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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. Iron Mountain's current 3-Year Share Buyback Ratio was -0.60%.
The historical rank and industry rank for Iron Mountain's 3-Year Share Buyback Ratio or its related term are showing as below:
IRM'
s 3-Year Share Buyback Ratio Range Over the Past 10 Years
Min: -45.2 Med: -0.9 Max: 5.2
Current: -0.6
During the past 13 years, Iron Mountain's highest 3-Year Share Buyback Ratio was 5.20%. The lowest was -45.20%. And the median was -0.90%.
IRM's 3-Year Share Buyback Ratio is ranked better than 69.88% of 591
companies
in the REITs industry
Industry Median: -2.8
vs IRM: -0.60
Iron Mountain (NYSE:IRM) 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.
Iron Mountain 3-Year Share Buyback Ratio Related Terms
IRM vs CCI, SBAC, WY: 3-Year Share Buyback Ratio Comparison
For the REIT - Specialty subindustry, Iron Mountain'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.
Iron Mountain 3-Year Share Buyback Ratio vs REITs Industry
For the REITs industry and Real Estate sector, Iron Mountain's 3-Year Share Buyback Ratio distribution charts can be found below:
* The bar in red indicates where Iron Mountain's 3-Year Share Buyback Ratio falls into.
Iron Mountain 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 -0.60 mean?
Iron Mountain (IRM) has a 3-Year Share Buyback Ratio of -0.60 as of Jun. 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 Iron Mountain and its competitors. According to the industry distribution chart, Iron Mountain ranks #178 out of 591 companies in the REITs industry, placing it in the top 30.1%.
Is Iron Mountain's 3-Year Share Buyback Ratio too high?
Iron Mountain's current 3-Year Share Buyback Ratio is -0.60. Based on the distribution chart, Iron Mountain ranks #178 out of 591 companies in the REITs industry, which is above the industry midpoint. Overall, Iron Mountain has a GF Score™ of 84/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Iron Mountain's 3-Year Share Buyback Ratio compare to CCI and SBAC?
According to the REITs industry distribution chart, Iron Mountain ranks #178 out of 591 companies for 3-Year Share Buyback Ratio. This puts Iron Mountain in the upper half of its industry. 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 Iron Mountain and its competitors. Iron Mountain's current 3-Year Share Buyback Ratio is -0.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Iron Mountain stock overvalued right now?
Based on GuruFocus' analysis, Iron Mountain (IRM) is currently considered Fairly Valued. The stock's GF Value™ is $117.76, compared to a current price of $126.67 — trading 7.6% above its estimated fair value. The current 3-Year Share Buyback Ratio is -0.60. Iron Mountain's overall GF Score™ is 84/100 with 10 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 Iron Mountain (IRM), the current 3-Year Share Buyback Ratio is -0.60 as of Jun. 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 Iron Mountain (IRM) Overvalued in 2026?
Based on GuruFocus' analysis, Iron Mountain stock appears to be overvalued.
The current stock price of $126.67 is trading 7.6% above its estimated GF Value™ of $117.76.
GuruFocus considers Iron Mountain to be Fairly Valued.
Key valuation signals for IRM:
3-Year Share Buyback Ratio: -0.60
GF Value™: $117.76 vs. price of $126.67 (7.6% above fair value)
No single metric tells the full story. See the IRM stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Iron Mountain Inc is an information management services provider organized and operated as a real estate investment trust. The company offers solutions to its clients to address their information management, digital transformation, information security, data center, and asset lifecycle management (ALM) needs. Its customers come from various industries, including commercial, legal, financial, healthcare, technology, etc. The company has two reportable segments: Global Records and Information Management (Global RIM) and Global Data Center. Maximum revenue is generated from the Global RIM segment, which offers data and records management, secure shredding, consumer storage, and other related services. Geographically, the company generates maximum revenue from the United States.
84GF Score
Get the complete analysis for IRM
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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