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, Q3 2025
Institutional positions in Iron Mountain Inc as of Sep 30, 2025. 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
- 1,017
- −13 vs. Q2 2025
- Shares held
- 250.3M
- +5.90M (+2.4%) vs. Q2 2025
- Total value
- $25.5B
- +$450.7M (+1.8%) vs. Q2 2025
- New holders
- 75
- 370 more added
- Sold out
- 88
- 390 more reduced
15 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2025: 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, Q3 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Zurcher Kantonalbank (Zurich Cantonalbank) | 203,402 | $20.7M | 0.05% | +4,569+2.3% | Added |
| Moran Wealth Management, LLC | 202,788 | $20.7M | 0.62% | −1,408−0.7% | Reduced |
| CI Private Wealth, LLC | 202,524 | $20.6M | 0.03% | −17,751−8.1% | Reduced |
| Envestnet Asset Management Inc | 201,212 | $20.5M | 0.01% | −2,815−1.4% | Reduced |
| New York State Common Retirement Fund | 182,074 | $18.6M | 0.02% | −26,200−12.6% | Reduced |
| Manufacturers Life Insurance Company, The | 180,438 | $18.4M | 0.02% | −5,596−3.0% | Reduced |
| Resona Asset Management Co.,Ltd. | 179,352 | $18.1M | 0.09% | +12,160+7.3% | Added |
| Toronto Dominion Bank | 177,007 | $18.0M | 0.04% | −1,706−1.0% | Reduced |
| United Capital Financial Advisers, LLC | 176,983 | $18.0M | 0.13% | −5,758−3.2% | Reduced |
| TD Asset Management Inc | 176,330 | $18.0M | 0.01% | −3,658−2.0% | Reduced |
| Commonwealth Equity Services, LLC | 175,828 | $17.9M | 0.02% | −27,960−13.7% | Reduced |
| State of Alaska, Department of Revenue | 175,294 | $17.9M | 0.18% | −1,414−0.8% | Reduced |
| State of Wisconsin Investment Board | 174,846 | $17.8M | 0.04% | −5,820−3.2% | Reduced |
| Allworth Financial LP | 173,168 | $17.7M | 0.08% | +765+0.4% | Added |
| Natixis Advisors, L.P. | 172,952 | $17.6M | 0.03% | −6,911−3.8% | Reduced |
| CIBC World Markets Inc. | 172,450 | $17.6M | 0.04% | +36,859+27.2% | Added |
| United Bank | 167,520 | $17.1M | 2.04% | −13,489−7.5% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 167,173 | $17.0M | 0.09% | −239−0.1% | Reduced |
| Franklin Resources Inc | 163,418 | $16.7M | 0.00% | +14,111+9.5% | Added |
| Handelsbanken Fonder AB | 162,038 | $16.5M | 0.05% | +1,765+1.1% | Added |
| Storebrand Asset Management AS | 152,667 | $15.6M | 0.04% | +1,002+0.7% | Added |
| Nippon Life Global Investors Americas, Inc. | 151,450 | $15.5M | 0.66% | +3,330+2.2% | Added |
| Chevy Chase Trust Holdings, Inc. | 150,731 | $15.4M | 0.04% | −5,109−3.3% | Reduced |
| First Trust Advisors LP | 149,839 | $15.3M | 0.01% | +92,136+159.7% | Added |
| Intrinsic Edge Capital Management LLC | 149,371 | $15.2M | 2.31% | −35,470−19.2% | Reduced |
| Danske Bank A/S | 149,162 | $15.2M | 0.04% | +3,900+2.7% | Added |
| Balyasny Asset Management LLC | 148,929 | $15.2M | 0.03% | −239,268−61.6% | Reduced |
| Tectonic Advisors LLC | 148,375 | $15.1M | 0.83% | +19,999+15.6% | Added |
