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 |
|---|---|---|---|---|---|
| Aviva PLC | 260,627 | $32.9M | 0.05% | −2,573−1.0% | Reduced |
| Stifel Financial Corp | 259,638 | $32.8M | 0.03% | +4,290+1.7% | Added |
| State Board of Administration of Florida Retirement System | 257,566 | $32.5M | 0.05% | −4,949−1.9% | Reduced |
| Cetera Investment Advisers | 257,097 | $32.5M | 0.03% | −2,942−1.1% | Reduced |
| Federated Hermes, Inc. | 241,777 | $30.5M | 0.04% | +27,651+12.9% | Added |
| Americana Partners, LLC | 241,330 | $30.5M | 0.69% | −2,844−1.2% | Reduced |
| Summit Partners Public Asset Management, LLC | 235,567 | $29.8M | 0.77% | +235,567 | New |
| Retirement Systems of Alabama | 227,483 | $28.7M | 0.09% | −320−0.1% | Reduced |
| Blair William & Co | 224,376 | $28.3M | 0.07% | −873−0.4% | Reduced |
| New York State Teachers Retirement System | 222,876 | $28.2M | 0.05% | −5,000−2.2% | Reduced |
| Korea Investment CORP | 218,594 | $27.6M | 0.05% | +98,547+82.1% | Added |
| CI Private Wealth, LLC | 216,659 | $27.4M | 0.04% | +4,341+2.0% | Added |
| Reaves W H & Co Inc | 212,533 | $26.8M | 0.41% | −1,016−0.5% | Reduced |
| Colony Group, LLC | 211,460 | $26.7M | 0.03% | +3,929+1.9% | Added |
| Captrust Financial Advisors | 207,991 | $26.3M | 0.04% | −3,700−1.7% | Reduced |
| Envestnet Asset Management Inc | 204,397 | $25.8M | 0.01% | −20,450−9.1% | Reduced |
| KLP Kapitalforvaltning AS | 201,716 | $25.6M | 0.08% | +11,800+6.2% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 202,404 | $25.6M | 0.05% | +3,605+1.8% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 196,364 | $24.8M | 0.02% | −55,163−21.9% | Reduced |
| GW&K Investment Management, LLC | 196,280 | $24.8M | 0.19% | +196,036+80,342.6% | Added |
| National Bank of Canada | 191,656 | $24.2M | 0.02% | +96,523+101.5% | Added |
| Handelsbanken Fonder AB | 189,498 | $23.9M | 0.07% | +37,216+24.4% | Added |
| New York State Common Retirement Fund | 182,874 | $23.1M | 0.03% | −1,200−0.7% | Reduced |
| Resona Asset Management Co.,Ltd. | 178,163 | $23.0M | 0.11% | −2,437−1.3% | Reduced |
| APG Asset Management N.V. | 207,010 | $22.9M | 0.06% | +56,094+37.2% | Added |
| State of Alaska, Department of Revenue | 176,638 | $22.3M | 0.22% | −1,071−0.6% | Reduced |
| Natixis Advisors, L.P. | 173,833 | $22.0M | 0.02% | +7,697+4.6% | Added |
| United Capital Financial Advisers, LLC | 172,265 | $21.8M | 0.12% | −3,388−1.9% | Reduced |
| Manufacturers Life Insurance Company, The | 166,497 | $21.0M | 0.02% | −6,973−4.0% | Reduced |
| Thrivent Financial for Lutherans | 165,535 | $20.9M | 0.04% | +59,019+55.4% | Added |
| Pacer Advisors, Inc. | 164,494 | $20.8M | 0.05% | −2,676−1.6% | Reduced |
| Ensign Peak Advisors, Inc | 163,841 | $20.7M | 0.03% | −133,489−44.9% | Reduced |
