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 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 |
|---|---|---|---|---|---|
| Utah Retirement Systems | 44,878 | $5.67M | 0.05% | −2,809−5.9% | Reduced |
| Fideuram Asset Management (Ireland) dac | 43,870 | $5.69M | 0.11% | +14,882+51.3% | Added |
| RB Capital Management, LLC | 46,766 | $5.91M | 1.16% | −597−1.3% | Reduced |
| Baird Financial Group, Inc. | 47,658 | $6.02M | 0.01% | +4,951+11.6% | Added |
| Jones Financial Companies LLLP | 45,566 | $6.03M | 0.00% | +1,030+2.3% | Added |
| Ethic Inc. | 49,180 | $6.21M | 0.08% | +3,254+7.1% | Added |
| Mackenzie Financial Corp | 49,443 | $6.25M | 0.01% | +13,851+38.9% | Added |
| Nia Impact Advisors, LLC | 49,661 | $6.27M | 2.60% | −211−0.4% | Reduced |
| JustInvest LLC | 49,684 | $6.28M | 0.05% | +194+0.4% | Added |
| Rakuten Investment Management, Inc. | 48,661 | $6.32M | 0.02% | +4,768+10.9% | Added |
| Kempen Capital Management N.V. | 50,585 | $6.39M | 0.05% | +118+0.2% | Added |
| Gotham Asset Management, LLC | 51,161 | $6.46M | 0.02% | +11,429+28.8% | Added |
| Amalgamated Bank | 51,190 | $6.47M | 0.04% | −2,077−3.9% | Reduced |
| New Age Alpha Advisors, LLC | 51,605 | $6.52M | 0.28% | +180.0% | Added |
| Werlinich Asset Management, LLC | 51,982 | $6.57M | 2.51% | 00.0% | Unchanged |
| Candriam Luxembourg S.C.A. | 52,275 | $6.60M | 0.03% | −1,552−2.9% | Reduced |
| Shelton Capital Management | 52,840 | $6.67M | 0.12% | +52,840 | New |
| Pinebridge Investments LLC | 53,335 | $6.74M | 0.06% | +13,859+35.1% | Added |
| Advisors Asset Management, Inc. | 54,419 | $6.87M | 0.10% | +4,020+8.0% | Added |
| Wealth Enhancement Advisory Services, LLC | 61,836 | $6.88M | 0.01% | +8,425+15.8% | Added |
| Allspring Global Investments Holdings, LLC | 56,671 | $6.91M | 0.01% | +218+0.4% | Added |
| Peapack Gladstone Financial Corp | 55,863 | $7.06M | 0.08% | −1,510−2.6% | Reduced |
| Mirova | 56,000 | $7.07M | 0.26% | −27,040−32.6% | Reduced |
| GWM Advisors LLC | 56,273 | $7.11M | 0.02% | +14,455+34.6% | Added |
| Hennion & Walsh Asset Management, Inc. | 56,304 | $7.11M | 0.20% | +5,258+10.3% | Added |
| ProShare Advisors LLC | 56,341 | $7.12M | 0.01% | +1,793+3.3% | Added |
| Raiffeisen Bank International AG | 54,892 | $7.13M | 0.08% | −32,765−37.4% | Reduced |
| Voya Investment Management LLC | 58,470 | $7.39M | 0.01% | +235+0.4% | Added |
| Foresight Capital Management Advisors, Inc. | 59,644 | $7.53M | 3.66% | −8,645−12.7% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 59,764 | $7.55M | 0.12% | +36,486+156.7% | Added |
| Federation des caisses Desjardins du Quebec | 60,455 | $7.64M | 0.02% | +5,557+10.1% | Added |
| Thompson Siegel & Walmsley LLC | 61,100 | $7.72M | 0.14% | −1,000−1.6% | Reduced |
