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, Q4 2024
Institutional positions in Iron Mountain Inc as of Dec 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
- 1,067
- +30 vs. Q3 2024
- Shares held
- 237.3M
- −4.59M (−1.9%) vs. Q3 2024
- Total value
- $24.9B
- −$3.75B (−13.1%) vs. Q3 2024
- New holders
- 139
- 364 more added
- Sold out
- 109
- 409 more reduced
19 institutions that held it in Q3 2024 haven't filed for Q4 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2024
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q3 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Vanguard Group Inc | 46,605,170 | $4.90B | 0.09% | +1,3320.0% | Added |
| BlackRock, Inc. | 32,072,872 | $3.37B | 0.07% | +763,235+2.4% | Added |
| State Street Corp | 16,621,783 | $1.76B | 0.07% | +54,006+0.3% | Added |
| Cohen & Steers, Inc. | 14,907,846 | $1.57B | 2.97% | −2,818,166−15.9% | Reduced |
| Geode Capital Management, LLC | 7,912,109 | $832.9M | 0.06% | −345,856−4.2% | Reduced |
| Northern Trust Corp | 4,326,476 | $454.8M | 0.06% | +1,554,746+56.1% | Added |
| Dimensional Fund Advisors LP | 4,219,263 | $443.5M | 0.11% | +15,097+0.4% | Added |
| Capital World Investors | 3,817,417 | $401.2M | 0.06% | −298,552−7.3% | Reduced |
| Charles Schwab Investment Management Inc | 3,478,790 | $365.7M | 0.07% | +92,475+2.7% | Added |
| Morgan Stanley | 3,386,215 | $355.9M | 0.02% | −254,699−7.0% | Reduced |
| Norges Bank | 3,313,186 | $348.2M | 0.05% | +33,193+1.0% | Added |
| Deutsche Bank AG | 3,253,738 | $342.0M | 0.13% | −223,712−6.4% | Reduced |
| Legal & General Group Plc | 3,182,440 | $334.5M | 0.09% | −327,540−9.3% | Reduced |
| Daiwa Securities Group Inc. | 2,947,121 | $309.8M | 1.38% | −179,438−5.7% | Reduced |
| Nuveen Asset Management, LLC | 2,548,970 | $267.9M | 0.08% | +715,024+39.0% | Added |
| Invesco Ltd. | 2,482,820 | $261.0M | 0.05% | +363,783+17.2% | Added |
| Pictet Asset Management Holding SA | 2,329,022 | $244.8M | 0.26% | +2,162+0.1% | Added |
| Agf Management Ltd | 2,133,904 | $224.3M | 1.12% | −90,952−4.1% | Reduced |
| Bank of New York Mellon Corp | 2,034,912 | $213.9M | 0.04% | −43,488−2.1% | Reduced |
| TD Asset Management Inc | 1,952,432 | $205.2M | 0.18% | +1,086,308+125.4% | Added |
| Russell Investments Group, Ltd. | 1,855,832 | $195.0M | 0.27% | −228,748−11.0% | Reduced |
| JPMorgan Chase & Co | 1,750,066 | $183.9M | 0.01% | −435,804−19.9% | Reduced |
| Centersquare Investment Management LLC | 1,706,252 | $179.3M | 1.89% | −40,967−2.3% | Reduced |
| Ameriprise Financial Inc | 1,590,370 | $167.3M | 0.04% | −105,528−6.2% | Reduced |
| Wellington Management Group LLP | 1,547,708 | $162.7M | 0.03% | −845,920−35.3% | Reduced |
| Bank of America Corp | 1,478,520 | $155.4M | 0.01% | +217,792+17.3% | Added |
| Amundi | 1,438,801 | $148.0M | 0.05% | −184,896−11.4% | Reduced |
| Prudential Financial Inc | 1,363,213 | $143.3M | 0.20% | −244,936−15.2% | Reduced |
