Market Cap for Iron Mountain (IRM)
According to Iron Mountain's latest reported financial statements, the company's latest reported market cap is $24.75B USD. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
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Latest period
$24.75B
YoY change
+38.1%
5Y CAGR
+17.5%
Peak year (2026)
$34.11B
Latest annual
$34.11B
Market Cap history chart for Iron Mountain (IRM) from 1996 to 2026
Market Cap history table for Iron Mountain (IRM) from 1996 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $34.11B | +38.1% | ||
| 2025 | $24.70B | -20.7% | ||
| 2024 | $31.14B | +51.4% | ||
| 2023 | $20.57B | +41.1% | ||
| 2022 | $14.58B | -4.3% | ||
| 2021 | $15.23B | +78.9% | ||
| 2020 | $8.51B | -7.2% | ||
| 2019 | $9.17B | -1.3% | ||
| 2018 | $9.29B | -7.7% | ||
| 2017 | $10.07B | +25.4% | ||
| 2016 | $8.03B | +40.2% | ||
| 2015 | $5.73B | -24.7% | ||
| 2014 | $7.61B | +30.3% | ||
| 2013 | $5.84B | +7.6% | ||
| 2012 | $5.43B | -10.0% | ||
| 2011 | $6.03B | +19.5% | ||
| 2010 | $5.05B | +8.7% | ||
| 2009 | $4.65B | -7.5% | ||
| 2008 | $5.03B | -32.8% | ||
| 2007 | $7.48B | +35.4% | ||
| 2006 | $5.52B | -0.9% | ||
| 2005 | $5.58B | +39.4% | ||
| 2004 | $4.00B | +16.7% | ||
| 2003 | $3.43B | +20.7% | ||
| 2002 | $2.84B | +16.3% | ||
| 2001 | $2.44B | +23.9% | ||
| 2000 | $1.97B | +50.4% | ||
| 1999 | $1.31B | +87.1% | ||
| 1998 | $700.62M | +226.4% | ||
| 1997 | $214.64M | -32.7% | ||
| 1996 | $318.82M | — |
Market Cap values are taken from Iron Mountain's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
As of the 2026 fiscal year, Iron Mountain (IRM) reported market cap of $34.11B – surged 38.1% year-over-year.
Iron Mountain market cap has recorded the values shown across consecutive periods, with a +17.5% compound annual growth rate over 2021–2026 (5 years).
2026 marks the peak market cap at $34.11B, with the historical low of $214.64M recorded in 1997.
Iron Mountain (IRM) sits 9th of 8 Real Estate peers we track on this metric, against a peer median of $75.03B.
Iron Mountain Market Cap by Year
Iron Mountain Market Cap 2026: $34.11B
Iron Mountain market cap in 2026 was $34.11B, surged 38.1% from 2025. This figure represents the highest annual value in the available history.
Iron Mountain Market Cap 2025: $24.70B
Iron Mountain market cap in 2025 was $24.70B, declined 20.7% below 2024.
Iron Mountain Market Cap 2024: $31.14B
Iron Mountain market cap in 2024 was $31.14B, surged 51.4% from 2023.
Iron Mountain Market Cap 2023: $20.57B
Iron Mountain market cap in 2023 was $20.57B, surged 41.1% from 2022.
Iron Mountain Market Cap 2022: $14.58B
Iron Mountain market cap in 2022 was $14.58B.
See more financial history for Iron Mountain (IRM).
Sector peers — Market Cap
Companies in the same sector as Iron Mountain, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| Welltower Inc. (WELL) | $150.38B | Real Estate |
| Prologis, Inc. (PLD) | $131.94B | Real Estate |
| Equinix, Inc. (EQIX) | $106.16B | Real Estate |
| American Tower Corporation (AMT) | $83.20B | Real Estate |
| Digital Realty Trust, Inc. (DLR) | $66.86B | Real Estate |
| Simon Property Group, Inc. (SPG) | $65.86B | Real Estate |
| Realty Income Corporation (O) | $59.26B | Real Estate |
| Public Storage (PSA) | $52.16B | Real Estate |
Frequently asked questions
What is Iron Mountain's market cap?
- Latest reported market cap for Iron Mountain (IRM) is $24.75B (period ending December 31, 2025).
How has Iron Mountain market cap changed year-over-year?
- Iron Mountain (IRM) market cap changed +38.1% year-over-year on the latest annual filing.
What is the long-term growth rate of Iron Mountain market cap?
- Iron Mountain (IRM) market cap compound annual growth rate is +17.5% over the most recent 5 years available.
When did Iron Mountain market cap hit its highest annual value?
- Iron Mountain market cap reached its highest annual value of $34.11B in 2026.
What was Iron Mountain market cap in 2025?
- Iron Mountain (IRM) market cap in 2025 was $24.70B.
What was Iron Mountain market cap in 2026?
- Iron Mountain (IRM) market cap in 2026 was $34.11B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
Explore more
IRM Overview
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