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Shares Outstanding (EOP) are shares that have been authorized, issued, and purchased by investors and are held by them.
3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three years ago to the current year. A positive ratio may indicate share buybacks over the period, while a zero or negative ratio may reflect no repurchases or potential share issuance. American Tower's current 3-Year Share Buyback Ratio was -0.10%.
The historical rank and industry rank for American Tower's 3-Year Share Buyback Ratio or its related term are showing as below:
AMT'
s 3-Year Share Buyback Ratio Range Over the Past 10 Years
Min: -54.5 Med: -1.45 Max: 1.3
Current: -0.1
During the past 13 years, American Tower's highest 3-Year Share Buyback Ratio was 1.30%. The lowest was -54.50%. And the median was -1.45%.
AMT's 3-Year Share Buyback Ratio is ranked better than 81.17% of 600
companies
in the REITs industry
Industry Median: -2.9
vs AMT: -0.10
American Tower (NYSE:AMT) 3-Year Share Buyback Ratio Explanation
A negative number means the company might be issuing new shares. A positive number indicates that the company is buying back shares.
Be Aware
Investors usually like share buybacks. But as pointed by Warren Buffett, only if a company buys back shares at the prices below the stock's intrinsic value, it rewards remaining shareholders. If a company buys its overvalued stocks back, it destroys shareholder value.
American Tower 3-Year Share Buyback Ratio Related Terms
AMT vs DLR, EQIX, IRM: 3-Year Share Buyback Ratio Comparison
For the REIT - Specialty subindustry, American Tower's 3-Year Share Buyback Ratio, along with its competitors' market caps and 3-Year Share Buyback Ratio data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
American Tower 3-Year Share Buyback Ratio vs REITs Industry
For the REITs industry and Real Estate sector, American Tower's 3-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where American Tower's 3-Year Share Buyback Ratio falls into.
American Tower 3-Year Share Buyback Ratio Calculation
This is the annualized percentage change in shares outstanding from three years ago to the current year. The annualized percentage change is calculated with expontential compound based on the latest four years of annual data on Shares Outstanding (EOP).
Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the average dividends per share growth rate.
What does a 3-Year Share Buyback Ratio of -0.10 mean?
American Tower (AMT) has a 3-Year Share Buyback Ratio of -0.10 as of Mar. 2026. The 3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three years ago to the current year. View historical data for American Tower and its competitors. According to the industry distribution chart, American Tower ranks #113 out of 600 companies in the REITs industry, placing it in the top 18.8%.
Is American Tower's 3-Year Share Buyback Ratio too high?
American Tower's current 3-Year Share Buyback Ratio is -0.10. Based on the distribution chart, American Tower ranks #113 out of 600 companies in the REITs industry, which is in the top quartile — a strong position relative to peers. Overall, American Tower has a GF Score™ of 77/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does American Tower's 3-Year Share Buyback Ratio compare to DLR and EQIX?
According to the REITs industry distribution chart, American Tower ranks #113 out of 600 companies for 3-Year Share Buyback Ratio. This places American Tower in the top 19% of its industry — outperforming the majority of peers. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 3-Year Share Buyback Ratio for a REITs company?
A good 3-Year Share Buyback Ratio depends on the REITs industry context. However, 3-Year Share Buyback Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 3-Year Share Buyback Ratio mean?
A high 3-Year Share Buyback Ratio can signal that a stock is expensive relative to its fundamentals. The 3-Year Share Buyback Ratio measures the average annual proportion of a company's outstanding shares repurchased over the past three years. It is calculated as the annualized percentage change in shares outstanding from three years ago to the current year. View historical data for American Tower and its competitors. American Tower's current 3-Year Share Buyback Ratio is -0.10. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is American Tower stock overvalued right now?
Based on GuruFocus' analysis, American Tower (AMT) is currently considered Modestly Undervalued. The stock's GF Value™ is $207.61, compared to a current price of $179.26 — trading 13.7% below its estimated fair value. The current 3-Year Share Buyback Ratio is -0.10. American Tower's overall GF Score™ is 77/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year Share Buyback Ratio calculated?
3-Year Share Buyback Ratio is calculated from a company's financial statements. For American Tower (AMT), the current 3-Year Share Buyback Ratio is -0.10 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is American Tower (AMT) Overvalued in 2026?
Based on GuruFocus' analysis, American Tower stock appears to be undervalued.
The current stock price of $179.26 is trading 13.7% below its estimated GF Value™ of $207.61.
GuruFocus considers American Tower to be Modestly Undervalued.
Key valuation signals for AMT:
3-Year Share Buyback Ratio: -0.10
GF Value™: $207.61 vs. price of $179.26 (13.7% below fair value)
No single metric tells the full story. See the AMT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
American Tower owns and operates about 150,000 wireless towers throughout the US, Asia, Latin America, Europe, and Africa. It also owns and/or operates 30 data centers in 11 US markets through its CoreSite segment. The company's customer base in the tower business is very concentrated, with most revenue in each market generated by the top three or four mobile carriers. The company operates 42,000 towers in the US, which accounted for about half of total revenue in 2025. Outside the US, American Tower operates about 47,000 towers in Latin America (dominated by Brazil), 33,000 towers in Europe, and 28,000 towers in Africa. American Tower operates as a REIT.
77GF Score
Get the complete analysis for AMT
3-Year Share Buyback Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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