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, Q1 2024
Institutional positions in Iron Mountain Inc as of Mar 31, 2024. 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
- 938
- +57 vs. Q4 2023
- Shares held
- 237.3M
- +3.71M (+1.6%) vs. Q4 2023
- Total value
- $19.0B
- +$2.65B (+16.2%) vs. Q4 2023
- New holders
- 126
- 310 more added
- Sold out
- 69
- 328 more reduced
10 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2023: 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, Q1 2024
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q4 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 46,377,234 | $3.72B | 0.07% | +102,124+0.2% | Added |
| Cohen & Steers, Inc. | 23,655,038 | $1.90B | 3.97% | +1,179,424+5.2% | Added |
| BlackRock Inc. | 23,108,831 | $1.85B | 0.04% | −163,962−0.7% | Reduced |
| State Street Corp | 13,811,808 | $1.12B | 0.05% | +18,872+0.1% | Added |
| Geode Capital Management, LLC | 7,320,486 | $587.1M | 0.05% | +255,710+3.6% | Added |
| Daiwa Securities Group Inc. | 4,562,165 | $365.9M | 2.06% | +475,849+11.6% | Added |
| Dimensional Fund Advisors LP | 4,286,593 | $343.8M | 0.09% | −1,8060.0% | Reduced |
| Capital World Investors | 4,116,123 | $330.2M | 0.05% | −9560.0% | Reduced |
| Deutsche Bank AG | 3,852,147 | $309.0M | 0.14% | −827,062−17.7% | Reduced |
| Morgan Stanley | 3,458,435 | $277.4M | 0.02% | −227,372−6.2% | Reduced |
| Norges Bank | 3,338,601 | $267.8M | 0.04% | +74,938+2.3% | Added |
| Charles Schwab Investment Management Inc | 3,225,161 | $258.7M | 0.06% | +67,480+2.1% | Added |
| Pictet Asset Management Holding SA | 3,088,633 | $247.7M | 0.27% | −297,163−8.8% | Reduced |
| FMR LLC | 2,968,422 | $238.1M | 0.02% | −554,463−15.7% | Reduced |
| Northern Trust Corp | 2,915,624 | $233.9M | 0.04% | −214,681−6.9% | Reduced |
| Amundi | 2,977,334 | $221.6M | 0.10% | +536,804+22.0% | Added |
| Wellington Management Group LLP | 2,648,454 | $212.4M | 0.04% | −280,176−9.6% | Reduced |
| JPMorgan Chase & Co | 2,455,076 | $196.9M | 0.02% | +359,823+17.2% | Added |
| Legal & General Group Plc | 2,163,415 | $173.5M | 0.05% | +10,481+0.5% | Added |
| Bank of New York Mellon Corp | 2,119,675 | $170.0M | 0.03% | −115,961−5.2% | Reduced |
| Invesco Ltd. | 2,010,493 | $161.3M | 0.03% | −1,409,736−41.2% | Reduced |
| Russell Investments Group, Ltd. | 2,006,989 | $161.0M | 0.25% | −74,797−3.6% | Reduced |
| Prudential Financial Inc | 1,862,942 | $149.4M | 0.21% | −366,593−16.4% | Reduced |
| Epoch Investment Partners, Inc. | 1,686,218 | $135.3M | 0.60% | −290,605−14.7% | Reduced |
| Nuveen Asset Management, LLC | 1,590,237 | $127.7M | 0.04% | +799,906+101.2% | Added |
| UBS Asset Management Americas Inc | 1,542,167 | $123.7M | 0.04% | −88,956−5.5% | Reduced |
| Centersquare Investment Management LLC | 1,538,486 | $119.3M | 1.38% | +1,519,237+7,892.6% | Added |
| Ameriprise Financial Inc | 1,471,946 | $118.9M | 0.03% | −123,720−7.8% | Reduced |
