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 Parker-Hannifin Corporation, Stanley Black & Decker or Inc. 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 Parker-Hannifin Corporation, Stanley Black & Decker and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About Parker-Hannifin Corporation, Stanley Black & Decker and Inc.

Parker-Hannifin Corporation engages in the manufacture and sale of motion and control technologies and systems for aerospace and defense, in-plant and industrial equipment, transportation, off-highway, energy, and HVAC and refrigeration markets in North America, EMEA, Asia Pacific, and Latin America. It operates through two segments: Diversified Industrial and Aerospace Systems. The company offers various motion-control systems and components, such as active and passive vibration control, high purity sealing, coatings, high temperature sealing, cryogenic valves and fittings, HVAC/R controls and monitoring, elastomeric, fabric reinforced, metal, precision cut seals, hydrogen and natural gas filters, electric and hydraulic pumps and motors, industrial air, gas filtration, electric and hydraulic valves, miniature pumps and valves, electromagnetic interface shielding, pneumatic actuators, regulators and valves, electromechanical and hydraulic actuators, power take offs, electronics, drives and controllers, process filtration solutions, engine filtration solutions, rubber to substrate adhesives, fluid condition monitoring, sensors and diagnostics, fluid conveyance hose and tubing, structural adhesives, high pressure connectors, fittings, valves and regulators, thermal management, high purity fittings. The company also provides products for use in commercial and defense airframe and engine programs, such as avionics, electric and hydraulic braking systems, electric power, electromechanical actuators, engine exhaust systems and components, fire detection and suppression, flight control systems, fluid conveyance, fuel systems and components, fuel tank inserting systems, hydraulic pumps and motors, hydraulic valves and actuators, pneumatics, seals, sensors, and thermal management products. The company sells its products to original equipment manufacturers, distributors, direct-sales employees. Parker-Hannifin Corporation was founded in 1917 and is headquartered in Cleveland, Ohio.

Stanley Black & Decker, Inc. provides hand tools, power tools, outdoor products, and related accessories in the United States, Canada, Other Americas, Europe, and Asia. Its Tools & Outdoor segment offers professional grade corded and cordless electric power tools and equipment, including drills, impact wrenches and drivers, grinders, saws, routers, concrete prep and placement tools, and sanders; pneumatic tools and fasteners, such as nail guns, nails, staplers and staples, and concrete and masonry anchors; corded and cordless electric power tools; household power tools, hand-held vacuums, and small appliances; leveling and layout tools, planes, hammers, demolition tools, clamps, vises, knives, saws, chisels, and industrial and automotive tools; drill, screwdriver, router bits, abrasives, saw blades, and threading products; tool boxes, sawhorses, medical cabinets, and engineered storage solutions; and electric and gas-powered lawn and garden products. This segment sells its products under the DEWALT, CRAFTSMAN, CUB ADET, STANLEY, BLACK+DECKER, and HUSTLER brands through retailers, third-party distributors, independent dealers, and a direct sales force. Its Industrial segment provides threaded fasteners, blind rivets and tools, blind inserts and tools, drawn arc weld studs and systems, engineered plastic and mechanical fasteners, self-piercing riveting systems, precision nut running systems, micro fasteners, high-strength structural fasteners, axel swage, latches, heat shields, pins, couplings, fitting, and other engineered products. This segment sells its products through direct sales force and third-party distributors to the automotive, manufacturing, electronics, construction, aerospace, and other industries. The company was formerly known as The Stanley Works and changed its name to Stanley Black & Decker, Inc. in March 2010. The company was founded in 1843 and is headquartered in New Britain, Connecticut.

Latest Machinery and Parker-Hannifin Corporation, Stanley Black & Decker, Inc. Stock News

As of September 2, 2026, Parker-Hannifin Corporation had a $119.7 billion market capitalization, compared to the Machinery median of $4.0 million. Parker-Hannifin Corporation’s stock is up 8.3% in 2026, down 5.9% in the previous five trading days and up 26.6% in the past year.

