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, Q2 2026
Institutional positions in Iron Mountain Inc as of Jun 30, 2026. 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
- 1,173
- +93 vs. Q1 2026
- Shares held
- 257.1M
- +3.96M (+1.6%) vs. Q1 2026
- Total value
- $32.4B
- +$6.60B (+25.5%) vs. Q1 2026
- New holders
- 154
- 446 more added
- Sold out
- 61
- 386 more reduced
10 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 83,421 | $10.5M | 0.05% | +3,500+4.4% | Added |
| USS Investment Management Ltd | 83,255 | $10.5M | 0.04% | +16,511+24.7% | Added |
| MML Investors Services, LLC | 83,001 | $10.5M | 0.02% | +15,257+22.5% | Added |
| Andra AP-fonden | 81,952 | $10.4M | 0.12% | +50,400+159.7% | Added |
| M&T Bank Corp | 81,760 | $10.3M | 0.03% | −1,010−1.2% | Reduced |
| Bank of Nova Scotia | 79,661 | $10.1M | 0.02% | −20,163−20.2% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 78,284 | $9.89M | 0.04% | +4,930+6.7% | Added |
| Salem Investment Counselors Inc | 77,154 | $9.75M | 0.24% | −967−1.2% | Reduced |
| Credit Agricole S A | 76,947 | $9.72M | 0.02% | −24,079−23.8% | Reduced |
| MetLife Investment Management | 76,417 | $9.65M | 0.04% | −1,036−1.3% | Reduced |
| State of Michigan Retirement System | 76,146 | $9.62M | 0.04% | −1,100−1.4% | Reduced |
| SEB Asset Management AB | 75,873 | $9.58M | 0.04% | +6,643+9.6% | Added |
| Tudor Investment Corp Et Al | 75,389 | $9.52M | 0.04% | +38,181+102.6% | Added |
| Azimuth Capital Investment Management LLC | 75,180 | $9.50M | 0.32% | −55−0.1% | Reduced |
| Private Advisor Group, LLC | 75,127 | $9.49M | 0.04% | −10,182−11.9% | Reduced |
| Nordea Investment Management AB | 75,637 | $9.48M | 0.01% | +2,682+3.7% | Added |
| Allworth Financial LP | 74,559 | $9.42M | 0.04% | −1,787−2.3% | Reduced |
| CIBC Asset Management Inc | 71,468 | $9.03M | 0.02% | −512−0.7% | Reduced |
| QRG Capital Management, Inc. | 71,225 | $9.00M | 0.07% | +6,273+9.7% | Added |
| Wealthfront Advisers LLC | 70,478 | $8.90M | 0.02% | +685+1.0% | Added |
| Chicago Capital, LLC | 69,881 | $8.83M | 0.21% | −14,070−16.8% | Reduced |
| UniSuper Management Pty Ltd | 69,636 | $8.80M | 0.05% | −22,272−24.2% | Reduced |
| Swiss Life Asset Management Ltd | 69,555 | $8.79M | 0.04% | +8,944+14.8% | Added |
| The PNC Financial Services Group, Inc. | 68,906 | $8.70M | 0.00% | +337+0.5% | Added |
| Mirae Asset Global Investments Co., Ltd. | 68,777 | $8.69M | 0.02% | +1,477+2.2% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 68,465 | $8.65M | 0.07% | +7,438+12.2% | Added |
| Varma Mutual Pension Insurance Co | 67,938 | $8.58M | 0.05% | −19,000−21.9% | Reduced |
| DnB Asset Management AS | 67,481 | $8.52M | 0.02% | −23,752−26.0% | Reduced |
| Northwestern Mutual Wealth Management Co | 67,203 | $8.49M | 0.00% | +523+0.8% | Added |
| Lee Danner & Bass Inc | 66,834 | $8.44M | 0.49% | −307−0.5% | Reduced |