| Bank of America Corp | 1,321,226 | $106.0M | 0.01% | +173,428+15.1% | Added |
| Agf Management Ltd | 1,273,292 | $102.1M | 0.57% | +282,294+28.5% | Added |
| Citadel Advisors LLC | 1,271,739 | $102.0M | 0.10% | −711,113−35.9% | Reduced |
| DekaBank Deutsche Girozentrale | 1,126,012 | $90.8M | 0.17% | −16,105−1.4% | Reduced |
| CIBC Private Wealth Group, LLC | 1,056,807 | $84.1M | 0.16% | −21,794−2.0% | Reduced |
| UBS Group AG | 1,000,897 | $80.3M | 0.03% | +176,652+21.4% | Added |
| Millennium Management LLC | 958,517 | $76.9M | 0.07% | +897,862+1,480.3% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 956,189 | $76.7M | 0.05% | −7,170−0.7% | Reduced |
| SEI Investments Co | 943,728 | $75.7M | 0.11% | +68,636+7.8% | Added |
| Heitman Real Estate Securities LLC | 939,333 | $75.3M | 4.29% | +296,862+46.2% | Added |
| Canada Pension Plan Investment Board | 896,990 | $71.9M | 0.08% | −50,000−5.3% | Reduced |
| Duff & Phelps Investment Management Co | 895,705 | $71.8M | 0.86% | +839,635+1,497.5% | Added |
| Swiss National Bank | 874,461 | $70.1M | 0.05% | −38,100−4.2% | Reduced |
| Captrust Financial Advisors | 856,945 | $68.7M | 0.25% | +31,876+3.9% | Added |
| Point72 Asset Management, L.P. | 833,604 | $66.9M | 0.19% | +194,554+30.4% | Added |
| Goldman Sachs Group Inc | 820,313 | $65.8M | 0.01% | −119,777−12.7% | Reduced |
| American Century Companies Inc | 784,056 | $62.9M | 0.04% | +54,972+7.5% | Added |
| Welch & Forbes LLC | 727,641 | $58.4M | 0.80% | −3,937−0.5% | Reduced |
| Wells Fargo & Company | 717,300 | $57.5M | 0.02% | +62,378+9.5% | Added |
| Voloridge Investment Management, LLC | 686,771 | $55.1M | 0.20% | +65,541+10.6% | Added |
| Neuberger Berman Group LLC | 686,367 | $55.1M | 0.05% | +48,339+7.6% | Added |
| Rockefeller Capital Management L.P. | 662,217 | $53.1M | 0.16% | −119,634−15.3% | Reduced |
| Rhumbline Advisers | 637,535 | $51.1M | 0.05% | +462+0.1% | Added |
| Price T Rowe Associates Inc | 592,773 | $47.5M | 0.01% | +110,551+22.9% | Added |
| HSBC Holdings PLC | 587,382 | $47.1M | 0.03% | +167,661+39.9% | Added |
| Barclays PLC | 586,904 | $47.1M | 0.02% | −185,416−24.0% | Reduced |
| Asset Management One Co.,Ltd. | 580,202 | $46.5M | 0.18% | −9,496−1.6% | Reduced |
| Bank of Montreal | 580,181 | $46.5M | 0.02% | −28,037−4.6% | Reduced |
| Border to Coast Pensions Partnership Ltd | 561,040 | $45.0M | 1.00% | 00.0% | Unchanged |
| California Public Employees Retirement System | 540,387 | $43.3M | 0.03% | −14,454−2.6% | Reduced |
| Envestnet Asset Management Inc | 519,347 | $41.7M | 0.02% | +139,864+36.9% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 515,260 | $41.3M | 0.06% | +52,608+11.4% | Added |
| Credit Suisse AG | 505,639 | $40.6M | 0.04% | −27,938−5.2% | Reduced |
| California State Teachers Retirement System | 467,973 | $37.5M | 0.05% | +6,770+1.5% | Added |
| Stifel Financial Corp | 461,744 | $37.0M | 0.04% | −15,869−3.3% | Reduced |
| LPL Financial LLC | 458,001 | $36.7M | 0.02% | −60,434−11.7% | Reduced |
