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 |
|---|---|---|---|---|---|
| Tokio Marine Asset Management Co Ltd | 11,856 | $1.21M | 0.04% | +1,228+11.6% | Added |
| Kinneret Advisory, LLC | 11,843 | $1.22M | 0.10% | −53−0.4% | Reduced |
| Oak Thistle LLC | 11,980 | $1.22M | 0.19% | +5,513+85.2% | Added |
| Segall Bryant & Hamill, LLC | 12,009 | $1.22M | 0.02% | 00.0% | Unchanged |
| Widmann Financial Services, Inc. | 12,110 | $1.23M | 0.78% | −84−0.7% | Reduced |
| Advisory Services Network, LLC | 12,149 | $1.24M | 0.02% | +485+4.2% | Added |
| Man Group plc | 12,151 | $1.24M | 0.00% | −42,972−78.0% | Reduced |
| Oddo BHF Asset Management SAS | 12,276 | $1.25M | 0.05% | −15,294−55.5% | Reduced |
| Arista Wealth Management, LLC | 12,301 | $1.25M | 0.16% | 00.0% | Unchanged |
| HM Payson & Co | 12,526 | $1.28M | 0.02% | 00.0% | Unchanged |
| E. Ohman J:or Asset Management AB | 12,703 | $1.29M | 0.03% | 00.0% | Unchanged |
| Inceptionr LLC | 12,725 | $1.30M | 0.31% | −3,060−19.4% | Reduced |
| Wealthcare Advisory Partners LLC | 12,725 | $1.30M | 0.03% | −284−2.2% | Reduced |
| Roman Butler Fullerton & Co | 12,850 | $1.30M | 0.35% | +29+0.2% | Added |
| Schroder Investment Management Group | 13,079 | $1.31M | 0.00% | −738−5.3% | Reduced |
| Focus Financial Network, Inc. | 12,998 | $1.32M | 0.05% | +313+2.5% | Added |
| ExodusPoint Capital Management, LP | 13,038 | $1.33M | 0.02% | −75,009−85.2% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 13,089 | $1.33M | 0.03% | 00.0% | Unchanged |
| HB Wealth Management, LLC | 13,186 | $1.34M | 0.01% | +3,164+31.6% | Added |
| New Mexico Educational Retirement Board | 13,340 | $1.36M | 0.04% | −400−2.9% | Reduced |
| Crescent Grove Advisors, LLC | 13,255 | $1.36M | 0.13% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 13,369 | $1.36M | 0.02% | −53,376−80.0% | Reduced |
| Comprehensive Money Management Services LLC | 13,560 | $1.38M | 0.98% | −1,165−7.9% | Reduced |
| AE Wealth Management LLC | 13,566 | $1.38M | 0.01% | +504+3.9% | Added |
| Royal Fund Management, LLC | 13,695 | $1.40M | 0.17% | −865−5.9% | Reduced |
| Beacon Financial Advisory LLC | 13,836 | $1.41M | 0.33% | −426−3.0% | Reduced |
| Investment Management Corp of Ontario | 13,909 | $1.42M | 0.02% | +6,718+93.4% | Added |
| RSM US Wealth Management LLC | 13,838 | $1.42M | 0.02% | −255−1.8% | Reduced |
| Reik & Co., LLC | 13,980 | $1.43M | 0.37% | 00.0% | Unchanged |
| Kestra Private Wealth Services, LLC | 13,984 | $1.43M | 0.02% | −843−5.7% | Reduced |
| Spire Wealth Management | 13,996 | $1.43M | 0.05% | +518+3.8% | Added |
| Securian Asset Management, Inc | 14,197 | $1.45M | 0.04% | −1,164−7.6% | Reduced |
| Maryland State Retirement & Pension System | 14,259 | $1.45M | 0.03% | 00.0% | Unchanged |
| Community Bank of Raymore | 14,291 | $1.46M | 1.01% | +950+7.1% | Added |
| Metis Global Partners, LLC | 14,370 | $1.46M | 0.03% | +47+0.3% | Added |
| BI Asset Management Fondsmaeglerselskab A/S | 14,429 | $1.47M | 0.01% | +210+1.5% | Added |
| Intech Investment Management LLC | 14,437 | $1.47M | 0.01% | −120,960−89.3% | Reduced |
| DRW Securities, LLC | 14,414 | $1.47M | 0.08% | +6,254+76.6% | Added |
| Moody Lynn & Lieberson, LLC | 14,569 | $1.49M | 0.08% | +359+2.5% | Added |
| IMC-Chicago, LLC | 14,611 | $1.49M | 0.03% | +14,611 | New |
| Gulf International Bank (UK) Ltd | 14,690 | $1.50M | 0.05% | −220−1.5% | Reduced |
| Robeco Institutional Asset Management B.V. | 14,725 | $1.50M | 0.00% | 00.0% | Unchanged |
| Summit Trail Advisors, LLC | 14,765 | $1.51M | 0.02% | +8,482+135.0% | Added |
| Nomura Holdings Inc | 14,952 | $1.52M | 0.01% | +14,952 | New |
| Snowden Capital Advisors LLC | 14,889 | $1.53M | 0.04% | 00.0% | Unchanged |
| Crossmark Global Holdings, Inc. | 15,019 | $1.53M | 0.02% | −50,774−77.2% | Reduced |
| Creekmur Asset Management LLC | 15,097 | $1.54M | 0.26% | −548−3.5% | Reduced |
| Brookfield Asset Management Inc. | 15,115 | $1.54M | 0.00% | +922+6.5% | Added |
