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 2025
Institutional positions in Iron Mountain Inc as of Jun 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
- 1,045
- +59 vs. Q1 2025
- Shares held
- 248.8M
- +4.03M (+1.6%) vs. Q1 2025
- Total value
- $25.5B
- +$4.48B (+21.3%) vs. Q1 2025
- New holders
- 121
- 391 more added
- Sold out
- 62
- 356 more reduced
9 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 50,784 | $5.21M | 0.05% | +600+1.2% | Added |
| Werlinich Asset Management, LLC | 51,812 | $5.31M | 2.90% | 00.0% | Unchanged |
| Nia Impact Advisors, LLC | 52,502 | $5.39M | 1.86% | −11,574−18.1% | Reduced |
| Ethic Inc. | 53,664 | $5.49M | 0.10% | −4,614−7.9% | Reduced |
| DnB Asset Management AS | 54,032 | $5.54M | 0.02% | +2,300+4.4% | Added |
| Janus Henderson Group PLC | 54,137 | $5.55M | 0.00% | +4,966+10.1% | Added |
| American Trust Investment Advisors, LLC | 54,220 | $5.56M | 2.81% | −9,294−14.6% | Reduced |
| Prudential PLC | 54,301 | $5.57M | 0.03% | +8,142+17.6% | Added |
| First National Trust Co | 54,706 | $5.61M | 0.21% | −5,494−9.1% | Reduced |
| Congress Wealth Management LLC | 54,950 | $5.64M | 0.05% | +25,391+85.9% | Added |
| Man Group plc | 55,123 | $5.65M | 0.01% | −159,653−74.3% | Reduced |
| Woodstock Corp | 55,378 | $5.68M | 0.52% | +1,950+3.6% | Added |
| Peapack Gladstone Financial Corp | 56,085 | $5.75M | 0.08% | −513−0.9% | Reduced |
| Amalgamated Bank | 57,071 | $5.85M | 0.05% | −3,014−5.0% | Reduced |
| First Trust Advisors LP | 57,703 | $5.92M | 0.00% | −94,007−62.0% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 58,328 | $5.98M | 0.24% | +866+1.5% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 58,995 | $6.05M | 0.03% | +249+0.4% | Added |
| Polar Asset Management Partners Inc. | 59,646 | $6.12M | 0.15% | +3,600+6.4% | Added |
| USS Investment Management Ltd | 59,840 | $6.14M | 0.04% | +138+0.2% | Added |
| Northwestern Mutual Wealth Management Co | 60,230 | $6.18M | 0.00% | +5,458+10.0% | Added |
| Public Sector Pension Investment Board | 60,672 | $6.22M | 0.03% | −17,870−22.8% | Reduced |
| ProShare Advisors LLC | 60,870 | $6.24M | 0.01% | +4,694+8.4% | Added |
| Brevan Howard Capital Management LP | 61,532 | $6.31M | 0.07% | +61,532 | New |
| Nordea Investment Management AB | 63,914 | $6.50M | 0.01% | +800+1.3% | Added |
| Advisors Asset Management, Inc. | 63,511 | $6.51M | 0.12% | +1,193+1.9% | Added |
| Van Eck Associates Corp | 65,104 | $6.68M | 0.01% | +7,215+12.5% | Added |
| The PNC Financial Services Group, Inc. | 65,386 | $6.71M | 0.00% | +6,937+11.9% | Added |
| KBC Group NV | 65,688 | $6.74M | 0.02% | −1,665−2.5% | Reduced |
| Crossmark Global Holdings, Inc. | 65,793 | $6.75M | 0.11% | +3,765+6.1% | Added |
| Thompson Siegel & Walmsley LLC | 66,200 | $6.79M | 0.11% | +66,200 | New |
| Knights of Columbus Asset Advisors LLC | 66,621 | $6.83M | 0.41% | −40,165−37.6% | Reduced |
