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, Q1 2025
Institutional positions in Iron Mountain Inc as of Mar 31, 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
- 995
- −56 vs. Q4 2024
- Shares held
- 245.2M
- +10.9M (+4.6%) vs. Q4 2024
- Total value
- $21.1B
- −$3.56B (−14.4%) vs. Q4 2024
- New holders
- 88
- 348 more added
- Sold out
- 144
- 401 more reduced
16 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2024: 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, Q1 2025
Shares, value and share of portfolio for each institution holding Iron Mountain Inc; share changes are against Q4 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Hourglass Capital, LLC | 33,400 | $2.87M | 0.75% | −30−0.1% | Reduced |
| Lido Advisors, LLC | 33,259 | $2.89M | 0.02% | +6,971+26.5% | Added |
| One Capital Management, LLC | 33,738 | $2.90M | 0.10% | −16,656−33.1% | Reduced |
| Cerity Partners LLC | 34,070 | $2.93M | 0.01% | +1,234+3.8% | Added |
| Mutual of America Capital Management LLC | 34,156 | $2.94M | 0.03% | −998−2.8% | Reduced |
| Pacitti Group Inc. | 34,199 | $2.96M | 1.40% | +1,136+3.4% | Added |
| Azimuth Capital Investment Management LLC | 34,716 | $2.99M | 0.12% | +1,346+4.0% | Added |
| Cyndeo Wealth Partners, LLC | 35,089 | $3.02M | 0.20% | +30.0% | Added |
| Lee Danner & Bass Inc | 36,025 | $3.10M | 0.25% | +1,575+4.6% | Added |
| FORA Capital, LLC | 36,263 | $3.12M | 0.32% | −12,563−25.7% | Reduced |
| Pathstone Holdings, LLC | 36,172 | $3.12M | 0.01% | +1,739+5.1% | Added |
| Steward Partners Investment Advisory, LLC | 38,032 | $3.27M | 0.03% | +513+1.4% | Added |
| Pensionfund DSM Netherlands | 38,500 | $3.31M | 2.19% | −4,000−9.4% | Reduced |
| Neuberger Berman Group LLC | 39,516 | $3.40M | 0.00% | −475,718−92.3% | Reduced |
| Centiva Capital, LP | 39,782 | $3.42M | 0.20% | +7,071+21.6% | Added |
| Shelton Capital Management | 40,663 | $3.50M | 0.08% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 40,710 | $3.50M | 0.02% | +19,575+92.6% | Added |
| Nepsis, Inc. | 41,070 | $3.53M | 0.87% | −7,244−15.0% | Reduced |
| Mariner, LLC | 41,620 | $3.58M | 0.01% | −8,214−16.5% | Reduced |
| Holderness Investments Co | 42,053 | $3.62M | 0.84% | −44−0.1% | Reduced |
| Vectors Research Management, LLC | 42,076 | $3.62M | 1.27% | +3,623+9.4% | Added |
| Federation des caisses Desjardins du Quebec | 42,272 | $3.64M | 0.02% | +7,862+22.8% | Added |
| Police & Firemen's Retirement System of New Jersey | 42,359 | $3.64M | 0.04% | 00.0% | Unchanged |
| Truist Financial Corp | 43,084 | $3.71M | 0.01% | −1,667−3.7% | Reduced |
| Spirit of America Management Corp | 43,250 | $3.72M | 0.75% | +1,900+4.6% | Added |
| Bank of Nova Scotia | 43,429 | $3.74M | 0.01% | −4,204−8.8% | Reduced |
| New York Life Investment Management LLC | 43,517 | $3.74M | 0.04% | −274−0.6% | Reduced |
| Trinity Legacy Partners, LLC | 38,642 | $3.76M | 0.95% | −5,827−13.1% | Reduced |
