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Side-by-side financial comparison of A. O. Smith (AOS) and MUELLER INDUSTRIES INC (MLI). Click either name above to swap in a different company.

MUELLER INDUSTRIES INC is the larger business by last-quarter revenue ($962.4M vs $912.5M, roughly 1.1× A. O. Smith). MUELLER INDUSTRIES INC runs the higher net margin — 16.0% vs 13.7%, a 2.2% gap on every dollar of revenue. On growth, MUELLER INDUSTRIES INC posted the faster year-over-year revenue change (4.2% vs 0.0%). A. O. Smith produced more free cash flow last quarter ($165.5M vs $121.4M). Over the past eight quarters, MUELLER INDUSTRIES INC's revenue compounded faster (6.4% CAGR vs -3.4%).

A. O. Smith Corporation is an American manufacturer of both residential and commercial water heaters and boilers, and the largest manufacturer and marketer of water heaters in North America. It also supplies water treatment and purification products in the Asian market. The company has 27 locations worldwide, including five manufacturing facilities in North America, as well as plants in Bengaluru in India, Nanjing in China and Veldhoven in The Netherlands.

Mueller Industries is an American manufacturing company that specializes in piping, industrial metals and climate machinery. It was founded in 1917 and is included on the Fortune 1000 list in 2022. The head office of the company is located in Memphis, Tennessee. Mueller Industries, Inc. is a multi-billion dollar revenue company that is publicly traded.

AOS vs MLI — Head-to-Head

Bigger by revenue
MLI
MLI
1.1× larger
MLI
$962.4M
$912.5M
AOS
Growing faster (revenue YoY)
MLI
MLI
+4.2% gap
MLI
4.2%
0.0%
AOS
Higher net margin
MLI
MLI
2.2% more per $
MLI
16.0%
13.7%
AOS
More free cash flow
AOS
AOS
$44.1M more FCF
AOS
$165.5M
$121.4M
MLI
Faster 2-yr revenue CAGR
MLI
MLI
Annualised
MLI
6.4%
-3.4%
AOS

Income Statement — Q4 FY2025 vs Q4 FY2025

Metric
AOS
AOS
MLI
MLI
Revenue
$912.5M
$962.4M
Net Profit
$125.4M
$153.7M
Gross Margin
38.4%
Operating Margin
17.9%
17.9%
Net Margin
13.7%
16.0%
Revenue YoY
0.0%
4.2%
Net Profit YoY
14.3%
11.7%
EPS (diluted)
$0.89
$1.37

Green = leading value per metric. Periods may differ when fiscal calendars don't align.

8-Quarter Revenue & Profit Trend

Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.

Revenue
AOS
AOS
MLI
MLI
Q4 25
$912.5M
$962.4M
Q3 25
$942.5M
$1.1B
Q2 25
$1.0B
$1.1B
Q1 25
$963.9M
$1.0B
Q4 24
$912.4M
$923.5M
Q3 24
$902.6M
$997.8M
Q2 24
$1.0B
$997.7M
Q1 24
$978.8M
$849.7M
Net Profit
AOS
AOS
MLI
MLI
Q4 25
$125.4M
$153.7M
Q3 25
$132.0M
$208.1M
Q2 25
$152.2M
$245.9M
Q1 25
$136.6M
$157.4M
Q4 24
$109.7M
$137.7M
Q3 24
$120.1M
$168.7M
Q2 24
$156.2M
$160.2M
Q1 24
$147.6M
$138.4M
Gross Margin
AOS
AOS
MLI
MLI
Q4 25
38.4%
Q3 25
38.7%
Q2 25
39.3%
Q1 25
38.9%
Q4 24
37.1%
Q3 24
37.4%
27.6%
Q2 24
38.7%
27.3%
Q1 24
39.3%
28.4%
Operating Margin
AOS
AOS
MLI
MLI
Q4 25
17.9%
17.9%
Q3 25
18.6%
25.6%
Q2 25
20.4%
26.7%
Q1 25
19.1%
20.6%
Q4 24
10.1%
18.4%
Q3 24
19.5%
20.7%
Q2 24
21.9%
21.0%
Q1 24
22.0%
21.6%
Net Margin
AOS
AOS
MLI
MLI
Q4 25
13.7%
16.0%
Q3 25
14.0%
19.3%
Q2 25
15.0%
21.6%
Q1 25
14.2%
15.7%
Q4 24
12.0%
14.9%
Q3 24
13.3%
16.9%
Q2 24
15.2%
16.1%
Q1 24
15.1%
16.3%
EPS (diluted)
AOS
AOS
MLI
MLI
Q4 25
$0.89
$1.37
Q3 25
$0.94
$1.88
Q2 25
$1.07
$2.22
Q1 25
$0.95
$1.39
Q4 24
$0.75
$1.21
Q3 24
$0.82
$1.48
Q2 24
$1.06
$1.41
Q1 24
$1.00
$1.21

Balance Sheet & Financial Strength

Snapshot of each company's liquidity, leverage and book value from the latest quarter.

