IRM
Iron Mountain
PE ratio, current and historical analysis
- Stocks
- Real Estate
- NYSE: IRM
- PE Ratio
As of Jun 23, 2026, the Iron Mountain stock's price-to-earnings ratio is 144.63. This results from the current EPS of $0.92 and stock price of $133.06. The P/E ratio has decreased by 52% from the past four quarters average of 300.4.
IRM PE ratio history
The PE ratio of Iron Mountain has averaged 91.71 over the last ten years. The current PE ratio of 144.63 is 58% above the historical average. In the past ten years, IRM's PE ratio was at its highest in the Jun 2025 quarter at 732.64, when the stock price was $102.57 and the EPS was $0.14. The lowest value was in the Sep 2021 quarter, when it reached 19.75 with a price of $43.45 and an EPS of $2.2.
Iron Mountain PE ratio by year
Maximum annual increase: 327.89% in 2023
Maximum annual decrease: -60.58% in 2014
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 169.29 | -1.75% | $82.95 | $0.49 |
| 2024 | 172.31 | 55.12% | $105.11 | $0.61 |
| 2023 | 111.08 | 327.89% | $69.98 | $0.63 |
| 2022 | 25.96 | -22.6% | $49.85 | $1.92 |
| 2021 | 33.54 | 35.41% | $52.33 | $1.56 |
| 2020 | 24.77 | -27.72% | $29.48 | $1.19 |
| 2019 | 34.27 | 35.35% | $31.87 | $0.93 |
| 2018 | 25.32 | -55.71% | $32.41 | $1.28 |
| 2017 | 57.17 | -27.83% | $37.73 | $0.66 |
| 2016 | 79.22 | 73.04% | $32.48 | $0.41 |
| 2015 | 45.78 | 98.96% | $27.01 | $0.59 |
| 2014 | 23.01 | -60.58% | $38.66 | $1.68 |
| 2013 | 58.37 | 87.99% | $30.35 | $0.52 |
| 2012 | 31.05 | 107.69% | $31.05 | $1 |
| 2011 | 14.95 | N/A | $30.8 | $2.06 |
Iron Mountain PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Mar 2026 | 111.02 | -34.42% | $102.14 | $0.92 |
| Dec 2025 | 169.29 | -10.32% | $82.95 | $0.49 |
| Sep 2025 | 188.78 | -74.23% | $101.94 | $0.54 |
| Jun 2025 | 732.64 | 249.13% | $102.57 | $0.14 |
| Mar 2025 | 209.85 | 21.79% | $86.04 | $0.41 |
| Dec 2024 | 172.31 | -47.8% | $105.11 | $0.61 |
| Sep 2024 | 330.08 | 187.28% | $118.83 | $0.36 |
| Jun 2024 | 114.9 | -5.46% | $89.62 | $0.78 |
| Mar 2024 | 121.53 | 9.41% | $80.21 | $0.66 |
| Dec 2023 | 111.08 | 79.36% | $69.98 | $0.63 |
| Sep 2023 | 61.93 | 41.68% | $59.45 | $0.96 |
| Jun 2023 | 43.71 | 64.39% | $56.82 | $1.3 |
| Mar 2023 | 26.59 | 2.43% | $52.91 | $1.99 |
| Dec 2022 | 25.96 | 0.97% | $49.85 | $1.92 |
| Sep 2022 | 25.71 | -31.88% | $43.97 | $1.71 |
IRM Price vs fair value
IRM average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
IRM's current P/E ratio is above the 5 and 10-year historical averages, but it is lower than the 3-year average.
PE comparison
Iron Mountain's P/E of 144.63 is above the Real Estate sector, the industry and its peers average. Compared to its Real Estate sector average of 24.16, Iron Mountain's P/E is 499% higher.
IRM PE vs peers
Compared to its peer stocks ADP and MCO, IRM's PE ratio stands higher. Iron Mountain is presently trading at a higher PE ratio (144.63) than its peer group average of 25.75.
| Stock name | PE ratio | Market cap |
|---|---|---|
| PBI Pitney Bowes Inc | 16.08 | $2.31B |
| ADP Automatic Data Processing Inc | 20.49 | $88.14B |
| TW Tradeweb Markets Inc | 24.37 | $23.41B |
| EFX Equifax Inc | 26.67 | $18.16B |
| MCO Moodys Corp | 31.71 | $77.56B |
| CTAS Cintas Corp | 35.17 | $67.53B |
| IRM Iron Mountain Inc | 144.63 | $39.59B |
Frequently asked questions
What is Iron Mountain's PE ratio?
As of Jun 23, 2026, IRM stock has a price to earnings ratio of 144.63.
What is the 3-year average PE ratio for Iron Mountain (IRM)?
The 3-year average PE ratio for IRM stock is 197.26.
What is the 5-year average PE ratio for Iron Mountain (IRM)?
The 5-year average PE ratio for IRM stock is 129.62.
What is the highest PE ratio for IRM?
Over the last ten years, the quarterly PE ratio reached a historic high of 732.64 in the Jun 2025 quarter.
How does the current PE ratio for IRM compare to its historical average?
IRM's price to earnings ratio is currently 58% above its 10-year historical average.
Why is Iron Mountain's PE ratio so high?
IRM's PE ratio is high because its earnings per share (EPS) is low relative to its stock price.
How is IRM's PE ratio calculated (Iron Mountain PE ratio formula)?
You can calculate the PE ratio by dividing the most recent stock price by the trailing twelve months EPS. As of today (Jun 23, 2026), Iron Mountain's stock price is $133.06. The earnings per share for the trailing twelve months (TTM) ending Mar 2026 is $0.92. Therefore, Iron Mountain's P/E ratio for today is 144.63. PE RATIO(144.63) = STOCK PRICE($133.06) / TTM EPS($0.92)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.