Sifting through countless of stocks in the Construction & Engineering 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 MasTec, Inc., Quanta Services 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 MasTec, Inc., Quanta Services and Inc. compare based on key financial metrics to determine which better meets your investment needs.

About MasTec, Inc., Quanta Services and Inc.

MasTec, Inc., an infrastructure engineering and construction company, provides engineering, building, installation, maintenance, and upgrade services for communications, energy, utility, and other infrastructure primarily in the United States and Canada. It operates through five segments: Communications, Clean Energy and Infrastructure, Power Delivery, Pipeline Infrastructure, and Other. The company builds infrastructure for wireless and wireline/fiber communications; clean energy infrastructure comprising renewable energy power generation; pipeline infrastructure, including natural gas, water, carbon capture sequestration, and other product transport; power delivery services, such as electrical and gas transmission, and distribution systems; industrial and heavy civil infrastructure, including roads, bridges, and rail; and water infrastructure. It also installs electrical and other gas distribution and transmission systems, power generation, civil and industrial facilities, pipelines, and fiber optic and other cables, as well as install-to-the-home services. In addition, the company offers maintenance and upgrade support services comprising maintenance of customers’ distribution facilities, networks, and infrastructure, including communications, power generation, pipeline, electrical distribution and transmission, and civil and industrial infrastructure; emergency restoration services for natural disasters and accidents; and routine replacements and upgrades to overhauls. Its customers include wireless and wireline/fiber service providers, broadband operators, install-to-the-home service providers, public and private energy providers, including renewable and other energy providers, pipeline operators, civil, transportation, and water and wastewater pipeline installation services, industrial infrastructure providers, as well as government entities. MasTec, Inc. was founded in 1929 and is headquartered in Coral Gables, Florida.

Quanta Services, Inc. offers infrastructure solutions for the electric and gas utility, power generation, load center, manufacturing, communications, pipeline, and energy industries. The company’s Electric Infrastructure Solutions segment engages in the design, procurement, construction, upgrade, repair, and maintenance of electric power transmission and distribution infrastructure and substation facilities; installation, maintenance, and upgrade of electric power infrastructure projects; installation of smart grid technologies on electric power networks; and design, installation, maintenance, and repair of commercial and industrial wirings. This segment offers aviation; emergency aerial firefighting services; emergency restoration; and other engineering and technical services; design and construction solutions to wireline and wireless communications, cable multi-system operators, technology companies, and other customers; engineering, procurement, new construction, and repair and maintenance services for renewable generation facilities; and training for electric workers, as well as training for the gas distribution and communications industries. Its Underground Utility and Infrastructure Solutions segment is involved in the transportation, distribution, storage, development, and processing of natural gas, oil, and other products, as well as owns and operates large load centers. This segment also engages in the design, engineering, procurement, construction, upgrade, and repair and maintenance services for natural gas systems; pipeline protection, integrity testing, rehabilitation, and replacement services; and catalyst replacement, high-pressure and critical-path turnaround, instrumentation and electrical, piping, fabrication, and storage tank services. The company was formerly known as Fabal Construction, Inc. and changed its name to Quanta Services, Inc. in November 1997. The company was incorporated in 1997 and is headquartered in Houston, Texas.

Latest Construction & Engineering and MasTec, Inc., Quanta Services, Inc. Stock News

As of June 1, 2026, MasTec, Inc. had a $28.2 billion market capitalization, compared to the Construction & Engineering median of $3.8 million. MasTec, Inc.’s stock is up 66.9% in 2026, down 7.1% in the previous five trading days and up 132.01% in the past year.

Currently, MasTec, Inc.’s price-earnings ratio is 63.4. MasTec, Inc.’s trailing 12-month revenue is $15.3 billion with a 2.9% net profit margin. Year-over-year quarterly sales growth most recently was 34.5%. Analysts expect adjusted earnings to reach $8.835 per share for the current fiscal year. MasTec, Inc. does not currently pay a dividend.

As of June 1, 2026, Quanta Services, Inc. had a $103.2 billion market cap, putting it in the 97th percentile of all stocks. Quanta Services, Inc.’s stock is up 64.9% in 2026, down 6.2% in the previous five trading days and up 102.36% in the past year.

Currently, Quanta Services, Inc.’s price-earnings ratio is 94.4. Quanta Services, Inc.’s trailing 12-month revenue is $30.1 billion with a 3.7% net profit margin. Year-over-year quarterly sales growth most recently was 26.3%. Analysts expect adjusted earnings to reach $14.022 per share for the current fiscal year. Quanta Services, Inc. currently has a 0.1% dividend yield.

How We Compare MasTec, Inc., Quanta Services 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 MasTec, Inc., Quanta Services and Inc.’s stock grades to see how they measure up against one another.

Learn more about A+ Investor here!

Sign Up to Receive a Free Special Report Showing How A+ Grades Can Help You Make Smarter Investment Decisions

MasTec, Inc., Quanta Services and Inc. Growth Grades

Company	Ticker	Growth
MasTec, Inc.	MTZ	A
Quanta Services, Inc.	PWR	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.

MasTec, Inc. has a Growth Score of 89, which is Very Strong. Quanta Services, Inc. has a Growth Score of 69, which is Strong.

The Growth Grade Winner: MasTec, Inc.

As you can clearly see from the Growth Grade breakdown above, MasTec, Inc. has a more attractive growth grade than Quanta Services, Inc.. For investors who focus solely on how a company is growing relative to other companies in the same industry, MasTec, Inc. could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

MasTec, Inc., Quanta Services and Inc.’s Momentum Grades

Company	Ticker	Momentum
MasTec, Inc.	MTZ	A
Quanta Services, Inc.	PWR	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%.

MasTec, Inc. has a Momentum Score of 86, which is Very Strong. Quanta Services, Inc. has a Momentum Score of 82, which is Very Strong.

The Momentum Grade Winner: It’s a Tie!

Looking at the Momentum Grade breakdown above, both MasTec, Inc., Quanta Services and Inc. have a grade of A. 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.

MasTec, Inc., Quanta Services and Inc.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
MasTec, Inc.	MTZ	B
Quanta Services, Inc.	PWR	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.

MasTec, Inc. has a Earnings Estimate Score of 74, which is Positive. Quanta Services, Inc. has a Earnings Estimate Score of 73, which is Positive.

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

Looking at the Earnings Estimate Revisions Grade breakdown above, both MasTec, Inc., Quanta Services 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 MasTec, Inc., Quanta Services or Inc. is a better fit.

Other MasTec, Inc., Quanta Services and Inc. Grades

In addition to Momentum, Estimate Revisions 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 MasTec, Inc., Quanta Services and Inc. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, MasTec, Inc., Quanta Services or Inc. Stock?

Overall, MasTec, Inc. stock has a Growth Score of 89, Momentum Score of 86 and Estimate Revisions Score of 74.

Quanta Services, Inc. stock has a Growth Score of 69, Momentum Score of 82 and Estimate Revisions Score of 73.

Comparing MasTec, Inc., Quanta Services 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.