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 |
|---|---|---|---|---|---|
| Vanguard Group Inc | 47,064,887 | $4.83B | 0.08% | +239,153+0.5% | Added |
| BlackRock, Inc. | 31,278,627 | $3.21B | 0.06% | −3,944,152−11.2% | Reduced |
| State Street Corp | 16,809,643 | $1.74B | 0.07% | +104,524+0.6% | Added |
| Cohen & Steers, Inc. | 13,768,631 | $1.41B | 2.59% | +286,729+2.1% | Added |
| Geode Capital Management, LLC | 8,086,718 | $826.2M | 0.06% | −196,665−2.4% | Reduced |
| FMR LLC | 6,697,419 | $687.0M | 0.04% | +1,410,684+26.7% | Added |
| Dimensional Fund Advisors LP | 4,292,766 | $440.3M | 0.10% | +36,349+0.9% | Added |
| Invesco Ltd. | 4,289,583 | $440.0M | 0.07% | +1,440,629+50.6% | Added |
| Norges Bank | 4,089,466 | $419.5M | 0.05% | +397,992+10.8% | Added |
| Northern Trust Corp | 4,067,808 | $417.2M | 0.06% | −199,516−4.7% | Reduced |
| Charles Schwab Investment Management Inc | 3,625,808 | $371.9M | 0.06% | +138,329+4.0% | Added |
| Morgan Stanley | 3,506,483 | $359.7M | 0.02% | +117,444+3.5% | Added |
| Deutsche Bank AG | 3,429,481 | $351.8M | 0.13% | +284,654+9.1% | Added |
| Legal & General Group Plc | 3,283,276 | $336.8M | 0.08% | +99,278+3.1% | Added |
| Daiwa Securities Group Inc. | 2,954,927 | $303.1M | 1.12% | +202,460+7.4% | Added |
| Principal Financial Group Inc | 2,584,856 | $265.1M | 0.14% | +1,680,672+185.9% | Added |
| Pictet Asset Management Holding SA | 2,475,671 | $253.9M | 0.26% | −9260.0% | Reduced |
| Contour Asset Management LLC | 2,335,348 | $239.5M | 7.83% | +908,098+63.6% | Added |
| Capital World Investors | 2,117,169 | $217.2M | 0.03% | 00.0% | Unchanged |
| Nuveen, LLC | 2,054,789 | $210.8M | 0.06% | −179,411−8.0% | Reduced |
| Royal Bank of Canada | 2,042,795 | $209.5M | 0.04% | +1,544,866+310.3% | Added |
| Centersquare Investment Management LLC | 2,030,916 | $208.3M | 2.16% | +22,479+1.1% | Added |
| JPMorgan Chase & Co | 1,972,998 | $202.4M | 0.01% | −88,562−4.3% | Reduced |
| Prudential Financial Inc | 1,945,769 | $199.6M | 0.26% | +601,290+44.7% | Added |
| Goldman Sachs Group Inc | 1,879,971 | $192.8M | 0.03% | −94,951−4.8% | Reduced |
| Russell Investments Group, Ltd. | 1,823,664 | $187.0M | 0.24% | +52,550+3.0% | Added |
| UBS Group AG | 1,800,227 | $184.6M | 0.04% | +654,941+57.2% | Added |
| Bank of New York Mellon Corp | 1,747,476 | $179.2M | 0.03% | −113,842−6.1% | Reduced |
| Ameriprise Financial Inc | 1,705,824 | $175.9M | 0.04% | +151,140+9.7% | Added |
| PGGM Investments | 1,565,792 | $160.6M | 2.78% | −32,176−2.0% | Reduced |
| Amundi | 1,600,818 | $159.5M | 0.06% | +500,884+45.5% | Added |
| Wellington Management Group LLP | 1,493,923 | $153.2M | 0.03% | +426,559+40.0% | Added |
| Duff & Phelps Investment Management Co | 1,472,579 | $151.0M | 1.78% | +141,418+10.6% | Added |