Metric
AOS
AOS
MLI
MLI
Cash + ST InvestmentsLiquidity on hand
$193.2M
$1.4B
Total DebtLower is stronger
$155.0M
Stockholders' EquityBook value
$1.9B
$3.2B
Total Assets
$3.1B
$3.7B
Debt / EquityLower = less leverage
0.08×

8-quarter trend — quarters aligned by calendar period.

Cash + ST Investments
AOS
AOS
MLI
MLI
Q4 25
$193.2M
$1.4B
Q3 25
$172.8M
$1.3B
Q2 25
$177.9M
$1.1B
Q1 25
$200.2M
$873.6M
Q4 24
$276.1M
$1.1B
Q3 24
$255.6M
$969.6M
Q2 24
$233.3M
$825.7M
Q1 24
$303.1M
$1.4B
Total Debt
AOS
AOS
MLI
MLI
Q4 25
$155.0M
Q3 25
Q2 25
Q1 25
Q4 24
$193.2M
Q3 24
Q2 24
Q1 24
Stockholders' Equity
AOS
AOS
MLI
MLI
Q4 25
$1.9B
$3.2B
Q3 25
$1.8B
$3.1B
Q2 25
$1.8B
$2.9B
Q1 25
$1.9B
$2.7B
Q4 24
$1.9B
$2.8B
Q3 24
$1.9B
$2.7B
Q2 24
$1.9B
$2.5B
Q1 24
$1.9B
$2.4B
Total Assets
AOS
AOS
MLI
MLI
Q4 25
$3.1B
$3.7B
Q3 25
$3.2B
$3.7B
Q2 25
$3.2B
$3.5B
Q1 25
$3.3B
$3.2B
Q4 24
$3.2B
$3.3B
Q3 24
$3.2B
$3.2B
Q2 24
$3.2B
$3.1B
Q1 24
$3.2B
$2.9B
Debt / Equity
AOS
AOS
MLI
MLI
Q4 25
0.08×
Q3 25
Q2 25
Q1 25
Q4 24
0.10×
Q3 24
Q2 24
Q1 24

Cash Flow & Capital Efficiency

How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.

Metric
AOS
AOS
MLI
MLI
Operating Cash FlowLast quarter
$183.1M
$141.2M
Free Cash FlowOCF − Capex
$165.5M
$121.4M
FCF MarginFCF / Revenue
18.1%
12.6%
Capex IntensityCapex / Revenue
1.9%
2.1%
Cash ConversionOCF / Net Profit
1.46×
0.92×
TTM Free Cash FlowTrailing 4 quarters
$546.0M
$686.6M

8-quarter trend — quarters aligned by calendar period.

Operating Cash Flow
AOS
AOS
MLI
MLI
Q4 25
$183.1M
$141.2M
Q3 25
$255.4M
$310.1M
Q2 25
$139.6M
$190.6M
Q1 25
$38.7M
$113.6M
Q4 24
$221.9M
$140.1M
Q3 24
$195.9M
$231.4M
Q2 24
$57.4M
$100.8M
Q1 24
$106.6M
$173.6M
Free Cash Flow
AOS
AOS
MLI
MLI
Q4 25
$165.5M
$121.4M
Q3 25
$240.6M
$291.8M
Q2 25
$122.5M
$176.5M
Q1 25
$17.4M
$97.0M
Q4 24
$191.3M
$111.2M
Q3 24
$163.4M
$205.7M
Q2 24
$34.5M
$91.6M
Q1 24
$84.6M
$157.2M
FCF Margin
AOS
AOS
MLI
MLI
Q4 25
18.1%
12.6%
Q3 25
25.5%
27.1%
Q2 25
12.1%
15.5%
Q1 25
1.8%
9.7%
Q4 24
21.0%
12.0%
Q3 24
18.1%
20.6%
Q2 24
3.4%
9.2%
Q1 24
8.6%
18.5%
Capex Intensity
AOS
AOS
MLI
MLI
Q4 25
1.9%
2.1%
Q3 25
1.6%
1.7%
Q2 25
1.7%
1.2%
Q1 25
2.2%
1.7%
Q4 24
3.4%
3.1%
Q3 24
3.6%
2.6%
Q2 24
2.2%
0.9%
Q1 24
2.2%
1.9%
Cash Conversion
AOS
AOS
MLI
MLI
Q4 25
1.46×
0.92×
Q3 25
1.93×
1.49×
Q2 25
0.92×
0.78×
Q1 25
0.28×
0.72×
Q4 24
2.02×
1.02×
Q3 24
1.63×
1.37×
Q2 24
0.37×
0.63×
Q1 24
0.72×
1.25×

Financial Flow Comparison

Revenue → gross profit → operating profit → net profit for each company.

Revenue Breakdown by Segment

AOS
AOS

North America Segment$713.7M78%
Rest Of World$158.3M17%
Other$40.5M4%

MLI
MLI

Tube And Fittings$484.6M50%
Industrial Metals$252.2M26%
Valves And Plumbing Specialties$122.5M13%
Flex Duct And Other HVAC Components$80.8M8%
Other Products$14.9M2%

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