| Duff & Phelps Investment Management Co | 1,246,311 | $131.0M | 1.57% | +5,705+0.5% | Added |
| Point72 Asset Management, L.P. | 1,200,660 | $126.2M | 0.35% | +978,251+439.8% | Added |
| DekaBank Deutsche Girozentrale | 1,122,500 | $116.3M | 0.22% | 00.0% | Unchanged |
| PGGM Investments | 1,084,387 | $114.0M | 1.52% | +734+0.1% | Added |
| Goldman Sachs Group Inc | 1,061,207 | $111.5M | 0.02% | −245,996−18.8% | Reduced |
| CIBC Private Wealth Group, LLC | 1,016,176 | $104.5M | 0.19% | −8,767−0.9% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 910,723 | $95.7M | 0.06% | +10,160+1.1% | Added |
| UBS Group AG | 903,264 | $94.9M | 0.02% | −157,870−14.9% | Reduced |
| Price T Rowe Associates Inc | 877,238 | $92.2M | 0.01% | +57,104+7.0% | Added |
| SEI Investments Co | 848,367 | $89.2M | 0.11% | −68,256−7.4% | Reduced |
| Swiss National Bank | 828,761 | $87.1M | 0.06% | −41,200−4.7% | Reduced |
| Captrust Financial Advisors | 796,317 | $83.7M | 0.24% | −155,235−16.3% | Reduced |
| Epoch Investment Partners, Inc. | 747,550 | $78.6M | 0.38% | −521,373−41.1% | Reduced |
| HSBC Holdings PLC | 743,548 | $78.0M | 0.05% | +46,060+6.6% | Added |
| Welch & Forbes LLC | 679,762 | $71.4M | 0.92% | −7,707−1.1% | Reduced |
| Aew Capital Management L P | 678,887 | $71.4M | 3.45% | +242,490+55.6% | Added |
| FMR LLC | 667,739 | $70.2M | 0.00% | +56,690+9.3% | Added |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 657,443 | $69.5M | 0.07% | +45,569+7.4% | Added |
| Wells Fargo & Company | 660,778 | $69.5M | 0.02% | −39,259−5.6% | Reduced |
| Rhumbline Advisers | 637,206 | $67.0M | 0.06% | −32,270−4.8% | Reduced |
| Bank of Montreal | 630,709 | $66.3M | 0.03% | −8,276−1.3% | Reduced |
| American Century Companies Inc | 625,395 | $65.7M | 0.04% | −178,279−22.2% | Reduced |
| Standard Life Aberdeen plc | 630,036 | $65.4M | 0.12% | +3,756+0.6% | Added |
| Citadel Advisors LLC | 604,340 | $63.5M | 0.06% | +538,470+817.5% | Added |
| LPL Financial LLC | 568,835 | $59.8M | 0.02% | −21,795−3.7% | Reduced |
| Asset Management One Co.,Ltd. | 562,541 | $58.9M | 0.20% | −7,696−1.3% | Reduced |
| Alliancebernstein L.P. | 555,832 | $58.4M | 0.02% | −53,400−8.8% | Reduced |
| Cbre Clarion Securities LLC | 541,028 | $56.9M | 1.01% | +331,536+158.3% | Added |
| Raymond James Financial Inc | 525,841 | $55.3M | 0.02% | +525,841 | New |
| Neuberger Berman Group LLC | 515,234 | $54.2M | 0.04% | −137,382−21.1% | Reduced |
| APG Asset Management US Inc. | 514,208 | $54.0M | 0.41% | +34,208+7.1% | Added |
| Royal Bank of Canada | 500,617 | $52.6M | 0.01% | +7,314+1.5% | Added |
| BNP Paribas Arbitrage, SA | 497,147 | $52.3M | 0.04% | −22,117−4.3% | Reduced |
| California Public Employees Retirement System | 496,456 | $52.2M | 0.03% | −26,931−5.1% | Reduced |
| Nomura Asset Management Co Ltd | 474,591 | $49.9M | 0.15% | +18,296+4.0% | Added |
| Border to Coast Pensions Partnership Ltd | 460,000 | $48.3M | 0.95% | −15,000−3.2% | Reduced |
| Cookson Peirce & Co Inc | 454,552 | $47.8M | 2.17% | −4,963−1.1% | Reduced |