| Bank of America Corp | 1,249,442 | $128.2M | 0.01% | +133,850+12.0% | Added |
| DekaBank Deutsche Girozentrale | 1,122,500 | $114.8M | 0.20% | −3,512−0.3% | Reduced |
| Cbre Clarion Securities LLC | 1,073,098 | $110.1M | 1.67% | +300,908+39.0% | Added |
| Point72 Asset Management, L.P. | 1,014,379 | $104.0M | 0.25% | −1,060,903−51.1% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 924,414 | $94.8M | 0.06% | −122,702−11.7% | Reduced |
| Swiss National Bank | 889,261 | $91.2M | 0.05% | +61,700+7.5% | Added |
| SEI Investments Co | 885,080 | $90.8M | 0.11% | +55,245+6.7% | Added |
| HSBC Holdings PLC | 784,296 | $80.4M | 0.05% | −35,566−4.3% | Reduced |
| Captrust Financial Advisors | 769,181 | $78.9M | 0.18% | −34,442−4.3% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 766,588 | $78.6M | 0.06% | +49,340+6.9% | Added |
| American Century Companies Inc | 745,266 | $76.4M | 0.04% | +266,150+55.6% | Added |
| CIBC Private Wealth Group, LLC | 733,249 | $75.2M | 0.13% | −3,606−0.5% | Reduced |
| Epoch Investment Partners, Inc. | 683,612 | $70.1M | 0.36% | −30,413−4.3% | Reduced |
| LPL Financial LLC | 673,596 | $69.1M | 0.02% | +42,787+6.8% | Added |
| Welch & Forbes LLC | 668,938 | $68.6M | 0.86% | −5,104−0.8% | Reduced |
| Price T Rowe Associates Inc | 627,040 | $64.3M | 0.01% | −197,063−23.9% | Reduced |
| Wells Fargo & Company | 625,477 | $64.2M | 0.01% | +17,412+2.9% | Added |
| Rhumbline Advisers | 619,894 | $63.6M | 0.05% | −44,107−6.6% | Reduced |
| Aew Capital Management L P | 619,677 | $63.6M | 3.35% | −49,590−7.4% | Reduced |
| D. E. Shaw & Co., Inc. | 583,977 | $59.9M | 0.06% | −233,469−28.6% | Reduced |
| Millennium Management LLC | 575,969 | $59.1M | 0.05% | −119,925−17.2% | Reduced |
| APG Asset Management US Inc. | 582,174 | $58.2M | 0.44% | 00.0% | Unchanged |
| Alliancebernstein L.P. | 561,286 | $57.6M | 0.02% | −38,428−6.4% | Reduced |
| Adage Capital Partners GP, L.L.C. | 560,252 | $57.5M | 0.10% | +242,200+76.2% | Added |
| Asset Management One Co.,Ltd. | 555,950 | $57.0M | 0.18% | +936+0.2% | Added |
| Barclays PLC | 543,696 | $55.8M | 0.02% | −100,350−15.6% | Reduced |
| Nomura Asset Management Co Ltd | 517,718 | $53.1M | 0.15% | +19,609+3.9% | Added |
| Zurich Insurance Group Ltd | 513,791 | $52.7M | 0.41% | +513,791 | New |
| California Public Employees Retirement System | 493,885 | $50.7M | 0.03% | +14,684+3.1% | Added |
| Border to Coast Pensions Partnership Ltd | 480,000 | $49.2M | 0.90% | 00.0% | Unchanged |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 478,180 | $49.0M | 0.09% | +110,583+30.1% | Added |
| National Pension Service | 476,161 | $48.8M | 0.04% | +3,240+0.7% | Added |
| Heitman Real Estate Securities LLC | 463,518 | $47.5M | 3.37% | −76,519−14.2% | Reduced |
