Stocktoria
IRON MOUNTAIN INC IRM
NYSE · XNYS · reit · Real Estate Investment Trusts · website · IPO 1996-02-01
IRON MOUNTAIN INC institutional holders (13F)
| Investor | Shares | Value | % of company |
|---|---|---|---|
| BlackRock Finance, Inc. | 27,891,960 | $2.5B | 9.37% |
| AQR CAPITAL MANAGEMENT LLC | 1,846,073 | $183.1M | 0.62% |
| CITADEL ADVISORS LLC | 679,554 | $69.4M | 0.23% |
| MILLENNIUM MANAGEMENT LLC | 451,463 | $46.1M | 0.15% |
| Point72 Asset Management, L.P. | 377,618 | $38.6M | 0.13% |
| SOROS FUND MANAGEMENT LLC | 310,000 | $31.7M | 0.1% |
| TWO SIGMA INVESTMENTS, LP | 188,202 | $19.2M | 0.06% |
| D. E. Shaw & Co., Inc. | 38,600 | $3.9M | 0.01% |
% of company = reported 13F shares ÷ shares outstanding. Based on the latest filings; not every holder reports every quarter.
Source: SEC EDGAR filings · CIK 0001020569 · as of 2025-12-31. Facts from filings plus Stocktoria's own computed scores — not investment advice.