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 |
|---|---|---|---|---|---|
| Courier Capital LLC | 31,609 | $2.72M | 0.18% | +2,107+7.1% | Added |
| Algert Global LLC | 31,523 | $2.71M | 0.07% | +31,523 | New |
| Siemens Fonds Invest GmbH | 31,164 | $2.68M | 0.18% | −189−0.6% | Reduced |
| Warren Averett Asset Management, LLC | 31,158 | $2.68M | 0.03% | −34−0.1% | Reduced |
| Investor's Fiduciary Advisor Network, LLC | 30,949 | $2.66M | 1.26% | −3,726−10.7% | Reduced |
| James Hambro & Partners | 30,612 | $2.63M | 0.11% | −1,873−5.8% | Reduced |
| Dumont & Blake Investment Advisors LLC | 30,364 | $2.61M | 0.73% | +60+0.2% | Added |
| OP Asset Management Ltd | 30,309 | $2.61M | 0.04% | +30,309 | New |
| Public Employees Retirement Association of Colorado | 30,171 | $2.60M | 0.01% | 00.0% | Unchanged |
| Elo Mutual Pension Insurance Co | 29,924 | $2.57M | 0.06% | −463−1.5% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 29,904 | $2.57M | 0.01% | +1,286+4.5% | Added |
| Atria Wealth Solutions, Inc. | 29,417 | $2.55M | 0.03% | −12,055−29.1% | Reduced |
| Congress Wealth Management LLC | 29,559 | $2.55M | 0.03% | −3,347−10.2% | Reduced |
| Shell Asset Management Co | 29,497 | $2.54M | 0.12% | −7,347−19.9% | Reduced |
| D.A. Davidson & Co. | 29,216 | $2.51M | 0.02% | −307−1.0% | Reduced |
| CHB Investment Group, LLC | 29,175 | $2.51M | 1.33% | +357+1.2% | Added |
| ING Groep NV | 29,108 | $2.50M | 0.02% | −8,373−22.3% | Reduced |
| Sage Capital Management, LLC | 28,928 | $2.49M | 1.35% | −264−0.9% | Reduced |
| Norinchukin Bank, The | 28,668 | $2.47M | 0.05% | +2,577+9.9% | Added |
| O'Shaughnessy Asset Management, LLC | 28,369 | $2.44M | 0.02% | +3,896+15.9% | Added |
| Mackenzie Financial Corp | 28,337 | $2.44M | 0.00% | +3,248+12.9% | Added |
| Susquehanna Fundamental Investments, LLC | 28,209 | $2.43M | 0.04% | +21,478+319.1% | Added |
| Independent Advisor Alliance | 27,675 | $2.38M | 0.08% | −11,635−29.6% | Reduced |
| GWM Advisors LLC | 27,396 | $2.36M | 0.01% | −2,582−8.6% | Reduced |
| Wolverine Asset Management LLC | 27,282 | $2.35M | 0.05% | +8,385+44.4% | Added |
| Rakuten Investment Management, Inc. | 26,840 | $2.28M | 0.01% | +26,840 | New |
| AXA S.A. | 26,450 | $2.28M | 0.01% | +22,610+588.8% | Added |
| NEOS Investment Management LLC | 26,091 | $2.24M | 0.04% | +10,064+62.8% | Added |
| Aurora Investment Counsel | 25,444 | $2.19M | 1.21% | +25,444 | New |
| Oregon Public Employees Retirement Fund | 25,269 | $2.17M | 0.04% | +110+0.4% | Added |
| TFG Advisers LLC | 25,238 | $2.17M | 0.79% | +484+2.0% | Added |
| Ellsworth Advisors, LLC | 25,194 | $2.17M | 0.57% | +216+0.9% | Added |
| JustInvest LLC | 25,144 | $2.16M | 0.03% | +1,288+5.4% | Added |
| CoreFirst Bank & Trust | 25,074 | $2.16M | 1.39% | −100−0.4% | Reduced |
| Woodline Partners LP | 24,742 | $2.13M | 0.01% | +7,193+41.0% | Added |
| Gables Capital Management Inc. | 24,742 | $2.13M | 1.05% | +100+0.4% | Added |
| US Bancorp | 24,291 | $2.09M | 0.00% | +1,539+6.8% | Added |
| Erste Asset Management GmbH | 24,500 | $2.09M | 0.03% | −62,100−71.7% | Reduced |
| Capital Investment Advisors, LLC | 24,202 | $2.08M | 0.04% | −1,593−6.2% | Reduced |
| Entropy Technologies, LP | 24,177 | $2.08M | 0.20% | +24,177 | New |
| Moody National Bank Trust Division | 23,950 | $2.06M | 0.21% | +22+0.1% | Added |
| Banque Cantonale Vaudoise | 23,815 | $2.05M | 0.09% | +23,815 | New |
| GeoWealth Management, LLC | 23,760 | $2.04M | 0.08% | −3,469−12.7% | Reduced |
| Sippican Capital Advisors | 23,712 | $2.04M | 1.54% | −50−0.2% | Reduced |
| Mizuho Securities USA LLC | 23,520 | $2.02M | 0.04% | −4,293−15.4% | Reduced |
| PFG Investments, LLC | 23,466 | $2.02M | 0.13% | −2,136−8.3% | Reduced |
| Stock Yards Bank & Trust Co | 23,270 | $2.00M | 0.07% | −2,541−9.8% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 23,263 | $2.00M | 0.01% | +23,263 | New |
| Aigen Investment Management, LP | 23,104 | $1.99M | 0.32% | +23,104 | New |