| Moran Wealth Management, LLC | 163,458 | $20.6M | 0.56% | −9,902−5.7% | Reduced |
| Tectonic Advisors LLC | 162,401 | $20.5M | 0.99% | −3,413−2.1% | Reduced |
| Danske Bank A/S | 160,962 | $20.3M | 0.04% | −3,200−1.9% | Reduced |
| State of Wisconsin Investment Board | 158,437 | $20.0M | 0.04% | −18,083−10.2% | Reduced |
| Commonwealth Equity Services, LLC | 157,856 | $19.9M | 0.03% | +1,194+0.8% | Added |
| Millennium Management LLC | 157,057 | $19.8M | 0.01% | −217,406−58.1% | Reduced |
| Vert Asset Management LLC | 154,450 | $19.5M | 5.34% | +8,044+5.5% | Added |
| Mariner, LLC | 146,985 | $18.6M | 0.02% | +17,966+13.9% | Added |
| Brookstone Capital Management | 146,595 | $18.5M | 0.19% | −42,334−22.4% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 144,894 | $18.3M | 0.02% | +16,859+13.2% | Added |
| FIL Ltd | 144,810 | $18.3M | 0.01% | −5,924−3.9% | Reduced |
| Public Employees Retirement Association of Colorado | 144,551 | $18.3M | 0.06% | +116,215+410.1% | Added |
| Chevy Chase Trust Holdings, Inc. | 143,663 | $18.1M | 0.05% | −2,079−1.4% | Reduced |
| Mitsubishi UFJ Trust & Banking Corp | 141,549 | $17.9M | 0.04% | +24,001+20.4% | Added |
| Franklin Resources Inc | 141,308 | $17.8M | 0.00% | −6,675−4.5% | Reduced |
| Royal London Asset Management Ltd | 141,105 | $17.8M | 0.03% | −1,619−1.1% | Reduced |
| Creative Planning | 139,922 | $17.7M | 0.01% | +8,242+6.3% | Added |
| Trust Co of Virginia | 139,708 | $17.6M | 1.34% | −1,829−1.3% | Reduced |
| Natixis | 138,282 | $17.5M | 0.08% | +130,162+1,603.0% | Added |
| Gillson Capital LP | 137,932 | $17.4M | 1.03% | +137,932 | New |
| Sanctuary Advisors, LLC | 136,968 | $17.3M | 0.08% | −1,155−0.8% | Reduced |
| United Bank | 134,721 | $17.0M | 2.00% | −6,915−4.9% | Reduced |
| Toronto Dominion Bank | 133,884 | $16.9M | 0.03% | +4,351+3.4% | Added |
| Intech Investment Management LLC | 133,015 | $16.8M | 0.15% | +110,747+497.3% | Added |
| Tredje AP-fonden | 132,083 | $16.7M | 0.08% | +12,271+10.2% | Added |
| Sargent Investment Group, LLC | 131,883 | $16.7M | 2.00% | −2,704−2.0% | Reduced |
| Ar Asset Management Inc | 130,600 | $16.5M | 3.02% | 00.0% | Unchanged |
| Mutual Advisors, LLC | 128,782 | $16.3M | 0.31% | −273−0.2% | Reduced |
| Treasurer of the State of North Carolina | 125,912 | $15.9M | 0.04% | +310+0.2% | Added |
| Boothbay Fund Management, LLC | 125,307 | $15.8M | 0.30% | −16,130−11.4% | Reduced |
| Point72 Asset Management, L.P. | 123,262 | $15.6M | 0.02% | −254,356−67.4% | Reduced |
| TCW Group Inc | 120,984 | $15.3M | 0.10% | −14,375−10.6% | Reduced |
| Eurizon Capital SGR S.p.A. | 120,509 | $15.2M | 0.04% | +30,894+34.5% | Added |
| Cambridge Investment Research Advisors, Inc. | 120,176 | $15.2M | 0.03% | −4,024−3.2% | Reduced |
