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 2021
Institutional positions in Iron Mountain Inc as of Jun 30, 2021. 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
- 687
- +60 vs. Q1 2021
- Shares held
- 229.0M
- +3.86M (+1.7%) vs. Q1 2021
- Total value
- $9.70B
- +$1.37B (+16.4%) vs. Q1 2021
- New holders
- 112
- 253 more added
- Sold out
- 52
- 218 more reduced
3 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2021: 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 2021
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Ziegler Capital Management, LLC | 60,188 | $2.55M | 0.09% | −5,687−8.6% | Reduced |
| Madden Securities Corp | 59,157 | $2.50M | 1.31% | −791−1.3% | Reduced |
| M&T Bank Corp | 58,750 | $2.49M | 0.01% | +3,935+7.2% | Added |
| Russell Investments Group, Ltd. | 57,875 | $2.45M | 0.00% | −11,814−17.0% | Reduced |
| Nissay Asset Management Corp | 55,789 | $2.36M | 0.02% | +101+0.2% | Added |
| Bank of Nova Scotia | 55,617 | $2.35M | 0.00% | +636+1.2% | Added |
| National Asset Management, Inc. | 55,420 | $2.35M | 0.08% | +2,482+4.7% | Added |
| Measured Wealth Private Client Group, LLC | 55,339 | $2.34M | 0.75% | +2,342+4.4% | Added |
| Two Sigma Advisers, LP | 54,900 | $2.32M | 0.01% | −28,300−34.0% | Reduced |
| Utah Retirement Systems | 54,814 | $2.32M | 0.03% | 00.0% | Unchanged |
| SeaBridge Investment Advisors LLC | 54,570 | $2.31M | 0.74% | −125−0.2% | Reduced |
| DuPont Capital Management Corp | 54,159 | $2.29M | 0.05% | +23,967+79.4% | Added |
| Eaton Vance Management | 53,663 | $2.27M | 0.00% | +12,446+30.2% | Added |
| British Columbia Investment Management Corp | 53,352 | $2.26M | 0.01% | +6,089+12.9% | Added |
| Public Sector Pension Investment Board | 52,281 | $2.26M | 0.01% | +22,339+74.6% | Added |
| Pearl River Capital, LLC | 52,956 | $2.24M | 0.62% | +52,956 | New |
| Werlinich Asset Management, LLC | 52,840 | $2.24M | 1.81% | 00.0% | Unchanged |
| Baird Financial Group, Inc. | 52,473 | $2.22M | 0.01% | −1,523−2.8% | Reduced |
| Wealthfront Advisers LLC | 52,060 | $2.20M | 0.01% | +10,354+24.8% | Added |
| MML Investors Services, LLC | 50,894 | $2.15M | 0.02% | −2,032−3.8% | Reduced |
| Vectors Research Management, LLC | 49,785 | $2.11M | 0.54% | +5,535+12.5% | Added |
| HNP Capital LLC | 49,785 | $2.11M | 0.56% | +5,948+13.6% | Added |
| Ensign Peak Advisors, Inc | 48,994 | $2.07M | 0.00% | −34,225−41.1% | Reduced |
| Texas Permanent School Fund | 47,967 | $2.03M | 0.02% | −194−0.4% | Reduced |
| Jane Street Group, LLC | 47,595 | $2.01M | 0.01% | −401,417−89.4% | Reduced |
| Teza Capital Management LLC | 46,801 | $1.98M | 0.32% | +29,047+163.6% | Added |
| Banque Cantonale Vaudoise | 46,584 | $1.97M | 0.09% | +14,300+44.3% | Added |
| Searle & Co. | 45,200 | $1.91M | 0.78% | 00.0% | Unchanged |
| Hartford Investment Management Co | 44,554 | $1.89M | 0.05% | +2,785+6.7% | Added |