| Marble Harbor Investment Counsel, LLC | 446,081 | $35.8M | 4.12% | −7,386−1.6% | Reduced |
| Nomura Asset Management Co Ltd | 424,782 | $34.1M | 0.12% | +11,911+2.9% | Added |
| National Pension Service | 417,128 | $33.5M | 0.04% | +3,199+0.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 408,068 | $32.7M | 0.09% | −186,990−31.4% | Reduced |
| Cookson Peirce & Co Inc | 397,999 | $31.9M | 1.70% | −838−0.2% | Reduced |
| BNP Paribas Arbitrage, SA | 397,036 | $31.8M | 0.04% | +173,360+77.5% | Added |
| Alliancebernstein L.P. | 375,285 | $30.1M | 0.01% | −32,004−7.9% | Reduced |
| Great West Life Assurance Co | 362,134 | $29.1M | 0.06% | +1,716+0.5% | Added |
| Blair William & Co | 349,411 | $28.0M | 0.09% | +10,326+3.0% | Added |
| Raymond James & Associates | 348,798 | $28.0M | 0.02% | +8,118+2.4% | Added |
| Principal Financial Group Inc | 347,264 | $27.9M | 0.02% | +10,011+3.0% | Added |
| Royal Bank of Canada | 341,557 | $27.4M | 0.01% | −163,527−32.4% | Reduced |
| Aviva PLC | 338,646 | $27.2M | 0.09% | +4,490+1.3% | Added |
| Adell Harriman & Carpenter Inc | 327,558 | $26.3M | 2.16% | +2,560+0.8% | Added |
| Robeco Institutional Asset Management B.V. | 300,385 | $24.1M | 0.05% | +258,231+612.6% | Added |
| Andra AP-fonden | 294,974 | $23.7M | 0.42% | +170,474+136.9% | Added |
| Pacer Advisors, Inc. | 292,913 | $23.5M | 0.05% | −87,113−22.9% | Reduced |
| New York State Teachers Retirement System | 287,599 | $23.1M | 0.05% | −8,985−3.0% | Reduced |
| Adage Capital Partners GP, L.L.C. | 286,352 | $23.0M | 0.04% | +2,700+1.0% | Added |
| TD Asset Management Inc | 279,875 | $22.4M | 0.02% | −12,396−4.2% | Reduced |
| New York State Common Retirement Fund | 272,121 | $21.8M | 0.03% | −20,732−7.1% | Reduced |
| Polar Asset Management Partners Inc. | 264,600 | $21.2M | 0.57% | +124,000+88.2% | Added |
| Waterfront Capital Partners, LLC | 255,000 | $20.5M | 1.91% | +255,000 | New |
| Eventide Asset Management, LLC | 247,702 | $19.9M | 0.31% | +247,702 | New |
| Mirae Asset Global Investments Co., Ltd. | 356,750 | $19.8M | 0.04% | +9,184+2.6% | Added |
| CI Private Wealth, LLC | 246,717 | $19.8M | 0.04% | −62,322−20.2% | Reduced |
| United Bank | 246,489 | $19.8M | 2.36% | −41,480−14.4% | Reduced |
| Swedbank AB | 242,425 | $19.4M | 0.03% | +8,674+3.7% | Added |
| Retirement Systems of Alabama | 241,416 | $19.4M | 0.07% | +920.0% | Added |
| Crossmark Global Holdings, Inc. | 239,889 | $19.2M | 0.37% | −8,088−3.3% | Reduced |
| Citigroup Inc | 236,098 | $18.9M | 0.02% | +78,677+50.0% | Added |
| First Trust Advisors LP | 234,893 | $18.8M | 0.02% | −14,095−5.7% | Reduced |
| Standard Life Aberdeen plc | 233,340 | $18.7M | 0.04% | +5,456+2.4% | Added |
| Dana Investment Advisors, Inc. | 231,050 | $18.5M | 0.62% | −23,372−9.2% | Reduced |
| Cetera Investment Advisers | 229,863 | $18.4M | 0.04% | +201,448+708.9% | Added |
| Pinebridge Investments, L.P. | 228,192 | $18.3M | 0.15% | +228,192 | New |