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, Q3 2025
Institutional positions in Iron Mountain Inc as of Sep 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
- 1,017
- −13 vs. Q2 2025
- Shares held
- 250.3M
- +5.90M (+2.4%) vs. Q2 2025
- Total value
- $25.5B
- +$450.7M (+1.8%) vs. Q2 2025
- New holders
- 75
- 370 more added
- Sold out
- 88
- 390 more reduced
15 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Avanza Fonder AB | 22,699 | $2.31M | 0.06% | +5,774+34.1% | Added |
| Teachers Retirement System of the State of Kentucky | 22,954 | $2.34M | 0.02% | 00.0% | Unchanged |
| Stock Yards Bank & Trust Co | 23,047 | $2.35M | 0.07% | −223−1.0% | Reduced |
| F/M Investments LLC | 23,106 | $2.36M | 0.09% | −500−2.1% | Reduced |
| Naviter Wealth, LLC | 23,005 | $2.36M | 0.28% | +664+3.0% | Added |
| Capital Investment Advisors, LLC | 23,227 | $2.37M | 0.04% | −152−0.7% | Reduced |
| GeoWealth Management, LLC | 23,419 | $2.39M | 0.09% | −213−0.9% | Reduced |
| Sippican Capital Advisors | 23,532 | $2.40M | 1.59% | −180−0.8% | Reduced |
| Wolverine Asset Management LLC | 23,832 | $2.43M | 0.04% | −950−3.8% | Reduced |
| PFG Investments, LLC | 23,916 | $2.44M | 0.13% | +317+1.3% | Added |
| Nepsis, Inc. | 23,942 | $2.44M | 0.77% | −8,052−25.2% | Reduced |
| CoreFirst Bank & Trust | 24,079 | $2.45M | 1.33% | −755−3.0% | Reduced |
| Investor's Fiduciary Advisor Network, LLC | 24,385 | $2.48M | 0.84% | −5,643−18.8% | Reduced |
| American Assets Capital Advisers, LLC | 24,433 | $2.49M | 2.63% | +1,464+6.4% | Added |
| Shelton Capital Management | 25,663 | $2.62M | 0.06% | 00.0% | Unchanged |
| Aurora Investment Counsel | 26,177 | $2.67M | 1.40% | +239+0.9% | Added |
| US Bancorp | 26,210 | $2.67M | 0.00% | +419+1.6% | Added |
| Independent Advisor Alliance | 26,706 | $2.72M | 0.07% | −426−1.6% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 27,117 | $2.76M | 0.01% | −3,233−10.7% | Reduced |
| Verition Fund Management LLC | 27,900 | $2.84M | 0.02% | +4,445+19.0% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 27,941 | $2.85M | 0.00% | −1,902−6.4% | Reduced |
| GWM Advisors LLC | 28,072 | $2.86M | 0.01% | −4,574−14.0% | Reduced |
| Public Employees Retirement Association of Colorado | 28,336 | $2.89M | 0.01% | −626−2.2% | Reduced |
| Sage Capital Management, LLC | 29,205 | $2.98M | 1.34% | +127+0.4% | Added |
| B. Metzler seel. Sohn & Co. AG | 29,635 | $3.02M | 0.03% | 00.0% | Unchanged |
| Knights of Columbus Asset Advisors LLC | 29,802 | $3.04M | 0.17% | −36,819−55.3% | Reduced |
| D.A. Davidson & Co. | 29,870 | $3.05M | 0.02% | +338+1.1% | Added |
| Dumont & Blake Investment Advisors LLC | 29,896 | $3.05M | 0.74% | −338−1.1% | Reduced |
| Elo Mutual Pension Insurance Co | 30,150 | $3.07M | 0.05% | +3,217+11.9% | Added |
