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, 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 |
|---|---|---|---|---|---|
| Great West Life Assurance Co | 435,397 | $45.7M | 0.08% | +15,140+3.6% | Added |
| Adelante Capital Management LLC | 445,897 | $46.9M | 3.26% | +48,674+12.3% | Added |
| Cookson Peirce & Co Inc | 454,552 | $47.8M | 2.17% | −4,963−1.1% | Reduced |
| Border to Coast Pensions Partnership Ltd | 460,000 | $48.3M | 0.95% | −15,000−3.2% | Reduced |
| Nomura Asset Management Co Ltd | 474,591 | $49.9M | 0.15% | +18,296+4.0% | Added |
| California Public Employees Retirement System | 496,456 | $52.2M | 0.03% | −26,931−5.1% | Reduced |
| BNP Paribas Arbitrage, SA | 497,147 | $52.3M | 0.04% | −22,117−4.3% | Reduced |
| Royal Bank of Canada | 500,617 | $52.6M | 0.01% | +7,314+1.5% | Added |
| APG Asset Management US Inc. | 514,208 | $54.0M | 0.41% | +34,208+7.1% | Added |
| Neuberger Berman Group LLC | 515,234 | $54.2M | 0.04% | −137,382−21.1% | Reduced |
| Raymond James Financial Inc | 525,841 | $55.3M | 0.02% | +525,841 | New |
| Cbre Clarion Securities LLC | 541,028 | $56.9M | 1.01% | +331,536+158.3% | Added |
| Alliancebernstein L.P. | 555,832 | $58.4M | 0.02% | −53,400−8.8% | Reduced |
| Asset Management One Co.,Ltd. | 562,541 | $58.9M | 0.20% | −7,696−1.3% | Reduced |
| LPL Financial LLC | 568,835 | $59.8M | 0.02% | −21,795−3.7% | Reduced |
| Citadel Advisors LLC | 604,340 | $63.5M | 0.06% | +538,470+817.5% | Added |
| Standard Life Aberdeen plc | 630,036 | $65.4M | 0.12% | +3,756+0.6% | Added |
| American Century Companies Inc | 625,395 | $65.7M | 0.04% | −178,279−22.2% | Reduced |
| Bank of Montreal | 630,709 | $66.3M | 0.03% | −8,276−1.3% | Reduced |
| Rhumbline Advisers | 637,206 | $67.0M | 0.06% | −32,270−4.8% | Reduced |
| Wells Fargo & Company | 660,778 | $69.5M | 0.02% | −39,259−5.6% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 657,443 | $69.5M | 0.07% | +45,569+7.4% | Added |
| FMR LLC | 667,739 | $70.2M | 0.00% | +56,690+9.3% | Added |
| Aew Capital Management L P | 678,887 | $71.4M | 3.45% | +242,490+55.6% | Added |
| Welch & Forbes LLC | 679,762 | $71.4M | 0.92% | −7,707−1.1% | Reduced |
| HSBC Holdings PLC | 743,548 | $78.0M | 0.05% | +46,060+6.6% | Added |
| Epoch Investment Partners, Inc. | 747,550 | $78.6M | 0.38% | −521,373−41.1% | Reduced |
| Captrust Financial Advisors | 796,317 | $83.7M | 0.24% | −155,235−16.3% | Reduced |
| Swiss National Bank | 828,761 | $87.1M | 0.06% | −41,200−4.7% | Reduced |
| SEI Investments Co | 848,367 | $89.2M | 0.11% | −68,256−7.4% | Reduced |
| Price T Rowe Associates Inc | 877,238 | $92.2M | 0.01% | +57,104+7.0% | Added |
| UBS Group AG | 903,264 | $94.9M | 0.02% | −157,870−14.9% | Reduced |
| Sumitomo Mitsui Trust Holdings, Inc. | 910,723 | $95.7M | 0.06% | +10,160+1.1% | Added |
| CIBC Private Wealth Group, LLC | 1,016,176 | $104.5M | 0.19% | −8,767−0.9% | Reduced |
| Goldman Sachs Group Inc | 1,061,207 | $111.5M | 0.02% | −245,996−18.8% | Reduced |
| PGGM Investments | 1,084,387 | $114.0M | 1.52% | +734+0.1% | Added |
| DekaBank Deutsche Girozentrale | 1,122,500 | $116.3M | 0.22% | 00.0% | Unchanged |
| Point72 Asset Management, L.P. | 1,200,660 | $126.2M | 0.35% | +978,251+439.8% | Added |
| Duff & Phelps Investment Management Co | 1,246,311 | $131.0M | 1.57% | +5,705+0.5% | Added |
| Prudential Financial Inc | 1,363,213 | $143.3M | 0.20% | −244,936−15.2% | Reduced |
| Amundi | 1,438,801 | $148.0M | 0.05% | −184,896−11.4% | Reduced |
| Bank of America Corp | 1,478,520 | $155.4M | 0.01% | +217,792+17.3% | Added |
| Wellington Management Group LLP | 1,547,708 | $162.7M | 0.03% | −845,920−35.3% | Reduced |
| Ameriprise Financial Inc | 1,590,370 | $167.3M | 0.04% | −105,528−6.2% | Reduced |
| Centersquare Investment Management LLC | 1,706,252 | $179.3M | 1.89% | −40,967−2.3% | Reduced |
| JPMorgan Chase & Co | 1,750,066 | $183.9M | 0.01% | −435,804−19.9% | Reduced |
| Russell Investments Group, Ltd. | 1,855,832 | $195.0M | 0.27% | −228,748−11.0% | Reduced |
