American Tower (AMT) drew investor attention after reporting second quarter 2026 results with higher revenue, net income and earnings per share, alongside updated full year guidance and a completed multi year share repurchase program.

Despite the stronger second quarter earnings and updated 2026 outlook, American Tower’s recent share price performance has been mixed, with the stock down 6.5% over three months and the 1 year total shareholder return down 16.4%. This suggests sentiment has cooled even as the latest numbers reset expectations.

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American Tower shares are trading well below both analyst targets and an internal fair value estimate range based on current assumptions. The next step is to determine where that gap lies and how wide it appears on common valuation measures.

Price to earnings of 23x for American Tower, is it justified?

On the surface, American Tower looks inexpensive compared to several valuation anchors, including an internal fair value estimate and analyst targets, and that picture is reinforced by its P/E ratio. The stock most recently closed at $168.07, which sits alongside an internal estimate that it is trading at a 42.2% discount to fair value and below analyst price targets that imply a 28.2% potential upside.

The preferred metric here is the P/E ratio, which for American Tower currently stands at 23x. For a real estate investment trust that generates earnings from a large portfolio of communications sites and data centers, the P/E ratio helps you compare what investors are paying today for each dollar of current earnings. It is a quick way to see how the market is pricing the company relative to both peers and what a model suggests its earnings stream could be worth.

American Tower is flagged as "good value" across several angles. The stock trades below an internal fair value estimate based on a discounted cash flow approach, with our DCF model placing a future cash flow value at $290.63 per share compared with the current $168.07 share price. That model projects future cash flows and discounts them back to today, which can be especially relevant for a large, established REIT where cash generation and long term contracts are key drivers. Alongside that, the current 23x P/E is described as attractive versus an estimated fair P/E of 34.2x, a level the market could move towards if sentiment and expectations realign with those inputs.

On top of the DCF picture, the same 23x P/E is also highlighted as good value relative to both the North American Specialized REITs industry average of 28.7x and a peer group average of 44.2x. That is a wide gap to the peer average in particular, which suggests investors are paying substantially less per dollar of American Tower earnings than for similar companies exposed to comparable end markets.

Result: Price-to-earnings of 23x (UNDERVALUED)

However, risks remain if American Tower’s multi region operations face regulatory changes or if its longer term returns continue to trail. This could keep the valuation gap in place.

Another view on American Tower’s value

American Tower screens as inexpensive on the 23x P/E ratio compared with both its own estimated fair P/E of 34.2x and the Specialized REITs industry average of 28.7x. It also sits well below a 44.2x peer average. That gap points to a possible opportunity, but also raises the question of why the market is discounting these earnings so heavily.

Simply Wall St performs a discounted cash flow (DCF) on every stock in the world every day (check out American Tower for example). We show the entire calculation in full. You can track the result in your watchlist or portfolio and be alerted when this changes, or use our stock screener to discover 51 high quality undervalued stocks. If you save a screener we even alert you when new companies match - so you never miss a potential opportunity.

Next Steps

With sentiment on American Tower split between attractive valuation signals and recent share price weakness, it helps to look at the full picture for yourself and move quickly if you want to. To see how the balance of concerns and potential upsides stacks up in one place, review the 6 key rewards and 1 important warning sign.

Looking for more investment ideas beyond American Tower?

If American Tower has you rethinking where the best opportunities might be, you can use this momentum to scan the market for other stocks that better fit your goals.

• Spot potential bargains early and review the screener containing 17 high quality undiscovered gems that could be flying under the radar while attention stays elsewhere.
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• Build a quality-focused watchlist and use the solid balance sheet and fundamentals stocks screener (50 results) to highlight businesses with stronger finances at the core.

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.