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 |
|---|---|---|---|---|---|
| US Bancorp | 26,210 | $2.67M | 0.00% | +419+1.6% | Added |
| Aurora Investment Counsel | 26,177 | $2.67M | 1.40% | +239+0.9% | Added |
| Shelton Capital Management | 25,663 | $2.62M | 0.06% | 00.0% | Unchanged |
| American Assets Capital Advisers, LLC | 24,433 | $2.49M | 2.63% | +1,464+6.4% | Added |
| Investor's Fiduciary Advisor Network, LLC | 24,385 | $2.48M | 0.84% | −5,643−18.8% | Reduced |
| CoreFirst Bank & Trust | 24,079 | $2.45M | 1.33% | −755−3.0% | Reduced |
| Nepsis, Inc. | 23,942 | $2.44M | 0.77% | −8,052−25.2% | Reduced |
| PFG Investments, LLC | 23,916 | $2.44M | 0.13% | +317+1.3% | Added |
| Wolverine Asset Management LLC | 23,832 | $2.43M | 0.04% | −950−3.8% | Reduced |
| Sippican Capital Advisors | 23,532 | $2.40M | 1.59% | −180−0.8% | Reduced |
| GeoWealth Management, LLC | 23,419 | $2.39M | 0.09% | −213−0.9% | Reduced |
| Capital Investment Advisors, LLC | 23,227 | $2.37M | 0.04% | −152−0.7% | Reduced |
| Naviter Wealth, LLC | 23,005 | $2.36M | 0.28% | +664+3.0% | Added |
| F/M Investments LLC | 23,106 | $2.36M | 0.09% | −500−2.1% | Reduced |
| Stock Yards Bank & Trust Co | 23,047 | $2.35M | 0.07% | −223−1.0% | Reduced |
| Teachers Retirement System of the State of Kentucky | 22,954 | $2.34M | 0.02% | 00.0% | Unchanged |
| Avanza Fonder AB | 22,699 | $2.31M | 0.06% | +5,774+34.1% | Added |
| Ancora Advisors, LLC | 22,454 | $2.29M | 0.05% | −386−1.7% | Reduced |
| Benjamin Edwards Inc | 22,448 | $2.29M | 0.03% | +3,399+17.8% | Added |
| Tema ETFs LLC | 22,395 | $2.28M | 0.19% | +22,395 | New |
| Wiley Bros.-Aintree Capital, LLC | 22,242 | $2.27M | 0.01% | +5,911+36.2% | Added |
| Agf Management Ltd | 22,185 | $2.26M | 0.01% | +14,205+178.0% | Added |
| Fifth Third Bancorp | 22,162 | $2.26M | 0.01% | +1,072+5.1% | Added |
| Erste Asset Management GmbH | 22,381 | $2.25M | 0.02% | −8,435−27.4% | Reduced |
| Verdence Capital Advisors LLC | 20,732 | $2.21M | 0.13% | +14,015+208.6% | Added |
| KCM Investment Advisors LLC | 21,327 | $2.17M | 0.07% | 00.0% | Unchanged |
| Fiduciary Trust Co | 21,323 | $2.17M | 0.02% | −1,251−5.5% | Reduced |
| Heritage Trust Co | 21,154 | $2.16M | 0.23% | −21−0.1% | Reduced |
| Polar Asset Management Partners Inc. | 20,919 | $2.13M | 0.04% | −38,727−64.9% | Reduced |
| Gables Capital Management Inc. | 20,792 | $2.12M | 0.91% | −750−3.5% | Reduced |
| Everence Capital Management Inc | 20,717 | $2.11M | 0.13% | +2,927+16.5% | Added |
| Lido Advisors, LLC | 20,501 | $2.11M | 0.01% | +2,025+11.0% | Added |
| Cascade Investment Group, Inc. | 20,486 | $2.09M | 1.38% | −427−2.0% | Reduced |