| Fieldview Capital Management, LLC | 30,331 | $3.09M | 0.51% | +30,331 | New |
| Courier Capital LLC | 30,671 | $3.13M | 0.18% | −241−0.8% | Reduced |
| Mackenzie Financial Corp | 30,798 | $3.14M | 0.00% | +990+3.3% | Added |
| Norinchukin Bank, The | 31,092 | $3.17M | 0.04% | +496+1.6% | Added |
| Tredje AP-fonden | 31,287 | $3.19M | 0.03% | +8,230+35.7% | Added |
| One Capital Management, LLC | 31,657 | $3.23M | 0.10% | −906−2.8% | Reduced |
| Mutual of America Capital Management LLC | 32,014 | $3.26M | 0.03% | −1,819−5.4% | Reduced |
| Smithfield Trust Co | 32,427 | $3.31M | 0.15% | −142−0.4% | Reduced |
| Banque Cantonale Vaudoise | 32,564 | $3.32M | 0.12% | −2,729−7.7% | Reduced |
| OP Asset Management Ltd | 32,634 | $3.33M | 0.04% | +1,861+6.0% | Added |
| Venture Visionary Partners LLC | 33,180 | $3.38M | 0.12% | +191+0.6% | Added |
| J.W. Cole Advisors, Inc. | 33,596 | $3.42M | 0.07% | +11,893+54.8% | Added |
| Oregon Public Employees Retirement Fund | 33,789 | $3.44M | 0.04% | +8,320+32.7% | Added |
| Hourglass Capital, LLC | 33,860 | $3.45M | 0.78% | −200−0.6% | Reduced |
| Warren Averett Asset Management, LLC | 33,989 | $3.46M | 0.03% | +3,525+11.6% | Added |
| Cyndeo Wealth Partners, LLC | 34,228 | $3.49M | 0.19% | +10.0% | Added |
| Intact Investment Management Inc. | 35,200 | $3.59M | 0.11% | +35,200 | New |
| Pathstone Holdings, LLC | 35,262 | $3.60M | 0.01% | −1,226−3.4% | Reduced |
| American Trust Investment Advisors, LLC | 36,330 | $3.70M | 1.91% | −17,890−33.0% | Reduced |
| Pacitti Group Inc. | 36,746 | $3.77M | 1.46% | +1,499+4.3% | Added |
| O'Shaughnessy Asset Management, LLC | 37,104 | $3.78M | 0.02% | +578+1.6% | Added |
| Janus Henderson Group PLC | 37,444 | $3.82M | 0.00% | −16,693−30.8% | Reduced |
| Cerity Partners LLC | 38,187 | $3.89M | 0.01% | +2,895+8.2% | Added |
| Pensionfund DSM Netherlands | 38,500 | $3.92M | 2.54% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 38,638 | $3.94M | 0.02% | −5,970−13.4% | Reduced |
| Qube Research & Technologies Ltd | 38,654 | $3.94M | 0.01% | −171,316−81.6% | Reduced |
| Spirit of America Management Corp | 38,950 | $3.97M | 0.80% | −4,300−9.9% | Reduced |
| Siemens Fonds Invest GmbH | 38,958 | $3.97M | 0.22% | +7,013+22.0% | Added |
| Woodline Partners LP | 38,958 | $3.97M | 0.02% | +7,119+22.4% | Added |
| Trinity Legacy Partners, LLC | 38,688 | $3.98M | 0.92% | +222+0.6% | Added |
| JustInvest LLC | 39,040 | $3.99M | 0.04% | +1,054+2.8% | Added |
| Rafferty Asset Management, LLC | 39,714 | $4.05M | 0.01% | +2,324+6.2% | Added |
| Steward Partners Investment Advisory, LLC | 40,349 | $4.11M | 0.02% | +1,964+5.1% | Added |
| Natixis | 40,921 | $4.17M | 0.02% | +28,563+231.1% | Added |
| Holderness Investments Co | 41,416 | $4.22M | 0.86% | −412−1.0% | Reduced |
| Vectors Research Management, LLC | 41,587 | $4.24M | 1.34% | +767+1.9% | Added |
