Iron Mountain Inc (NYSE:IRM) is held by 971 institutional investors per 13F filings through December 2025.
| Owner Name | Date | Shares Held | Change (QoQ) | Change (%) | Value (USD) |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 31 Dec, 2025 | 46,627,483 | -625,617 | -1.32% | $3,867,749,715.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 33,021,354 | 101,696 | 0.31% | $3,372,801,141.00 |
| BlackRock, Inc. | 31 Dec, 2025 | 32,919,658 | 1,210,594 | 3.82% | $2,730,685,613.00 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 31 Dec, 2025 | 25,015,557 | 25,015,557 | 0.00% | $2,555,088,992.00 |
| Cohen & Steers, Inc. | 31 Dec, 2025 | 18,903,716 | 3,155,034 | 20.03% | $1,568,110.00 |
| VANGUARD CAPITAL MANAGEMENT LLC | 31 Dec, 2025 | 18,758,889 | 18,758,889 | 0.00% | $1,916,032,922.00 |
| State Street Corp | 31 Dec, 2025 | 17,551,633 | 662,835 | 3.92% | $1,807,660,367.00 |
| State Street Corp | 31 Dec, 2025 | 16,888,798 | -242,989 | -1.42% | $1,415,001,718.00 |
| Cohen & Steers, Inc. | 31 Dec, 2025 | 16,169,341 | -2,734,375 | -14.46% | $1,651,537.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Dec, 2025 | 8,486,127 | 193,474 | 2.33% | $863,699,269.00 |
| GEODE CAPITAL MANAGEMENT, LLC | 31 Dec, 2025 | 8,292,653 | 102,073 | 1.25% | $685,374,233.00 |
| FMR LLC | 31 Dec, 2025 | 7,984,304 | 126,212 | 1.61% | $662,298,027.00 |
| FMR LLC | 31 Dec, 2025 | 7,484,398 | -499,906 | -6.26% | $764,456,401.00 |
| Morgan Stanley | 31 Dec, 2025 | 4,652,247 | 1,053,274 | 29.27% | $475,180,655.00 |
| Principal Financial Group Inc | 31 Dec, 2025 | 4,566,093 | 358,497 | 8.52% | $466,382,473.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Dec, 2025 | 4,552,286 | 122,927 | 2.78% | $464,930,903.00 |
| NORGES BANK | 31 Dec, 2025 | 4,447,133 | 4,447,133 | 0.00% | $368,889,682.00 |
| DIMENSIONAL FUND ADVISORS LP | 31 Dec, 2025 | 4,429,359 | 81,320 | 1.87% | $367,418,097.00 |
| Invesco Ltd. | 31 Dec, 2025 | 4,417,367 | -649,149 | -12.81% | $366,420,630.00 |
| Principal Financial Group Inc | 31 Dec, 2025 | 4,207,596 | 1,680,438 | 66.50% | $349,020,857.00 |