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, Q1 2025
Institutional positions in Iron Mountain Inc as of Mar 31, 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
- 995
- −56 vs. Q4 2024
- Shares held
- 245.2M
- +10.9M (+4.6%) vs. Q4 2024
- Total value
- $21.1B
- −$3.56B (−14.4%) vs. Q4 2024
- New holders
- 88
- 348 more added
- Sold out
- 144
- 401 more reduced
16 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Retirement Systems of Alabama | 232,002 | $20.0M | 0.08% | −1,174−0.5% | Reduced |
| National Bank of Canada | 239,676 | $20.6M | 0.02% | +88,058+58.1% | Added |
| Regions Financial Corp | 241,276 | $20.8M | 0.15% | +10,500+4.5% | Added |
| Pacer Advisors, Inc. | 244,486 | $21.0M | 0.05% | +32,942+15.6% | Added |
| Worldquant Millennium Advisors LLC | 260,981 | $22.5M | 0.14% | +260,981 | New |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 265,331 | $22.8M | 0.06% | −29,348−10.0% | Reduced |
| Andra AP-fonden | 274,800 | $23.6M | 0.39% | +40,800+17.4% | Added |
| Macquarie Group Ltd | 283,256 | $24.4M | 0.03% | +24,284+9.4% | Added |
| State Board of Administration of Florida Retirement System | 289,806 | $24.9M | 0.05% | +580+0.2% | Added |
| Jump Financial, LLC | 301,333 | $25.9M | 0.39% | +264,847+725.9% | Added |
| Standard Life Aberdeen plc | 308,646 | $26.4M | 0.05% | −321,390−51.0% | Reduced |
| Adage Capital Partners GP, L.L.C. | 318,052 | $27.4M | 0.05% | +203,900+178.6% | Added |
| Adell Harriman & Carpenter Inc | 321,834 | $27.7M | 2.09% | −7,995−2.4% | Reduced |
| Waterfront Capital Partners, LLC | 325,120 | $28.0M | 4.79% | +87,273+36.7% | Added |
| Blair William & Co | 330,538 | $28.4M | 0.09% | −3,984−1.2% | Reduced |
| Marble Harbor Investment Counsel, LLC | 333,588 | $28.7M | 3.23% | −12,982−3.7% | Reduced |
| Korea Investment CORP | 335,070 | $28.8M | 0.07% | +136,228+68.5% | Added |
| Storebrand Asset Management AS | 338,906 | $29.2M | 0.09% | +138,214+68.9% | Added |
| Aviva PLC | 354,186 | $30.5M | 0.07% | −75,287−17.5% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 367,597 | $31.6M | 0.06% | −9,979−2.6% | Reduced |
| Raymond James Financial Inc | 387,280 | $33.3M | 0.01% | −138,561−26.4% | Reduced |
| Bank of Montreal | 418,536 | $36.0M | 0.02% | −212,173−33.6% | Reduced |
| UBS Asset Management Americas Inc | 422,423 | $36.3M | 0.01% | −3,800−0.9% | Reduced |
| Rockefeller Capital Management L.P. | 427,565 | $36.9M | 0.09% | +114,692+36.7% | Added |
| California State Teachers Retirement System | 430,924 | $37.1M | 0.05% | −3,569−0.8% | Reduced |
| Great West Life Assurance Co | 443,469 | $38.3M | 0.07% | +8,072+1.9% | Added |
| Intech Investment Management LLC | 448,761 | $38.6M | 0.40% | +28,561+6.8% | Added |
| National Pension Service | 472,921 | $40.7M | 0.04% | +70,108+17.4% | Added |
| American Century Companies Inc | 479,116 | $41.2M | 0.03% | −146,279−23.4% | Reduced |
