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 |
|---|---|---|---|---|---|
| Nippon Life Global Investors Americas, Inc. | 111,470 | $14.2M | 0.56% | −1,390−1.2% | Reduced |
| First Trust Advisors LP | 112,189 | $14.2M | 0.01% | +56,495+101.4% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 112,827 | $14.3M | 0.10% | +3,105+2.8% | Added |
| O'Neil Global Advisors, Inc. | 113,164 | $14.3M | 3.20% | +113,164 | New |
| IFM Investors Pty Ltd | 113,862 | $14.4M | 0.10% | +8,261+7.8% | Added |
| Omers Administration Corp | 116,430 | $14.7M | 0.09% | +103,068+771.4% | Added |
| Storebrand Asset Management AS | 117,204 | $14.8M | 0.04% | −2,359−2.0% | Reduced |
| Cambridge Investment Research Advisors, Inc. | 120,176 | $15.2M | 0.03% | −4,024−3.2% | Reduced |
| Eurizon Capital SGR S.p.A. | 120,509 | $15.2M | 0.04% | +30,894+34.5% | Added |
| TCW Group Inc | 120,984 | $15.3M | 0.10% | −14,375−10.6% | Reduced |
| Point72 Asset Management, L.P. | 123,262 | $15.6M | 0.02% | −254,356−67.4% | Reduced |
| Boothbay Fund Management, LLC | 125,307 | $15.8M | 0.30% | −16,130−11.4% | Reduced |
| Treasurer of the State of North Carolina | 125,912 | $15.9M | 0.04% | +310+0.2% | Added |
| Mutual Advisors, LLC | 128,782 | $16.3M | 0.31% | −273−0.2% | Reduced |
| Ar Asset Management Inc | 130,600 | $16.5M | 3.02% | 00.0% | Unchanged |
| Sargent Investment Group, LLC | 131,883 | $16.7M | 2.00% | −2,704−2.0% | Reduced |
| Tredje AP-fonden | 132,083 | $16.7M | 0.08% | +12,271+10.2% | Added |
| Intech Investment Management LLC | 133,015 | $16.8M | 0.15% | +110,747+497.3% | Added |
| Toronto Dominion Bank | 133,884 | $16.9M | 0.03% | +4,351+3.4% | Added |
| United Bank | 134,721 | $17.0M | 2.00% | −6,915−4.9% | Reduced |
| Sanctuary Advisors, LLC | 136,968 | $17.3M | 0.08% | −1,155−0.8% | Reduced |
| Gillson Capital LP | 137,932 | $17.4M | 1.03% | +137,932 | New |
| Natixis | 138,282 | $17.5M | 0.08% | +130,162+1,603.0% | Added |
| Trust Co of Virginia | 139,708 | $17.6M | 1.34% | −1,829−1.3% | Reduced |
| Creative Planning | 139,922 | $17.7M | 0.01% | +8,242+6.3% | Added |
| Royal London Asset Management Ltd | 141,105 | $17.8M | 0.03% | −1,619−1.1% | Reduced |
| Franklin Resources Inc | 141,308 | $17.8M | 0.00% | −6,675−4.5% | Reduced |
| Mitsubishi UFJ Trust & Banking Corp | 141,549 | $17.9M | 0.04% | +24,001+20.4% | Added |
| Chevy Chase Trust Holdings, Inc. | 143,663 | $18.1M | 0.05% | −2,079−1.4% | Reduced |
| Public Employees Retirement Association of Colorado | 144,551 | $18.3M | 0.06% | +116,215+410.1% | Added |
| FIL Ltd | 144,810 | $18.3M | 0.01% | −5,924−3.9% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 144,894 | $18.3M | 0.02% | +16,859+13.2% | Added |
| Brookstone Capital Management | 146,595 | $18.5M | 0.19% | −42,334−22.4% | Reduced |
| Mariner, LLC | 146,985 | $18.6M | 0.02% | +17,966+13.9% | Added |
| Vert Asset Management LLC | 154,450 | $19.5M | 5.34% | +8,044+5.5% | Added |
| Millennium Management LLC | 157,057 | $19.8M | 0.01% | −217,406−58.1% | Reduced |
| Commonwealth Equity Services, LLC | 157,856 | $19.9M | 0.03% | +1,194+0.8% | Added |
| State of Wisconsin Investment Board | 158,437 | $20.0M | 0.04% | −18,083−10.2% | Reduced |
| Danske Bank A/S | 160,962 | $20.3M | 0.04% | −3,200−1.9% | Reduced |
| Tectonic Advisors LLC | 162,401 | $20.5M | 0.99% | −3,413−2.1% | Reduced |
| Moran Wealth Management, LLC | 163,458 | $20.6M | 0.56% | −9,902−5.7% | Reduced |
| Ensign Peak Advisors, Inc | 163,841 | $20.7M | 0.03% | −133,489−44.9% | Reduced |
| Pacer Advisors, Inc. | 164,494 | $20.8M | 0.05% | −2,676−1.6% | Reduced |
| Thrivent Financial for Lutherans | 165,535 | $20.9M | 0.04% | +59,019+55.4% | Added |
| Manufacturers Life Insurance Company, The | 166,497 | $21.0M | 0.02% | −6,973−4.0% | Reduced |
| United Capital Financial Advisers, LLC | 172,265 | $21.8M | 0.12% | −3,388−1.9% | Reduced |
| Natixis Advisors, L.P. | 173,833 | $22.0M | 0.02% | +7,697+4.6% | Added |
| State of Alaska, Department of Revenue | 176,638 | $22.3M | 0.22% | −1,071−0.6% | Reduced |
| APG Asset Management N.V. | 207,010 | $22.9M | 0.06% | +56,094+37.2% | Added |
| Resona Asset Management Co.,Ltd. | 178,163 | $23.0M | 0.11% | −2,437−1.3% | Reduced |
