Companies: 10,795·Total market cap: $144.5T
Iron Mountain Incorporated

Iron Mountain Incorporated

IRMNYSEReal Estate● Active
$124.66
$-5.59(-4.29%)
Market Cap$37.1B
P/E Ratio—
52W High$134.09
52W Low$77.77
EmployeesOwnershipInsider Trades

Iron Mountain Incorporated (IRM) Number of Employees – History & Annual Headcount

Annual SEC headcount, year-over-year change, and per-employee efficiency — chart and full history below.

SEC EDGAR · FMP · IRM · as of Feb 12, 2026

Latest filing snapshot

11,700
+550+4.93%vs prior year

Iron Mountain Incorporated (IRM) employee data is sourced from the annual SEC 10-K filing. As of 2025, full-time employees only. Global consolidated headcount. View SEC filing ↗

SEC 10-K·Period end: 2025-12-31·Full-time · Global
Total Employees
11,700
Change (1Y)
+550
Growth % (1Y)
+4.93%
Revenue / Employee
$589.9K
Net Income / Employee
$12.4K
Market Cap
$37.1B

IRM Employee Count

1996 – 2025 · Annual · SEC filing

Source: SEC annual filings · Hover bar to view year data · Click to view original filing

Employees History

Filing DateEmployeesChange (1Y)Growth (1Y)SEC filing link
2026-02-1211,700+550+4.93%
2025-02-1411,150-15,850-58.70%
2024-02-2227,000+1,000+3.85%
2023-02-2326,000+1,000+4.00%
2022-02-2425,000+1,000+4.17%
2021-02-2424,000-1,000-4.00%
2020-02-1325,000-1,000-3.85%
2019-02-1426,000+2,000+8.33%
2018-02-1624,000+0+0.00%
2017-02-2324,000+4,000+20.00%

▸ Source: SEC Annual Reports (Form 10-K / 20-F). Employee counts as of fiscal year end. Click the ↗ icon at the end of a row to open the original SEC filing in a new tab.

Related Companies — Employee Count

REIT - Specialty
#SymbolCompanyEmployees
#1
Iron Mountain Incorporated
IRM
Iron Mountain IncorporatedYOU
11,700#2
CoStar Group, Inc.
CSGP
CoStar Group, Inc.
8,441#3
Extra Space Storage Inc.
EXR
Extra Space Storage Inc.
8,012#4
Lamar Advertising Company
LAMR
Lamar Advertising Company
3,500#5
AvalonBay Communities, Inc.
AVB
AvalonBay Communities, Inc.
2,928#6
Equity Residential
EQR
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2,500#7
Crown Castle Inc.
CCI
Crown Castle Inc.
1,500
Source: /stock-peers + /profile.fullTimeEmployees · Click row → /employees · Sorted by headcount · IRM peer comparison

About IRM employees

IRM Employees · Headcount

Iron Mountain Incorporated (IRM) employee data is sourced from the annual SEC 10-K filing. As of 2025, Iron Mountain Incorporated had 11,700 full-time employees globally. Full-time employees only. Global consolidated headcount.

Iron Mountain Incorporated employs 11,700 full-time employees as of the latest filing within the REIT - Specialty industry. Revenue per employee stands at $589,892, reflecting the company's operational efficiency.

Iron Mountain Incorporated's workforce increased by 550 (4.93%) in 2025 compared to the prior fiscal year. The historical trend reflects the company's expansion and contraction cycles.

Iron Mountain Incorporated's revenue per employee of $589,892 positions it among the notable performers in the REIT - Specialty sector for operational efficiency.

RevenueFinancial statementsNet incomeSEC filingsPrice historyForecast & ratingsOwnershipEarnings

Frequently Asked Questions

IRM Employees · 5 questions

As of the latest SEC 10-K filing (2025), Iron Mountain Incorporated had 11,700 full-time employees globally. This figure is sourced from the company's mandatory annual disclosure to the SEC.

Iron Mountain Incorporated employee counthow many employees does Iron Mountain Incorporated haveIRM total employees 2025

▸ Data source: FMP /historical-employee-count · SEC EDGAR annual filings · As reported · Global consolidated headcount · As of 2026-02-12