• If you are wondering whether MasTec at around US$374.73 is still offering value after a strong run, this article walks through the key numbers so you can judge for yourself.
• The stock has pulled back slightly, with returns down 2.2% over the last week and down 14.3% over the last month, but year to date it is up 64.6% and up 134.9% over the past year, with a 238.1% return over three years and 218.3% over five years.
• Recent coverage has focused on MasTec's role in large scale infrastructure and energy related projects, as well as the broader interest in companies linked to grid, telecom and clean energy build outs. This attention helps frame why the stock has had strong multi year returns while also seeing short term swings.
• Even so, MasTec only scores 1 out of 6 on Simply Wall St's valuation checks, as shown by its valuation score. The next sections will compare different valuation approaches and then finish with a framework that can help you see beyond any single metric.

MasTec scores just 1/6 on our valuation checks. See what other red flags we found in the full valuation breakdown.

Approach 1: MasTec Discounted Cash Flow (DCF) Analysis

A Discounted Cash Flow, or DCF, model estimates what a stock could be worth by projecting future cash flows and then discounting them back to today’s value using a required rate of return. It is essentially asking what MasTec’s future cash generation is worth in today’s dollars.

MasTec’s latest twelve month free cash flow is reported at about $322.6 million. Analyst based projections and Simply Wall St extrapolations point to free cash flow of $1.732 billion by 2030, with a detailed path of forecast and extrapolated cash flows laid out year by year between 2026 and 2035. These projections are then discounted using a 2 Stage Free Cash Flow to Equity model.

On this basis, the DCF model arrives at an estimated intrinsic value of $372.58 per share. Against a current share price of around $374.73, the model suggests MasTec is about 0.6% above this estimate, which indicates the stock is trading very close to the DCF fair value.

Result: ABOUT RIGHT

MasTec is fairly valued according to our Discounted Cash Flow (DCF), but this can change at a moment's notice. Track the value in your watchlist or portfolio and be alerted on when to act.

Approach 2: MasTec Price vs Earnings

For profitable companies, the P/E ratio is a useful yardstick because it links what you pay for the stock to the earnings the business is already generating. You can think of it as a shorthand for how many years of current earnings the market is pricing in.

What counts as a “normal” P/E depends on what investors expect from future growth and how much risk they are taking on. Higher expected growth or lower perceived risk can support a higher P/E, while slower growth or higher risk usually call for a lower one.

MasTec currently trades on a P/E of 64.95x. That sits above the Construction industry average of 48.74x and the peer average of 50.57x, which on their own might make the stock look expensive.

Simply Wall St’s Fair Ratio aims to refine that picture. It is a proprietary estimate of what MasTec’s P/E “should” be, given factors such as its earnings growth, industry, profit margin, market cap and specific risks. Because it adjusts for these company level features, it can be more informative than a simple comparison with peers or the broad industry.

MasTec’s Fair Ratio is 40.16x, which is well below the current P/E of 64.95x. This suggests the stock is trading above this model based estimate of fair value.

Result: OVERVALUED

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Upgrade Your Decision Making: Choose your MasTec Narrative

Earlier it was mentioned that there is an even better way to understand valuation. This is where Narratives come in, giving you a simple story to attach to your numbers by linking what you believe about MasTec’s future revenue, earnings and margins to a financial forecast, and then to a fair value that you can compare with the current share price to decide whether it looks attractive, fully priced or stretched.

On Simply Wall St’s Community page you can use Narratives as an easy tool, already used by millions of investors, to set out your own view. You can then see how your fair value responds as new information such as earnings or news is added automatically.

For MasTec, one investor might build a bullish Narrative around record backlog, data center and grid projects, and arrive at a higher fair value such as US$545. Another investor might focus on execution risks, dependence on certain segments and political uncertainty, and land closer to a cautious figure like US$325. Those two Narratives sit side by side so you can decide which story feels closer to your own expectations.

For MasTec, however, we'll make it really easy for you with previews of two leading MasTec Narratives:

Fair value used in this bullish Narrative: US$545.00 per share

Gap to this fair value from the latest close of US$374.73: around 31.3% below that Narrative fair value

Revenue growth assumption in this Narrative: about 18.5% a year

• Backlog across energy, communications and power infrastructure, plus data center and grid projects, is used to support higher revenue, EBITDA and earnings per share targets through the rest of the decade.
• Analysts in this camp assume margins rise from 2.9% to 5.2% by 2029 and that MasTec could earn about US$1.3b, with the stock valued on a future P/E of 42.7x, discounted at 9.11%.
• The bullish view leans on long term demand for renewables, power delivery and digital connectivity, while flagging risks such as fossil fuel exposure, execution challenges, technology shifts and tighter ESG rules.

Fair value used in this bearish Narrative: US$325.05 per share

Gap to this fair value from the latest close of US$374.73: around 15.3% above that Narrative fair value

Revenue growth assumption in this Narrative: about 12.2% a year

• This view leans on more cautious revenue and margin assumptions, with earnings modeled at about US$848.8m by 2029, a margin lift to 3.9% and a lower future P/E of 39.4x, discounted at 9.1%.
• Analysts here focus on potential earnings pressure from the pipeline segment as large projects complete, while depending more on communications and power delivery demand that could come in below expectations if conditions soften.
• They also highlight risks around political decisions, project timing, backlog lumpiness and execution, which could leave current market expectations looking too optimistic if revenue or margins fall short.

In the end, these Narratives are tools to help you decide which assumptions about MasTec's revenue, margins and valuation feel closest to your own view, and whether today’s price fits better with the bullish or the more cautious story.

Do you think there's more to the story for MasTec? Head over to our Community to see what others are saying!

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.