Iron Mountain Inc
IRM- Exchange
- NYSE
- Industry
- Real Estate Investment Trusts
- SEC CIK
- 0001020569
In the last 90 days, Iron Mountain Inc insiders filed 0 open-market purchases and 6 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.
13F holders, Q2 2025
Institutional positions in Iron Mountain Inc as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 1,045
- +59 vs. Q1 2025
- Shares held
- 248.8M
- +4.03M (+1.6%) vs. Q1 2025
- Total value
- $25.5B
- +$4.48B (+21.3%) vs. Q1 2025
- New holders
- 121
- 391 more added
- Sold out
- 62
- 356 more reduced
9 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IRM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1,173 | $32.4B |
| Q1 2026 | 1,090 | $25.9B |
| Q4 2025 | 1,011 | $21.4B |
| Q3 2025 | 1,017 | $25.5B |
| Q2 2025 | 1,045 | $25.5B |
| Q1 2025 | 995 | $21.1B |
| Q4 2024 | 1,067 | $24.9B |
| Q3 2024 | 1,056 | $28.8B |
| Q2 2024 | 967 | $22.2B |
| Q1 2024 | 938 | $19.0B |
| Q4 2023 | 891 | $16.4B |
| Q3 2023 | 831 | $13.7B |
| Q2 2023 | 817 | $12.9B |
| Q1 2023 | 790 | $12.0B |
| Q4 2022 | 782 | $11.4B |
| Q3 2022 | 743 | $10.0B |
| Q2 2022 | 767 | $10.9B |
| Q1 2022 | 777 | $12.4B |
| Q4 2021 | 754 | $12.0B |
| Q3 2021 | 711 | $9.94B |
| Q2 2021 | 687 | $9.70B |
| Q1 2021 | 630 | $8.44B |
Institutions, Q2 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Sanctuary Advisors, LLC | 130,901 | $13.4M | 0.08% | +4,487+3.5% | Added |
| Edgestream Partners, L.P. | 131,482 | $13.5M | 0.38% | +53,883+69.4% | Added |
| Intech Investment Management LLC | 135,397 | $13.9M | 0.13% | −313,364−69.8% | Reduced |
| CIBC World Markets Inc. | 135,591 | $13.9M | 0.03% | +2,480+1.9% | Added |
| Treasurer of the State of North Carolina | 137,047 | $14.1M | 0.05% | +3,803+2.9% | Added |
| QRG Capital Management, Inc. | 138,972 | $14.3M | 0.12% | +3,514+2.6% | Added |
| Citadel Advisors LLC | 139,791 | $14.3M | 0.01% | −1,112,001−88.8% | Reduced |
| APG Asset Management N.V. | 164,400 | $14.4M | 0.04% | +6,200+3.9% | Added |
| Trust Co of Virginia | 140,427 | $14.4M | 1.26% | −1,842−1.3% | Reduced |
| Royal London Asset Management Ltd | 143,234 | $14.7M | 0.03% | −5,803−3.9% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 143,456 | $14.7M | 0.04% | +1,200+0.8% | Added |
| Danske Bank A/S | 145,262 | $14.9M | 0.04% | +590+0.4% | Added |
| Brookstone Capital Management | 148,060 | $15.2M | 0.20% | −10,161−6.4% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 148,120 | $15.3M | 0.67% | +89,510+152.7% | Added |
| Franklin Resources Inc | 149,307 | $15.3M | 0.00% | +26,468+21.5% | Added |
| Dana Investment Advisors, Inc. | 149,318 | $15.3M | 0.51% | −9,729−6.1% | Reduced |
| Jane Street Group, LLC | 149,864 | $15.4M | 0.02% | +100,090+201.1% | Added |
| Storebrand Asset Management AS | 151,665 | $15.6M | 0.05% | −187,241−55.2% | Reduced |
| Chevy Chase Trust Holdings, Inc. | 155,840 | $16.0M | 0.05% | +1,787+1.2% | Added |
| Capital Fund Management S.A. | 156,778 | $16.1M | 0.18% | +69,914+80.5% | Added |
| Handelsbanken Fonder AB | 160,273 | $16.4M | 0.06% | −10,616−6.2% | Reduced |
| Federated Hermes, Inc. | 162,932 | $16.7M | 0.03% | +152,981+1,537.3% | Added |
