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 Alamo Group Inc. or Pentair plc 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 Alamo Group Inc. and Pentair plc compare based on key financial metrics to determine which better meets your investment needs.

About Alamo Group Inc. and Pentair plc

Alamo Group Inc. manufactures and sells industrial and vegetation management equipment for governmental, industrial, and agricultural uses worldwide. It operates in two segments, Vegetation Management and Industrial Equipment. The Vegetation Management segment offers tractor powered equipment such as rotary, finishing, flail, and disc mowers; rotary cutters; front end loaders, backhoes, tillers, posthole diggers, scraper blades, cultivators, subsoilers, and other tractor attachments and implements. This segment also provides commercial and residential zero turn mowers; hydraulic and mechanical boom and reach mowers; hedge and hedgerow cutters; industrial grass mowers; seedbed preparation equipment; and forestry and tree care tools, including chippers, stump grinders, mulchers, brush cutters, flails, and debarkers, as well as remote control mowers and related replacement parts. Its Industrial Equipment segment offers hydraulic telescoping booms; catch basin and roadway debris vacuum systems; sewer cleaners; vacuum trucks, combination sewer cleaners, hydro excavators, trenchers, and high pressure cleaning systems; truck mounted snow plows, blowers, dump bodies, spreaders, deicers, brine sprayers, snow throwers, and wing systems; salt spreaders; street sweepers, including mechanical broom and regenerative air models; leaf and debris collection equipment and replacement brooms; solid waste and recycling equipment; municipal tractors and attachments; asphalt patchers; underground construction forms; traffic control and crash attenuator trucks; industrial vacuum excavation units; trailer mounted and custom truck mounted systems; and related accessories and truck up fitting services. The company serves the infrastructure building and maintenance, industrial construction, public works, land maintenance, agriculture, and tree care markets. Alamo Group Inc. was founded in 1955 and is headquartered in Seguin, Texas.

Pentair plc provides various water solutions in the United States, Western Europe, China, Latin America, the Middle East, Southeast Asia, Australia, and Canada. It operates through three segments: Flow, Water Solutions, and Pool. The Flow segment designs, manufactures, and sells fluid treatment and pump products and systems, including pressure vessels, gas recovery solutions, membrane bioreactors, wastewater reuse systems and advanced membrane filtration, separation systems, specialty insertion valves, water disposal pumps, water supply pumps, fluid transfer pumps, turbine pumps, solid handling pumps, and agricultural spray nozzles. This segment provides products under Pentair Flow, Aurora, Berkeley, Codeline, Fairbanks-Nijhuis, Haffmans, Hydromatic, Hypro, Jung Pumpen, Myers, Sta-Rite, Shurflo, Südmo, and X-Flow brand names. The Water Solutions segment offers commercial and residential water treatment products and systems, such as pressure tanks, control valves, activated carbon products, commercial ice machines, conventional filtration products, and point-of-entry and point-of-use water treatment systems for use in water filtration and water softening solutions, as well as commercial water management and filtration solutions in foodservice operations; and installation and preventative services for water management solutions for commercial operators under the Pentair Water Solutions, Everpure, Fleck, Manitowoc Ice, Pentek, and RainSoft brands. The Pool segment provides residential and commercial pool equipment and accessories, including pumps, filters, heaters, lights, automatic controls and cleaners, chlorinators, maintenance equipment, and pool accessories for residential and commercial pool maintenance, pool repair, renovation, service, construction, and aquaculture solutions. This segment offers products under the Pentair Pool, Kreepy Krauly, Pleatco, and Sta-Rite brands. Pentair plc was founded in 1966 and is headquartered in London, the United Kingdom.

Latest Machinery and Alamo Group Inc., Pentair plc Stock News

As of August 31, 2026, Alamo Group Inc. had a $2.0 billion market capitalization, compared to the Machinery median of $3.8 million. Alamo Group Inc.’s stock is NA in 2026, NA in the previous five trading days and down 23.46% in the past year.

Currently, Alamo Group Inc.’s price-earnings ratio is 19.7. Alamo Group Inc.’s trailing 12-month revenue is $1.7 billion with a 6.1% net profit margin. Year-over-year quarterly sales growth most recently was 7.5%. Analysts expect adjusted earnings to reach $10.554 per share for the current fiscal year. Alamo Group Inc. currently has a 0.8% dividend yield.

Currently, Pentair plc’s price-earnings ratio is 15.6. Pentair plc’s trailing 12-month revenue is $4.0 billion with a 16.2% net profit margin. Year-over-year quarterly sales growth most recently was -17.0%. Analysts expect adjusted earnings to reach $4.644 per share for the current fiscal year. Pentair plc currently has a 1.8% dividend yield.

How We Compare Alamo Group Inc. and Pentair plc 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 Alamo Group Inc. and Pentair plc’s stock grades to see how they measure up against one another.

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Alamo Group Inc. and Pentair plc Stock Value Grades

Company	Ticker	Value
Alamo Group Inc.	ALG	C
Pentair plc	PNR	C

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.

Alamo Group Inc. has a Value Score of 54, which is Average. Pentair plc has a Value Score of 51, which is Average.

The Value Stock Winner: No Clear Winner

Neither Alamo Group Inc. or Pentair plc 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 Alamo Group Inc. or Pentair plc is the better investment when it comes to value.

Alamo Group Inc. and Pentair plc Growth Grades

Company	Ticker	Growth
Alamo Group Inc.	ALG	B
Pentair plc	PNR	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.

Alamo Group Inc. has a Growth Score of 77, which is Strong. Pentair plc has a Growth Score of 77, which is Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both Alamo Group Inc. and Pentair plc have a grade of B. For investors who focus solely on a company’s upward growth, further research should be conducted into both companies’ other financial metrics before deciding whether to invest.

Alamo Group Inc. and Pentair plc’s Quality Grades

Company	Ticker	Quality
Alamo Group Inc.	ALG	C
Pentair plc	PNR	A

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks 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 the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Alamo Group Inc. has a Quality Score of 60, which is Average. Pentair plc has a Quality Score of 91, which is Very Strong.

The Quality Grade Winner: Pentair plc

As you can clearly see from the Quality Grade breakdown above, Pentair plc has a better overall quality grade than Alamo Group Inc.. For investors who are looking for companies with higher quality than others in the same industry, Pentair plc could be a good stock to add to their portfolios. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Alamo Group Inc. and Pentair plc Grades

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

Momentum grades help 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.

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

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 Alamo Group Inc. and Pentair plc pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Alamo Group Inc. or Pentair plc Stock?

Overall, Alamo Group Inc. stock has a Value Score of 54, Growth Score of 77 and Quality Score of 60.

Pentair plc stock has a Value Score of 51, Growth Score of 77 and Quality Score of 91.

Comparing Alamo Group Inc. and Pentair plc’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.