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 The Gorman-Rupp Company 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 The Gorman-Rupp Company compare based on key financial metrics to determine which better meets your investment needs.

About Mueller Industries, Inc. and The Gorman-Rupp Company

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.

The Gorman-Rupp Company designs, manufactures, and sells pumps and pump systems in the United States and internationally. The company offers self-priming centrifugal, standard centrifugal, magnetic drive centrifugal, axial and mixed flow, vertical turbine line shaft, submersible, high-pressure booster, rotary gear, rotary vein, diaphragm, bellows, and oscillating pumps. Its products are used in water, wastewater, construction, dewatering, industrial, petroleum, chemical processing, original equipment, agriculture, fire suppression, heating, ventilating and air conditioning, military, and other liquid-handling applications. The company markets its products through a network of distributors, manufacturers’ representatives, third-party distributor catalogs, direct sales, retailers, and e-commerce. The Gorman-Rupp Company was founded in 1933 and is headquartered in Mansfield, Ohio.

Latest Machinery and Mueller Industries, Inc., The Gorman-Rupp Company Stock News

As of August 21, 2026, Mueller Industries, Inc. had a $14.0 billion market capitalization, compared to the Machinery median of $3.7 million. Mueller Industries, Inc.’s stock is up 10.1% in 2026, down 4.1% in the previous five trading days and up 37.95% in the past year.

Currently, Mueller Industries, Inc.’s price-earnings ratio is 16.5. 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 $4.200 per share for the current fiscal year. Mueller Industries, Inc. currently has a 1.1% dividend yield.

As of August 21, 2026, The Gorman-Rupp Company had a $2.1 billion market cap, putting it in the 54th percentile of all stocks. The Gorman-Rupp Company’s stock is up 63.5% in 2026, down 3.4% in the previous five trading days and up 89.4% in the past year.

Currently, The Gorman-Rupp Company’s price-earnings ratio is 33.0. The Gorman-Rupp Company’s trailing 12-month revenue is $702.1 million with a 8.9% net profit margin. Year-over-year quarterly sales growth most recently was 4.0%. Analysts expect adjusted earnings to reach $2.810 per share for the current fiscal year. The Gorman-Rupp Company currently has a 1.0% dividend yield.

How We Compare Mueller Industries, Inc. and The Gorman-Rupp Company 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 The Gorman-Rupp Company’s stock grades to see how they measure up against one another.

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Mueller Industries, Inc. and The Gorman-Rupp Company Stock Value Grades

Company	Ticker	Value
Mueller Industries, Inc.	MLI	C
The Gorman-Rupp Company	GRC	D

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 Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

Mueller Industries, Inc. has a Value Score of 45, which is Average. The Gorman-Rupp Company has a Value Score of 28, which is Expensive.

The Value Stock Winner: No Clear Winner

Neither Mueller Industries, Inc. or The Gorman-Rupp Company has a high enough value grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolio. It’s important to look at a wide range of financial metrics in order to determine if Mueller Industries, Inc. or The Gorman-Rupp Company is the better investment when it comes to value.

Mueller Industries, Inc. and The Gorman-Rupp Company’s Momentum Grades

Company	Ticker	Momentum
Mueller Industries, Inc.	MLI	C
The Gorman-Rupp Company	GRC	A

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 57, which is Average. The Gorman-Rupp Company has a Momentum Score of 82, which is Very Strong.

The Momentum Grade Winner: The Gorman-Rupp Company

As you can clearly see from the Momentum Grade breakdown above, The Gorman-Rupp Company is considered to have stronger momentum compared to Mueller Industries, Inc.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, The Gorman-Rupp Company 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 The Gorman-Rupp Company’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Mueller Industries, Inc.	MLI	D
The Gorman-Rupp Company	GRC	B

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 39, which is Negative. The Gorman-Rupp Company has a Earnings Estimate Score of 70, which is Positive.

The Earnings Estimate Revisions Grade Winner: The Gorman-Rupp Company

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, The Gorman-Rupp Company has a better Earnings Estimate Revisions Grade than Mueller Industries, Inc.. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, The Gorman-Rupp Company 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 The Gorman-Rupp Company Grades

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

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

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 The Gorman-Rupp Company 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 The Gorman-Rupp Company Stock?

Overall, Mueller Industries, Inc. stock has a Value Score of 45, Momentum Score of 57 and Estimate Revisions Score of 39.

The Gorman-Rupp Company stock has a Value Score of 28, Momentum Score of 82 and Estimate Revisions Score of 70.

Comparing Mueller Industries, Inc. and The Gorman-Rupp Company’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.