| Engineers Gate Manager LP | 66,745 | $6.85M | 0.09% | +11,619+21.1% | Added |
| Burney Co | 66,809 | $6.85M | 0.23% | −85,339−56.1% | Reduced |
| Azimuth Capital Investment Management LLC | 68,662 | $7.04M | 0.26% | +33,946+97.8% | Added |
| Candriam Luxembourg S.C.A. | 71,723 | $7.36M | 0.04% | +1,706+2.4% | Added |
| Czech National Bank | 72,119 | $7.40M | 0.06% | +4,652+6.9% | Added |
| Kempen Capital Management N.V. | 73,433 | $7.53M | 0.07% | +2,792+4.0% | Added |
| ASR Vermogensbeheer N.V. | 73,681 | $7.56M | 0.10% | −16,920−18.7% | Reduced |
| Eisler Capital Management Ltd. | 73,981 | $7.58M | 0.26% | −33,739−31.3% | Reduced |
| Varma Mutual Pension Insurance Co | 74,538 | $7.65M | 0.06% | −5,700−7.1% | Reduced |
| Wealthfront Advisers LLC | 75,981 | $7.79M | 0.02% | +200+0.3% | Added |
| Salem Investment Counselors Inc | 77,234 | $7.92M | 0.25% | −310.0% | Reduced |
| New Age Alpha Advisors, LLC | 77,855 | $7.99M | 0.35% | −18,666−19.3% | Reduced |
| B&I Capital AG | 78,655 | $8.07M | 2.74% | +1,995+2.6% | Added |
| MML Investors Services, LLC | 78,764 | $8.08M | 0.02% | −1,998−2.5% | Reduced |
| State of Michigan Retirement System | 80,246 | $8.23M | 0.04% | +600+0.8% | Added |
| Nissay Asset Management Corp | 80,816 | $8.29M | 0.05% | +1,867+2.4% | Added |
| Mercer Global Advisors Inc | 81,270 | $8.34M | 0.02% | −1,323−1.6% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 81,603 | $8.37M | 0.02% | −183,728−69.2% | Reduced |
| Voya Investment Management LLC | 81,650 | $8.37M | 0.01% | −52,716−39.2% | Reduced |
| MetLife Investment Management | 83,519 | $8.57M | 0.05% | −8,349−9.1% | Reduced |
| HRT Financial LP | 83,708 | $8.59M | 0.04% | +83,708 | New |
| Avantax Advisory Services, Inc. | 85,172 | $8.74M | 0.05% | +11,276+15.3% | Added |
| Nisa Investment Advisors, LLC | 84,801 | $8.78M | 0.04% | −24,802−22.6% | Reduced |
| Arizona State Retirement System | 85,855 | $8.81M | 0.05% | +990+1.2% | Added |
| M&T Bank Corp | 86,327 | $8.85M | 0.03% | +1,132+1.3% | Added |
| Foresight Capital Management Advisors, Inc. | 86,716 | $8.89M | 5.17% | −1,469−1.7% | Reduced |
| ExodusPoint Capital Management, LP | 88,047 | $9.03M | 0.11% | −62,657−41.6% | Reduced |
| Quantinno Capital Management LP | 88,511 | $9.08M | 0.04% | +47,801+117.4% | Added |
| Oversea-Chinese Banking CORP Ltd | 88,735 | $9.10M | 0.26% | +7,114+8.7% | Added |
| Kestra Advisory Services, LLC | 88,917 | $9.12M | 0.04% | +917+1.0% | Added |
| Sonora Investment Management Group, LLC | 89,500 | $9.18M | 0.68% | +13,207+17.3% | Added |
| Lansforsakringar Fondforvaltning AB (publ) | 90,253 | $9.26M | 0.05% | −6,222−6.4% | Reduced |
| Janney Montgomery Scott LLC | 90,708 | $9.30M | 0.02% | −222−0.2% | Reduced |
| Forsta Ap-Fonden | 91,000 | $9.33M | 0.06% | −1,800−1.9% | Reduced |
