comfort Systems USA (FIX) at 97.81% sits in the top EPS growth quartile, while Mueller Industries (MLI) at 29.19% is closer to the peer norm — faster per-share earnings growth for FIX.

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their EPS Growth across different time periods.

Growth Metrics

Growth metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Revenue Growth (YoY)	29.52%	10.87%
Revenue Growth (3Y CAGR)	30.03%	1.62%
EPS Growth (YoY)	97.81%	29.19%
EPS Growth (3Y CAGR)	61.78%	5.63%

Financial Strength

Current Ratio (MRQ)

Mueller Industries (MLI) at 4.39 carries current ratio above its industry’s typical mid-range, while Comfort Systems USA (FIX) at 1.15 runs in the tighter-liquidity quartile — different working-capital profiles, both worth examining.

FIX

Capital Goods industry group

1.15

Max: 5.22
Q3: 2.95
Median: 2.08
Q1: 1.43
FIX: 1.15
Min: 0.36

MLI

Capital Goods industry group

4.39

Max: 5.22
MLI: 4.39
Q3: 2.95
Median: 2.08
Q1: 1.43
Min: 0.36

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their current ratio against the Capital Goods industry group benchmark.

Debt / Equity (MRQ)

Both Comfort Systems USA (FIX) at 0.11 and Mueller Industries (MLI) at 0.01 keep leverage in the lower quartile of their industries, with less balance-sheet debt relative to equity than most peers.

FIX

Capital Goods industry group

0.11

Max: 2.33
Q3: 1.12
Median: 0.60
Q1: 0.29
FIX: 0.11
Min: 0.00

MLI

Capital Goods industry group

0.01

Max: 2.33
Q3: 1.12
Median: 0.60
Q1: 0.29
MLI: 0.01
Min: 0.00

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their debt-to-equity ratio against the Capital Goods industry group benchmark.

Financial Strength Metrics

Financial strength metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Current Ratio (MRQ)	1.15	4.39
Debt / Equity (MRQ)	0.11	0.01
Net Debt / EBITDA	-0.81	-1.31

Dividends

Dividend Yield (TTM)

Mueller Industries (MLI) at 1.24% delivers top-quartile income for its industry, while Comfort Systems USA (FIX) at 0.31% pays a more typical yield — both are credible income propositions, MLI the richer one.

FIX

Capital Goods industry group

0.31%

Max: 2.66%
Q3: 1.14%
FIX: 0.31%
Median: 0.24%
Q1: 0.00%
Min: 0.00%

MLI

Capital Goods industry group

1.24%

Max: 2.66%
MLI: 1.24%
Q3: 1.14%
Median: 0.24%
Q1: 0.00%
Min: 0.00%

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their dividend yield against the Capital Goods industry group benchmark.

Dividend Payout Ratio (TTM)

Both Comfort Systems USA (FIX) at 6.48% and Mueller Industries (MLI) at 16.67% keep payout ratio within their industries’ typical mid-ranges — dividend policies that share earnings without consuming too much of them.

FIX

Capital Goods industry group

6.48%

Max: 67.39%
Q3: 28.02%
Median: 6.86%
FIX: 6.48%
Q1: 0.00%
Min: 0.00%

MLI

Capital Goods industry group

16.67%

Max: 67.39%
Q3: 28.02%
MLI: 16.67%
Median: 6.86%
Q1: 0.00%
Min: 0.00%

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their payout ratio against the Capital Goods industry group benchmark.

Dividend Metrics

Dividend metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
Dividend Yield (TTM)	0.31%	1.24%
Dividend Payout Ratio (TTM)	6.48%	16.67%

Valuation

P/E Ratio (TTM)

Mueller Industries (MLI) at 13.58 sits in the cheaper P/E ratio quartile, while Comfort Systems USA (FIX) at 21.98 is closer to its industry’s usual earnings multiple — a discount for MLI, though growth and earnings durability still matter.

FIX

Capital Goods industry group

21.98

Max: 59.38
Q3: 35.92
Median: 25.41
FIX: 21.98
Q1: 19.47
Min: 3.03

MLI

Capital Goods industry group

13.58

Max: 59.38
Q3: 35.92
Median: 25.41
Q1: 19.47
MLI: 13.58
Min: 3.03

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their P/E ratio against the Capital Goods industry group benchmark.

P/S Ratio (TTM)

On P/S ratio, both Comfort Systems USA (FIX) at 2.85 and Mueller Industries (MLI) at 2.31 are priced roughly in line with their industries — neither looks cheap nor rich on a sales basis.

FIX

Capital Goods industry group

2.85

Max: 7.54
Q3: 3.76
FIX: 2.85
Median: 2.15
Q1: 1.03
Min: 0.03

MLI

Capital Goods industry group

2.31

Max: 7.54
Q3: 3.76
MLI: 2.31
Median: 2.15
Q1: 1.03
Min: 0.03

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their P/S ratio against the Capital Goods industry group benchmark.

P/B Ratio (MRQ)

Mueller Industries (MLI) at 0.33 sits in the lower P/B ratio quartile relative to book while Comfort Systems USA (FIX) at 10.66 prices above its industry range — a wide valuation gap against assets.

FIX

Capital Goods industry group

10.66

FIX: 10.66
Max: 9.66
Q3: 5.00
Median: 3.12
Q1: 1.81
Min: -1.08

MLI

Capital Goods industry group

0.33

Max: 9.66
Q3: 5.00
Median: 3.12
Q1: 1.81
MLI: 0.33
Min: -1.08

Comfort Systems USA (FIX) vs. Mueller Industries (MLI): A comparison of their P/B ratio against the Capital Goods industry group benchmark.

Valuation Metrics

Valuation metrics for Comfort Systems USA (FIX) and Mueller Industries (MLI)
Metric	FIX	MLI
P/E Ratio (TTM)	21.98	13.58
P/S Ratio (TTM)	2.85	2.31
P/B Ratio (MRQ)	10.66	0.33
Free Cash Flow Yield (TTM)	5.94%	4.65%