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 8 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 |
|---|---|---|---|---|---|
| Waterfront Capital Partners, LLC | 210,473 | $21.6M | 5.36% | −114,647−35.3% | Reduced |
| Qube Research & Technologies Ltd | 209,970 | $21.5M | 0.03% | −688,012−76.6% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 209,696 | $21.5M | 0.47% | +188,449+886.9% | Added |
| Ensign Peak Advisors, Inc | 208,895 | $21.4M | 0.04% | −18,121−8.0% | Reduced |
| New York State Common Retirement Fund | 208,274 | $21.4M | 0.03% | +2,200+1.1% | Added |
| Citigroup Inc | 204,415 | $21.0M | 0.01% | −26,214−11.4% | Reduced |
| Moran Wealth Management, LLC | 204,196 | $20.9M | 0.65% | −1,794−0.9% | Reduced |
| Envestnet Asset Management Inc | 204,027 | $20.9M | 0.01% | −9,872−4.6% | Reduced |
| Commonwealth Equity Services, LLC | 203,788 | $20.9M | 0.03% | −5,564−2.7% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 198,833 | $20.4M | 0.05% | +4,038+2.1% | Added |
| Manufacturers Life Insurance Company, The | 186,034 | $19.1M | 0.02% | −9,103−4.7% | Reduced |
| Intrinsic Edge Capital Management LLC | 184,841 | $19.0M | 2.86% | +184,841 | New |
| United Capital Financial Advisers, LLC | 182,741 | $18.7M | 0.15% | −965−0.5% | Reduced |
| United Bank | 181,009 | $18.6M | 2.22% | −7,166−3.8% | Reduced |
| State of Wisconsin Investment Board | 180,666 | $18.5M | 0.05% | −7,121−3.8% | Reduced |
| TD Asset Management Inc | 179,988 | $18.5M | 0.02% | −14,036−7.2% | Reduced |
| Natixis Advisors, L.P. | 179,863 | $18.4M | 0.03% | +12,035+7.2% | Added |
| Toronto Dominion Bank | 178,713 | $18.3M | 0.04% | +34,900+24.3% | Added |
| State of Alaska, Department of Revenue | 176,708 | $18.1M | 0.19% | +760.0% | Added |
| Allworth Financial LP | 172,403 | $17.7M | 0.08% | +107,025+163.7% | Added |
| Cetera Investment Advisers | 169,452 | $17.4M | 0.03% | +709+0.4% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 167,412 | $17.2M | 0.09% | +5,518+3.4% | Added |
| Resona Asset Management Co.,Ltd. | 167,192 | $17.1M | 0.08% | −11,262−6.3% | Reduced |
| Federated Hermes, Inc. | 162,932 | $16.7M | 0.03% | +152,981+1,537.3% | Added |
| Handelsbanken Fonder AB | 160,273 | $16.4M | 0.06% | −10,616−6.2% | Reduced |
| Capital Fund Management S.A. | 156,778 | $16.1M | 0.18% | +69,914+80.5% | Added |
| Chevy Chase Trust Holdings, Inc. | 155,840 | $16.0M | 0.05% | +1,787+1.2% | Added |
| Storebrand Asset Management AS | 151,665 | $15.6M | 0.05% | −187,241−55.2% | Reduced |
| Jane Street Group, LLC | 149,864 | $15.4M | 0.02% | +100,090+201.1% | Added |
| Dana Investment Advisors, Inc. | 149,318 | $15.3M | 0.51% | −9,729−6.1% | Reduced |
| Franklin Resources Inc | 149,307 | $15.3M | 0.00% | +26,468+21.5% | Added |
| Nippon Life Global Investors Americas, Inc. | 148,120 | $15.3M | 0.67% | +89,510+152.7% | Added |
| Brookstone Capital Management | 148,060 | $15.2M | 0.20% | −10,161−6.4% | Reduced |
| Danske Bank A/S | 145,262 | $14.9M | 0.04% | +590+0.4% | Added |
| Cambridge Investment Research Advisors, Inc. | 143,456 | $14.7M | 0.04% | +1,200+0.8% | Added |
| Royal London Asset Management Ltd | 143,234 | $14.7M | 0.03% | −5,803−3.9% | Reduced |
| Trust Co of Virginia | 140,427 | $14.4M | 1.26% | −1,842−1.3% | Reduced |
| APG Asset Management N.V. | 164,400 | $14.4M | 0.04% | +6,200+3.9% | Added |
| Citadel Advisors LLC | 139,791 | $14.3M | 0.01% | −1,112,001−88.8% | Reduced |
| QRG Capital Management, Inc. | 138,972 | $14.3M | 0.12% | +3,514+2.6% | Added |
| Treasurer of the State of North Carolina | 137,047 | $14.1M | 0.05% | +3,803+2.9% | Added |
| CIBC World Markets Inc. | 135,591 | $13.9M | 0.03% | +2,480+1.9% | Added |
| Intech Investment Management LLC | 135,397 | $13.9M | 0.13% | −313,364−69.8% | Reduced |
| Edgestream Partners, L.P. | 131,482 | $13.5M | 0.38% | +53,883+69.4% | Added |
| Sanctuary Advisors, LLC | 130,901 | $13.4M | 0.08% | +4,487+3.5% | Added |
| Ar Asset Management Inc | 130,600 | $13.4M | 2.98% | 00.0% | Unchanged |
| Vert Asset Management LLC | 129,482 | $13.3M | 4.84% | −6,564−4.8% | Reduced |
| Tectonic Advisors LLC | 128,376 | $13.2M | 0.77% | +12,379+10.7% | Added |
| Mutual Advisors, LLC | 132,456 | $13.2M | 0.33% | +2,013+1.5% | Added |