| Barometer Capital Management Inc. | 61,400 | $7.76M | 2.16% | +61,400 | New |
| Intact Investment Management Inc. | 61,700 | $7.79M | 0.22% | −9,900−13.8% | Reduced |
| Walleye Capital LLC | 62,613 | $7.91M | 0.04% | −57,251−47.8% | Reduced |
| Woodline Partners LP | 64,861 | $8.19M | 0.03% | +7,001+12.1% | Added |
| Vestcor Inc | 64,949 | $8.20M | 0.20% | +439+0.7% | Added |
| Woodstock Corp | 65,102 | $8.22M | 0.68% | −395−0.6% | Reduced |
| PFA Pension, Forsikringsaktieselskab | 65,111 | $8.22M | 0.02% | +1,414+2.2% | Added |
| Oversea-Chinese Banking CORP Ltd | 65,390 | $8.26M | 0.20% | −27,046−29.3% | Reduced |
| Two Sigma Investments, LP | 65,892 | $8.32M | 0.01% | −113,310−63.2% | Reduced |
| Hourglass Capital, LLC | 66,050 | $8.34M | 1.64% | −3,650−5.2% | Reduced |
| Xponance, Inc. | 66,624 | $8.42M | 0.05% | +10,635+19.0% | Added |
| Lee Danner & Bass Inc | 66,834 | $8.44M | 0.49% | −307−0.5% | Reduced |
| Northwestern Mutual Wealth Management Co | 67,203 | $8.49M | 0.00% | +523+0.8% | Added |
| DnB Asset Management AS | 67,481 | $8.52M | 0.02% | −23,752−26.0% | Reduced |
| Varma Mutual Pension Insurance Co | 67,938 | $8.58M | 0.05% | −19,000−21.9% | Reduced |
| PensionDanmark Pensionsforsikringsaktieselskab | 68,465 | $8.65M | 0.07% | +7,438+12.2% | Added |
| Mirae Asset Global Investments Co., Ltd. | 68,777 | $8.69M | 0.02% | +1,477+2.2% | Added |
| The PNC Financial Services Group, Inc. | 68,906 | $8.70M | 0.00% | +337+0.5% | Added |
| Swiss Life Asset Management Ltd | 69,555 | $8.79M | 0.04% | +8,944+14.8% | Added |
| UniSuper Management Pty Ltd | 69,636 | $8.80M | 0.05% | −22,272−24.2% | Reduced |
| Chicago Capital, LLC | 69,881 | $8.83M | 0.21% | −14,070−16.8% | Reduced |
| Wealthfront Advisers LLC | 70,478 | $8.90M | 0.02% | +685+1.0% | Added |
| QRG Capital Management, Inc. | 71,225 | $9.00M | 0.07% | +6,273+9.7% | Added |
| CIBC Asset Management Inc | 71,468 | $9.03M | 0.02% | −512−0.7% | Reduced |
| Allworth Financial LP | 74,559 | $9.42M | 0.04% | −1,787−2.3% | Reduced |
| Nordea Investment Management AB | 75,637 | $9.48M | 0.01% | +2,682+3.7% | Added |
| Private Advisor Group, LLC | 75,127 | $9.49M | 0.04% | −10,182−11.9% | Reduced |
| Azimuth Capital Investment Management LLC | 75,180 | $9.50M | 0.32% | −55−0.1% | Reduced |
| Tudor Investment Corp Et Al | 75,389 | $9.52M | 0.04% | +38,181+102.6% | Added |
| SEB Asset Management AB | 75,873 | $9.58M | 0.04% | +6,643+9.6% | Added |
| State of Michigan Retirement System | 76,146 | $9.62M | 0.04% | −1,100−1.4% | Reduced |
| MetLife Investment Management | 76,417 | $9.65M | 0.04% | −1,036−1.3% | Reduced |
| Credit Agricole S A | 76,947 | $9.72M | 0.02% | −24,079−23.8% | Reduced |
| Salem Investment Counselors Inc | 77,154 | $9.75M | 0.24% | −967−1.2% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 78,284 | $9.89M | 0.04% | +4,930+6.7% | Added |