| Resona Asset Management Co.,Ltd. | 167,192 | $17.1M | 0.08% | −11,262−6.3% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 167,412 | $17.2M | 0.09% | +5,518+3.4% | Added |
| Cetera Investment Advisers | 169,452 | $17.4M | 0.03% | +709+0.4% | Added |
| Allworth Financial LP | 172,403 | $17.7M | 0.08% | +107,025+163.7% | Added |
| State of Alaska, Department of Revenue | 176,708 | $18.1M | 0.19% | +760.0% | Added |
| Toronto Dominion Bank | 178,713 | $18.3M | 0.04% | +34,900+24.3% | Added |
| Natixis Advisors, L.P. | 179,863 | $18.4M | 0.03% | +12,035+7.2% | Added |
| TD Asset Management Inc | 179,988 | $18.5M | 0.02% | −14,036−7.2% | Reduced |
| State of Wisconsin Investment Board | 180,666 | $18.5M | 0.05% | −7,121−3.8% | Reduced |
| United Bank | 181,009 | $18.6M | 2.22% | −7,166−3.8% | Reduced |
| United Capital Financial Advisers, LLC | 182,741 | $18.7M | 0.15% | −965−0.5% | Reduced |
| Intrinsic Edge Capital Management LLC | 184,841 | $19.0M | 2.86% | +184,841 | New |
| Manufacturers Life Insurance Company, The | 186,034 | $19.1M | 0.02% | −9,103−4.7% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 198,833 | $20.4M | 0.05% | +4,038+2.1% | Added |
| Commonwealth Equity Services, LLC | 203,788 | $20.9M | 0.03% | −5,564−2.7% | Reduced |
| Envestnet Asset Management Inc | 204,027 | $20.9M | 0.01% | −9,872−4.6% | Reduced |
| Moran Wealth Management, LLC | 204,196 | $20.9M | 0.65% | −1,794−0.9% | Reduced |
| Citigroup Inc | 204,415 | $21.0M | 0.01% | −26,214−11.4% | Reduced |
| New York State Common Retirement Fund | 208,274 | $21.4M | 0.03% | +2,200+1.1% | Added |
| Ensign Peak Advisors, Inc | 208,895 | $21.4M | 0.04% | −18,121−8.0% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 209,696 | $21.5M | 0.47% | +188,449+886.9% | Added |
| Qube Research & Technologies Ltd | 209,970 | $21.5M | 0.03% | −688,012−76.6% | Reduced |
| Waterfront Capital Partners, LLC | 210,473 | $21.6M | 5.36% | −114,647−35.3% | Reduced |
| Stifel Financial Corp | 215,236 | $22.1M | 0.02% | +10,064+4.9% | Added |
| CI Private Wealth, LLC | 220,275 | $22.6M | 0.03% | −3,497−1.6% | Reduced |
| Pacer Advisors, Inc. | 220,283 | $22.6M | 0.06% | −24,203−9.9% | Reduced |
| STRS Ohio | 224,612 | $23.0M | 0.09% | +33,812+17.7% | Added |
| National Bank of Canada | 227,389 | $23.3M | 0.03% | −12,287−5.1% | Reduced |
| New York State Teachers Retirement System | 227,925 | $23.4M | 0.05% | +186+0.1% | Added |
| Aviva PLC | 228,239 | $23.4M | 0.05% | −125,947−35.6% | Reduced |
| Retirement Systems of Alabama | 231,245 | $23.7M | 0.08% | −757−0.3% | Reduced |
| Victory Capital Management Inc | 231,954 | $23.8M | 0.02% | +146,108+170.2% | Added |
| Andra AP-fonden | 245,900 | $25.2M | 0.35% | −28,900−10.5% | Reduced |
| Regions Financial Corp | 248,286 | $25.5M | 0.18% | +7,010+2.9% | Added |
| Worldquant Millennium Advisors LLC | 268,157 | $27.5M | 0.14% | +7,176+2.7% | Added |
| Korea Investment CORP | 275,470 | $28.3M | 0.06% | −59,600−17.8% | Reduced |
| Macquarie Group Ltd | 288,984 | $29.6M | 0.04% | +5,728+2.0% | Added |
| State Board of Administration of Florida Retirement System | 295,986 | $30.4M | 0.05% | +6,180+2.1% | Added |
| Blair William & Co | 314,130 | $32.2M | 0.09% | −16,408−5.0% | Reduced |
| Swedbank AB | 315,060 | $32.3M | 0.04% | +315,060 | New |
