Stocktoria
IRON MOUNTAIN INC IRM
IRON MOUNTAIN INC institutional holders
| Investor | Shares | Value | % of company |
|---|---|---|---|
| BlackRock Finance, Inc. | 27,891,960 | $2.5B | 9.37% |
| AQR CAPITAL MANAGEMENT LLC | 2,127,095 | $266.5M | 0.71% |
| CITADEL ADVISORS LLC | 628,968 | $79.4M | 0.21% |
| MILLENNIUM MANAGEMENT LLC | 252,157 | $31.8M | 0.08% |
| D. E. Shaw & Co., Inc. | 148,423 | $18.7M | 0.05% |
| Point72 Asset Management, L.P. | 123,262 | $15.6M | 0.04% |
| TWO SIGMA INVESTMENTS, LP | 70,692 | $8.9M | 0.02% |
| RENAISSANCE TECHNOLOGIES LLC | 7,700 | $972,587 | — |
% of company = reported institutional shares ÷ shares outstanding. Based on the latest reports; not every holder reports every quarter.
Computed from company filings · US · as of 2025-12-31. Facts plus Stocktoria's own computed scores — not investment advice.