| Storebrand Asset Management AS | 117,204 | $14.8M | 0.04% | −2,359−2.0% | Reduced |
| Omers Administration Corp | 116,430 | $14.7M | 0.09% | +103,068+771.4% | Added |
| IFM Investors Pty Ltd | 113,862 | $14.4M | 0.10% | +8,261+7.8% | Added |
| O'Neil Global Advisors, Inc. | 113,164 | $14.3M | 3.20% | +113,164 | New |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 112,827 | $14.3M | 0.10% | +3,105+2.8% | Added |
| First Trust Advisors LP | 112,189 | $14.2M | 0.01% | +56,495+101.4% | Added |
| Nippon Life Global Investors Americas, Inc. | 111,470 | $14.2M | 0.56% | −1,390−1.2% | Reduced |
| CIBC World Markets Inc. | 112,049 | $14.2M | 0.02% | −56,370−33.5% | Reduced |
| TD Asset Management Inc | 111,713 | $14.1M | 0.01% | −69,570−38.4% | Reduced |
| NEOS Investment Management LLC | 110,692 | $14.0M | 0.05% | +9,630+9.5% | Added |
| D. E. Shaw & Co., Inc. | 109,823 | $13.9M | 0.01% | +109,823 | New |
| Panagora Asset Management Inc | 109,416 | $13.8M | 0.04% | +105,892+3,004.9% | Added |
| Mercer Global Advisors Inc | 106,912 | $13.5M | 0.02% | +14,543+15.7% | Added |
| HighTower Advisors, LLC | 105,399 | $13.3M | 0.01% | −261−0.2% | Reduced |
| Janney Montgomery Scott LLC | 105,090 | $13.3M | 0.03% | +16,734+18.9% | Added |
| Nykredit A/S | 104,462 | $13.2M | 0.05% | +104,462 | New |
| Advisor Group Holdings, Inc. | 102,853 | $13.0M | 0.02% | −7,650−6.9% | Reduced |
| Adams Diversified Equity Fund, Inc. | 102,900 | $13.0M | 0.40% | +22,100+27.4% | Added |
| Kestra Advisory Services, LLC | 100,099 | $12.6M | 0.04% | −1,228−1.2% | Reduced |
| Uniplan Investment Counsel, Inc. | 98,324 | $12.4M | 1.16% | +98,324 | New |
| Ieq Capital, LLC | 97,425 | $12.3M | 0.06% | −4,465−4.4% | Reduced |
| State of Tennessee, Treasury Department | 96,437 | $12.2M | 0.04% | −15,890−14.1% | Reduced |
| State of New Jersey Common Pension Fund D | 96,274 | $12.2M | 0.04% | −3,168−3.2% | Reduced |
| Cerity Partners LLC | 94,727 | $12.0M | 0.01% | +5,217+5.8% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 93,178 | $11.8M | 0.05% | −7,079−7.1% | Reduced |
| Schroder Investment Management Group | 90,524 | $11.4M | 0.01% | +79,548+724.7% | Added |
| KBC Group NV | 86,949 | $11.0M | 0.02% | +6,604+8.2% | Added |
| Nisa Investment Advisors, LLC | 86,069 | $10.9M | 0.03% | −15,376−15.2% | Reduced |
| Van Eck Associates Corp | 86,504 | $10.9M | 0.01% | +2,937+3.5% | Added |
| Nissay Asset Management Corp | 86,438 | $10.9M | 0.05% | +1,699+2.0% | Added |
| Arizona State Retirement System | 85,291 | $10.8M | 0.05% | +4,928+6.1% | Added |
| Public Sector Pension Investment Board | 84,934 | $10.7M | 0.03% | +741+0.9% | Added |
| Czech National Bank | 84,687 | $10.7M | 0.06% | +4,118+5.1% | Added |
| Intrinsic Edge Capital Management LLC | 84,515 | $10.7M | 1.32% | −37,213−30.6% | Reduced |