| Advisor Group Holdings, Inc. | 154,617 | $15.1M | 0.02% | +35,470+29.8% | Added |
| Federated Hermes, Inc. | 146,766 | $15.0M | 0.03% | −16,166−9.9% | Reduced |
| Dana Investment Advisors, Inc. | 145,541 | $14.8M | 0.43% | −3,777−2.5% | Reduced |
| La Banque Postale Asset Management SA | 145,305 | $14.8M | 0.18% | +30,834+26.9% | Added |
| D. E. Shaw & Co., Inc. | 144,039 | $14.7M | 0.01% | −439,938−75.3% | Reduced |
| Royal London Asset Management Ltd | 143,849 | $14.7M | 0.03% | +615+0.4% | Added |
| APG Asset Management N.V. | 164,400 | $14.3M | 0.04% | 00.0% | Unchanged |
| Cambridge Investment Research Advisors, Inc. | 139,491 | $14.2M | 0.04% | −3,965−2.8% | Reduced |
| Trust Co of Virginia | 139,464 | $14.2M | 1.19% | −963−0.7% | Reduced |
| Sargent Investment Group, LLC | 137,404 | $14.0M | 2.00% | +653+0.5% | Added |
| Credit Agricole S A | 134,795 | $13.7M | 0.05% | +134,795 | New |
| Vert Asset Management LLC | 134,581 | $13.7M | 4.61% | +5,099+3.9% | Added |
| Virginia Retirement Systems Et Al | 132,600 | $13.5M | 0.09% | +10,300+8.4% | Added |
| Sanctuary Advisors, LLC | 132,386 | $13.5M | 0.08% | +1,485+1.1% | Added |
| Treasurer of the State of North Carolina | 131,904 | $13.4M | 0.04% | −5,143−3.8% | Reduced |
| Ar Asset Management Inc | 130,600 | $13.3M | 2.81% | 00.0% | Unchanged |
| Colony Group, LLC | 129,596 | $13.2M | 0.02% | +1,748+1.4% | Added |
| Nisa Investment Advisors, LLC | 125,142 | $12.9M | 0.05% | +40,341+47.6% | Added |
| Mutual Advisors, LLC | 122,636 | $12.7M | 0.28% | −9,820−7.4% | Reduced |
| Ensign Peak Advisors, Inc | 122,587 | $12.5M | 0.02% | −86,308−41.3% | Reduced |
| Quantinno Capital Management LP | 120,359 | $12.3M | 0.03% | +31,848+36.0% | Added |
| Creative Planning | 119,053 | $12.1M | 0.01% | +4,466+3.9% | Added |
| Capital Fund Management S.A. | 118,570 | $12.1M | 0.12% | −38,208−24.4% | Reduced |
| CIBC Bancorp USA Inc. | 118,362 | $12.1M | 0.07% | +118,362 | New |
| UniSuper Management Pty Ltd | 118,059 | $12.0M | 0.07% | +5,845+5.2% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 118,028 | $12.0M | 0.03% | −6,205−5.0% | Reduced |
| Thrivent Financial for Lutherans | 115,886 | $11.8M | 0.02% | +8,594+8.0% | Added |
| Waterfront Capital Partners, LLC | 115,286 | $11.8M | 7.69% | −95,187−45.2% | Reduced |
| AXA Investment Managers S.A. | 113,347 | $11.6M | 0.03% | +113,347 | New |
| Allspring Global Investments Holdings, LLC | 111,781 | $11.4M | 0.02% | −367−0.3% | Reduced |
| HighTower Advisors, LLC | 106,744 | $10.9M | 0.01% | −3,344−3.0% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 105,141 | $10.7M | 0.17% | −104,555−49.9% | Reduced |
| Oversea-Chinese Banking CORP Ltd | 103,960 | $10.6M | 0.27% | +15,225+17.2% | Added |
| KLP Kapitalforvaltning AS | 103,016 | $10.6M | 0.04% | 00.0% | Unchanged |
| Kestra Advisory Services, LLC | 103,009 | $10.5M | 0.05% | +14,092+15.8% | Added |
| B&I Capital AG | 102,970 | $10.5M | 3.63% | +24,315+30.9% | Added |
