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, Q2 2025
Institutional positions in Iron Mountain Inc as of Jun 30, 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
- 1,045
- +59 vs. Q1 2025
- Shares held
- 248.8M
- +4.03M (+1.6%) vs. Q1 2025
- Total value
- $25.5B
- +$4.48B (+21.3%) vs. Q1 2025
- New holders
- 121
- 391 more added
- Sold out
- 62
- 356 more reduced
9 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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, Q2 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| KCM Investment Advisors LLC | 21,327 | $2.19M | 0.07% | +17+0.1% | Added |
| Gables Capital Management Inc. | 21,542 | $2.21M | 1.04% | −3,200−12.9% | Reduced |
| J.W. Cole Advisors, Inc. | 21,703 | $2.23M | 0.05% | +7,340+51.1% | Added |
| Naviter Wealth, LLC | 22,341 | $2.31M | 0.28% | +1,572+7.6% | Added |
| Fiduciary Trust Co | 22,574 | $2.32M | 0.03% | +1,000+4.6% | Added |
| Jain Global LLC | 22,776 | $2.34M | 0.04% | +22,776 | New |
| Ancora Advisors, LLC | 22,840 | $2.34M | 0.05% | +100+0.4% | Added |
| ING Groep NV | 22,944 | $2.35M | 0.01% | −6,164−21.2% | Reduced |
| Teachers Retirement System of the State of Kentucky | 22,954 | $2.35M | 0.02% | +353+1.6% | Added |
| American Assets Capital Advisers, LLC | 22,969 | $2.36M | 2.37% | −34,224−59.8% | Reduced |
| Tredje AP-fonden | 23,057 | $2.36M | 0.02% | 00.0% | Unchanged |
| Stock Yards Bank & Trust Co | 23,270 | $2.39M | 0.08% | 00.0% | Unchanged |
| Capital Investment Advisors, LLC | 23,379 | $2.40M | 0.04% | −823−3.4% | Reduced |
| Verition Fund Management LLC | 23,455 | $2.41M | 0.01% | −46,116−66.3% | Reduced |
| PFG Investments, LLC | 23,599 | $2.42M | 0.14% | +133+0.6% | Added |
| F/M Investments LLC | 23,606 | $2.42M | 0.09% | +1,200+5.4% | Added |
| GeoWealth Management, LLC | 23,632 | $2.42M | 0.09% | −128−0.5% | Reduced |
| Sippican Capital Advisors | 23,712 | $2.43M | 1.77% | 00.0% | Unchanged |
| Wolverine Asset Management LLC | 24,782 | $2.54M | 0.04% | −2,500−9.2% | Reduced |
| CoreFirst Bank & Trust | 24,834 | $2.55M | 1.44% | −240−1.0% | Reduced |
| TFG Advisers LLC | 25,306 | $2.60M | 0.89% | +68+0.3% | Added |
| Moody National Bank Trust Division | 25,424 | $2.61M | 0.24% | +1,474+6.2% | Added |
| Oregon Public Employees Retirement Fund | 25,469 | $2.61M | 0.05% | +200+0.8% | Added |
| Shelton Capital Management | 25,663 | $2.63M | 0.06% | −15,000−36.9% | Reduced |
| US Bancorp | 25,791 | $2.65M | 0.00% | +1,500+6.2% | Added |
| Fox Run Management, L.L.C. | 25,922 | $2.66M | 0.44% | +25,922 | New |
| Aurora Investment Counsel | 25,938 | $2.66M | 1.40% | +494+1.9% | Added |
| Point72 Asia (Singapore) Pte. Ltd. | 26,307 | $2.70M | 0.48% | +26,307 | New |
| Elo Mutual Pension Insurance Co | 26,933 | $2.76M | 0.06% | −2,991−10.0% | Reduced |
| Independent Advisor Alliance | 27,132 | $2.78M | 0.08% | −543−2.0% | Reduced |