| CIBC Asset Management Inc | 44,666 | $3.84M | 0.01% | −286−0.6% | Reduced |
| RB Capital Management, LLC | 45,098 | $3.88M | 0.94% | −1,242−2.7% | Reduced |
| WealthTrust Axiom LLC | 45,217 | $3.89M | 1.18% | −1,062−2.3% | Reduced |
| Swiss Life Asset Management Ltd | 45,325 | $3.90M | 0.03% | +7,304+19.2% | Added |
| Mirae Asset Global Investments Co., Ltd. | 46,081 | $3.92M | 0.02% | −53−0.1% | Reduced |
| Prudential PLC | 46,159 | $3.97M | 0.02% | −17,532−27.5% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 47,980 | $4.13M | 0.28% | +20,376+73.8% | Added |
| Utah Retirement Systems | 48,214 | $4.15M | 0.05% | 00.0% | Unchanged |
| Janus Henderson Group PLC | 49,171 | $4.18M | 0.00% | +11,814+31.6% | Added |
| Raiffeisen Bank International AG | 49,170 | $4.18M | 0.07% | +11,027+28.9% | Added |
| Alberta Investment Management Corp | 48,800 | $4.20M | 0.03% | +24,400+100.0% | Added |
| Yousif Capital Management, LLC | 48,982 | $4.21M | 0.05% | −370−0.7% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 49,086 | $4.22M | 0.01% | −2,788−5.4% | Reduced |
| Oddo BHF Asset Management SAS | 49,686 | $4.27M | 0.18% | −52,080−51.2% | Reduced |
| Jane Street Group, LLC | 49,774 | $4.28M | 0.01% | +29,808+149.3% | Added |
| Tudor Investment Corp Et Al | 50,109 | $4.31M | 0.04% | +50,109 | New |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 50,184 | $4.32M | 0.05% | −2,900−5.5% | Reduced |
| Moors & Cabot, Inc. | 50,540 | $4.35M | 0.22% | −14,495−22.3% | Reduced |
| Promethos Capital, LLC | 50,782 | $4.37M | 1.60% | −1,340−2.6% | Reduced |
| Oliver Luxxe Assets LLC | 51,469 | $4.43M | 0.82% | 00.0% | Unchanged |
| DnB Asset Management AS | 51,732 | $4.45M | 0.02% | −853−1.6% | Reduced |
| Werlinich Asset Management, LLC | 51,812 | $4.46M | 2.83% | +125+0.2% | Added |
| Woodstock Corp | 53,428 | $4.60M | 0.45% | −11,218−17.4% | Reduced |
| Northwestern Mutual Wealth Management Co | 54,772 | $4.71M | 0.00% | +1,691+3.2% | Added |
| Engineers Gate Manager LP | 55,126 | $4.74M | 0.08% | +18,139+49.0% | Added |
| Allianz Asset Management GmbH | 55,250 | $4.75M | 0.01% | +6,197+12.6% | Added |
| Polar Asset Management Partners Inc. | 56,046 | $4.82M | 0.16% | −85,454−60.4% | Reduced |
| British Columbia Investment Management Corp | 56,122 | $4.83M | 0.03% | −51−0.1% | Reduced |
| ProShare Advisors LLC | 56,176 | $4.83M | 0.01% | +2,747+5.1% | Added |
| Peapack Gladstone Financial Corp | 56,598 | $4.87M | 0.07% | −1,938−3.3% | Reduced |
| American Assets Capital Advisers, LLC | 57,193 | $4.92M | 2.06% | +52,200+1,045.5% | Added |
| Hennion & Walsh Asset Management, Inc. | 57,462 | $4.94M | 0.22% | −12,383−17.7% | Reduced |
| Teacher Retirement System of Texas | 57,824 | $4.98M | 0.02% | +21,775+60.4% | Added |
| Van Eck Associates Corp | 57,889 | $4.98M | 0.01% | +2,318+4.2% | Added |
| The PNC Financial Services Group, Inc. | 58,449 | $5.03M | 0.00% | +1,255+2.2% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 58,746 | $5.05M | 0.02% | −1,100−1.8% | Reduced |