| WealthTrust Axiom LLC | 42,358 | $4.32M | 1.16% | −291−0.7% | Reduced |
| British Columbia Investment Management Corp | 42,401 | $4.32M | 0.02% | −3,814−8.3% | Reduced |
| Lee Danner & Bass Inc | 42,583 | $4.34M | 0.32% | +883+2.1% | Added |
| CIBC Asset Management Inc | 42,791 | $4.36M | 0.01% | +1,744+4.2% | Added |
| New York Life Investment Management LLC | 43,174 | $4.40M | 0.04% | −1,078−2.4% | Reduced |
| Allianz Asset Management GmbH | 43,274 | $4.41M | 0.01% | −1,912−4.2% | Reduced |
| Moors & Cabot, Inc. | 44,209 | $4.51M | 0.20% | −6,065−12.1% | Reduced |
| Truist Financial Corp | 44,918 | $4.58M | 0.01% | +2,676+6.3% | Added |
| Federation des caisses Desjardins du Quebec | 45,184 | $4.61M | 0.02% | −1,462−3.1% | Reduced |
| Yousif Capital Management, LLC | 45,857 | $4.67M | 0.05% | −3,017−6.2% | Reduced |
| Xponance, Inc. | 46,184 | $4.71M | 0.04% | +170.0% | Added |
| Baird Financial Group, Inc. | 46,638 | $4.75M | 0.01% | −2,032−4.2% | Reduced |
| RB Capital Management, LLC | 46,739 | $4.76M | 0.99% | +1,120+2.5% | Added |
| Mariner, LLC | 46,954 | $4.79M | 0.01% | +1,299+2.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 47,234 | $4.82M | 0.04% | +2,865+6.5% | Added |
| Utah Retirement Systems | 48,479 | $4.94M | 0.05% | +430+0.9% | Added |
| Ethic Inc. | 48,712 | $4.97M | 0.08% | −4,952−9.2% | Reduced |
| Burney Co | 49,603 | $5.06M | 0.16% | −17,206−25.8% | Reduced |
| Vestcor Inc | 50,559 | $5.15M | 0.15% | +16,347+47.8% | Added |
| Mirae Asset Global Investments Co., Ltd. | 50,782 | $5.18M | 0.02% | +5,913+13.2% | Added |
| Wealth Enhancement Advisory Services, LLC | 49,019 | $5.19M | 0.01% | −1,231−2.4% | Reduced |
| First National Trust Co | 51,239 | $5.22M | 0.18% | −3,467−6.3% | Reduced |
| Werlinich Asset Management, LLC | 51,812 | $5.28M | 2.62% | 00.0% | Unchanged |
| Nia Impact Advisors, LLC | 53,167 | $5.42M | 1.76% | +665+1.3% | Added |
| Korea Investment CORP | 53,549 | $5.46M | 0.01% | −221,921−80.6% | Reduced |
| Raiffeisen Bank International AG | 54,667 | $5.49M | 0.07% | +8,327+18.0% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 54,913 | $5.60M | 0.02% | −4,082−6.9% | Reduced |
| Swiss Life Asset Management Ltd | 55,408 | $5.65M | 0.03% | +8,821+18.9% | Added |
| Amalgamated Bank | 56,098 | $5.72M | 0.04% | −973−1.7% | Reduced |
| DnB Asset Management AS | 56,983 | $5.81M | 0.02% | +2,951+5.5% | Added |
| M&T Bank Corp | 58,861 | $6.00M | 0.02% | −27,466−31.8% | Reduced |
| Candriam Luxembourg S.C.A. | 59,106 | $6.03M | 0.03% | −12,617−17.6% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 59,217 | $6.04M | 0.22% | +889+1.5% | Added |
| Peapack Gladstone Financial Corp | 59,573 | $6.07M | 0.08% | +3,488+6.2% | Added |
| USS Investment Management Ltd | 59,840 | $6.10M | 0.03% | 00.0% | Unchanged |