| Adell Harriman & Carpenter Inc | 324,300 | $33.3M | 2.21% | +2,466+0.8% | Added |
| Marble Harbor Investment Counsel, LLC | 328,773 | $33.7M | 3.67% | −4,815−1.4% | Reduced |
| Standard Life Aberdeen plc | 339,663 | $34.8M | 0.06% | +31,017+10.0% | Added |
| Neuberger Berman Group LLC | 364,626 | $37.4M | 0.03% | +325,110+822.7% | Added |
| Bank of Montreal | 366,434 | $37.6M | 0.02% | −52,102−12.4% | Reduced |
| Gillson Capital LP | 369,137 | $37.9M | 2.89% | +369,137 | New |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 377,807 | $38.8M | 0.04% | +258,003+215.4% | Added |
| Voloridge Investment Management, LLC | 382,076 | $39.2M | 0.14% | −358,515−48.4% | Reduced |
| Balyasny Asset Management LLC | 388,197 | $39.8M | 0.09% | −165,351−29.9% | Reduced |
| Raymond James Financial Inc | 392,942 | $40.3M | 0.01% | +5,662+1.5% | Added |
| Adelante Capital Management LLC | 403,205 | $41.4M | 3.19% | +12,859+3.3% | Added |
| BNP Paribas Arbitrage, SA | 426,625 | $43.8M | 0.03% | −151,549−26.2% | Reduced |
| Rockefeller Capital Management L.P. | 378,889 | $43.9M | 0.10% | −48,676−11.4% | Reduced |
| Great West Life Assurance Co | 437,654 | $44.9M | 0.07% | −5,815−1.3% | Reduced |
| California State Teachers Retirement System | 452,201 | $46.4M | 0.05% | +21,277+4.9% | Added |
| UBS Asset Management Americas Inc | 453,029 | $46.5M | 0.01% | +30,606+7.2% | Added |
| Schonfeld Strategic Advisors LLC | 463,153 | $47.5M | 0.36% | +287,249+163.3% | Added |
| Heitman Real Estate Securities LLC | 463,518 | $47.5M | 3.37% | −76,519−14.2% | Reduced |
| National Pension Service | 476,161 | $48.8M | 0.04% | +3,240+0.7% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 478,180 | $49.0M | 0.09% | +110,583+30.1% | Added |
| Border to Coast Pensions Partnership Ltd | 480,000 | $49.2M | 0.90% | 00.0% | Unchanged |
| California Public Employees Retirement System | 493,885 | $50.7M | 0.03% | +14,684+3.1% | Added |
| Zurich Insurance Group Ltd | 513,791 | $52.7M | 0.41% | +513,791 | New |
| Nomura Asset Management Co Ltd | 517,718 | $53.1M | 0.15% | +19,609+3.9% | Added |
| Barclays PLC | 543,696 | $55.8M | 0.02% | −100,350−15.6% | Reduced |
| Asset Management One Co.,Ltd. | 555,950 | $57.0M | 0.18% | +936+0.2% | Added |
| Adage Capital Partners GP, L.L.C. | 560,252 | $57.5M | 0.10% | +242,200+76.2% | Added |
| Alliancebernstein L.P. | 561,286 | $57.6M | 0.02% | −38,428−6.4% | Reduced |
| APG Asset Management US Inc. | 582,174 | $58.2M | 0.44% | 00.0% | Unchanged |
| Millennium Management LLC | 575,969 | $59.1M | 0.05% | −119,925−17.2% | Reduced |
| D. E. Shaw & Co., Inc. | 583,977 | $59.9M | 0.06% | −233,469−28.6% | Reduced |
| Aew Capital Management L P | 619,677 | $63.6M | 3.35% | −49,590−7.4% | Reduced |
| Rhumbline Advisers | 619,894 | $63.6M | 0.05% | −44,107−6.6% | Reduced |
| Wells Fargo & Company | 625,477 | $64.2M | 0.01% | +17,412+2.9% | Added |
| Price T Rowe Associates Inc | 627,040 | $64.3M | 0.01% | −197,063−23.9% | Reduced |
| Welch & Forbes LLC | 668,938 | $68.6M | 0.86% | −5,104−0.8% | Reduced |
| LPL Financial LLC | 673,596 | $69.1M | 0.02% | +42,787+6.8% | Added |
| Epoch Investment Partners, Inc. | 683,612 | $70.1M | 0.36% | −30,413−4.3% | Reduced |