| Schonfeld Strategic Advisors LLC | 463,153 | $47.5M | 0.36% | +287,249+163.3% | Added |
| UBS Asset Management Americas Inc | 453,029 | $46.5M | 0.01% | +30,606+7.2% | Added |
| California State Teachers Retirement System | 452,201 | $46.4M | 0.05% | +21,277+4.9% | Added |
| Great West Life Assurance Co | 437,654 | $44.9M | 0.07% | −5,815−1.3% | Reduced |
| Rockefeller Capital Management L.P. | 378,889 | $43.9M | 0.10% | −48,676−11.4% | Reduced |
| BNP Paribas Arbitrage, SA | 426,625 | $43.8M | 0.03% | −151,549−26.2% | Reduced |
| Adelante Capital Management LLC | 403,205 | $41.4M | 3.19% | +12,859+3.3% | Added |
| Raymond James Financial Inc | 392,942 | $40.3M | 0.01% | +5,662+1.5% | Added |
| Balyasny Asset Management LLC | 388,197 | $39.8M | 0.09% | −165,351−29.9% | Reduced |
| Voloridge Investment Management, LLC | 382,076 | $39.2M | 0.14% | −358,515−48.4% | Reduced |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 377,807 | $38.8M | 0.04% | +258,003+215.4% | Added |
| Gillson Capital LP | 369,137 | $37.9M | 2.89% | +369,137 | New |
| Bank of Montreal | 366,434 | $37.6M | 0.02% | −52,102−12.4% | Reduced |
| Neuberger Berman Group LLC | 364,626 | $37.4M | 0.03% | +325,110+822.7% | Added |
| Standard Life Aberdeen plc | 339,663 | $34.8M | 0.06% | +31,017+10.0% | Added |
| Marble Harbor Investment Counsel, LLC | 328,773 | $33.7M | 3.67% | −4,815−1.4% | Reduced |
| Adell Harriman & Carpenter Inc | 324,300 | $33.3M | 2.21% | +2,466+0.8% | Added |
| Swedbank AB | 315,060 | $32.3M | 0.04% | +315,060 | New |
| Blair William & Co | 314,130 | $32.2M | 0.09% | −16,408−5.0% | Reduced |
| State Board of Administration of Florida Retirement System | 295,986 | $30.4M | 0.05% | +6,180+2.1% | Added |
| Macquarie Group Ltd | 288,984 | $29.6M | 0.04% | +5,728+2.0% | Added |
| Korea Investment CORP | 275,470 | $28.3M | 0.06% | −59,600−17.8% | Reduced |
| Worldquant Millennium Advisors LLC | 268,157 | $27.5M | 0.14% | +7,176+2.7% | Added |
| Regions Financial Corp | 248,286 | $25.5M | 0.18% | +7,010+2.9% | Added |
| Andra AP-fonden | 245,900 | $25.2M | 0.35% | −28,900−10.5% | Reduced |
| Victory Capital Management Inc | 231,954 | $23.8M | 0.02% | +146,108+170.2% | Added |
| Retirement Systems of Alabama | 231,245 | $23.7M | 0.08% | −757−0.3% | Reduced |
| Aviva PLC | 228,239 | $23.4M | 0.05% | −125,947−35.6% | Reduced |
| New York State Teachers Retirement System | 227,925 | $23.4M | 0.05% | +186+0.1% | Added |
| National Bank of Canada | 227,389 | $23.3M | 0.03% | −12,287−5.1% | Reduced |
| STRS Ohio | 224,612 | $23.0M | 0.09% | +33,812+17.7% | Added |
| Pacer Advisors, Inc. | 220,283 | $22.6M | 0.06% | −24,203−9.9% | Reduced |
| CI Private Wealth, LLC | 220,275 | $22.6M | 0.03% | −3,497−1.6% | Reduced |
| Stifel Financial Corp | 215,236 | $22.1M | 0.02% | +10,064+4.9% | Added |