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, Q3 2024
Institutional positions in Iron Mountain Inc as of Sep 30, 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
- 1,056
- +100 vs. Q2 2024
- Shares held
- 242.6M
- +22.7M (+10.3%) vs. Q2 2024
- Total value
- $28.8B
- +$9.07B (+46.0%) vs. Q2 2024
- New holders
- 165
- 323 more added
- Sold out
- 65
- 416 more reduced
11 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2024
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 46,603,838 | $5.54B | 0.10% | −39,514−0.1% | Reduced |
| BlackRock, Inc. | 31,309,637 | $3.72B | 0.08% | +31,309,637 | New |
| Cohen & Steers, Inc. | 17,726,012 | $2.11B | 3.75% | −5,325,004−23.1% | Reduced |
| State Street Corp | 16,567,777 | $1.98B | 0.08% | −948,401−5.4% | Reduced |
| Geode Capital Management, LLC | 8,257,965 | $978.5M | 0.08% | +128,622+1.6% | Added |
| Dimensional Fund Advisors LP | 4,204,166 | $499.6M | 0.12% | −81,902−1.9% | Reduced |
| Capital World Investors | 4,115,969 | $489.1M | 0.08% | −1770.0% | Reduced |
| Morgan Stanley | 3,640,914 | $432.6M | 0.03% | −14,572−0.4% | Reduced |
| Legal & General Group Plc | 3,509,980 | $417.1M | 0.11% | +56,689+1.6% | Added |
| Deutsche Bank AG | 3,477,450 | $413.2M | 0.17% | −446,273−11.4% | Reduced |
| Charles Schwab Investment Management Inc | 3,386,315 | $402.4M | 0.08% | +141,675+4.4% | Added |
| Norges Bank | 3,279,993 | $389.8M | 0.05% | +41,378+1.3% | Added |
| UBS Asset Management Americas Inc | 3,170,550 | $376.8M | 0.10% | +2,672,821+537.0% | Added |
| Daiwa Securities Group Inc. | 3,126,559 | $371.5M | 1.72% | −1,391,140−30.8% | Reduced |
| Northern Trust Corp | 2,771,730 | $329.4M | 0.05% | −196,692−6.6% | Reduced |
| Wellington Management Group LLP | 2,393,628 | $284.4M | 0.05% | −985,949−29.2% | Reduced |
| Pictet Asset Management Holding SA | 2,326,860 | $276.4M | 0.30% | −385,885−14.2% | Reduced |
| Agf Management Ltd | 2,224,856 | $264.4M | 1.34% | −20,537−0.9% | Reduced |
| JPMorgan Chase & Co | 2,185,870 | $259.7M | 0.02% | +50,614+2.4% | Added |
| Invesco Ltd. | 2,119,037 | $251.8M | 0.05% | −138,499−6.1% | Reduced |
| Russell Investments Group, Ltd. | 2,084,580 | $247.3M | 0.36% | −94,389−4.3% | Reduced |
| Bank of New York Mellon Corp | 2,078,400 | $247.0M | 0.05% | −47,837−2.2% | Reduced |
| Nuveen Asset Management, LLC | 1,833,946 | $218.4M | 0.06% | +153,047+9.1% | Added |
| Centersquare Investment Management LLC | 1,747,219 | $207.6M | 1.95% | −662,383−27.5% | Reduced |
| Ameriprise Financial Inc | 1,695,898 | $204.3M | 0.05% | +286,407+20.3% | Added |
| Amundi | 1,623,697 | $193.0M | 0.07% | −627,132−27.9% | Reduced |
| Prudential Financial Inc | 1,608,149 | $191.1M | 0.27% | −494,007−23.5% | Reduced |
| Goldman Sachs Group Inc | 1,307,203 | $155.3M | 0.03% | −308,101−19.1% | Reduced |
| Epoch Investment Partners, Inc. | 1,268,923 | $150.8M | 0.68% | −310,559−19.7% | Reduced |