| Inspire Trust Co, N.A. | 20,000 | $2.04M | 0.37% | +3,000+17.6% | Added |
| Merit Financial Group, LLC | 19,930 | $2.03M | 0.02% | +109+0.5% | Added |
| Corrado Advisors, LLC | 19,746 | $2.01M | 1.08% | +5,469+38.3% | Added |
| MASTERINVEST Kapitalanlage GmbH | 19,717 | $2.01M | 0.20% | +1,280+6.9% | Added |
| Park Avenue Securities LLC | 19,520 | $1.99M | 0.02% | −934−4.6% | Reduced |
| Mizuho Securities USA LLC | 21,511 | $1.99M | 0.04% | +1,125+5.5% | Added |
| Horizon Kinetics Asset Management LLC | 19,455 | $1.98M | 0.02% | −13,000−40.1% | Reduced |
| Zacks Investment Management | 19,412 | $1.98M | 0.02% | +140+0.7% | Added |
| Kentucky Trust Co | 19,270 | $1.96M | 1.06% | −795−4.0% | Reduced |
| Moody National Bank Trust Division | 18,942 | $1.93M | 0.16% | −6,482−25.5% | Reduced |
| RFG Advisory, LLC | 18,761 | $1.91M | 0.04% | −1,087−5.5% | Reduced |
| Flputnam Investment Management Co | 18,746 | $1.91M | 0.03% | +670+3.7% | Added |
| Westpac Banking Corp | 18,456 | $1.88M | 0.12% | 00.0% | Unchanged |
| Kentucky Retirement Systems | 18,420 | $1.88M | 0.05% | −234−1.3% | Reduced |
| DoubleLine ETF Adviser LP | 18,383 | $1.87M | 0.56% | +974+5.6% | Added |
| Rakuten Investment Management, Inc. | 30,578 | $1.86M | 0.01% | +30,578 | New |
| Sterling Capital Management LLC | 18,140 | $1.85M | 0.03% | −1,731−8.7% | Reduced |
| Pensionfund Sabic | 18,100 | $1.84M | 0.50% | −1,200−6.2% | Reduced |
| Madison Asset Management, LLC | 17,960 | $1.83M | 0.02% | −571−3.1% | Reduced |
| Jones Financial Companies LLLP | 18,075 | $1.82M | 0.00% | +1,202+7.1% | Added |
| Trust Investment Advisors | 17,328 | $1.77M | 0.99% | +247+1.4% | Added |
| ING Groep NV | 17,304 | $1.76M | 0.01% | −5,640−24.6% | Reduced |
| Edgestream Partners, L.P. | 17,300 | $1.76M | 0.05% | −114,182−86.8% | Reduced |
| Hartford Investment Management Co | 17,300 | $1.76M | 0.05% | −440−2.5% | Reduced |
| Oppenheimer Asset Management Inc. | 16,777 | $1.71M | 0.02% | +2,761+19.7% | Added |
| AG2R la Mondiale Gestion D'Actifs | 16,338 | $1.68M | 0.09% | 00.0% | Unchanged |
| HighPoint Advisor Group LLC | 16,423 | $1.67M | 0.08% | +695+4.4% | Added |
| IHT Wealth Management, LLC | 16,290 | $1.66M | 0.04% | −661−3.9% | Reduced |
| Claro Advisors LLC | 16,213 | $1.65M | 0.24% | −92−0.6% | Reduced |
| King Luther Capital Management Corp | 16,210 | $1.65M | 0.01% | −436−2.6% | Reduced |
| Commerce Bank | 16,191 | $1.65M | 0.01% | −2,027−11.1% | Reduced |
| Diversify Advisory Services, LLC | 15,693 | $1.63M | 0.05% | −1,521−8.8% | Reduced |
| Brown Advisory Inc | 15,843 | $1.62M | 0.00% | +2,958+23.0% | Added |
| Louisiana State Employees Retirement System | 15,500 | $1.58M | 0.03% | −100−0.6% | Reduced |
