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 Pentair plc or Standex International Corporation 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 Pentair plc and Standex International Corporation compare based on key financial metrics to determine which better meets your investment needs.

About Pentair plc and Standex International Corporation

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.

Standex International Corporation manufactures and sells products and services for commercial and industrial markets in the United States and internationally. It operates through Electronics, Engineering Technologies, Scientific, Engraving, and Specialty Solutions segments. The company offers reed relays, fluid level, proximity, motion, flow, HVAC condensate, custom electronic and current sensors, instrument transformers, wound transformers, bushings, inductors, current sense and planar transformer technology, value added assemblies, mechanical packaging applications under the Standex Electronics, Standex-Meder Electronics, Renco Electronics, Northlake Engineering, Agile Magnetics, Sensor Solutions, Standex Electronics Japan, Minntronix, Nascentechnology, Sanyu, Amran Instruments, and Narayan Powertech brands. It also provides mold texturizing, slush molding tools, project management and design services, roll engraving, hygiene product tooling, low observation vents for stealth aircraft, and process machinery services under the Piazza Rosa, World Client Services, Tenibac-Graphion, GS Engineering, and Innovent brands. In addition, it provides specialty temperature-controlled equipment for medical, scientific, pharmaceutical, biotech, and industrial markets under the American BioTech Supply, Lab Research Products, Corepoint, Cryosafe, CryoGuard, and Custom Biogenic Systems brands; and net and near net formed single-source customized solutions for the aviation, aerospace, defense, energy, industrial, medical, marine, oil and gas, and manned and unmanned space markets under the Spincraft and McStarlite brands. Further, it offers refrigerated, heated, display cases, single and double acting telescopic, and piston rod hydraulic cylinders under the Federal and Custom Hoist brands. The company was founded in 1955 and is headquartered in Salem, New Hampshire.

Latest Machinery and Pentair plc, Standex International Corporation Stock News

As of July 31, 2026, Pentair plc had a $10.4 billion market capitalization, compared to the Machinery median of $3.9 million. Pentair plc’s stock is down 37.2% in 2026, up 4.1% in the previous five trading days and down 35.4% in the past year.

Currently, Pentair plc’s price-earnings ratio is 16.9. 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 $4.647 per share for the current fiscal year. Pentair plc currently has a 1.7% dividend yield.

As of July 31, 2026, Standex International Corporation had a $3.6 billion market cap, putting it in the 62nd percentile of all stocks. Standex International Corporation’s stock is up 36.5% in 2026, down 2.4% in the previous five trading days and up 79.57% in the past year.

Currently, Standex International Corporation’s price-earnings ratio is 36.1. Standex International Corporation’s trailing 12-month revenue is $885.4 million with a 11.7% net profit margin. Year-over-year quarterly sales growth most recently was 8.1%. Analysts expect adjusted earnings to reach $8.662 per share for the current fiscal year. Standex International Corporation currently has a 0.5% dividend yield.

How We Compare Pentair plc and Standex International Corporation 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 Pentair plc and Standex International Corporation’s stock grades to see how they measure up against one another.

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Pentair plc and Standex International Corporation Growth Grades

Company	Ticker	Growth
Pentair plc	PNR	B
Standex International Corporation	SXI	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.

Pentair plc has a Growth Score of 77, which is Strong. Standex International Corporation has a Growth Score of 73, which is Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both Pentair plc and Standex International Corporation 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.

Pentair plc and Standex International Corporation’s Momentum Grades

Company	Ticker	Momentum
Pentair plc	PNR	F
Standex International Corporation	SXI	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%.

Pentair plc has a Momentum Score of 17, which is Very Weak. Standex International Corporation has a Momentum Score of 86, which is Very Strong.

The Momentum Grade Winner: Standex International Corporation

As you can clearly see from the Momentum Grade breakdown above, Standex International Corporation is considered to have stronger momentum compared to Pentair plc. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Standex International Corporation 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.

Pentair plc and Standex International Corporation’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Pentair plc	PNR	C
Standex International Corporation	SXI	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.

Pentair plc has a Earnings Estimate Score of 42, which is Neutral. Standex International Corporation has a Earnings Estimate Score of 44, which is Neutral.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither Pentair plc or Standex International Corporation has an Earnings Estimate Revisions Grade that could be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Pentair plc or Standex International Corporation is the better investment when it comes to estimate revisions.

Other Pentair plc and Standex International Corporation Grades

In addition to Estimate Revisions, Momentum and Growth, 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 Pentair plc and Standex International Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Pentair plc or Standex International Corporation Stock?

Overall, Pentair plc stock has a Growth Score of 77, Momentum Score of 17 and Estimate Revisions Score of 42.

Standex International Corporation stock has a Growth Score of 73, Momentum Score of 86 and Estimate Revisions Score of 44.

Comparing Pentair plc and Standex International Corporation’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.