| Highline Wealth Partners LLC | 15,199 | $1.55M | 0.42% | −1,412−8.5% | Reduced |
| One Charles Private Wealth Services, LLC | 15,366 | $1.57M | 0.41% | +18+0.1% | Added |
| Louisiana State Employees Retirement System | 15,500 | $1.58M | 0.03% | −100−0.6% | Reduced |
| Brown Advisory Inc | 15,843 | $1.62M | 0.00% | +2,958+23.0% | Added |
| Diversify Advisory Services, LLC | 15,693 | $1.63M | 0.05% | −1,521−8.8% | Reduced |
| Commerce Bank | 16,191 | $1.65M | 0.01% | −2,027−11.1% | Reduced |
| King Luther Capital Management Corp | 16,210 | $1.65M | 0.01% | −436−2.6% | Reduced |
| Claro Advisors LLC | 16,213 | $1.65M | 0.24% | −92−0.6% | Reduced |
| IHT Wealth Management, LLC | 16,290 | $1.66M | 0.04% | −661−3.9% | Reduced |
| HighPoint Advisor Group LLC | 16,423 | $1.67M | 0.08% | +695+4.4% | Added |
| AG2R la Mondiale Gestion D'Actifs | 16,338 | $1.68M | 0.09% | 00.0% | Unchanged |
| Oppenheimer Asset Management Inc. | 16,777 | $1.71M | 0.02% | +2,761+19.7% | Added |
| 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 |
| ING Groep NV | 17,304 | $1.76M | 0.01% | −5,640−24.6% | Reduced |
| Trust Investment Advisors | 17,328 | $1.77M | 0.99% | +247+1.4% | Added |
| Jones Financial Companies LLLP | 18,075 | $1.82M | 0.00% | +1,202+7.1% | Added |
| Madison Asset Management, LLC | 17,960 | $1.83M | 0.02% | −571−3.1% | Reduced |
| Pensionfund Sabic | 18,100 | $1.84M | 0.50% | −1,200−6.2% | Reduced |
| Sterling Capital Management LLC | 18,140 | $1.85M | 0.03% | −1,731−8.7% | Reduced |
| Rakuten Investment Management, Inc. | 30,578 | $1.86M | 0.01% | +30,578 | New |
| DoubleLine ETF Adviser LP | 18,383 | $1.87M | 0.56% | +974+5.6% | Added |
| Kentucky Retirement Systems | 18,420 | $1.88M | 0.05% | −234−1.3% | Reduced |
| Westpac Banking Corp | 18,456 | $1.88M | 0.12% | 00.0% | Unchanged |
| Flputnam Investment Management Co | 18,746 | $1.91M | 0.03% | +670+3.7% | Added |
| RFG Advisory, LLC | 18,761 | $1.91M | 0.04% | −1,087−5.5% | Reduced |
| Moody National Bank Trust Division | 18,942 | $1.93M | 0.16% | −6,482−25.5% | Reduced |
| Kentucky Trust Co | 19,270 | $1.96M | 1.06% | −795−4.0% | Reduced |
| Zacks Investment Management | 19,412 | $1.98M | 0.02% | +140+0.7% | Added |
| Horizon Kinetics Asset Management LLC | 19,455 | $1.98M | 0.02% | −13,000−40.1% | Reduced |
| Mizuho Securities USA LLC | 21,511 | $1.99M | 0.04% | +1,125+5.5% | Added |
| Park Avenue Securities LLC | 19,520 | $1.99M | 0.02% | −934−4.6% | Reduced |
| MASTERINVEST Kapitalanlage GmbH | 19,717 | $2.01M | 0.20% | +1,280+6.9% | Added |
| Corrado Advisors, LLC | 19,746 | $2.01M | 1.08% | +5,469+38.3% | Added |
| Merit Financial Group, LLC | 19,930 | $2.03M | 0.02% | +109+0.5% | Added |
| Inspire Trust Co, N.A. | 20,000 | $2.04M | 0.37% | +3,000+17.6% | Added |
| Cascade Investment Group, Inc. | 20,486 | $2.09M | 1.38% | −427−2.0% | Reduced |
| Lido Advisors, LLC | 20,501 | $2.11M | 0.01% | +2,025+11.0% | Added |
| Everence Capital Management Inc | 20,717 | $2.11M | 0.13% | +2,927+16.5% | Added |
| Gables Capital Management Inc. | 20,792 | $2.12M | 0.91% | −750−3.5% | Reduced |
| Polar Asset Management Partners Inc. | 20,919 | $2.13M | 0.04% | −38,727−64.9% | Reduced |
| Heritage Trust Co | 21,154 | $2.16M | 0.23% | −21−0.1% | Reduced |
| Fiduciary Trust Co | 21,323 | $2.17M | 0.02% | −1,251−5.5% | Reduced |
| KCM Investment Advisors LLC | 21,327 | $2.17M | 0.07% | 00.0% | Unchanged |
| Verdence Capital Advisors LLC | 20,732 | $2.21M | 0.13% | +14,015+208.6% | Added |
| Erste Asset Management GmbH | 22,381 | $2.25M | 0.02% | −8,435−27.4% | Reduced |
| Fifth Third Bancorp | 22,162 | $2.26M | 0.01% | +1,072+5.1% | Added |
| Agf Management Ltd | 22,185 | $2.26M | 0.01% | +14,205+178.0% | Added |
| Wiley Bros.-Aintree Capital, LLC | 22,242 | $2.27M | 0.01% | +5,911+36.2% | Added |
| Tema ETFs LLC | 22,395 | $2.28M | 0.19% | +22,395 | New |
| Benjamin Edwards Inc | 22,448 | $2.29M | 0.03% | +3,399+17.8% | Added |
| Ancora Advisors, LLC | 22,454 | $2.29M | 0.05% | −386−1.7% | Reduced |