| California Public Employees Retirement System | 479,201 | $41.2M | 0.03% | −17,255−3.5% | Reduced |
| Border to Coast Pensions Partnership Ltd | 480,000 | $41.3M | 0.85% | +20,000+4.3% | Added |
| Royal Bank of Canada | 497,929 | $42.8M | 0.01% | −2,688−0.5% | Reduced |
| Nomura Asset Management Co Ltd | 498,109 | $42.9M | 0.13% | +23,518+5.0% | Added |
| Heitman Real Estate Securities LLC | 540,037 | $46.5M | 3.01% | +388,353+256.0% | Added |
| Balyasny Asset Management LLC | 553,548 | $47.6M | 0.12% | +186,880+51.0% | Added |
| Asset Management One Co.,Ltd. | 555,014 | $47.8M | 0.17% | −7,527−1.3% | Reduced |
| BNP Paribas Arbitrage, SA | 578,174 | $49.7M | 0.04% | +81,027+16.3% | Added |
| APG Asset Management US Inc. | 582,174 | $50.6M | 0.39% | +67,966+13.2% | Added |
| Alliancebernstein L.P. | 599,714 | $51.6M | 0.02% | +43,882+7.9% | Added |
| Wells Fargo & Company | 608,065 | $52.3M | 0.01% | −52,713−8.0% | Reduced |
| LPL Financial LLC | 630,809 | $54.3M | 0.02% | +61,974+10.9% | Added |
| Barclays PLC | 644,046 | $55.4M | 0.03% | +238,625+58.9% | Added |
| CIBC Private Wealth Group, LLC | 736,855 | $56.7M | 0.12% | −279,321−27.5% | Reduced |
| Rhumbline Advisers | 664,001 | $57.1M | 0.05% | +26,795+4.2% | Added |
| Aew Capital Management L P | 669,267 | $57.6M | 2.82% | −9,620−1.4% | Reduced |
| Welch & Forbes LLC | 674,042 | $58.0M | 0.76% | −5,720−0.8% | Reduced |
| Millennium Management LLC | 695,894 | $59.9M | 0.06% | +666,681+2,282.1% | Added |
| Epoch Investment Partners, Inc. | 714,025 | $61.4M | 0.32% | −33,525−4.5% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 717,248 | $61.7M | 0.06% | +59,805+9.1% | Added |
| Voloridge Investment Management, LLC | 740,591 | $63.7M | 0.24% | +649,018+708.7% | Added |
| Cbre Clarion Securities LLC | 772,190 | $66.4M | 1.02% | +231,162+42.7% | Added |
| Captrust Financial Advisors | 803,623 | $69.1M | 0.17% | +7,306+0.9% | Added |
| D. E. Shaw & Co., Inc. | 817,446 | $70.3M | 0.08% | +806,746+7,539.7% | Added |
| HSBC Holdings PLC | 819,862 | $70.5M | 0.05% | +76,314+10.3% | Added |
| Price T Rowe Associates Inc | 824,103 | $70.9M | 0.01% | −53,135−6.1% | Reduced |
| Swiss National Bank | 827,561 | $71.2M | 0.05% | −1,200−0.1% | Reduced |
| SEI Investments Co | 829,835 | $71.4M | 0.09% | −18,532−2.2% | Reduced |
| Qube Research & Technologies Ltd | 897,982 | $77.3M | 0.12% | +761,650+558.7% | Added |
| Principal Financial Group Inc | 904,184 | $77.8M | 0.04% | +488,816+117.7% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 1,047,116 | $90.1M | 0.06% | +136,393+15.0% | Added |
| Amundi | 1,099,934 | $91.4M | 0.03% | −338,867−23.6% | Reduced |
| Wellington Management Group LLP | 1,067,364 | $91.8M | 0.02% | −480,344−31.0% | Reduced |
| DekaBank Deutsche Girozentrale | 1,126,012 | $95.1M | 0.19% | +3,512+0.3% | Added |
| Bank of America Corp | 1,115,592 | $96.0M | 0.01% | −362,928−24.5% | Reduced |
