IRON MOUNTAIN INC hedge fund holdings
IRMNYSE$113.39+2.26 (+2.03%)as of Oct 2, 2026
Every quarter, large institutional investment managers with over $100M in U.S.-listed assets under management disclose their U.S. equity holdings through 13F filings. Read together, those filings show which businesses professional capital is moving into and out of.
Price vs funds buying and selling
IRM · close · 13FReported Aug 14, 2026Price vs funds buying and selling data
Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+9.8%). 0 fund reports plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Funds buying · new + increased
Funds selling · reduced + closed
Net buyers vs sellers
Buying = new + increased; selling = reduced + closed. Counts exclude position changes under 5% of the fund's holding last quarter.Price and fund activity data
| Quarter | Funds buying | Funds selling | Bought | Sold | Filers | Reported |
|---|---|---|---|---|---|---|
| Q2 2025 | 294 | 247 | $2.01B | $1.43B | 982 | Aug 14, 2025 |
| Q3 2025 | 242 | 277 | $1.8B | $1.24B | 962 | Nov 14, 2025 |
| Q4 2025 | 243 | 311 | $1.25B | $1.29B | 954 | Feb 14, 2026 |
| Q1 2026 | 359 | 269 | $1.43B | $1.52B | 1,039 | May 15, 2026 |
| Q2 2026 | 366 | 245 | $1.79B | $1.85B | 1,095 | Aug 14, 2026 |
Quarterly action breakdown
Q2 2026
1,095 filersNew position
125$236M+1.87M sh
Increased
241$1.55B+12.3M sh
Reduced
189-$1.63B-12.9M sh
Out / sold
56-$218M-1.73M sh
Last 4 quarters · free
Reported Aug 14, 2026
| Fund | Action | Change in dollar | Value | % of portfolio | Reported |
|---|---|---|---|---|---|
| Cohen & Steers, Inc. | Reduce 25.66% | -$524M | $1.52B | 2.40% | Aug 14, 2026 |
| Daiwa Securities Group Inc. | Reduce 40.09% | -$157M | $235M | 0.46% | Jul 31, 2026 |
| PGGM Investments | Reduce 50.72% | -$87.8M | $85.3M | 2.10% | Aug 12, 2026 |
| Capital World Investors | Reduce 34.81% | -$82.1M | $154M | 0.02% | Aug 12, 2026 |
| Epoch Investment Partners, Inc. | Sell 100% | -$63M | $0 | 0.00% | Aug 13, 2026 |
| Voloridge Investment Management, LLC | New Buy | +$52.1M | $52.1M | 0.22% | Aug 14, 2026 |
| Aberdeen Group plc | Added 86.29% | +$40.5M | $87.3M | 0.12% | Jul 31, 2026 |
| Robeco Institutional Asset Management B.V. | Added 1939.98% | +$35.8M | $37.6M | 0.05% | Jul 21, 2026 |
| Quantinno Capital Management LP | Added 83.42% | +$33.9M | $74.6M | 0.09% | Aug 13, 2026 |
| Summit Partners Public Asset Management, LLC | New Buy | +$29.8M | $29.8M | 0.52% | Aug 14, 2026 |
| Healthcare of Ontario Pension Plan Trust Fund | Added 106.58% | +$28.9M | $56.1M | 0.08% | Aug 13, 2026 |
| Bamco Inc | Reduce 40.85% | -$27.1M | $39.2M | 0.06% | Aug 14, 2026 |
| Vontobel Holding Ltd. | Reduce 9.32% | -$24.9M | $242M | 0.77% | Aug 3, 2026 |
| Border to Coast Pensions Partnership Ltd | Reduce 41.49% | -$24.6M | $34.7M | 0.51% | Jul 27, 2026 |
| Brookfield Corp | Reduce 97.20% | -$23.1M | $665K | 0.00% | Aug 14, 2026 |
| Contour Asset Management LLC | Reduce 11.78% | -$21.5M | $161M | 3.81% | Aug 14, 2026 |
| Cbre Investment Management Listed Real Assets LLC | Reduce 13.33% | -$20.8M | $136M | 1.89% | Aug 14, 2026 |
| Wellington Management Group LLP | Added 47.42% | +$20.8M | $64.8M | 0.01% | Aug 14, 2026 |
| Gillson Capital LP | New Buy | +$17.4M | $17.4M | 1.03% | Aug 14, 2026 |
| Ensign Peak Advisors, Inc | Reduce 44.90% | -$16.9M | $20.7M | 0.03% | Aug 14, 2026 |
| Natixis | Added 1602.98% | +$16.4M | $17.5M | 0.07% | Aug 13, 2026 |
| Duff & Phelps Investment Management Co | Reduce 7.61% | -$15.1M | $184M | 1.73% | Aug 13, 2026 |
