Iron Mountain Inc (NYSE:IRM) has 971 institutional investors with active 13F positions as of December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| BlackRock, Inc. | 31 Mar, 2026 | 33,021,354 | 101,696 | 0.31% | $3,372,801,141.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Mar, 2026 | 25,015,557 | 25,015,557 | 0.00% | $2,555,088,992.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Mar, 2026 | 18,758,889 | 18,758,889 | 0.00% | $1,916,032,922.00 |
| State Street Corp | 31 Mar, 2026 | 17,551,633 | 662,835 | 3.92% | $1,807,660,367.00 |
| Cohen & Steers, Inc. | 31 Mar, 2026 | 16,169,341 | -2,734,375 | -14.46% | $1,651,537.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Mar, 2026 | 8,486,127 | 193,474 | 2.33% | $863,699,269.00 |
| FMR LLC | 31 Mar, 2026 | 7,484,398 | -499,906 | -6.26% | $764,456,401.00 |
| Morgan Stanley | 31 Mar, 2026 | 4,652,247 | 1,053,274 | 29.27% | $475,180,655.00 |
| Principal Financial Group Inc | 31 Mar, 2026 | 4,566,093 | 358,497 | 8.52% | $466,382,473.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Mar, 2026 | 4,552,286 | 122,927 | 2.78% | $464,930,903.00 |
| Northern Trust Corp | 31 Mar, 2026 | 4,150,486 | -2,083 | -0.05% | $423,930,638.00 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 31 Mar, 2026 | 4,013,007 | 132,732 | 3.42% | $409,888,535.00 |
| Invesco Ltd. | 31 Mar, 2026 | 3,921,521 | -495,846 | -11.22% | $400,544,198.00 |
| Legal & General Group Plc | 31 Mar, 2026 | 3,135,074 | -221,346 | -6.59% | $320,216,461.00 |
| Daiwa Securities Group Inc. | 31 Mar, 2026 | 3,107,440 | -546,646 | -14.96% | $317,393,921.00 |
| DEUTSCHE BANK AG\ | 31 Mar, 2026 | 3,092,084 | 550,092 | 21.64% | $315,825,461.00 |
| Prudential Financial Inc | 31 Mar, 2026 | 2,416,063 | 105,582 | 4.57% | $246,776,675.00 |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC | 31 Mar, 2026 | 2,310,045 | -321,408 | -12.21% | $235,947,996.00 |
| Goldman Sachs Group Inc | 31 Mar, 2026 | 2,216,672 | -833,127 | -27.32% | $226,410,923.00 |
| Jpmorgan Chase & Co | 31 Mar, 2026 | 2,123,358 | 195,423 | 10.14% | $207,239,854.00 |