| Adelante Capital Management LLC | 445,897 | $46.9M | 3.26% | +48,674+12.3% | Added |
| Great West Life Assurance Co | 435,397 | $45.7M | 0.08% | +15,140+3.6% | Added |
| California State Teachers Retirement System | 434,493 | $45.7M | 0.05% | −35,848−7.6% | Reduced |
| Aviva PLC | 429,473 | $45.1M | 0.12% | −8,126−1.9% | Reduced |
| UBS Asset Management Americas Inc | 426,223 | $44.8M | 0.01% | −2,744,327−86.6% | Reduced |
| Intech Investment Management LLC | 420,200 | $44.2M | 0.43% | +210,045+99.9% | Added |
| Principal Financial Group Inc | 415,368 | $43.7M | 0.02% | +62,917+17.9% | Added |
| Barclays PLC | 405,421 | $42.6M | 0.02% | −185,881−31.4% | Reduced |
| National Pension Service | 402,813 | $42.3M | 0.04% | −56,665−12.3% | Reduced |
| KBC Group NV | 402,261 | $42.3M | 0.12% | +96,869+31.7% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 377,576 | $39.7M | 0.08% | +377,576 | New |
| Eventide Asset Management, LLC | 373,863 | $39.3M | 0.72% | +30,027+8.7% | Added |
| Balyasny Asset Management LLC | 366,668 | $38.5M | 0.09% | +359,614+5,098.0% | Added |
| Marble Harbor Investment Counsel, LLC | 346,570 | $36.4M | 4.02% | −3,431−1.0% | Reduced |
| Blair William & Co | 334,522 | $35.2M | 0.10% | +578+0.2% | Added |
| Adell Harriman & Carpenter Inc | 329,829 | $34.7M | 2.41% | +1,459+0.4% | Added |
| Rockefeller Capital Management L.P. | 312,873 | $32.9M | 0.09% | −267,946−46.1% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 294,679 | $31.0M | 0.08% | −14,614−4.7% | Reduced |
| State Board of Administration of Florida Retirement System | 289,226 | $30.4M | 0.06% | −1,080−0.4% | Reduced |
| Swedbank AB | 288,938 | $30.4M | 0.04% | +60,886+26.7% | Added |
| Stifel Financial Corp | 269,834 | $28.4M | 0.03% | −10,127−3.6% | Reduced |
| New York State Teachers Retirement System | 252,631 | $26.6M | 0.06% | −8,557−3.3% | Reduced |
| Macquarie Group Ltd | 258,972 | $26.0M | 0.03% | −26,097−9.2% | Reduced |
| Envestnet Asset Management Inc | 245,463 | $25.8M | 0.01% | −210,140−46.1% | Reduced |
| Waterfront Capital Partners, LLC | 237,847 | $25.0M | 4.67% | −2,745−1.1% | Reduced |
| Schonfeld Strategic Advisors LLC | 235,628 | $24.8M | 0.16% | +220,673+1,475.6% | Added |
| Andra AP-fonden | 234,000 | $24.6M | 0.39% | +2,100+0.9% | Added |
| Retirement Systems of Alabama | 233,176 | $24.5M | 0.09% | +132+0.1% | Added |
| Ensign Peak Advisors, Inc | 232,200 | $24.4M | 0.04% | +7,759+3.5% | Added |
| Regions Financial Corp | 230,776 | $24.3M | 0.18% | +12,315+5.6% | Added |
| Credit Agricole S A | 229,068 | $24.1M | 0.08% | +42,796+23.0% | Added |
| Public Sector Pension Investment Board | 225,181 | $23.7M | 0.10% | +174,053+340.4% | Added |
| Commonwealth Equity Services, LLC | 225,063 | $23.7M | 0.03% | +2,361+1.1% | Added |
| Man Group plc | 220,738 | $23.2M | 0.07% | +163,798+287.7% | Added |
| First Trust Advisors LP | 219,258 | $23.0M | 0.02% | −31,598−12.6% | Reduced |