Company data
Iron Mountain Incorporated employees and revenue per employee
IRM · REIT - Specialty · $33.7B market cap
Iron Mountain Incorporated had 29,400 employees at the end of fiscal Dec 2025, up 1.9% from a year earlier. Revenue for the year was $6.90B, up 12.2% from a year earlier, or $235K per employee. Revenue and headcount both grew, and revenue grew faster.
Employees
29,400
+1.9% YoY
Revenue
$6.90B
+12.2% YoY
Revenue / employee
$235K
Peer median $896K
Rank in industry
10 of 10
REIT - Specialty
Headcount against revenue
Both lines start at 100 in the first year we hold, so you can see which one grew faster.
Hover a year for the numbers.
| Year ending | Employees | Revenue | Per employee | Staff YoY | Revenue YoY |
|---|---|---|---|---|---|
| Dec 2025 | 29,400 | $6.90B | $235K | +1.9% | +12.2% |
| Dec 2024 | 28,850 | $6.15B | $213K | +6.9% | +12.2% |
| Dec 2023 | 27,000 | $5.48B | $203K | +3.8% | +7.4% |
| Dec 2022 | 26,000 | $5.10B | $196K | +4.0% | +13.6% |
| Dec 2021 | 25,000 | $4.49B | $180K | +4.2% | +8.3% |
| Dec 2020 | 24,000 | $4.15B | $173K | -4.0% | -2.7% |
| Dec 2019 | 25,000 | $4.26B | $171K | -3.8% | +0.9% |
| Dec 2018 | 26,000 | $4.23B | $163K | +8.3% | +9.9% |
| Dec 2017 | 24,000 | $3.85B | $160K | +0.0% | +9.5% |
| Dec 2016 | 24,000 | $3.51B | $146K | — | — |
Open roles: we have not matched a verified job board for this company yet.
Iron Mountain Incorporated against similar companies
The closest industry peers by revenue, from REIT - Specialty.
| Company | Employees | Revenue | Revenue / employee | Shape |
|---|---|---|---|---|
| AMT American Tower Corporation | 4,866 | $10.6B | $2.19M | Efficient growth |
| SBAC SBA Communications Corporation | 1,844 | $2.82B | $1.53M | Hiring ahead |
| DLR Digital Realty Trust, Inc. | 4,282 | $6.11B | $1.43M | Efficient growth |
| CCI Crown Castle Inc. | 4,000 | $4.26B | $1.07M | Hiring into decline |
| WY Weyerhaeuser Company | 9,517 | $6.91B | $726K | Hiring into decline |
| EQIX Equinix, Inc. | 13,716 | $9.26B | $675K | Efficient growth |
| LAMR Lamar Advertising Company | 3,500 | $2.27B | $647K | Leaner |
| UNIT Uniti Group Inc. | 8,632 | $2.23B | $259K | — |
| IRM Iron Mountain Incorporated | 29,400 | $6.90B | $235K | Efficient growth |
Questions about Iron Mountain Incorporated
- How many employees does Iron Mountain Incorporated have?
- Iron Mountain Incorporated reported 29,400 employees for the fiscal year ending Dec 2025, in the annual report it filed on February 12, 2026. That is up 1.9% from a year earlier.
- What is Iron Mountain Incorporated's revenue per employee?
- Iron Mountain Incorporated brought in $6.90B of revenue in fiscal Dec 2025, which is $235K per employee. That ranks 10 of 10 companies we track in REIT - Specialty, where the median is $896K.
- Where do these numbers come from?
- Employee counts and revenue are taken from each company's own annual report (Form 10-K). Open roles are counted from the company's public job board where we have matched one. Companies report headcount once a year, sometimes rounded, so small changes can be noise.
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Source: employee counts and revenue as stated in Iron Mountain Incorporated's annual reports (Form 10-K), latest filed February 12, 2026. This is data, not a recommendation to buy or sell IRM.