| Oddo BHF Asset Management SAS | 27,570 | $2.83M | 0.11% | −22,116−44.5% | Reduced |
| Public Employees Retirement Association of Colorado | 28,962 | $2.97M | 0.01% | −1,209−4.0% | Reduced |
| Sage Capital Management, LLC | 29,078 | $2.98M | 1.44% | +150+0.5% | Added |
| Tudor Investment Corp Et Al | 29,141 | $2.99M | 0.02% | −20,968−41.8% | Reduced |
| D.A. Davidson & Co. | 29,532 | $3.03M | 0.02% | +316+1.1% | Added |
| B. Metzler seel. Sohn & Co. AG | 29,635 | $3.04M | 0.03% | +8,442+39.8% | Added |
| Mackenzie Financial Corp | 29,808 | $3.06M | 0.00% | +1,471+5.2% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 29,843 | $3.06M | 0.01% | −61−0.2% | Reduced |
| Investor's Fiduciary Advisor Network, LLC | 30,028 | $3.08M | 1.14% | −921−3.0% | Reduced |
| Dumont & Blake Investment Advisors LLC | 30,234 | $3.10M | 0.81% | −130−0.4% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 30,350 | $3.11M | 0.01% | +7,087+30.5% | Added |
| Warren Averett Asset Management, LLC | 30,464 | $3.12M | 0.03% | −694−2.2% | Reduced |
| Norinchukin Bank, The | 30,596 | $3.14M | 0.05% | +1,928+6.7% | Added |
| Erste Asset Management GmbH | 30,816 | $3.15M | 0.03% | +6,316+25.8% | Added |
| OP Asset Management Ltd | 30,773 | $3.16M | 0.05% | +464+1.5% | Added |
| Courier Capital LLC | 30,912 | $3.17M | 0.19% | −697−2.2% | Reduced |
| Woodline Partners LP | 31,839 | $3.27M | 0.02% | +7,097+28.7% | Added |
| Siemens Fonds Invest GmbH | 31,945 | $3.28M | 0.19% | +781+2.5% | Added |
| Nepsis, Inc. | 31,994 | $3.28M | 0.91% | −9,076−22.1% | Reduced |
| Horizon Kinetics Asset Management LLC | 32,455 | $3.33M | 0.04% | 00.0% | Unchanged |
| One Capital Management, LLC | 32,563 | $3.34M | 0.12% | −1,175−3.5% | Reduced |
| Smithfield Trust Co | 32,569 | $3.34M | 0.16% | 00.0% | Unchanged |
| GWM Advisors LLC | 32,646 | $3.35M | 0.02% | +5,250+19.2% | Added |
| Venture Visionary Partners LLC | 32,989 | $3.38M | 0.13% | +371+1.1% | Added |
| Mutual of America Capital Management LLC | 33,833 | $3.47M | 0.04% | −323−0.9% | Reduced |
| Hourglass Capital, LLC | 34,060 | $3.49M | 0.86% | +660+2.0% | Added |
| Vestcor Inc | 34,212 | $3.51M | 0.11% | −46,376−57.5% | Reduced |
| Cyndeo Wealth Partners, LLC | 34,227 | $3.51M | 0.21% | −862−2.5% | Reduced |
| Cerity Partners LLC | 35,292 | $3.62M | 0.01% | +1,222+3.6% | Added |
| Banque Cantonale Vaudoise | 35,293 | $3.62M | 0.15% | +11,478+48.2% | Added |
| Pacitti Group Inc. | 35,247 | $3.64M | 1.58% | +1,048+3.1% | Added |
| Two Sigma Advisers, LP | 36,100 | $3.70M | 0.01% | −26,600−42.4% | Reduced |
| O'Shaughnessy Asset Management, LLC | 36,526 | $3.75M | 0.03% | +8,157+28.8% | Added |
| Pathstone Holdings, LLC | 36,488 | $3.75M | 0.01% | +316+0.9% | Added |
| Trinity Legacy Partners, LLC | 38,466 | $3.78M | 0.92% | −176−0.5% | Reduced |