| Ethic Inc. | 58,278 | $5.06M | 0.10% | −2,304−3.8% | Reduced |
| Nippon Life Global Investors Americas, Inc. | 58,610 | $5.08M | 0.25% | −58,390−49.9% | Reduced |
| USS Investment Management Ltd | 59,702 | $5.14M | 0.04% | 00.0% | Unchanged |
| Amalgamated Bank | 60,085 | $5.17M | 0.04% | +1,571+2.7% | Added |
| First National Trust Co | 60,200 | $5.18M | 0.21% | −4,579−7.1% | Reduced |
| SG Americas Securities, LLC | 60,265 | $5.18M | 0.02% | +55,309+1,116.0% | Added |
| Crossmark Global Holdings, Inc. | 62,028 | $5.34M | 0.09% | +4,422+7.7% | Added |
| Baird Financial Group, Inc. | 62,310 | $5.36M | 0.01% | −3,196−4.9% | Reduced |
| Advisors Asset Management, Inc. | 62,318 | $5.36M | 0.10% | −3,442−5.2% | Reduced |
| Two Sigma Advisers, LP | 62,700 | $5.39M | 0.01% | +55,000+714.3% | Added |
| Nordea Investment Management AB | 63,114 | $5.39M | 0.01% | +35,153+125.7% | Added |
| American Trust Investment Advisors, LLC | 63,514 | $5.46M | 2.29% | −4,310−6.4% | Reduced |
| Nia Impact Advisors, LLC | 64,076 | $5.51M | 2.05% | −5,157−7.4% | Reduced |
| AQR Capital Management LLC | 65,165 | $5.53M | 0.01% | −138,699−68.0% | Reduced |
| Allworth Financial LP | 65,378 | $5.58M | 0.03% | +1,028+1.6% | Added |
| Gotham Asset Management, LLC | 65,684 | $5.65M | 0.05% | −20,873−24.1% | Reduced |
| Squarepoint Ops LLC | 65,714 | $5.65M | 0.01% | +30,666+87.5% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 66,002 | $5.68M | 0.01% | +3,502+5.6% | Added |
| KBC Group NV | 67,353 | $5.79M | 0.02% | −334,908−83.3% | Reduced |
| Czech National Bank | 67,467 | $5.80M | 0.05% | +3,839+6.0% | Added |
| Susquehanna International Group, LLP | 67,814 | $5.83M | 0.01% | −101,292−59.9% | Reduced |
| Verition Fund Management LLC | 69,571 | $5.99M | 0.03% | +25,630+58.3% | Added |
| Candriam Luxembourg S.C.A. | 70,017 | $6.02M | 0.04% | −7,080−9.2% | Reduced |
| Kempen Capital Management N.V. | 70,641 | $6.08M | 0.06% | +70,641 | New |
| Corebridge Financial, Inc. | 73,436 | $6.32M | 0.04% | −2,831−3.7% | Reduced |
| Avantax Advisory Services, Inc. | 73,896 | $6.36M | 0.04% | +2,273+3.2% | Added |
| Nomura Holdings Inc | 74,514 | $6.41M | 0.03% | +30,780+70.4% | Added |
| Bowen Hanes & Co Inc | 75,000 | $6.45M | 0.18% | +75,000 | New |
| Wealthfront Advisers LLC | 75,781 | $6.52M | 0.02% | +3,385+4.7% | Added |
| Sonora Investment Management Group, LLC | 76,293 | $6.56M | 0.52% | −1,875−2.4% | Reduced |
| B&I Capital AG | 76,660 | $6.60M | 2.14% | +76,660 | New |
| Banco Santander, S.A. | 77,016 | $6.63M | 0.07% | +77,016 | New |
| Salem Investment Counselors Inc | 77,265 | $6.65M | 0.23% | −1,339−1.7% | Reduced |
| Edgestream Partners, L.P. | 77,599 | $6.68M | 0.23% | −4,049−5.0% | Reduced |
| Public Sector Pension Investment Board | 78,542 | $6.76M | 0.03% | −146,639−65.1% | Reduced |
| Nissay Asset Management Corp | 78,949 | $6.79M | 0.04% | +1,241+1.6% | Added |