Currently, Parker-Hannifin Corporation’s price-earnings ratio is 33.3. Parker-Hannifin Corporation’s trailing 12-month revenue is $21.5 billion with a 17.0% net profit margin. Year-over-year quarterly sales growth most recently was 9.8%. Analysts expect adjusted earnings to reach $35.333 per share for the current fiscal year. Parker-Hannifin Corporation currently has a 0.8% dividend yield.

As of September 2, 2026, Stanley Black & Decker, Inc. had a $14.6 billion market cap, putting it in the 82nd percentile of all stocks. Stanley Black & Decker, Inc.’s stock is up 29.9% in 2026, down 2.8% in the previous five trading days and up 35.1% in the past year.

Currently, Stanley Black & Decker, Inc.’s price-earnings ratio is 23.7. Stanley Black & Decker, Inc.’s trailing 12-month revenue is $15.2 billion with a 4.1% net profit margin. Year-over-year quarterly sales growth most recently was 0.4%. Analysts expect adjusted earnings to reach $5.605 per share for the current fiscal year. Stanley Black & Decker, Inc. currently has a 3.5% dividend yield.

How We Compare Parker-Hannifin Corporation, Stanley Black & Decker and Inc. 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 Parker-Hannifin Corporation, Stanley Black & Decker and Inc.’s stock grades to see how they measure up against one another.

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Parker-Hannifin Corporation, Stanley Black & Decker and Inc.’s Quality Grades

Company	Ticker	Quality
Parker-Hannifin Corporation	PH	A
Stanley Black & Decker, Inc.	SWK	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.

Parker-Hannifin Corporation has a Quality Score of 96, which is Very Strong. Stanley Black & Decker, Inc. has a Quality Score of 93, which is Very Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both Parker-Hannifin Corporation, Stanley Black & Decker and Inc. have a grade of A. For investors who focus solely on a company’s overall quality, you will need to conduct further research into both companies to see if they are a good fit for your portfolio. As a good rule of thumb, you should always analyze multiple factors based on a wide range of metrics before choosing a company to invest in.

Parker-Hannifin Corporation, Stanley Black & Decker and Inc.’s Momentum Grades

Company	Ticker	Momentum
Parker-Hannifin Corporation	PH	B
Stanley Black & Decker, Inc.	SWK	B

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%.

Parker-Hannifin Corporation has a Momentum Score of 65, which is Strong. Stanley Black & Decker, Inc. has a Momentum Score of 75, which is Strong.

The Momentum Grade Winner: It’s a Tie!

Looking at the Momentum Grade breakdown above, both Parker-Hannifin Corporation, Stanley Black & Decker and Inc. have a grade of B. For those who focus solely on a company’s momentum, further research will need to be conducted into both companies to see if they fit your individual needs as an investor.

Parker-Hannifin Corporation, Stanley Black & Decker and Inc.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Parker-Hannifin Corporation	PH	B
Stanley Black & Decker, Inc.	SWK	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.

Parker-Hannifin Corporation has a Earnings Estimate Score of 80, which is Positive. Stanley Black & Decker, Inc. has a Earnings Estimate Score of 80, which is Positive.

The Earnings Estimate Revisions Grade Winner: It’s a Tie!

Looking at the Earnings Estimate Revisions Grade breakdown above, both Parker-Hannifin Corporation, Stanley Black & Decker and Inc. have a grade of B. For those focusing solely on a company’s estimate revisions, other financial metrics will need to be evaluated to determine whether Parker-Hannifin Corporation, Stanley Black & Decker or Inc. is a better fit.

Other Parker-Hannifin Corporation, Stanley Black & Decker and Inc. Grades

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

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.

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.

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 Parker-Hannifin Corporation, Stanley Black & Decker and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Parker-Hannifin Corporation, Stanley Black & Decker or Inc. Stock?

Overall, Parker-Hannifin Corporation stock has a Momentum Score of 65, Estimate Revisions Score of 80 and Quality Score of 96.

Stanley Black & Decker, Inc. stock has a Momentum Score of 75, Estimate Revisions Score of 80 and Quality Score of 93.

Comparing Parker-Hannifin Corporation, Stanley Black & Decker and Inc.’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.