| Bank of America Corp | 1,260,728 | $149.8M | 0.01% | −51,866−4.0% | Reduced |
| Duff & Phelps Investment Management Co | 1,240,606 | $147.4M | 1.69% | −57,724−4.4% | Reduced |
| DekaBank Deutsche Girozentrale | 1,122,500 | $131.6M | 0.24% | −60,015−5.1% | Reduced |
| PGGM Investments | 1,083,653 | $128.8M | 1.65% | +1,050,859+3,204.4% | Added |
| Canada Pension Plan Investment Board | 1,069,110 | $127.0M | 0.12% | +337,595+46.2% | Added |
| UBS Group AG | 1,061,134 | $126.1M | 0.04% | +413,042+63.7% | Added |
| CIBC Private Wealth Group, LLC | 1,024,943 | $121.8M | 0.22% | −24,273−2.3% | Reduced |
| Captrust Financial Advisors | 951,552 | $113.1M | 0.34% | +47,327+5.2% | Added |
| SEI Investments Co | 916,623 | $108.9M | 0.14% | −208,868−18.6% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 900,563 | $107.0M | 0.07% | −3,293−0.4% | Reduced |
| Swiss National Bank | 869,961 | $103.4M | 0.07% | +2,200+0.3% | Added |
| TD Asset Management Inc | 866,124 | $101.1M | 0.09% | +594,759+219.2% | Added |
| Price T Rowe Associates Inc | 820,134 | $97.5M | 0.01% | +187,308+29.6% | Added |
| American Century Companies Inc | 803,674 | $95.5M | 0.06% | −24,956−3.0% | Reduced |
| Wells Fargo & Company | 700,037 | $83.2M | 0.02% | +14,438+2.1% | Added |
| HSBC Holdings PLC | 697,488 | $82.8M | 0.05% | −8,304−1.2% | Reduced |
| Welch & Forbes LLC | 687,469 | $81.7M | 1.04% | −24,416−3.4% | Reduced |
| Rhumbline Advisers | 669,476 | $79.6M | 0.07% | −2,832−0.4% | Reduced |
| Neuberger Berman Group LLC | 652,616 | $77.6M | 0.06% | −1520.0% | Reduced |
| Bank of Montreal | 638,985 | $74.6M | 0.04% | +18,476+3.0% | Added |
| Standard Life Aberdeen plc | 626,280 | $73.8M | 0.14% | +293,425+88.2% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 611,874 | $72.7M | 0.08% | +34,840+6.0% | Added |
| FMR LLC | 611,049 | $72.6M | 0.00% | −2,681,971−81.4% | Reduced |
| Heitman Real Estate Securities LLC | 610,200 | $72.5M | 3.95% | −155,361−20.3% | Reduced |
| Alliancebernstein L.P. | 609,232 | $72.4M | 0.02% | −5,614−0.9% | Reduced |
| Barclays PLC | 591,302 | $70.3M | 0.03% | −45,659−7.2% | Reduced |
| LPL Financial LLC | 590,630 | $70.2M | 0.03% | +89,131+17.8% | Added |
| Rockefeller Capital Management L.P. | 580,819 | $69.0M | 0.19% | −182,825−23.9% | Reduced |
| Asset Management One Co.,Ltd. | 570,237 | $67.8M | 0.24% | +3,571+0.6% | Added |
| Acadian Asset Management LLC | 560,640 | $66.6M | 0.21% | +476,415+565.6% | Added |
| California Public Employees Retirement System | 523,387 | $62.2M | 0.04% | −8,439−1.6% | Reduced |
| BNP Paribas Arbitrage, SA | 519,264 | $61.7M | 0.06% | +269,844+108.2% | Added |
| Royal Bank of Canada | 493,303 | $58.6M | 0.01% | +155,461+46.0% | Added |
| APG Asset Management US Inc. | 480,000 | $56.8M | 0.38% | +80,000+20.0% | Added |
| Border to Coast Pensions Partnership Ltd | 475,000 | $56.3M | 1.15% | −90,000−15.9% | Reduced |