| Quantbot Technologies LP | 23,078 | $1.99M | 0.06% | −22,844−49.7% | Reduced |
| Tredje AP-fonden | 23,057 | $1.98M | 0.02% | 00.0% | Unchanged |
| Ancora Advisors, LLC | 22,740 | $1.96M | 0.04% | 00.0% | Unchanged |
| Teachers Retirement System of the State of Kentucky | 22,601 | $1.94M | 0.02% | +941+4.3% | Added |
| F/M Investments LLC | 22,406 | $1.93M | 0.08% | −1,031−4.4% | Reduced |
| Quadrature Capital Ltd | 22,389 | $1.93M | 0.04% | +10,398+86.7% | Added |
| Fiduciary Trust Co | 21,574 | $1.86M | 0.02% | −148−0.7% | Reduced |
| Heritage Trust Co | 21,503 | $1.85M | 0.22% | −652−2.9% | Reduced |
| KCM Investment Advisors LLC | 21,310 | $1.83M | 0.07% | 00.0% | Unchanged |
| Susquehanna Portfolio Strategies, LLC | 21,247 | $1.83M | 0.79% | +21,247 | New |
| B. Metzler seel. Sohn & Co. AG | 21,193 | $1.82M | 0.02% | −3,505−14.2% | Reduced |
| Cascade Investment Group, Inc. | 21,080 | $1.81M | 1.39% | −480−2.2% | Reduced |
| Oak Thistle LLC | 20,886 | $1.80M | 0.36% | +13,665+189.2% | Added |
| Naviter Wealth, LLC | 20,769 | $1.78M | 0.22% | +753+3.8% | Added |
| Kentucky Trust Co | 20,595 | $1.77M | 1.05% | −895−4.2% | Reduced |
| Fifth Third Bancorp | 20,591 | $1.77M | 0.01% | −219−1.1% | Reduced |
| Illinois Municipal Retirement Fund | 20,469 | $1.76M | 0.03% | 00.0% | Unchanged |
| Robeco Institutional Asset Management B.V. | 20,206 | $1.74M | 0.00% | +1,039+5.4% | Added |
| Safe Harbor Fiduciary, LLC | 20,026 | $1.72M | 1.78% | −111−0.6% | Reduced |
| Kentucky Retirement Systems | 19,876 | $1.71M | 0.05% | −282−1.4% | Reduced |
| Natixis | 19,581 | $1.68M | 0.01% | +19,581 | New |
| Pensionfund Sabic | 19,300 | $1.66M | 0.50% | −3,000−13.5% | Reduced |
| Benjamin Edwards Inc | 19,020 | $1.64M | 0.02% | −3,319−14.9% | Reduced |
| Toroso Investments, LLC | 18,605 | $1.60M | 0.01% | +3,674+24.6% | Added |
| Madison Asset Management, LLC | 18,531 | $1.59M | 0.02% | −5,838−24.0% | Reduced |
| Tyler-Stone Wealth Management | 18,423 | $1.59M | 0.28% | −2,242−10.8% | Reduced |
| Trust Investment Advisors | 18,419 | $1.58M | 1.02% | +256+1.4% | Added |
| Ieq Capital, LLC | 18,264 | $1.57M | 0.01% | +1,304+7.7% | Added |
| RFG Advisory, LLC | 18,183 | $1.56M | 0.04% | +4,005+28.2% | Added |
| Commerce Bank | 18,174 | $1.56M | 0.01% | −1,480−7.5% | Reduced |
| AG2R la Mondiale Gestion D'Actifs | 15,836 | $1.56M | 0.08% | +15,836 | New |
| Hartford Investment Management Co | 18,001 | $1.55M | 0.05% | −185−1.0% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 17,827 | $1.53M | 0.04% | 00.0% | Unchanged |
| Zacks Investment Management | 17,685 | $1.52M | 0.01% | +537+3.1% | Added |
| Highline Wealth Partners LLC | 17,284 | $1.49M | 0.50% | −833−4.6% | Reduced |
| Everence Capital Management Inc | 17,280 | $1.49M | 0.10% | −3,210−15.7% | Reduced |
| Bramshill Investments, LLC | 17,241 | $1.48M | 0.15% | +10,518+156.4% | Added |
| DoubleLine ETF Adviser LP | 17,189 | $1.48M | 0.49% | −3,875−18.4% | Reduced |
| IHT Wealth Management, LLC | 17,089 | $1.47M | 0.05% | +6,668+64.0% | Added |
| King Luther Capital Management Corp | 17,041 | $1.47M | 0.01% | 00.0% | Unchanged |
| Inspire Trust Co, N.A. | 17,000 | $1.46M | 0.35% | +3,000+21.4% | Added |
| Snowden Capital Advisors LLC | 16,701 | $1.45M | 0.05% | −1,362−7.5% | Reduced |
| Gulf International Bank (UK) Ltd | 16,554 | $1.42M | 0.05% | −6,275−27.5% | Reduced |
| Claro Advisors LLC | 16,549 | $1.42M | 0.19% | −49−0.3% | Reduced |
| HighPoint Advisor Group LLC | 15,676 | $1.38M | 0.08% | −2,064−11.6% | Reduced |
| Louisiana State Employees Retirement System | 15,800 | $1.36M | 0.03% | 00.0% | Unchanged |
| Securian Asset Management, Inc | 15,545 | $1.34M | 0.04% | −226−1.4% | Reduced |
| Ossiam | 15,536 | $1.34M | 0.02% | −356−2.2% | Reduced |
| Burling Wealth Partners, LLC | 15,527 | $1.34M | 0.28% | −178−1.1% | Reduced |
| Metis Global Partners, LLC | 15,425 | $1.33M | 0.04% | +2,080+15.6% | Added |
| Principal Securities, Inc. | 12,542 | $1.32M | 0.03% | 00.0% | Unchanged |