| Public Employees Retirement System of Ohio | 92,597 | $9.50M | 0.03% | +588+0.6% | Added |
| Gotham Asset Management, LLC | 94,828 | $9.73M | 0.06% | +29,144+44.4% | Added |
| Sora Investors LLC | 95,977 | $9.84M | 0.89% | +95,977 | New |
| State of New Jersey Common Pension Fund D | 97,012 | $9.95M | 0.04% | +272+0.3% | Added |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 97,014 | $9.95M | 0.09% | +2,049+2.2% | Added |
| Chicago Capital, LLC | 97,636 | $10.0M | 0.25% | −1,578−1.6% | Reduced |
| Private Advisor Group, LLC | 99,050 | $10.2M | 0.05% | −312−0.3% | Reduced |
| State of Tennessee, Treasury Department | 100,097 | $10.3M | 0.04% | −2,336−2.3% | Reduced |
| AXA S.A. | 101,843 | $10.4M | 0.03% | +75,393+285.0% | Added |
| IFM Investors Pty Ltd | 103,029 | $10.6M | 0.10% | −11,039−9.7% | Reduced |
| KLP Kapitalforvaltning AS | 103,016 | $10.6M | 0.05% | +4,100+4.1% | Added |
| AQR Capital Management LLC | 106,009 | $10.8M | 0.01% | +40,844+62.7% | Added |
| Thrivent Financial for Lutherans | 107,292 | $11.0M | 0.02% | −20,250−15.9% | Reduced |
| Bamco Inc | 107,524 | $11.0M | 0.03% | +107,524 | New |
| Canada Pension Plan Investment Board | 107,956 | $11.1M | 0.01% | −1,387−1.3% | Reduced |
| Weiss Asset Management LP | 108,426 | $11.1M | 0.18% | +108,426 | New |
| Allspring Global Investments Holdings, LLC | 112,148 | $11.2M | 0.02% | +4,508+4.2% | Added |
| HighTower Advisors, LLC | 110,088 | $11.3M | 0.01% | +964+0.9% | Added |
| UniSuper Management Pty Ltd | 112,214 | $11.5M | 0.08% | −1,279−1.1% | Reduced |
| La Banque Postale Asset Management SA | 114,471 | $11.7M | 0.17% | +114,471 | New |
| Creative Planning | 114,587 | $11.8M | 0.01% | +7,924+7.4% | Added |
| CIBC World Markets Corp | 115,626 | $11.9M | 0.08% | −1,851−1.6% | Reduced |
| Employees Retirement System of Texas | 117,324 | $12.0M | 0.10% | −55,000−31.9% | Reduced |
| Pinebridge Investments, L.P. | 117,989 | $12.1M | 0.10% | −24,349−17.1% | Reduced |
| Advisor Group Holdings, Inc. | 119,147 | $12.2M | 0.02% | −2,005−1.7% | Reduced |
| Sargent Investment Group, LLC | 136,751 | $12.3M | 1.66% | +14,804+12.1% | Added |
| Virginia Retirement Systems Et Al | 122,300 | $12.5M | 0.09% | +36,900+43.2% | Added |
| Susquehanna International Group, LLP | 123,770 | $12.7M | 0.02% | +55,956+82.5% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 124,233 | $12.7M | 0.03% | −730−0.6% | Reduced |
| SG Americas Securities, LLC | 125,316 | $12.9M | 0.06% | +65,051+107.9% | Added |
| Colony Group, LLC | 127,848 | $13.1M | 0.03% | −21,689−14.5% | Reduced |
| Mutual Advisors, LLC | 132,456 | $13.2M | 0.33% | +2,013+1.5% | Added |
| Tectonic Advisors LLC | 128,376 | $13.2M | 0.77% | +12,379+10.7% | Added |
| Vert Asset Management LLC | 129,482 | $13.3M | 4.84% | −6,564−4.8% | Reduced |
| Ar Asset Management Inc | 130,600 | $13.4M | 2.98% | 00.0% | Unchanged |