| California State Teachers Retirement System | 470,341 | $55.9M | 0.07% | −5,005−1.1% | Reduced |
| Cookson Peirce & Co Inc | 459,515 | $54.6M | 2.56% | −2,308−0.5% | Reduced |
| National Pension Service | 459,478 | $54.6M | 0.05% | +61,187+15.4% | Added |
| Nomura Asset Management Co Ltd | 456,295 | $54.2M | 0.17% | +7,023+1.6% | Added |
| Envestnet Asset Management Inc | 455,603 | $54.1M | 0.02% | −46,849−9.3% | Reduced |
| Aviva PLC | 437,599 | $52.0M | 0.13% | −17,666−3.9% | Reduced |
| Aew Capital Management L P | 436,397 | $51.9M | 2.23% | −152,503−25.9% | Reduced |
| Great West Life Assurance Co | 420,257 | $50.0M | 0.09% | +14,101+3.5% | Added |
| Adelante Capital Management LLC | 397,223 | $47.2M | 3.05% | +381,596+2,441.9% | Added |
| Principal Financial Group Inc | 352,451 | $41.9M | 0.02% | +11,685+3.4% | Added |
| Marble Harbor Investment Counsel, LLC | 350,001 | $41.6M | 4.55% | −88,959−20.3% | Reduced |
| Raymond James & Associates | 348,747 | $41.4M | 0.03% | −5,335−1.5% | Reduced |
| Eventide Asset Management, LLC | 343,836 | $40.9M | 0.70% | +43,923+14.6% | Added |
| Blair William & Co | 333,944 | $39.7M | 0.12% | −14,202−4.1% | Reduced |
| Adell Harriman & Carpenter Inc | 328,370 | $39.0M | 2.84% | −4,305−1.3% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 309,293 | $36.8M | 0.09% | −19,743−6.0% | Reduced |
| KBC Group NV | 305,392 | $36.3M | 0.11% | +240,195+368.4% | Added |
| State Board of Administration of Florida Retirement System | 290,306 | $34.5M | 0.07% | −18,540−6.0% | Reduced |
| Macquarie Group Ltd | 285,069 | $33.9M | 0.04% | −15,689−5.2% | Reduced |
| Stifel Financial Corp | 279,961 | $33.3M | 0.03% | −106,556−27.6% | Reduced |
| Twin Tree Management, LP | 274,438 | $32.6M | 0.76% | +274,438 | New |
| Citigroup Inc | 268,389 | $31.9M | 0.03% | +20,905+8.4% | Added |
| New York State Teachers Retirement System | 261,188 | $31.0M | 0.06% | −6,866−2.6% | Reduced |
| First Trust Advisors LP | 250,856 | $29.8M | 0.03% | +43,087+20.7% | Added |
| Waterfront Capital Partners, LLC | 240,592 | $28.6M | 5.25% | −197,141−45.0% | Reduced |
| Retirement Systems of Alabama | 233,044 | $27.7M | 0.10% | −1,270−0.5% | Reduced |
| Andra AP-fonden | 231,900 | $27.6M | 0.41% | −400−0.2% | Reduced |
| Swedbank AB | 228,052 | $27.1M | 0.03% | −1,160−0.5% | Reduced |
| Ensign Peak Advisors, Inc | 224,441 | $26.7M | 0.05% | +755+0.3% | Added |
| Commonwealth Equity Services, LLC | 222,702 | $26.5M | 0.04% | −7,834−3.4% | Reduced |
| Point72 Asset Management, L.P. | 222,409 | $26.4M | 0.09% | +222,409 | New |
| CI Private Wealth, LLC | 222,229 | $26.4M | 0.04% | −15,448−6.5% | Reduced |
| United Bank | 218,463 | $26.0M | 3.02% | −2,357−1.1% | Reduced |
| Regions Financial Corp | 218,461 | $26.0M | 0.19% | +218,461 | New |
| Moran Wealth Management, LLC | 215,147 | $25.6M | 0.79% | −9,456−4.2% | Reduced |
| Intech Investment Management LLC | 210,155 | $25.0M | 0.28% | +62,441+42.3% | Added |