IRON MOUNTAIN INC
Ticker: IRMReal EstateREITsS&P 500The business
Iron Mountain Incorporated (NYSE: IRM) operates as a global leader in information management services, serving more than 240,000 customers across 61 countries. Founded in 1951 in an underground facility near Hudson, New York, the company has evolved from a records storage provider into a diversified enterprise offering comprehensive solutions that span physical and digital information management, data center operations, and asset lifecycle management.
The company generates approximately $6.9 billion in annual revenue through three primary business segments. The Global Records and Information Management Business encompasses records management, data management, global digital solutions including the Insight Digital Experience Platform, secure shredding, media and archive services, and consumer storage offerings. The Global Data Center Business provides enterprise-class facilities and hyperscale-ready capacity, operating 31 data centers across 21 global markets with 488 megawatts of leasable capacity and an additional 852 megawatts under construction or held for development. Corporate and Other includes asset lifecycle management services and fine arts storage, along with corporate functions.
Iron Mountain operates approximately 1,340 locations globally and manages over 98 million square feet of real estate worldwide, with owned properties spanning more than 24 million square feet. The company stores more than 740 million cubic feet of physical volume and maintains a highly diversified customer base with no single customer representing more than approximately three percent of revenue. Approximately 95 percent of the Fortune 1000 trust Iron Mountain with their information management needs.
The company employs approximately 29,400 people globally, with roughly 11,700 in the United States and 17,700 internationally. Iron Mountain operates as a real estate investment trust for federal income tax purposes and is a constituent of the Standard & Poor's 500 Index. The company's website is www.ironmountain.com. The business model emphasizes recurring revenue streams, with contracted storage rental agreements typically ranging from one to five years, complemented by cross-selling opportunities across its integrated solution portfolio serving commercial, legal, financial, healthcare, technology, insurance, life sciences, energy, and government sectors.
- Sector
- Real Estate
- Industry
- REITs
- HQ
- PORTSMOUTH, NH
- FY end
- 12-31
- CIK
- 1020569
- SIC
- 6798
Ownership
Who holds IRON MOUNTAIN INC — across funds, superinvestors and bonds · N-PORT 2026Q2 · 13F 2026-06-30
Top fund holders
| Fund | % of fund | Value |
|---|---|---|
| VANGUARD REAL ESTATE INDEX FUND VNQ · VANGUARD SPECIALIZED FUNDS | 1.98% | $1.38B |
| VANGUARD TOTAL STOCK MARKET INDEX FUND VTI · VANGUARD INDEX FUNDS | 0.05% | $1.13B |
| VANGUARD 500 INDEX FUND VOO · VANGUARD INDEX FUNDS | 0.06% | $974.14M |
| VANGUARD MID-CAP INDEX FUND VO · VANGUARD INDEX FUNDS | 0.35% | $773.57M |
| iShares Core S&P 500 ETF IVV · iShares Trust | 0.06% | $516.94M |
Bonds held by funds
Funds report holding 13 issues of IRON MOUNTAIN INC's debt, $3.09B at fund-held market value — what funds hold, not the company's debt outstanding. Weighted-average coupon 5.52%, maturing 2027–2035.
| Issue | Coupon | Matures | Funds | Fund-held |
|---|---|---|---|---|
| IRM 4.5 02/15/31 144A | 4.500% | 2031-02-15 | 126 | $441.09M |
| Iron Mountain, Inc. | 5.250% | 2030-07-15 | 149 | $423.80M |
| Iron Mountain Inc | 6.250% | 2035-01-15 | 124 | $383.40M |
| IRM 7 02/15/29 144A | 7.000% | 2029-02-15 | 127 | $367.22M |
| IRM 6.25 01/15/33 144A | 6.250% | 2033-01-15 | 181 | $351.31M |
| Iron Mountain, Inc. | 5.250% | 2028-03-15 | 101 | $314.85M |
| Iron Mountain, Inc. | 4.875% | 2029-09-15 | 109 | $313.76M |
| Iron Mountain, Inc. | 4.875% | 2027-09-15 | 108 | $278.79M |
| IRM 5 07/15/28 144A | 5.000% | 2028-07-15 | 75 | $112.37M |
| IRM 5.625 07/15/32 144A | 5.625% | 2032-07-15 | 76 | $103.16M |
The 10 largest by fund-held value, of 13.
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”.
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