| Xponance, Inc. | 66,624 | $8.42M | 0.05% | +10,635+19.0% | Added |
| Hourglass Capital, LLC | 66,050 | $8.34M | 1.64% | −3,650−5.2% | Reduced |
| Two Sigma Investments, LP | 65,892 | $8.32M | 0.01% | −113,310−63.2% | Reduced |
| Oversea-Chinese Banking CORP Ltd | 65,390 | $8.26M | 0.20% | −27,046−29.3% | Reduced |
| PFA Pension, Forsikringsaktieselskab | 65,111 | $8.22M | 0.02% | +1,414+2.2% | Added |
| Woodstock Corp | 65,102 | $8.22M | 0.68% | −395−0.6% | Reduced |
| Vestcor Inc | 64,949 | $8.20M | 0.20% | +439+0.7% | Added |
| Woodline Partners LP | 64,861 | $8.19M | 0.03% | +7,001+12.1% | Added |
| Walleye Capital LLC | 62,613 | $7.91M | 0.04% | −57,251−47.8% | Reduced |
| Intact Investment Management Inc. | 61,700 | $7.79M | 0.22% | −9,900−13.8% | Reduced |
| Barometer Capital Management Inc. | 61,400 | $7.76M | 2.16% | +61,400 | New |
| Thompson Siegel & Walmsley LLC | 61,100 | $7.72M | 0.14% | −1,000−1.6% | Reduced |
| Federation des caisses Desjardins du Quebec | 60,455 | $7.64M | 0.02% | +5,557+10.1% | Added |
| Susquehanna Portfolio Strategies, LLC | 59,764 | $7.55M | 0.12% | +36,486+156.7% | Added |
| Foresight Capital Management Advisors, Inc. | 59,644 | $7.53M | 3.66% | −8,645−12.7% | Reduced |
| Voya Investment Management LLC | 58,470 | $7.39M | 0.01% | +235+0.4% | Added |
| Raiffeisen Bank International AG | 54,892 | $7.13M | 0.08% | −32,765−37.4% | Reduced |
| ProShare Advisors LLC | 56,341 | $7.12M | 0.01% | +1,793+3.3% | Added |
| Hennion & Walsh Asset Management, Inc. | 56,304 | $7.11M | 0.20% | +5,258+10.3% | Added |
| GWM Advisors LLC | 56,273 | $7.11M | 0.02% | +14,455+34.6% | Added |
| Mirova | 56,000 | $7.07M | 0.26% | −27,040−32.6% | Reduced |
| Peapack Gladstone Financial Corp | 55,863 | $7.06M | 0.08% | −1,510−2.6% | Reduced |
| Allspring Global Investments Holdings, LLC | 56,671 | $6.91M | 0.01% | +218+0.4% | Added |
| Wealth Enhancement Advisory Services, LLC | 61,836 | $6.88M | 0.01% | +8,425+15.8% | Added |
| Advisors Asset Management, Inc. | 54,419 | $6.87M | 0.10% | +4,020+8.0% | Added |
| Pinebridge Investments LLC | 53,335 | $6.74M | 0.06% | +13,859+35.1% | Added |
| Shelton Capital Management | 52,840 | $6.67M | 0.12% | +52,840 | New |
| Candriam Luxembourg S.C.A. | 52,275 | $6.60M | 0.03% | −1,552−2.9% | Reduced |
| Werlinich Asset Management, LLC | 51,982 | $6.57M | 2.51% | 00.0% | Unchanged |
| New Age Alpha Advisors, LLC | 51,605 | $6.52M | 0.28% | +180.0% | Added |
| Amalgamated Bank | 51,190 | $6.47M | 0.04% | −2,077−3.9% | Reduced |
| Gotham Asset Management, LLC | 51,161 | $6.46M | 0.02% | +11,429+28.8% | Added |
| Kempen Capital Management N.V. | 50,585 | $6.39M | 0.05% | +118+0.2% | Added |
| Rakuten Investment Management, Inc. | 48,661 | $6.32M | 0.02% | +4,768+10.9% | Added |
| JustInvest LLC | 49,684 | $6.28M | 0.05% | +194+0.4% | Added |