| Public Employees Retirement Association of Colorado | Added 410.13% | +$14.7M | $18.3M | 0.06% | Aug 11, 2026 |
| O'Neil Global Advisors, Inc. | New Buy | +$14.3M | $14.3M | 3.20% | Aug 10, 2026 |
| Cander Asset Management LP | Reduce 79.47% | -$13.4M | $3.46M | 0.64% | Aug 14, 2026 |
| OMERS ADMINISTRATION Corp | Added 771.35% | +$13M | $14.7M | 0.09% | Aug 13, 2026 |
| B&I Capital AG | Reduce 88.38% | -$13M | $1.71M | 3.77% | Aug 11, 2026 |
| Korea Investment CORP | Added 82.09% | +$12.4M | $27.6M | 0.05% | Aug 12, 2026 |
| Uniplan Investment Counsel, Inc. | New Buy | +$12.4M | $12.4M | 1.16% | Aug 14, 2026 |
| Heitman Real Estate Securities LLC | Added 37.80% | +$12.4M | $45.2M | 2.90% | Aug 14, 2026 |
| Schroder Investment Management Group | Added 724.74% | +$10M | $11.4M | 0.01% | Aug 13, 2026 |
| Mitsubishi UFJ Asset Management Co., Ltd. | Added 8.17% | +$9.38M | $124M | 0.07% | Aug 7, 2026 |
| VANGUARD ASSET MANAGEMENT, Ltd | Added 12.64% | +$8.06M | $71.9M | 0.05% | Aug 13, 2026 |
| Barometer Capital Management Inc. | New Buy | +$7.76M | $7.76M | 2.16% | Aug 12, 2026 |
| Thrivent Financial for Lutherans | Added 55.41% | +$7.46M | $20.9M | 0.04% | Aug 14, 2026 |
| ASR Vermogensbeheer N.V. | Reduce 91.91% | -$7.19M | $633K | 0.01% | Jul 20, 2026 |
| First Trust Advisors LP | Added 101.44% | +$7.14M | $14.2M | 0.01% | Aug 11, 2026 |
| Cibc World Market Inc. | Reduce 33.47% | -$7.12M | $14.2M | 0.02% | Aug 13, 2026 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Reduce 21.93% | -$6.97M | $24.8M | 0.02% | Aug 14, 2026 |
| Adage Capital Partners GP, L.L.C. | Reduce 9.30% | -$6.93M | $67.6M | 0.09% | Aug 14, 2026 |
| APG Asset Management N.V. | Added 37.17% | +$6.2M | $22.9M | 0.06% | Aug 12, 2026 |
| Pictet Asset Management Holding SA | Reduce 5.45% | -$5.95M | $103M | 0.10% | Jul 30, 2026 |
| DigitalBridge Group, Inc. | Reduce 9.30% | -$5.92M | $57.7M | 3.46% | Aug 14, 2026 |
| Oak Thistle LLC | Sell 100% | -$5.48M | $0 | 0.00% | Jul 21, 2026 |
| Cinctive Capital Management LP | New Buy | +$5.35M | $5.35M | 0.20% | Aug 14, 2026 |
| Brookstone Capital Management | Reduce 22.41% | -$5.35M | $18.5M | 0.19% | Jul 15, 2026 |
| Osmosis Investment Management UK Ltd | Reduce 66.83% | -$4.87M | $2.42M | 0.11% | Aug 13, 2026 |
| Handelsbanken Fonder AB | Added 24.44% | +$4.7M | $23.9M | 0.07% | Jul 10, 2026 |
| Intrinsic Edge Capital Management LLC | Reduce 30.57% | -$4.7M | $10.7M | 1.10% | Aug 12, 2026 |
| Sumitomo Mitsui Trust Group, Inc. | Reduce 3.98% | -$4.69M | $113M | 0.06% | Jul 30, 2026 |
| Susquehanna Portfolio Strategies, LLC | Added 156.74% | +$4.61M | $7.55M | 0.12% | Aug 14, 2026 |
| Nomura Asset Management International Inc. | Reduce 5.91% | -$4.38M | $69.7M | 0.10% | Aug 14, 2026 |
| Munich Reinsurance Co Stock Corp in Munich | New Buy | +$4.14M | $4.14M | 0.09% | Jul 24, 2026 |
| Elo Mutual Pension Insurance Co | New Buy | +$4.02M | $4.02M | 0.05% | Aug 13, 2026 |
| Adelante Capital Management LLC | Reduce 8.77% | -$3.95M | $41.1M | 2.70% | Aug 17, 2026 |
| Eurizon Capital SGR S.p.A. | Added 34.47% | +$3.9M | $15.2M | 0.04% | Jul 29, 2026 |
| Elevatus Welath Management | New Buy | +$3.75M | $3.75M | 0.91% | Aug 13, 2026 |
| Canada Pension Plan Investment Board | New Buy | +$3.71M | $3.71M | 0.00% | Aug 14, 2026 |
| Easterly Investment Partners LLC | Reduce 44.84% | -$3.51M | $4.32M | 0.22% | Jul 23, 2026 |
| OVERSEA-CHINESE BANKING Corp Ltd | Reduce 29.26% | -$3.42M | $8.26M | 0.18% | Aug 11, 2026 |