| UBS Group AG | 1,145,286 | $98.5M | 0.02% | +242,022+26.8% | Added |
| Citadel Advisors LLC | 1,251,792 | $107.7M | 0.11% | +647,452+107.1% | Added |
| Duff & Phelps Investment Management Co | 1,331,161 | $114.5M | 1.34% | +84,850+6.8% | Added |
| Prudential Financial Inc | 1,344,479 | $115.7M | 0.16% | −18,734−1.4% | Reduced |
| Contour Asset Management LLC | 1,427,250 | $122.8M | 5.12% | +1,427,250 | New |
| Ameriprise Financial Inc | 1,554,684 | $132.4M | 0.04% | −35,686−2.2% | Reduced |
| PGGM Investments | 1,597,968 | $137.5M | 1.85% | +513,581+47.4% | Added |
| Russell Investments Group, Ltd. | 1,771,114 | $152.3M | 0.21% | −84,718−4.6% | Reduced |
| Bank of New York Mellon Corp | 1,861,318 | $160.1M | 0.03% | −173,594−8.5% | Reduced |
| Goldman Sachs Group Inc | 1,974,922 | $169.9M | 0.03% | +913,715+86.1% | Added |
| Centersquare Investment Management LLC | 2,008,437 | $172.8M | 1.79% | +302,185+17.7% | Added |
| JPMorgan Chase & Co | 2,061,560 | $177.4M | 0.01% | +311,494+17.8% | Added |
| Point72 Asset Management, L.P. | 2,075,282 | $178.6M | 0.50% | +874,622+72.8% | Added |
| Capital World Investors | 2,117,169 | $182.2M | 0.03% | −1,700,248−44.5% | Reduced |
| Nuveen, LLC | 2,234,200 | $192.2M | 0.06% | +2,234,200 | New |
| Pictet Asset Management Holding SA | 2,476,597 | $213.0M | 0.24% | +147,575+6.3% | Added |
| Daiwa Securities Group Inc. | 2,752,467 | $236.8M | 1.00% | −194,654−6.6% | Reduced |
| Invesco Ltd. | 2,848,954 | $245.1M | 0.05% | +366,134+14.7% | Added |
| Deutsche Bank AG | 3,144,827 | $270.6M | 0.11% | −108,911−3.3% | Reduced |
| Legal & General Group Plc | 3,183,998 | $274.0M | 0.07% | +1,5580.0% | Added |
| Morgan Stanley | 3,389,039 | $291.6M | 0.02% | +2,824+0.1% | Added |
| Charles Schwab Investment Management Inc | 3,487,479 | $300.1M | 0.06% | +8,689+0.2% | Added |
| Norges Bank | 3,691,474 | $317.6M | 0.04% | +378,288+11.4% | Added |
| Dimensional Fund Advisors LP | 4,256,417 | $366.2M | 0.09% | +37,154+0.9% | Added |
| Northern Trust Corp | 4,267,324 | $367.2M | 0.05% | −59,152−1.4% | Reduced |
| FMR LLC | 5,286,735 | $454.9M | 0.03% | +4,618,996+691.7% | Added |
| Geode Capital Management, LLC | 8,283,383 | $715.9M | 0.06% | +371,274+4.7% | Added |
| Cohen & Steers, Inc. | 13,481,902 | $1.16B | 2.14% | −1,425,944−9.6% | Reduced |
| State Street Corp | 16,705,119 | $1.45B | 0.06% | +83,336+0.5% | Added |
| BlackRock, Inc. | 35,222,779 | $3.03B | 0.06% | +3,149,907+9.8% | Added |
| Vanguard Group Inc | 46,825,734 | $4.03B | 0.07% | +220,564+0.5% | Added |
| Proequities, Inc. | 0 | $0 | 0.00% | −12,293−100.0% | Sold out |
| Agf Management Ltd | 0 | $0 | 0.00% | −2,133,904−100.0% | Sold out |
| Eventide Asset Management, LLC | 0 | $0 | 0.00% | −373,863−100.0% | Sold out |
| Churchill Management Corp | 0 | $0 | 0.00% | −173,539−100.0% | Sold out |
| Bamco Inc | 0 | $0 | 0.00% | −90,138−100.0% | Sold out |