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 Comfort Systems USA, Inc. or Fluor 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 Comfort Systems USA, Inc. and Fluor Corporation compare based on key financial metrics to determine which better meets your investment needs.

About Comfort Systems USA, Inc. and Fluor Corporation

Comfort Systems USA, Inc., together with its subsidiaries, provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States. The company operates through two segments: Mechanical and Electrical. It offers heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping and controls, off-site construction, monitoring, and fire protection. The company is also involved in the design, engineering, integration, installation, and start-up of mechanical, electrical, and plumbing (MEP) and related systems in new buildings; and renovation, expansion, maintenance, monitoring, repair, and replacement of systems in existing buildings. In addition, it provides remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems. The company serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.

Fluor Corporation provides engineering, procurement, and construction (EPC); fabrication and modularization; and project management services worldwide. The company operates through three segments: Urban Solutions, Energy Solutions, and Mission Solutions. The Urban Solutions segment offers EPC and project management services to the advanced technologies and manufacturing, life sciences, mining and metals, and infrastructure industries. This segment also provides professional staffing services to the company and third-party clients with technical, professional, and craft resources on a contract or permanent placement basis, as well as maintenance services. The Energy Solutions segment offers EPC services for traditional oil and gas markets, including the production and fuels, chemicals, LNG, and power markets. This segment also provides solutions to the energy transition markets, including nuclear power and other low-carbon energy sources, asset decarbonization, carbon capture, renewable fuels, waste-to-energy, green chemicals, and hydrogen; and consulting services, such as feasibility studies, process assessments, and project finance structuring. The Mission Solutions segment offers technical solutions to the U.S. and other governments, as well as it provides site management, environmental remediation, and decommissioning for nuclear remediation at governmental facilities, as well as services to commercial nuclear clients. It also delivers solutions for nuclear security and operation, nuclear waste management, and laboratory management; and operation and maintenance, logistics, EPC, and life support solutions for mission-critical facilities across U.S. military service organizations. The company was founded in 1912 and is headquartered in Irving, Texas.

Latest Construction & Engineering and Comfort Systems USA, Inc., Fluor Corporation Stock News

As of September 2, 2026, Comfort Systems USA, Inc. had a $54.8 billion market capitalization, compared to the Construction & Engineering median of $3.0 million. Comfort Systems USA, Inc.’s stock is up 68% in 2026, down 2.9% in the previous five trading days and up 123.32% in the past year.

Currently, Comfort Systems USA, Inc.’s price-earnings ratio is 38.4. Comfort Systems USA, Inc.’s trailing 12-month revenue is $11.2 billion with a 12.8% net profit margin. Year-over-year quarterly sales growth most recently was 50.3%. Analysts expect adjusted earnings to reach $49.007 per share for the current fiscal year. Comfort Systems USA, Inc. currently has a 0.2% dividend yield.

As of September 2, 2026, Fluor Corporation had a $7.6 billion market cap, putting it in the 73rd percentile of all stocks. Fluor Corporation’s stock is up 43% in 2026, up 4.7% in the previous five trading days and up 35.6% in the past year.

Currently, Fluor Corporation does not have a price-earnings ratio. Fluor Corporation’s trailing 12-month revenue is $15.5 billion with a -12.8% net profit margin. Year-over-year quarterly sales growth most recently was 8.8%. Analysts expect adjusted earnings to reach $2.706 per share for the current fiscal year. Fluor Corporation does not currently pay a dividend.

How We Compare Comfort Systems USA, Inc. and Fluor 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 Comfort Systems USA, Inc. and Fluor Corporation’s stock grades to see how they measure up against one another.

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Comfort Systems USA, Inc. and Fluor Corporation Stock Value Grades

Company	Ticker	Value
Comfort Systems USA, Inc.	FIX	F
Fluor Corporation	FLR	A

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.

Comfort Systems USA, Inc. has a Value Score of 15, which is Ultra Expensive. Fluor Corporation has a Value Score of 86, which is Deep Value.

The Value Stock Winner: Fluor Corporation

As you can clearly see from the Value Grade breakdown above, Fluor Corporation is considered to have better value than Comfort Systems USA, Inc.. For investors who focus solely on a company’s valuation, Fluor Corporation 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.

Comfort Systems USA, Inc. and Fluor Corporation’s Quality Grades

Company	Ticker	Quality
Comfort Systems USA, Inc.	FIX	A
Fluor Corporation	FLR	B

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.

Comfort Systems USA, Inc. has a Quality Score of 95, which is Very Strong. Fluor Corporation has a Quality Score of 62, which is Strong.

The Quality Grade Winner: Comfort Systems USA, Inc.

As you can clearly see from the Quality Grade breakdown above, Comfort Systems USA, Inc. has a better overall quality grade than Fluor Corporation. For investors who are looking for companies with higher quality than others in the same industry, Comfort Systems USA, Inc. 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.

Comfort Systems USA, Inc. and Fluor Corporation’s Momentum Grades

Company	Ticker	Momentum
Comfort Systems USA, Inc.	FIX	A
Fluor Corporation	FLR	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%.

Comfort Systems USA, Inc. has a Momentum Score of 84, which is Very Strong. Fluor Corporation has a Momentum Score of 68, which is Strong.

The Momentum Grade Winner: Comfort Systems USA, Inc.

As you can clearly see from the Momentum Grade breakdown above, Comfort Systems USA, Inc. is considered to have stronger momentum compared to Fluor Corporation. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Comfort Systems USA, Inc. 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.

Other Comfort Systems USA, Inc. and Fluor Corporation Grades

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

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.

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 Comfort Systems USA, Inc. and Fluor Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Comfort Systems USA, Inc. or Fluor Corporation Stock?

Overall, Comfort Systems USA, Inc. stock has a Value Score of 15, Momentum Score of 84 and Quality Score of 95.

Fluor Corporation stock has a Value Score of 86, Momentum Score of 68 and Quality Score of 62.

Comparing Comfort Systems USA, Inc. and Fluor 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.