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 |
|---|---|---|---|---|---|
| B&I Capital AG | 76,660 | $6.60M | 2.14% | +76,660 | New |
| Sonora Investment Management Group, LLC | 76,293 | $6.56M | 0.52% | −1,875−2.4% | Reduced |
| Wealthfront Advisers LLC | 75,781 | $6.52M | 0.02% | +3,385+4.7% | Added |
| Bowen Hanes & Co Inc | 75,000 | $6.45M | 0.18% | +75,000 | New |
| Nomura Holdings Inc | 74,514 | $6.41M | 0.03% | +30,780+70.4% | Added |
| Avantax Advisory Services, Inc. | 73,896 | $6.36M | 0.04% | +2,273+3.2% | Added |
| Corebridge Financial, Inc. | 73,436 | $6.32M | 0.04% | −2,831−3.7% | Reduced |
| Kempen Capital Management N.V. | 70,641 | $6.08M | 0.06% | +70,641 | New |
| Candriam Luxembourg S.C.A. | 70,017 | $6.02M | 0.04% | −7,080−9.2% | Reduced |
| Verition Fund Management LLC | 69,571 | $5.99M | 0.03% | +25,630+58.3% | Added |
| Susquehanna International Group, LLP | 67,814 | $5.83M | 0.01% | −101,292−59.9% | Reduced |
| Czech National Bank | 67,467 | $5.80M | 0.05% | +3,839+6.0% | Added |
| KBC Group NV | 67,353 | $5.79M | 0.02% | −334,908−83.3% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 66,002 | $5.68M | 0.01% | +3,502+5.6% | Added |
| Squarepoint Ops LLC | 65,714 | $5.65M | 0.01% | +30,666+87.5% | Added |
| Gotham Asset Management, LLC | 65,684 | $5.65M | 0.05% | −20,873−24.1% | Reduced |
| Allworth Financial LP | 65,378 | $5.58M | 0.03% | +1,028+1.6% | Added |
| AQR Capital Management LLC | 65,165 | $5.53M | 0.01% | −138,699−68.0% | Reduced |
| Nia Impact Advisors, LLC | 64,076 | $5.51M | 2.05% | −5,157−7.4% | Reduced |
| American Trust Investment Advisors, LLC | 63,514 | $5.46M | 2.29% | −4,310−6.4% | Reduced |
| Nordea Investment Management AB | 63,114 | $5.39M | 0.01% | +35,153+125.7% | Added |
| Two Sigma Advisers, LP | 62,700 | $5.39M | 0.01% | +55,000+714.3% | Added |
| Advisors Asset Management, Inc. | 62,318 | $5.36M | 0.10% | −3,442−5.2% | Reduced |
| Baird Financial Group, Inc. | 62,310 | $5.36M | 0.01% | −3,196−4.9% | Reduced |
| Crossmark Global Holdings, Inc. | 62,028 | $5.34M | 0.09% | +4,422+7.7% | Added |
| SG Americas Securities, LLC | 60,265 | $5.18M | 0.02% | +55,309+1,116.0% | Added |
| First National Trust Co | 60,200 | $5.18M | 0.21% | −4,579−7.1% | Reduced |
| Amalgamated Bank | 60,085 | $5.17M | 0.04% | +1,571+2.7% | Added |
| USS Investment Management Ltd | 59,702 | $5.14M | 0.04% | 00.0% | Unchanged |
| Nippon Life Global Investors Americas, Inc. | 58,610 | $5.08M | 0.25% | −58,390−49.9% | Reduced |
| Ethic Inc. | 58,278 | $5.06M | 0.10% | −2,304−3.8% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 58,746 | $5.05M | 0.02% | −1,100−1.8% | Reduced |
| The PNC Financial Services Group, Inc. | 58,449 | $5.03M | 0.00% | +1,255+2.2% | Added |
| Van Eck Associates Corp | 57,889 | $4.98M | 0.01% | +2,318+4.2% | Added |
| Teacher Retirement System of Texas | 57,824 | $4.98M | 0.02% | +21,775+60.4% | Added |
| Hennion & Walsh Asset Management, Inc. | 57,462 | $4.94M | 0.22% | −12,383−17.7% | Reduced |
| American Assets Capital Advisers, LLC | 57,193 | $4.92M | 2.06% | +52,200+1,045.5% | Added |
| Peapack Gladstone Financial Corp | 56,598 | $4.87M | 0.07% | −1,938−3.3% | Reduced |
| ProShare Advisors LLC | 56,176 | $4.83M | 0.01% | +2,747+5.1% | Added |
| British Columbia Investment Management Corp | 56,122 | $4.83M | 0.03% | −51−0.1% | Reduced |
| Polar Asset Management Partners Inc. | 56,046 | $4.82M | 0.16% | −85,454−60.4% | Reduced |
| Allianz Asset Management GmbH | 55,250 | $4.75M | 0.01% | +6,197+12.6% | Added |
| Engineers Gate Manager LP | 55,126 | $4.74M | 0.08% | +18,139+49.0% | Added |
| Northwestern Mutual Wealth Management Co | 54,772 | $4.71M | 0.00% | +1,691+3.2% | Added |
| Woodstock Corp | 53,428 | $4.60M | 0.45% | −11,218−17.4% | Reduced |
| Werlinich Asset Management, LLC | 51,812 | $4.46M | 2.83% | +125+0.2% | Added |
| DnB Asset Management AS | 51,732 | $4.45M | 0.02% | −853−1.6% | Reduced |
| Oliver Luxxe Assets LLC | 51,469 | $4.43M | 0.82% | 00.0% | Unchanged |
| Promethos Capital, LLC | 50,782 | $4.37M | 1.60% | −1,340−2.6% | Reduced |