| Bank of Nova Scotia | 79,661 | $10.1M | 0.02% | −20,163−20.2% | Reduced |
| M&T Bank Corp | 81,760 | $10.3M | 0.03% | −1,010−1.2% | Reduced |
| Andra AP-fonden | 81,952 | $10.4M | 0.12% | +50,400+159.7% | Added |
| MML Investors Services, LLC | 83,001 | $10.5M | 0.02% | +15,257+22.5% | Added |
| USS Investment Management Ltd | 83,255 | $10.5M | 0.04% | +16,511+24.7% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 83,421 | $10.5M | 0.05% | +3,500+4.4% | Added |
| Intrinsic Edge Capital Management LLC | 84,515 | $10.7M | 1.32% | −37,213−30.6% | Reduced |
| Czech National Bank | 84,687 | $10.7M | 0.06% | +4,118+5.1% | Added |
| Public Sector Pension Investment Board | 84,934 | $10.7M | 0.03% | +741+0.9% | Added |
| Arizona State Retirement System | 85,291 | $10.8M | 0.05% | +4,928+6.1% | Added |
| Nissay Asset Management Corp | 86,438 | $10.9M | 0.05% | +1,699+2.0% | Added |
| Van Eck Associates Corp | 86,504 | $10.9M | 0.01% | +2,937+3.5% | Added |
| Nisa Investment Advisors, LLC | 86,069 | $10.9M | 0.03% | −15,376−15.2% | Reduced |
| KBC Group NV | 86,949 | $11.0M | 0.02% | +6,604+8.2% | Added |
| Schroder Investment Management Group | 90,524 | $11.4M | 0.01% | +79,548+724.7% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 93,178 | $11.8M | 0.05% | −7,079−7.1% | Reduced |
| Cerity Partners LLC | 94,727 | $12.0M | 0.01% | +5,217+5.8% | Added |
| State of New Jersey Common Pension Fund D | 96,274 | $12.2M | 0.04% | −3,168−3.2% | Reduced |
| State of Tennessee, Treasury Department | 96,437 | $12.2M | 0.04% | −15,890−14.1% | Reduced |
| Ieq Capital, LLC | 97,425 | $12.3M | 0.06% | −4,465−4.4% | Reduced |
| Uniplan Investment Counsel, Inc. | 98,324 | $12.4M | 1.16% | +98,324 | New |
| Kestra Advisory Services, LLC | 100,099 | $12.6M | 0.04% | −1,228−1.2% | Reduced |
| Adams Diversified Equity Fund, Inc. | 102,900 | $13.0M | 0.40% | +22,100+27.4% | Added |
| Advisor Group Holdings, Inc. | 102,853 | $13.0M | 0.02% | −7,650−6.9% | Reduced |
| Nykredit A/S | 104,462 | $13.2M | 0.05% | +104,462 | New |
| Janney Montgomery Scott LLC | 105,090 | $13.3M | 0.03% | +16,734+18.9% | Added |
| HighTower Advisors, LLC | 105,399 | $13.3M | 0.01% | −261−0.2% | Reduced |
| Mercer Global Advisors Inc | 106,912 | $13.5M | 0.02% | +14,543+15.7% | Added |
| Panagora Asset Management Inc | 109,416 | $13.8M | 0.04% | +105,892+3,004.9% | Added |
| D. E. Shaw & Co., Inc. | 109,823 | $13.9M | 0.01% | +109,823 | New |
| NEOS Investment Management LLC | 110,692 | $14.0M | 0.05% | +9,630+9.5% | Added |
| TD Asset Management Inc | 111,713 | $14.1M | 0.01% | −69,570−38.4% | Reduced |
| CIBC World Markets Inc. | 112,049 | $14.2M | 0.02% | −56,370−33.5% | Reduced |