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Companies / Real Estate / Iron Mountain
IRM

Iron Mountain

Real EstateREITsS&P 500
Ticker IRMPORTSMOUTH, NHFiscal year ends DecemberBook value per share $-4.28Diluted shares 299.3M

Iron Mountain Incorporated (NYSE: IRM) provides information management, digital transformation, data center, information security and asset lifecycle management services to businesses and government organizations across a range of industries. Its offerings include physical records and backup-media storage, records… From the company’s description.

In fiscal 2025, Iron Mountain reported revenue of $6.90B, up 12.2% from fiscal 2024, and net income of $152.25M. Its operating margin was 16.9%, and operations generated $1.34B in cash. Over the twelve months to Jun 30, 2026, revenue was $7.56B.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-06-30
Sales & profitability
$6.90BFY2025
+12.2% year over year
Last 12 mo $7.56B
16.86%FY2025
+0.4 percentage points
Last 12 mo 18.76%
$152.25MFY2025
−17.1% year over year
Last 12 mo $434.46M
-34.71%FY2025
+33.2 percentage points
Last 12 mo -32.68%
Cash & financing
$1.34BFY2025
+12.0% year over year
Last 12 mo $1.66B
$-931.63MFY2025
−56.6% year over year
Last 12 mo $-490.92M
-16.75FY2025
Was -27.27× a year earlier
Last 12 mo -13.54
297.8MFY2025
+0.5% year over year
Last 12 mo 299.3M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What Iron Mountain does

In the company’s own words

Iron Mountain Incorporated (NYSE: IRM) provides information management, digital transformation, data center, information security and asset lifecycle management services to businesses and government organizations across a range of industries. Its offerings include physical records and backup-media storage, records retrieval and secure shredding, document digitization and digital storage, media archiving, consumer storage, enterprise and hyperscale data centers, IT equipment disposition and recycling, and fine-art handling and storage. Iron Mountain reports Global Records and Information Management, which includes records, data management, digital solutions, shredding, media archives and consumer storage; Global Data Center; and Corporate and Other, which includes asset lifecycle management, Fine Arts and corporate functions. It serves more than 240,000 customers in 61 countries, and generated approximately $6.9 billion in revenue in 2025. Founded in 1951 as a business-records storage company, it operates about 1,340 locations globally. Its website is www.ironmountain.com.

Company details
Sector
Real Estate
Industry (SIC)
REITs
Headquarters
PORTSMOUTH, NH
Fiscal year end
December
CIK
1020569
SIC
6798

Financial performance, year by year

Fiscal 2013–2025 · USD
$-756.25M$1.51B$3.78B$6.05B$8.32B2013201420152016201720182019202020212022202320242025Last 12 moLast 12 monthsLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns Iron Mountain — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

694
funds hold it
0 of 35
superinvestors hold it
$14.39B
held by funds, at market
38.3%
of shares held by funds
13
bond issues held by funds

Largest fund holders · Iron Mountain’s weight in each

VANGUARD REAL ESTATE INDEX FUND
VNQ · VANGUARD SPECIALIZED FUNDS
—of fund net assets
VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.05%of fund net assets
VANGUARD 500 INDEX FUND
VOO · VANGUARD INDEX FUNDS
0.06%of fund net assets
VANGUARD MID-CAP INDEX FUND
VO · VANGUARD INDEX FUNDS
0.35%of fund net assets
iShares Core S&P 500 ETF
IVV · iShares Trust
0.06%of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Iron Mountain’s bonds, as funds hold them

Funds report holding 13 issues of Iron Mountain’s debt, $3.09B at market value — what funds hold, not the company’s total debt. Weighted-average coupon 5.52%, maturing 2027 to 2035.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

Connected research

Put this business in context.

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  • “How do Iron Mountain and its peers compare on margins and cash generation over ten years?”
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  • “What changed in Iron Mountain's last four quarterly filings that the numbers alone won't show?”
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