| One Charles Private Wealth Services, LLC | 15,366 | $1.57M | 0.41% | +18+0.1% | Added |
| Highline Wealth Partners LLC | 15,199 | $1.55M | 0.42% | −1,412−8.5% | Reduced |
| Brookfield Asset Management Inc. | 15,115 | $1.54M | 0.00% | +922+6.5% | Added |
| Creekmur Asset Management LLC | 15,097 | $1.54M | 0.26% | −548−3.5% | Reduced |
| Crossmark Global Holdings, Inc. | 15,019 | $1.53M | 0.02% | −50,774−77.2% | Reduced |
| Snowden Capital Advisors LLC | 14,889 | $1.53M | 0.04% | 00.0% | Unchanged |
| Nomura Holdings Inc | 14,952 | $1.52M | 0.01% | +14,952 | New |
| Summit Trail Advisors, LLC | 14,765 | $1.51M | 0.02% | +8,482+135.0% | Added |
| Robeco Institutional Asset Management B.V. | 14,725 | $1.50M | 0.00% | 00.0% | Unchanged |
| Gulf International Bank (UK) Ltd | 14,690 | $1.50M | 0.05% | −220−1.5% | Reduced |
| IMC-Chicago, LLC | 14,611 | $1.49M | 0.03% | +14,611 | New |
| Moody Lynn & Lieberson, LLC | 14,569 | $1.49M | 0.08% | +359+2.5% | Added |
| DRW Securities, LLC | 14,414 | $1.47M | 0.08% | +6,254+76.6% | Added |
| Intech Investment Management LLC | 14,437 | $1.47M | 0.01% | −120,960−89.3% | Reduced |
| BI Asset Management Fondsmaeglerselskab A/S | 14,429 | $1.47M | 0.01% | +210+1.5% | Added |
| Metis Global Partners, LLC | 14,370 | $1.46M | 0.03% | +47+0.3% | Added |
| Community Bank of Raymore | 14,291 | $1.46M | 1.01% | +950+7.1% | Added |
| Maryland State Retirement & Pension System | 14,259 | $1.45M | 0.03% | 00.0% | Unchanged |
| Securian Asset Management, Inc | 14,197 | $1.45M | 0.04% | −1,164−7.6% | Reduced |
| Spire Wealth Management | 13,996 | $1.43M | 0.05% | +518+3.8% | Added |
| Kestra Private Wealth Services, LLC | 13,984 | $1.43M | 0.02% | −843−5.7% | Reduced |
| Reik & Co., LLC | 13,980 | $1.43M | 0.37% | 00.0% | Unchanged |
| RSM US Wealth Management LLC | 13,838 | $1.42M | 0.02% | −255−1.8% | Reduced |
| Investment Management Corp of Ontario | 13,909 | $1.42M | 0.02% | +6,718+93.4% | Added |
| Beacon Financial Advisory LLC | 13,836 | $1.41M | 0.33% | −426−3.0% | Reduced |
| Royal Fund Management, LLC | 13,695 | $1.40M | 0.17% | −865−5.9% | Reduced |
| AE Wealth Management LLC | 13,566 | $1.38M | 0.01% | +504+3.9% | Added |
| Comprehensive Money Management Services LLC | 13,560 | $1.38M | 0.98% | −1,165−7.9% | Reduced |
| Engineers Gate Manager LP | 13,369 | $1.36M | 0.02% | −53,376−80.0% | Reduced |
| Crescent Grove Advisors, LLC | 13,255 | $1.36M | 0.13% | 00.0% | Unchanged |
| New Mexico Educational Retirement Board | 13,340 | $1.36M | 0.04% | −400−2.9% | Reduced |
| HB Wealth Management, LLC | 13,186 | $1.34M | 0.01% | +3,164+31.6% | Added |
| Dai-Ichi Life Insurance Company, Ltd | 13,089 | $1.33M | 0.03% | 00.0% | Unchanged |