Sifting through countless of stocks in the Machinery industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Mueller Industries, Inc. or CECO Environmental Corp. because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Mueller Industries, Inc. and CECO Environmental Corp. compare based on key financial metrics to determine which better meets your investment needs.

About Mueller Industries, Inc. and CECO Environmental Corp.

Mueller Industries, Inc. manufactures and sells copper, brass, and aluminum products in the United States, the United Kingdom, Canada, Asia and the Middle East, and Mexico. It operates through three segments: Piping Systems, Industrial Metals, and Climate. The Piping Systems segment offers copper tubes, fittings, line sets, and pipe nipples; resells steel pipe, brass and plastic plumbing valves, malleable iron fittings, faucets, and plumbing specialties. This segment sells its products to wholesalers in the plumbing and refrigeration markets, distributors to the manufactured housing and recreational vehicle industries, building material retailers, and air-conditioning original equipment manufacturers (OEMs). The Industrial Metals segment offers brass, bronze, and copper alloy rods; brass rod, bar, and shapes; cold-form aluminum and copper products; high-volume machining of aluminum, steel, brass, and cast-iron impacts and castings for automotive applications; brass and aluminum forgings; brass, aluminum, and stainless steel valves; fluid control solutions; and gas train assembles; specialty copper, copper alloy, and aluminum tube to OEMs in the industrial, construction, plumbing, refrigeration, utility, telecommunication, and electrical transmission and distribution markets, as well as heating, ventilation, and air-conditioning (HVAC) markets. The Climate segment provides valves, protection devices, and brass fittings; and coaxial heat exchangers and twisted tubes to wholesalers and OEMs in the HVAC and refrigeration markets. This segment also manufactures and distributes high-pressure components and accessories, as well as insulated HVAC flexible duct systems. Mueller Industries, Inc. was founded in 1917 and is headquartered in Collierville, Tennessee.

CECO Environmental Corp. provides critical solutions in industrial air quality, industrial water treatment, and energy transition solutions in the United States, the United Kingdom, the Netherlands, China, and internationally. It operates through Engineered Systems and Industrial Process Solutions segments. The company offers emissions management, fluid bed cyclones, thermal acoustics, and separation and filtration solutions; engineering services and environmental systems; and industrial exhaust air contamination treatment and control systems, solutions, and services, as well as intelligent control solutions. It also provides engineered and configured products and solutions, including dampers and diverters, expansion joints, selective catalytic reduction systems, severe-service and industrial cyclones, dust collectors, thermal oxidizers, filtration systems, wet and dry scrubbers, separators and coalescers, water treatment packages, metallic and non-metallic pumps, industrial silencers, and fluid handling equipment, as well as plant engineering services and engineered design build fabrication services. In addition, the company offers solutions for air pollution and contamination control, fluid handling, and process filtration in various applications, such as aluminum beverage can production, automobile production, food and beverage processing, semiconductor fabrication, electronics production, steel and aluminum mill processing, wood manufacturing, desalination, and aquaculture markets, as well as it provides engineered industrial process heating solutions for process industries. It markets its power generation, hydrocarbon processing, water/wastewater treatment, oily water separation and treatment, marine and naval vessels, and midstream oil and gas sectors. CECO Environmental Corp. was founded in 1869 and is headquartered in Addison, Texas.

Latest Machinery and Mueller Industries, Inc., CECO Environmental Corp. Stock News

As of October 12, 2026, Mueller Industries, Inc. had a $13.5 billion market capitalization, compared to the Machinery median of $3.4 million. Mueller Industries, Inc.’s stock is up 7.2% in 2026, down 2.6% in the previous five trading days and up 24.3% in the past year.

Currently, Mueller Industries, Inc.’s price-earnings ratio is 15.9. Mueller Industries, Inc.’s trailing 12-month revenue is $4.7 billion with a 18.2% net profit margin. Year-over-year quarterly sales growth most recently was 25.5%. Analysts expect adjusted earnings to reach $4.350 per share for the current fiscal year. Mueller Industries, Inc. currently has a 1.1% dividend yield.

As of October 12, 2026, CECO Environmental Corp. had a $3.8 billion market cap, putting it in the 64th percentile of all stocks. CECO Environmental Corp.’s stock is up 12.5% in 2026, down 10.8% in the previous five trading days and up 29.25% in the past year.

Currently, CECO Environmental Corp. does not have a price-earnings ratio. CECO Environmental Corp.’s trailing 12-month revenue is $903.2 million with a -3.4% net profit margin. Year-over-year quarterly sales growth most recently was 53.7%. Analysts expect adjusted earnings to reach $2.298 per share for the current fiscal year. CECO Environmental Corp. does not currently pay a dividend.

How We Compare Mueller Industries, Inc. and CECO Environmental Corp. Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Mueller Industries, Inc. and CECO Environmental Corp.’s stock grades to see how they measure up against one another.

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Mueller Industries, Inc. and CECO Environmental Corp. Growth Grades

Company	Ticker	Growth
Mueller Industries, Inc.	MLI	A
CECO Environmental Corp.	CECO	B

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Mueller Industries, Inc. has a Growth Score of 82, which is Very Strong. CECO Environmental Corp. has a Growth Score of 69, which is Strong.

The Growth Grade Winner: Mueller Industries, Inc.

As you can clearly see from the Growth Grade breakdown above, Mueller Industries, Inc. has a more attractive growth grade than CECO Environmental Corp.. For investors who focus solely on how a company is growing relative to other companies in the same industry, Mueller Industries, Inc. could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Mueller Industries, Inc. and CECO Environmental Corp.’s Momentum Grades

Company	Ticker	Momentum
Mueller Industries, Inc.	MLI	B
CECO Environmental Corp.	CECO	C

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Mueller Industries, Inc. has a Momentum Score of 69, which is Strong. CECO Environmental Corp. has a Momentum Score of 56, which is Average.

The Momentum Grade Winner: Mueller Industries, Inc.

As you can clearly see from the Momentum Grade breakdown above, Mueller Industries, Inc. is considered to have stronger momentum compared to CECO Environmental Corp.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Mueller Industries, Inc. could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Mueller Industries, Inc. and CECO Environmental Corp.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Mueller Industries, Inc.	MLI	B
CECO Environmental Corp.	CECO	C

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

Mueller Industries, Inc. has a Earnings Estimate Score of 80, which is Positive. CECO Environmental Corp. has a Earnings Estimate Score of 59, which is Neutral.

The Earnings Estimate Revisions Grade Winner: Mueller Industries, Inc.

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, Mueller Industries, Inc. has a better Earnings Estimate Revisions Grade than CECO Environmental Corp.. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, Mueller Industries, Inc. could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Mueller Industries, Inc. and CECO Environmental Corp. Grades

In addition to Growth, Momentum and Estimate Revisions, A+ Investor also provides grades for Value and Quality.

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Mueller Industries, Inc. and CECO Environmental Corp. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Mueller Industries, Inc. or CECO Environmental Corp. Stock?

Overall, Mueller Industries, Inc. stock has a Growth Score of 82, Momentum Score of 69 and Estimate Revisions Score of 80.

CECO Environmental Corp. stock has a Growth Score of 69, Momentum Score of 56 and Estimate Revisions Score of 59.

Comparing Mueller Industries, Inc. and CECO Environmental Corp.’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.