| Mackay Shields LLC | 44,522 | $1.88M | 0.02% | −7,812−14.9% | Reduced |
| Horizon Investments, LLC | 44,176 | $1.87M | 0.06% | +33,391+309.6% | Added |
| Pensionfund Sabic | 44,000 | $1.86M | 0.40% | 00.0% | Unchanged |
| AlphaCrest Capital Management LLC | 43,406 | $1.84M | 0.08% | −55,560−56.1% | Reduced |
| Cetera Investment Advisers | 43,146 | $1.83M | 0.03% | +26,413+157.8% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 41,960 | $1.77M | 0.04% | +3,125+8.0% | Added |
| Ingalls & Snyder LLC | 41,518 | $1.76M | 0.08% | −4,450−9.7% | Reduced |
| Sculati Wealth Management, LLC | 41,102 | $1.74M | 0.92% | +375+0.9% | Added |
| IFM Investors Pty Ltd | 41,096 | $1.74M | 0.04% | +7,841+23.6% | Added |
| Griffin Asset Management, Inc. | 40,967 | $1.73M | 0.21% | +113+0.3% | Added |
| CIBC World Markets Inc. | 40,823 | $1.73M | 0.01% | +13,425+49.0% | Added |
| Concorde Asset Management, LLC | 40,405 | $1.71M | 0.96% | −12,252−23.3% | Reduced |
| Virtus ETF Advisers LLC | 40,094 | $1.70M | 0.70% | −5,861−12.8% | Reduced |
| CoreFirst Bank & Trust | 39,880 | $1.69M | 1.15% | +454+1.2% | Added |
| Avenir Corp | 39,130 | $1.66M | 0.13% | 00.0% | Unchanged |
| Schroder Investment Management Group | 39,004 | $1.65M | 0.00% | −110−0.3% | Reduced |
| Public Employees Retirement Association of Colorado | 38,491 | $1.63M | 0.01% | 00.0% | Unchanged |
| Loomis Sayles & Co L P | 38,314 | $1.62M | 0.00% | +38,115+19,153.3% | Added |
| DnB Asset Management AS | 38,259 | $1.62M | 0.01% | +1,842+5.1% | Added |
| Teacher Retirement System of Texas | 37,767 | $1.60M | 0.01% | +5,645+17.6% | Added |
| Mutual of America Capital Management LLC | 37,690 | $1.59M | 0.02% | +363+1.0% | Added |
| Balyasny Asset Management LLC | 37,365 | $1.58M | 0.01% | +37,365 | New |
| AE Wealth Management LLC | 36,978 | $1.56M | 0.01% | +834+2.3% | Added |
| Sippican Capital Advisors | 36,522 | $1.55M | 1.34% | −3,930−9.7% | Reduced |
| Mercer Global Advisors Inc | 36,301 | $1.54M | 0.01% | −2,041−5.3% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 36,175 | $1.53M | 0.02% | +103+0.3% | Added |
| Xponance, Inc. | 36,179 | $1.53M | 0.03% | +6,577+22.2% | Added |
| Pacitti Group Inc. | 35,892 | $1.52M | 0.91% | +1,401+4.1% | Added |
| Shell Asset Management Co | 35,799 | $1.51M | 0.03% | −7,340−17.0% | Reduced |
| KBC Group NV | 35,672 | $1.51M | 0.01% | −47,350−57.0% | Reduced |
| Tudor Investment Corp Et Al | 35,656 | $1.51M | 0.03% | +35,656 | New |
| RB Capital Management, LLC | 35,407 | $1.50M | 0.58% | +2,141+6.4% | Added |
| Bessemer Group Inc | 35,367 | $1.50M | 0.00% | −20−0.1% | Reduced |
| Achmea Investment Management B.V. | 35,348 | $1.50M | 0.05% | +35,348 | New |
| Kavar Capital Partners Group, LLC | 34,298 | $1.45M | 0.35% | −24,130−41.3% | Reduced |