| New York State Common Retirement Fund | 182,874 | $23.1M | 0.03% | −1,200−0.7% | Reduced |
| Handelsbanken Fonder AB | 189,498 | $23.9M | 0.07% | +37,216+24.4% | Added |
| National Bank of Canada | 191,656 | $24.2M | 0.02% | +96,523+101.5% | Added |
| GW&K Investment Management, LLC | 196,280 | $24.8M | 0.19% | +196,036+80,342.6% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 196,364 | $24.8M | 0.02% | −55,163−21.9% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 202,404 | $25.6M | 0.05% | +3,605+1.8% | Added |
| KLP Kapitalforvaltning AS | 201,716 | $25.6M | 0.08% | +11,800+6.2% | Added |
| Envestnet Asset Management Inc | 204,397 | $25.8M | 0.01% | −20,450−9.1% | Reduced |
| Captrust Financial Advisors | 207,991 | $26.3M | 0.04% | −3,700−1.7% | Reduced |
| Colony Group, LLC | 211,460 | $26.7M | 0.03% | +3,929+1.9% | Added |
| Reaves W H & Co Inc | 212,533 | $26.8M | 0.41% | −1,016−0.5% | Reduced |
| CI Private Wealth, LLC | 216,659 | $27.4M | 0.04% | +4,341+2.0% | Added |
| Korea Investment CORP | 218,594 | $27.6M | 0.05% | +98,547+82.1% | Added |
| New York State Teachers Retirement System | 222,876 | $28.2M | 0.05% | −5,000−2.2% | Reduced |
| Blair William & Co | 224,376 | $28.3M | 0.07% | −873−0.4% | Reduced |
| Retirement Systems of Alabama | 227,483 | $28.7M | 0.09% | −320−0.1% | Reduced |
| Summit Partners Public Asset Management, LLC | 235,567 | $29.8M | 0.77% | +235,567 | New |
| Americana Partners, LLC | 241,330 | $30.5M | 0.69% | −2,844−1.2% | Reduced |
| Federated Hermes, Inc. | 241,777 | $30.5M | 0.04% | +27,651+12.9% | Added |
| Cetera Investment Advisers | 257,097 | $32.5M | 0.03% | −2,942−1.1% | Reduced |
| State Board of Administration of Florida Retirement System | 257,566 | $32.5M | 0.05% | −4,949−1.9% | Reduced |
| Stifel Financial Corp | 259,638 | $32.8M | 0.03% | +4,290+1.7% | Added |
| Aviva PLC | 260,627 | $32.9M | 0.05% | −2,573−1.0% | Reduced |
| Apollo Management Holdings, L.P. | 265,539 | $33.5M | 0.47% | 00.0% | Unchanged |
| Victory Capital Management Inc | 268,209 | $33.9M | 0.02% | +30,019+12.6% | Added |
| Border to Coast Pensions Partnership Ltd | 275,000 | $34.7M | 0.51% | −195,000−41.5% | Reduced |
| Macquarie Group Ltd | 275,969 | $34.9M | 0.15% | +5,353+2.0% | Added |
| SG Americas Securities, LLC | 284,584 | $35.9M | 0.02% | +284,584 | New |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 286,428 | $36.2M | 0.18% | +84,112+41.6% | Added |
| Swedbank AB | 287,064 | $36.3M | 0.03% | +26,734+10.3% | Added |
| Neuberger Berman Group LLC | 290,384 | $36.7M | 0.02% | −70,367−19.5% | Reduced |
| Acadian Asset Management LLC | 292,064 | $36.9M | 0.04% | +123,157+72.9% | Added |
| Marble Harbor Investment Counsel, LLC | 295,533 | $37.3M | 3.79% | −4,941−1.6% | Reduced |
| Teacher Retirement System of Texas | 297,427 | $37.6M | 0.10% | −97,274−24.6% | Reduced |
| Robeco Institutional Asset Management B.V. | 297,899 | $37.6M | 0.05% | +283,296+1,940.0% | Added |
| Bamco Inc | 310,721 | $39.2M | 0.06% | −214,549−40.8% | Reduced |
| Adell Harriman & Carpenter Inc | 316,465 | $40.0M | 2.05% | +648+0.2% | Added |
| Adelante Capital Management LLC | 325,641 | $41.1M | 2.70% | −31,293−8.8% | Reduced |
| Citadel Advisors LLC | 343,168 | $43.3M | 0.02% | −31,786−8.5% | Reduced |
| Vanguard Investments Australia, Ltd. | 347,312 | $43.9M | 0.11% | +3,978+1.2% | Added |
| Great West Life Assurance Co | 355,692 | $44.8M | 0.07% | +19,832+5.9% | Added |
| Heitman Real Estate Securities LLC | 357,721 | $45.2M | 2.90% | +98,127+37.8% | Added |
| Rockefeller Capital Management L.P. | 391,620 | $49.5M | 0.08% | +2,480+0.6% | Added |
| Jane Street Group, LLC | 396,541 | $50.1M | 0.03% | −310,900−43.9% | Reduced |
| Voloridge Investment Management, LLC | 412,748 | $52.1M | 0.22% | +412,748 | New |
| Citigroup Inc | 422,524 | $53.4M | 0.02% | +106,890+33.9% | Added |
| Public Employees Retirement System of Ohio | 422,586 | $53.4M | 0.16% | −1,128−0.3% | Reduced |
| California State Teachers Retirement System | 434,529 | $54.9M | 0.05% | +11,658+2.8% | Added |
| Virginia Retirement Systems Et Al | 441,803 | $55.8M | 0.33% | +1,695+0.4% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 443,901 | $56.1M | 0.08% | +229,015+106.6% | Added |