| Moors & Cabot, Inc. | 50,540 | $4.35M | 0.22% | −14,495−22.3% | Reduced |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 50,184 | $4.32M | 0.05% | −2,900−5.5% | Reduced |
| Tudor Investment Corp Et Al | 50,109 | $4.31M | 0.04% | +50,109 | New |
| Jane Street Group, LLC | 49,774 | $4.28M | 0.01% | +29,808+149.3% | Added |
| Oddo BHF Asset Management SAS | 49,686 | $4.27M | 0.18% | −52,080−51.2% | Reduced |
| Wealth Enhancement Advisory Services, LLC | 49,086 | $4.22M | 0.01% | −2,788−5.4% | Reduced |
| Yousif Capital Management, LLC | 48,982 | $4.21M | 0.05% | −370−0.7% | Reduced |
| Alberta Investment Management Corp | 48,800 | $4.20M | 0.03% | +24,400+100.0% | Added |
| Raiffeisen Bank International AG | 49,170 | $4.18M | 0.07% | +11,027+28.9% | Added |
| Janus Henderson Group PLC | 49,171 | $4.18M | 0.00% | +11,814+31.6% | Added |
| Utah Retirement Systems | 48,214 | $4.15M | 0.05% | 00.0% | Unchanged |
| Y-Intercept (Hong Kong) Ltd | 47,980 | $4.13M | 0.28% | +20,376+73.8% | Added |
| Prudential PLC | 46,159 | $3.97M | 0.02% | −17,532−27.5% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 46,081 | $3.92M | 0.02% | −53−0.1% | Reduced |
| Swiss Life Asset Management Ltd | 45,325 | $3.90M | 0.03% | +7,304+19.2% | Added |
| WealthTrust Axiom LLC | 45,217 | $3.89M | 1.18% | −1,062−2.3% | Reduced |
| RB Capital Management, LLC | 45,098 | $3.88M | 0.94% | −1,242−2.7% | Reduced |
| CIBC Asset Management Inc | 44,666 | $3.84M | 0.01% | −286−0.6% | Reduced |
| Trinity Legacy Partners, LLC | 38,642 | $3.76M | 0.95% | −5,827−13.1% | Reduced |
| New York Life Investment Management LLC | 43,517 | $3.74M | 0.04% | −274−0.6% | Reduced |
| Bank of Nova Scotia | 43,429 | $3.74M | 0.01% | −4,204−8.8% | Reduced |
| Spirit of America Management Corp | 43,250 | $3.72M | 0.75% | +1,900+4.6% | Added |
| Truist Financial Corp | 43,084 | $3.71M | 0.01% | −1,667−3.7% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 42,359 | $3.64M | 0.04% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 42,272 | $3.64M | 0.02% | +7,862+22.8% | Added |
| Vectors Research Management, LLC | 42,076 | $3.62M | 1.27% | +3,623+9.4% | Added |
| Holderness Investments Co | 42,053 | $3.62M | 0.84% | −44−0.1% | Reduced |
| Mariner, LLC | 41,620 | $3.58M | 0.01% | −8,214−16.5% | Reduced |
| Nepsis, Inc. | 41,070 | $3.53M | 0.87% | −7,244−15.0% | Reduced |
| Quantinno Capital Management LP | 40,710 | $3.50M | 0.02% | +19,575+92.6% | Added |
| Shelton Capital Management | 40,663 | $3.50M | 0.08% | 00.0% | Unchanged |
| Centiva Capital, LP | 39,782 | $3.42M | 0.20% | +7,071+21.6% | Added |
| Neuberger Berman Group LLC | 39,516 | $3.40M | 0.00% | −475,718−92.3% | Reduced |
| Pensionfund DSM Netherlands | 38,500 | $3.31M | 2.19% | −4,000−9.4% | Reduced |
| Steward Partners Investment Advisory, LLC | 38,032 | $3.27M | 0.03% | +513+1.4% | Added |
| Pathstone Holdings, LLC | 36,172 | $3.12M | 0.01% | +1,739+5.1% | Added |
| FORA Capital, LLC | 36,263 | $3.12M | 0.32% | −12,563−25.7% | Reduced |
| Lee Danner & Bass Inc | 36,025 | $3.10M | 0.25% | +1,575+4.6% | Added |
| Cyndeo Wealth Partners, LLC | 35,089 | $3.02M | 0.20% | +30.0% | Added |
| Azimuth Capital Investment Management LLC | 34,716 | $2.99M | 0.12% | +1,346+4.0% | Added |
| Pacitti Group Inc. | 34,199 | $2.96M | 1.40% | +1,136+3.4% | Added |
| Mutual of America Capital Management LLC | 34,156 | $2.94M | 0.03% | −998−2.8% | Reduced |
| Cerity Partners LLC | 34,070 | $2.93M | 0.01% | +1,234+3.8% | Added |
| One Capital Management, LLC | 33,738 | $2.90M | 0.10% | −16,656−33.1% | Reduced |
| Lido Advisors, LLC | 33,259 | $2.89M | 0.02% | +6,971+26.5% | Added |
| Hourglass Capital, LLC | 33,400 | $2.87M | 0.75% | −30−0.1% | Reduced |
| Venture Visionary Partners LLC | 32,618 | $2.81M | 0.12% | −9,839−23.2% | Reduced |
| Smithfield Trust Co | 32,569 | $2.80M | 0.14% | −447−1.4% | Reduced |
| Horizon Kinetics Asset Management LLC | 32,455 | $2.79M | 0.03% | −445−1.4% | Reduced |
| Rafferty Asset Management, LLC | 32,029 | $2.76M | 0.01% | −6,579−17.0% | Reduced |
| Prevail Innovative Wealth Advisors, LLC | 31,648 | $2.72M | 0.73% | +31,648 | New |