| IFM Investors Pty Ltd | 103,586 | $10.5M | 0.09% | +557+0.5% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 100,378 | $10.2M | 0.08% | +3,364+3.5% | Added |
| State of New Jersey Common Pension Fund D | 100,341 | $10.2M | 0.04% | +3,329+3.4% | Added |
| Sora Investors LLC | 100,319 | $10.2M | 0.95% | +4,342+4.5% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 99,462 | $10.1M | 0.05% | +9,209+10.2% | Added |
| Schonfeld Strategic Advisors LLC | 98,229 | $10.0M | 0.07% | −364,924−78.8% | Reduced |
| Private Advisor Group, LLC | 94,056 | $9.59M | 0.05% | −4,994−5.0% | Reduced |
| Public Employees Retirement System of Ohio | 91,656 | $9.34M | 0.03% | −941−1.0% | Reduced |
| Janney Montgomery Scott LLC | 91,549 | $9.33M | 0.02% | +841+0.9% | Added |
| Arizona State Retirement System | 87,256 | $8.89M | 0.05% | +1,401+1.6% | Added |
| Sonora Investment Management Group, LLC | 87,250 | $8.89M | 0.63% | −2,250−2.5% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 86,699 | $8.84M | 0.02% | +5,096+6.2% | Added |
| Thompson Siegel & Walmsley LLC | 86,400 | $8.81M | 0.14% | +20,200+30.5% | Added |
| Summit Partners Public Asset Management, LLC | 85,000 | $8.66M | 0.28% | +85,000 | New |
| Chicago Capital, LLC | 84,016 | $8.56M | 0.21% | −13,620−13.9% | Reduced |
| Gotham Asset Management, LLC | 83,924 | $8.56M | 0.04% | −10,904−11.5% | Reduced |
| NEOS Investment Management LLC | 82,878 | $8.45M | 0.06% | +43,818+112.2% | Added |
| Bank of Nova Scotia | 82,873 | $8.45M | 0.01% | +40,684+96.4% | Added |
| Foresight Capital Management Advisors, Inc. | 82,051 | $8.36M | 4.70% | −4,665−5.4% | Reduced |
| MetLife Investment Management | 81,512 | $8.31M | 0.04% | −2,007−2.4% | Reduced |
| TCW Group Inc | 81,023 | $8.26M | 0.07% | +81,023 | New |
| Varma Mutual Pension Insurance Co | 80,938 | $8.25M | 0.05% | +6,400+8.6% | Added |
| Nissay Asset Management Corp | 80,683 | $8.22M | 0.05% | −133−0.2% | Reduced |
| Hudson Bay Capital Management LP | 80,657 | $8.22M | 0.05% | +74,549+1,220.5% | Added |
| State of Michigan Retirement System | 79,846 | $8.14M | 0.04% | −400−0.5% | Reduced |
| Prudential PLC | 77,572 | $7.91M | 0.06% | +23,271+42.9% | Added |
| Salem Investment Counselors Inc | 77,236 | $7.87M | 0.23% | +20.0% | Added |
| Czech National Bank | 75,013 | $7.65M | 0.05% | +2,894+4.0% | Added |
| Wealthfront Advisers LLC | 74,201 | $7.56M | 0.02% | −1,780−2.3% | Reduced |
| ASR Vermogensbeheer N.V. | 73,176 | $7.46M | 0.09% | −505−0.7% | Reduced |
| Pinebridge Investments, L.P. | 72,235 | $7.36M | 0.05% | −45,754−38.8% | Reduced |
| Van Eck Associates Corp | 72,147 | $7.36M | 0.01% | +7,043+10.8% | Added |
| New Age Alpha Advisors, LLC | 72,143 | $7.35M | 0.31% | −5,712−7.3% | Reduced |
| Forsta Ap-Fonden | 70,900 | $7.23M | 0.04% | −20,100−22.1% | Reduced |
| Squarepoint Ops LLC | 70,329 | $7.17M | 0.02% | +62,395+786.4% | Added |
| Azimuth Capital Investment Management LLC | 69,326 | $7.07M | 0.25% | +664+1.0% | Added |