| Ontario Teachers Pension Plan Board | 34,268 | $1.45M | 0.02% | +11,754+52.2% | Added |
| Holderness Investments Co | 33,576 | $1.42M | 0.47% | +1,221+3.8% | Added |
| Alps Advisors Inc | 33,418 | $1.41M | 0.01% | −1,734−4.9% | Reduced |
| Acadian Asset Management LLC | 33,170 | $1.40M | 0.01% | +32,486+4,749.4% | Added |
| RFG Advisory, LLC | 32,916 | $1.39M | 0.12% | −3,642−10.0% | Reduced |
| Ancora Advisors, LLC | 32,417 | $1.37M | 0.04% | −796−2.4% | Reduced |
| Madison Asset Management, LLC | 32,222 | $1.36M | 0.02% | +1,226+4.0% | Added |
| APG Asset Management N.V. | 38,105 | $1.36M | 0.00% | −200−0.5% | Reduced |
| Arkadios Wealth Advisors | 31,073 | $1.31M | 0.16% | −3,280−9.5% | Reduced |
| Dumont & Blake Investment Advisors LLC | 30,981 | $1.31M | 0.37% | +391+1.3% | Added |
| DekaBank Deutsche Girozentrale | 31,113 | $1.31M | 0.00% | −6,976−18.3% | Reduced |
| Teamwork Financial Advisors, LLC | 30,049 | $1.27M | 0.26% | −1,822−5.7% | Reduced |
| Richard P Slaughter Associates Inc | 30,003 | $1.27M | 0.49% | +361+1.2% | Added |
| Monument Capital Management | 29,655 | $1.25M | 0.43% | +4,760+19.1% | Added |
| ING Groep NV | 29,559 | $1.25M | 0.02% | +10,463+54.8% | Added |
| Hudson Portfolio Management LLC | 29,475 | $1.25M | 1.15% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 29,385 | $1.24M | 0.03% | −10,763−26.8% | Reduced |
| Candriam Luxembourg S.C.A. | 29,249 | $1.24M | 0.01% | −3,572−10.9% | Reduced |
| Federated Hermes, Inc. | 29,011 | $1.23M | 0.00% | +99+0.3% | Added |
| Norinchukin Bank, The | 28,982 | $1.23M | 0.02% | +236+0.8% | Added |
| Quadrature Capital Ltd | 28,408 | $1.20M | 0.05% | +20,406+255.0% | Added |
| Cubic Asset Management, LLC | 28,005 | $1.19M | 0.29% | −350−1.2% | Reduced |
| Redwood Investment Management, LLC | 27,711 | $1.17M | 0.19% | +502+1.8% | Added |
| Capital Investment Advisory Services, LLC | 27,381 | $1.16M | 0.15% | −981−3.5% | Reduced |
| Donoghue Forlines LLC | 27,287 | $1.16M | 0.22% | −5,888−17.7% | Reduced |
| Horizon Kinetics Asset Management LLC | 26,658 | $1.13M | 0.02% | 00.0% | Unchanged |
| Thompson Investment Management, Inc. | 26,479 | $1.12M | 0.16% | −135−0.5% | Reduced |
| Cerity Partners LLC | 26,381 | $1.12M | 0.02% | −4,025−13.2% | Reduced |
| Jupiter Asset Management Ltd | 26,322 | $1.11M | 0.01% | +26,322 | New |
| Kinneret Advisory, LLC | 25,708 | $1.10M | 0.13% | 00.0% | Unchanged |
| Eii Capital Management, Inc. | 25,700 | $1.09M | 0.51% | 00.0% | Unchanged |
| Hancock Whitney Corp | 25,627 | $1.08M | 0.03% | +6,159+31.6% | Added |
| Cipher Capital LP | 25,409 | $1.07M | 0.59% | −59,016−69.9% | Reduced |
| Independent Financial Group, LLC | 25,293 | $1.07M | 0.11% | +2,374+10.4% | Added |
| Gables Capital Management Inc. | 25,260 | $1.07M | 0.73% | −14,835−37.0% | Reduced |
| Future Financial Wealth Managment LLC | 25,241 | $1.07M | 1.10% | +33+0.1% | Added |