Sifting through countless of stocks in the Trading Companies & Distributors 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 W.W. Grainger, Inc., Watsco 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 W.W. Grainger, Inc., Watsco and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About W.W. Grainger, Inc., Watsco and Inc.

W.W. Grainger, Inc., together with its subsidiaries, distributes maintenance, repair, and operating products and services primarily in North America, Japan, and the United Kingdom. The company operates through two segments, High-Touch Solutions North America and Endless Assortment. It provides safety, security, material handling and storage equipment, pumps and plumbing equipment, cleaning and maintenance, and metalworking and hand tools. The company also offers technical support and inventory management services. It serves smaller businesses to large corporations, government entities, and other institutions, as well as commercial, healthcare, and manufacturing industries through sales and service representatives, and electronic and ecommerce channels. W.W. Grainger, Inc. was founded in 1927 and is headquartered in Lake Forest, Illinois.

Watsco, Inc., together with its subsidiaries, engages in the distribution of air conditioning, heating, and refrigeration equipment, and related parts and supplies in the United States, Canada, Latin America, and the Caribbean. It distributes equipment, including residential ducted and ductless air conditioners, such as gas, electric, and oil furnaces; commercial air conditioning and heating equipment systems; and other specialized equipment. The company also offers parts comprising replacement compressors, evaporator coils, motors, and other component parts; and supplies, such as thermostats, insulation materials, refrigerants, ductworks, grills, registers, sheet metals, tools, copper tubing, concrete pads, tapes, adhesives, and other ancillary supplies, as well as plumbing and bathroom remodeling supplies. It serves contractors and dealers that service the replacement and new construction markets for residential and light commercial central air conditioning, heating, and refrigeration systems. Watsco, Inc. was incorporated in 1956 and is headquartered in Miami, Florida.

Latest Trading Companies & Distributors and W.W. Grainger, Inc., Watsco, Inc. Stock News

As of April 17, 2026, W.W. Grainger, Inc. had a $55.0 billion market capitalization, compared to the Trading Companies & Distributors median of $5.6 million. W.W. Grainger, Inc.’s stock is NA in 2026, NA in the previous five trading days and up 16.33% in the past year.

Currently, W.W. Grainger, Inc.’s price-earnings ratio is 32.9. W.W. Grainger, Inc.’s trailing 12-month revenue is $17.9 billion with a 9.5% net profit margin. Year-over-year quarterly sales growth most recently was 4.5%. Analysts expect adjusted earnings to reach $43.647 per share for the current fiscal year. W.W. Grainger, Inc. currently has a 0.8% dividend yield.

Currently, Watsco, Inc.’s price-earnings ratio is 35.1. Watsco, Inc.’s trailing 12-month revenue is $7.2 billion with a 6.9% net profit margin. Year-over-year quarterly sales growth most recently was -10.0%. Analysts expect adjusted earnings to reach $12.574 per share for the current fiscal year. Watsco, Inc. currently has a 3.1% dividend yield.

How We Compare W.W. Grainger, Inc., Watsco 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 W.W. Grainger, Inc., Watsco and Inc.’s stock grades to see how they measure up against one another.

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W.W. Grainger, Inc., Watsco and Inc. Growth Grades

Company	Ticker	Growth
W.W. Grainger, Inc.	GWW	A
Watsco, Inc.	WSO	A

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.

W.W. Grainger, Inc. has a Growth Score of 100, which is Very Strong. Watsco, Inc. has a Growth Score of 95, which is Very Strong.

The Growth Grade Winner: It’s a Tie!

Looking at the Growth Grade breakdown above, both W.W. Grainger, Inc., Watsco and Inc. have a grade of A. 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.

W.W. Grainger, Inc., Watsco and Inc.’s Quality Grades

Company	Ticker	Quality
W.W. Grainger, Inc.	GWW	A
Watsco, Inc.	WSO	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.

W.W. Grainger, Inc. has a Quality Score of 99, which is Very Strong. Watsco, Inc. has a Quality Score of 90, which is Very Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both W.W. Grainger, Inc., Watsco 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.

W.W. Grainger, Inc., Watsco and Inc.’s Momentum Grades

Company	Ticker	Momentum
W.W. Grainger, Inc.	GWW	C
Watsco, Inc.	WSO	D

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%.

W.W. Grainger, Inc. has a Momentum Score of 49, which is Average. Watsco, Inc. has a Momentum Score of 34, which is Weak.

The Momentum Stock Winner: No Clear Winner

Neither W.W. Grainger, Inc., Watsco or Inc. has a strong enough Momentum Grade to 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 W.W. Grainger, Inc., Watsco or Inc. is the better investment when it comes to momentum.

Other W.W. Grainger, Inc., Watsco and Inc. Grades

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

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).

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 W.W. Grainger, Inc., Watsco and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, W.W. Grainger, Inc., Watsco or Inc. Stock?

Overall, W.W. Grainger, Inc. stock has a Growth Score of 100, Momentum Score of 49 and Quality Score of 99.

Watsco, Inc. stock has a Growth Score of 95, Momentum Score of 34 and Quality Score of 90.

Comparing W.W. Grainger, Inc., Watsco 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.