| Mirova | Reduce 32.56% | -$3.42M | $7.07M | 0.26% | Aug 13, 2026 |
| Swedbank AB | Added 10.27% | +$3.38M | $36.3M | 0.03% | Jul 15, 2026 |
| National Pension Service | Added 5.92% | +$3.21M | $57.4M | 0.04% | Aug 13, 2026 |
| Nomura Asset Management Co Ltd | Added 4.45% | +$3.16M | $74.3M | 0.16% | Aug 13, 2026 |
| Credit Agricole S A | Reduce 23.83% | -$3.04M | $9.72M | 0.02% | Aug 14, 2026 |
| Mitsubishi UFJ Trust & Banking Corp | Added 20.42% | +$3.03M | $17.9M | 0.04% | Aug 6, 2026 |
| DNB Asset Management AS | Reduce 26.03% | -$3M | $8.52M | 0.02% | Aug 11, 2026 |
| Simmons Bank | Added 666.15% | +$2.98M | $3.43M | 0.20% | Jul 31, 2026 |
| UniSuper Management Pty Ltd | Reduce 24.23% | -$2.81M | $8.8M | 0.05% | Aug 14, 2026 |
| Adams Diversified Equity Fund, Inc. | Added 27.35% | +$2.79M | $13M | 0.40% | Jul 22, 2026 |
| Sage Capital Management, LLC | Sell 100% | -$2.73M | $0 | 0.00% | Jul 20, 2026 |
| Mizuho Securities USA LLC | Added 130.24% | +$2.7M | $4.77M | 0.05% | Jul 28, 2026 |
| CANADA LIFE ASSURANCE Co | Added 5.90% | +$2.5M | $44.8M | 0.07% | Aug 13, 2026 |
| Jain Global LLC | Sell 100% | -$2.46M | $0 | 0.00% | Aug 14, 2026 |
| Varma Mutual Pension Insurance Co | Reduce 21.85% | -$2.4M | $8.58M | 0.05% | Aug 12, 2026 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | Added 13.17% | +$2.13M | $18.3M | 0.02% | Aug 13, 2026 |
| USS Investment Management Ltd | Added 24.74% | +$2.09M | $10.5M | 0.04% | Aug 11, 2026 |
| BI Asset Management Fondsmaeglerselskab A/S | Added 716.25% | +$1.94M | $2.21M | 0.02% | Aug 10, 2026 |
| Fideuram Asset Management (Ireland) dac | Added 51.34% | +$1.93M | $5.69M | 0.11% | Jul 23, 2026 |
| MML Investors Services, LLC | Added 22.52% | +$1.93M | $10.5M | 0.02% | Aug 7, 2026 |
| TCW Group Inc | Reduce 10.62% | -$1.82M | $15.3M | 0.10% | Aug 3, 2026 |
| Chicago Capital, LLC | Reduce 16.76% | -$1.78M | $8.83M | 0.21% | Jul 28, 2026 |
| Centersquare Investment Management LLC | Added 0.60% | +$1.76M | $294M | 2.51% | Aug 7, 2026 |
| Pinebridge Investments LLC | Added 35.11% | +$1.75M | $6.74M | 0.06% | Aug 14, 2026 |
| Metis Global Partners, LLC | Added 114.93% | +$1.73M | $3.24M | 0.07% | Aug 10, 2026 |
| Dockside LLC | New Buy | +$1.63M | $1.63M | 0.38% | Aug 3, 2026 |
| Tidal Investments LLC | Added 53.19% | +$1.63M | $4.69M | 0.01% | Aug 13, 2026 |
| Welch & Forbes LLC | Reduce 1.95% | -$1.61M | $80.8M | 0.98% | Jul 30, 2026 |
| Tredje AP-fonden | Added 10.24% | +$1.55M | $16.7M | 0.08% | Aug 10, 2026 |
| KLP Kapitalforvaltning As | Added 6.21% | +$1.5M | $25.6M | 0.08% | Aug 12, 2026 |
| Gotham Asset Management, LLC | Added 28.77% | +$1.44M | $6.46M | 0.02% | Aug 14, 2026 |
| First National Trust Co | Reduce 21.55% | -$1.38M | $5.02M | 0.17% | Jul 30, 2026 |
| Worldquant Millennium Advisors LLC | Reduce 1.99% | -$1.38M | $67.8M | 0.23% | Aug 14, 2026 |
| Xponance LLC | Added 18.99% | +$1.34M | $8.42M | 0.05% | Aug 10, 2026 |
| Nomura Holdings Inc | Added 109.17% | +$1.33M | $2.55M | 0.00% | Aug 14, 2026 |
| Highline Wealth Partners LLC | Reduce 97.49% | -$1.29M | $33.3K | 0.01% | Jul 15, 2026 |
| Union Bancaire Privee, UBP SA | New Buy | +$1.29M | $1.29M | 0.01% | Jul 16, 2026 |
| Fox Run Management, L.L.C. | Reduce 67.61% | -$1.26M | $603K | 0.10% | Aug 4, 2026 |
| Saudi Central Bank | Added 90.84% | +$1.25M | $2.63M | 0.03% | Jul 30, 2026 |
| Intact Investment Management Inc. | Reduce 13.83% | -$1.25M | $7.79M | 0.22% | Jul 20, 2026 |