| TD Asset Management Inc | 1,952,432 | $205.2M | 0.18% | +1,086,308+125.4% | Added |
| Bank of New York Mellon Corp | 2,034,912 | $213.9M | 0.04% | −43,488−2.1% | Reduced |
| Agf Management Ltd | 2,133,904 | $224.3M | 1.12% | −90,952−4.1% | Reduced |
| Pictet Asset Management Holding SA | 2,329,022 | $244.8M | 0.26% | +2,162+0.1% | Added |
| Invesco Ltd. | 2,482,820 | $261.0M | 0.05% | +363,783+17.2% | Added |
| Nuveen Asset Management, LLC | 2,548,970 | $267.9M | 0.08% | +715,024+39.0% | Added |
| Daiwa Securities Group Inc. | 2,947,121 | $309.8M | 1.38% | −179,438−5.7% | Reduced |
| Legal & General Group Plc | 3,182,440 | $334.5M | 0.09% | −327,540−9.3% | Reduced |
| Deutsche Bank AG | 3,253,738 | $342.0M | 0.13% | −223,712−6.4% | Reduced |
| Norges Bank | 3,313,186 | $348.2M | 0.05% | +33,193+1.0% | Added |
| Morgan Stanley | 3,386,215 | $355.9M | 0.02% | −254,699−7.0% | Reduced |
| Charles Schwab Investment Management Inc | 3,478,790 | $365.7M | 0.07% | +92,475+2.7% | Added |
| Capital World Investors | 3,817,417 | $401.2M | 0.06% | −298,552−7.3% | Reduced |
| Dimensional Fund Advisors LP | 4,219,263 | $443.5M | 0.11% | +15,097+0.4% | Added |
| Northern Trust Corp | 4,326,476 | $454.8M | 0.06% | +1,554,746+56.1% | Added |
| Geode Capital Management, LLC | 7,912,109 | $832.9M | 0.06% | −345,856−4.2% | Reduced |
| Cohen & Steers, Inc. | 14,907,846 | $1.57B | 2.97% | −2,818,166−15.9% | Reduced |
| State Street Corp | 16,621,783 | $1.76B | 0.07% | +54,006+0.3% | Added |
| BlackRock, Inc. | 32,072,872 | $3.37B | 0.07% | +763,235+2.4% | Added |
| Vanguard Group Inc | 46,605,170 | $4.90B | 0.09% | +1,3320.0% | Added |
| Lord, Abbett & Co. LLC | 0 | $0 | 0.00% | −203,000−100.0% | Sold out |
| Worldquant Millennium Advisors LLC | 0 | $0 | 0.00% | −193,747−100.0% | Sold out |
| Gillson Capital LP | 0 | $0 | 0.00% | −143,400−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −56,039−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −48,997−100.0% | Sold out |
| Wakefield Asset Management LLLP | 0 | $0 | 0.00% | −46,625−100.0% | Sold out |
| Uniplan Investment Counsel, Inc. | 0 | $0 | 0.00% | −44,702−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −32,900−100.0% | Sold out |
| RPg Family Wealth Advisory, LLC | 0 | $0 | 0.00% | −28,826−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −28,542−100.0% | Sold out |
| Three Seasons Wealth, LLC | 0 | $0 | 0.00% | −16,924−100.0% | Sold out |
| Diversified Trust Co | 0 | $0 | 0.00% | −12,168−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −9,152−100.0% | Sold out |
| H&H Retirement Design & Management INC | 0 | $0 | 0.00% | −8,697−100.0% | Sold out |
| Associated Banc-Corp | 0 | $0 | 0.00% | −8,863−100.0% | Sold out |
| Kentucky Retirement Systems Insurance Trust Fund | 0 | $0 | 0.00% | −8,685−100.0% | Sold out |
| Veriti Management LLC | 0 | $0 | 0.00% | −7,987−100.0% | Sold out |
| Fiduciary Family Office, LLC | 0 | $0 | 0.00% | −7,665−100.0% | Sold out |
| Friedenthal Financial | 0 | $0 | 0.00% | −6,931−100.0% | Sold out |
| Quadcap Wealth Management, LLC | 0 | $0 | 0.00% | −6,689−100.0% | Sold out |
| Accuvest Global Advisors | 0 | $0 | 0.00% | −6,473−100.0% | Sold out |
| DCM Advisors, LLC | 0 | $0 | 0.00% | −6,144−100.0% | Sold out |
| Zimmermann Investment Management & Planning LLC | 0 | $0 | 0.00% | −6,075−100.0% | Sold out |
| GTS Securities LLC | 0 | $0 | 0.00% | −5,886−100.0% | Sold out |
| Caldwell Investment Management Ltd. | 0 | $0 | 0.00% | −5,900−100.0% | Sold out |
| ClearAlpha Technologies LP | 0 | $0 | 0.00% | −5,128−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −4,909−100.0% | Sold out |
| Qtron Investments LLC | 0 | $0 | 0.00% | −4,685−100.0% | Sold out |
| True Vision MN LLC | 0 | $0 | 0.00% | −4,546−100.0% | Sold out |
| Jackson Creek Investment Advisors LLC | 0 | $0 | 0.00% | −4,455−100.0% | Sold out |
| Edmp, Inc. | 0 | $0 | 0.00% | −4,387−100.0% | Sold out |
| Householder Group Estate & Retirement Specialist, LLC | 0 | $0 | 0.00% | −3,956−100.0% | Sold out |