| Colony Group, LLC | 127,848 | $13.1M | 0.03% | −21,689−14.5% | Reduced |
| SG Americas Securities, LLC | 125,316 | $12.9M | 0.06% | +65,051+107.9% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 124,233 | $12.7M | 0.03% | −730−0.6% | Reduced |
| Susquehanna International Group, LLP | 123,770 | $12.7M | 0.02% | +55,956+82.5% | Added |
| Virginia Retirement Systems Et Al | 122,300 | $12.5M | 0.09% | +36,900+43.2% | Added |
| Sargent Investment Group, LLC | 136,751 | $12.3M | 1.66% | +14,804+12.1% | Added |
| Advisor Group Holdings, Inc. | 119,147 | $12.2M | 0.02% | −2,005−1.7% | Reduced |
| Pinebridge Investments, L.P. | 117,989 | $12.1M | 0.10% | −24,349−17.1% | Reduced |
| Employees Retirement System of Texas | 117,324 | $12.0M | 0.10% | −55,000−31.9% | Reduced |
| CIBC World Markets Corp | 115,626 | $11.9M | 0.08% | −1,851−1.6% | Reduced |
| Creative Planning | 114,587 | $11.8M | 0.01% | +7,924+7.4% | Added |
| La Banque Postale Asset Management SA | 114,471 | $11.7M | 0.17% | +114,471 | New |
| UniSuper Management Pty Ltd | 112,214 | $11.5M | 0.08% | −1,279−1.1% | Reduced |
| HighTower Advisors, LLC | 110,088 | $11.3M | 0.01% | +964+0.9% | Added |
| Allspring Global Investments Holdings, LLC | 112,148 | $11.2M | 0.02% | +4,508+4.2% | Added |
| Weiss Asset Management LP | 108,426 | $11.1M | 0.18% | +108,426 | New |
| Canada Pension Plan Investment Board | 107,956 | $11.1M | 0.01% | −1,387−1.3% | Reduced |
| Bamco Inc | 107,524 | $11.0M | 0.03% | +107,524 | New |
| Thrivent Financial for Lutherans | 107,292 | $11.0M | 0.02% | −20,250−15.9% | Reduced |
| AQR Capital Management LLC | 106,009 | $10.8M | 0.01% | +40,844+62.7% | Added |
| KLP Kapitalforvaltning AS | 103,016 | $10.6M | 0.05% | +4,100+4.1% | Added |
| IFM Investors Pty Ltd | 103,029 | $10.6M | 0.10% | −11,039−9.7% | Reduced |
| AXA S.A. | 101,843 | $10.4M | 0.03% | +75,393+285.0% | Added |
| State of Tennessee, Treasury Department | 100,097 | $10.3M | 0.04% | −2,336−2.3% | Reduced |
| Private Advisor Group, LLC | 99,050 | $10.2M | 0.05% | −312−0.3% | Reduced |
| Chicago Capital, LLC | 97,636 | $10.0M | 0.25% | −1,578−1.6% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 97,014 | $9.95M | 0.09% | +2,049+2.2% | Added |
| State of New Jersey Common Pension Fund D | 97,012 | $9.95M | 0.04% | +272+0.3% | Added |
| Sora Investors LLC | 95,977 | $9.84M | 0.89% | +95,977 | New |
| Gotham Asset Management, LLC | 94,828 | $9.73M | 0.06% | +29,144+44.4% | Added |
| Public Employees Retirement System of Ohio | 92,597 | $9.50M | 0.03% | +588+0.6% | Added |
| Forsta Ap-Fonden | 91,000 | $9.33M | 0.06% | −1,800−1.9% | Reduced |
| Janney Montgomery Scott LLC | 90,708 | $9.30M | 0.02% | −222−0.2% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 90,253 | $9.26M | 0.05% | −6,222−6.4% | Reduced |
| Sonora Investment Management Group, LLC | 89,500 | $9.18M | 0.68% | +13,207+17.3% | Added |
| Kestra Advisory Services, LLC | 88,917 | $9.12M | 0.04% | +917+1.0% | Added |
| Oversea-Chinese Banking CORP Ltd | 88,735 | $9.10M | 0.26% | +7,114+8.7% | Added |
| Quantinno Capital Management LP | 88,511 | $9.08M | 0.04% | +47,801+117.4% | Added |
| ExodusPoint Capital Management, LP | 88,047 | $9.03M | 0.11% | −62,657−41.6% | Reduced |
| Foresight Capital Management Advisors, Inc. | 86,716 | $8.89M | 5.17% | −1,469−1.7% | Reduced |
| M&T Bank Corp | 86,327 | $8.85M | 0.03% | +1,132+1.3% | Added |
| Arizona State Retirement System | 85,855 | $8.81M | 0.05% | +990+1.2% | Added |
| Nisa Investment Advisors, LLC | 84,801 | $8.78M | 0.04% | −24,802−22.6% | Reduced |
| Avantax Advisory Services, Inc. | 85,172 | $8.74M | 0.05% | +11,276+15.3% | Added |
| HRT Financial LP | 83,708 | $8.59M | 0.04% | +83,708 | New |
| MetLife Investment Management | 83,519 | $8.57M | 0.05% | −8,349−9.1% | Reduced |
| Voya Investment Management LLC | 81,650 | $8.37M | 0.01% | −52,716−39.2% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 81,603 | $8.37M | 0.02% | −183,728−69.2% | Reduced |
| Mercer Global Advisors Inc | 81,270 | $8.34M | 0.02% | −1,323−1.6% | Reduced |
| Nissay Asset Management Corp | 80,816 | $8.29M | 0.05% | +1,867+2.4% | Added |
| State of Michigan Retirement System | 80,246 | $8.23M | 0.04% | +600+0.8% | Added |