| Rafferty Asset Management, LLC | 37,390 | $3.84M | 0.01% | +5,361+16.7% | Added |
| Shell Asset Management Co | 37,414 | $3.84M | 0.13% | +7,917+26.8% | Added |
| JustInvest LLC | 37,986 | $3.90M | 0.04% | +12,842+51.1% | Added |
| Steward Partners Investment Advisory, LLC | 38,385 | $3.94M | 0.03% | +353+0.9% | Added |
| Pensionfund DSM Netherlands | 38,500 | $3.95M | 2.66% | 00.0% | Unchanged |
| NEOS Investment Management LLC | 39,060 | $4.01M | 0.05% | +12,969+49.7% | Added |
| Vectors Research Management, LLC | 40,820 | $4.19M | 1.44% | −1,256−3.0% | Reduced |
| CIBC Asset Management Inc | 41,047 | $4.21M | 0.01% | −3,619−8.1% | Reduced |
| Lee Danner & Bass Inc | 41,700 | $4.28M | 0.33% | +5,675+15.8% | Added |
| Holderness Investments Co | 41,828 | $4.29M | 0.92% | −225−0.5% | Reduced |
| Bank of Nova Scotia | 42,189 | $4.33M | 0.01% | −1,240−2.9% | Reduced |
| Truist Financial Corp | 42,242 | $4.33M | 0.01% | −842−2.0% | Reduced |
| WealthTrust Axiom LLC | 42,649 | $4.37M | 1.29% | −2,568−5.7% | Reduced |
| Spirit of America Management Corp | 43,250 | $4.44M | 0.93% | 00.0% | Unchanged |
| New York Life Investment Management LLC | 44,252 | $4.54M | 0.04% | +735+1.7% | Added |
| Police & Firemen's Retirement System of New Jersey | 44,369 | $4.55M | 0.04% | +2,010+4.7% | Added |
| Teacher Retirement System of Texas | 44,608 | $4.58M | 0.02% | −13,216−22.9% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 44,869 | $4.60M | 0.02% | −1,212−2.6% | Reduced |
| Alberta Investment Management Corp | 44,900 | $4.61M | 0.04% | −3,900−8.0% | Reduced |
| Allianz Asset Management GmbH | 45,186 | $4.63M | 0.01% | −10,064−18.2% | Reduced |
| RB Capital Management, LLC | 45,619 | $4.68M | 1.06% | +521+1.2% | Added |
| Mariner, LLC | 45,655 | $4.68M | 0.01% | +4,035+9.7% | Added |
| Xponance, Inc. | 46,167 | $4.74M | 0.04% | −34,447−42.7% | Reduced |
| British Columbia Investment Management Corp | 46,215 | $4.74M | 0.03% | −9,907−17.7% | Reduced |
| Raiffeisen Bank International AG | 46,340 | $4.76M | 0.07% | −2,830−5.8% | Reduced |
| Prevail Innovative Wealth Advisors, LLC | 46,555 | $4.78M | 1.07% | +14,907+47.1% | Added |
| Swiss Life Asset Management Ltd | 46,587 | $4.78M | 0.03% | +1,262+2.8% | Added |
| Federation des caisses Desjardins du Quebec | 46,646 | $4.78M | 0.02% | +4,374+10.3% | Added |
| Utah Retirement Systems | 48,049 | $4.93M | 0.05% | −165−0.3% | Reduced |
| Baird Financial Group, Inc. | 48,670 | $4.99M | 0.01% | −13,640−21.9% | Reduced |
| Yousif Capital Management, LLC | 48,874 | $5.01M | 0.05% | −108−0.2% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 50,250 | $5.06M | 0.01% | +1,164+2.4% | Added |
| Lighthouse Investment Partners, LLC | 50,200 | $5.15M | 0.22% | +47,700+1,908.0% | Added |
| Moors & Cabot, Inc. | 50,274 | $5.16M | 0.24% | −266−0.5% | Reduced |
| Promethos Capital, LLC | 50,782 | $5.21M | 1.76% | 00.0% | Unchanged |