| Nia Impact Advisors, LLC | 49,661 | $6.27M | 2.60% | −211−0.4% | Reduced |
| Mackenzie Financial Corp | 49,443 | $6.25M | 0.01% | +13,851+38.9% | Added |
| Ethic Inc. | 49,180 | $6.21M | 0.08% | +3,254+7.1% | Added |
| Jones Financial Companies LLLP | 45,566 | $6.03M | 0.00% | +1,030+2.3% | Added |
| Baird Financial Group, Inc. | 47,658 | $6.02M | 0.01% | +4,951+11.6% | Added |
| RB Capital Management, LLC | 46,766 | $5.91M | 1.16% | −597−1.3% | Reduced |
| Fideuram Asset Management (Ireland) dac | 43,870 | $5.69M | 0.11% | +14,882+51.3% | Added |
| Utah Retirement Systems | 44,878 | $5.67M | 0.05% | −2,809−5.9% | Reduced |
| British Columbia Investment Management Corp | 44,611 | $5.63M | 0.04% | +3,872+9.5% | Added |
| New York Life Investment Management LLC | 44,375 | $5.61M | 0.04% | +182+0.4% | Added |
| Police & Firemen's Retirement System of New Jersey | 44,283 | $5.59M | 0.04% | −845−1.9% | Reduced |
| Pacitti Group Inc. | 42,611 | $5.41M | 1.71% | +3,378+8.6% | Added |
| Steward Partners Investment Advisory, LLC | 42,548 | $5.37M | 0.03% | −2,237−5.0% | Reduced |
| Pensionfund DSM Netherlands | 42,500 | $5.37M | 2.76% | 00.0% | Unchanged |
| Cinctive Capital Management LP | 42,348 | $5.35M | 0.21% | +42,348 | New |
| Moors & Cabot, Inc. | 41,490 | $5.24M | 0.20% | +213+0.5% | Added |
| HRT Financial LP | 41,293 | $5.21M | 0.01% | −87,045−67.8% | Reduced |
| Holderness Investments Co | 40,621 | $5.13M | 0.86% | +282+0.7% | Added |
| First National Trust Co | 39,708 | $5.02M | 0.17% | −10,910−21.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 39,438 | $4.98M | 0.03% | −209,448−84.2% | Reduced |
| WealthTrust Axiom LLC | 39,223 | $4.95M | 1.11% | −161−0.4% | Reduced |
| D.A. Davidson & Co. | 38,708 | $4.89M | 0.03% | +227+0.6% | Added |
| Spirit of America Management Corp | 38,650 | $4.88M | 0.92% | +200+0.5% | Added |
| Pathstone Holdings, LLC | 38,410 | $4.87M | 0.01% | +2,201+6.1% | Added |
| Yousif Capital Management, LLC | 38,277 | $4.83M | 0.05% | −1,637−4.1% | Reduced |
| Warren Averett Asset Management, LLC | 37,733 | $4.77M | 0.03% | +1,715+4.8% | Added |
| Toroso Investments, LLC | 37,168 | $4.69M | 0.01% | +12,905+53.2% | Added |
| Rafferty Asset Management, LLC | 37,029 | $4.68M | 0.01% | +7,921+27.2% | Added |
| Oregon Public Employees Retirement Fund | 36,589 | $4.62M | 0.05% | +2,700+8.0% | Added |
| ING Groep NV | 36,581 | $4.62M | 0.02% | +305+0.8% | Added |
| O'Shaughnessy Asset Management, LLC | 35,776 | $4.52M | 0.02% | −9,823−21.5% | Reduced |
| American Trust Investment Advisors, LLC | 34,838 | $4.40M | 2.17% | −2,308−6.2% | Reduced |
| Trinity Legacy Partners, LLC | 36,011 | $4.38M | 0.88% | −2,853−7.3% | Reduced |
| Venture Visionary Partners LLC | 34,434 | $4.35M | 0.12% | −7,739−18.4% | Reduced |
| B. Metzler seel. Sohn & Co. AG | 34,219 | $4.32M | 0.04% | +6,407+23.0% | Added |