Iron Mountain Incorporated (delaware) · NYSE:IRM
Iron Mountain Incorporated (delaware) shareholders
As of Jun 30, 2026, 1,146 institutions reported holding Iron Mountain Incorporated (delaware), 86.4% of its shares. Largest: Vanguard, BlackRock and State Street. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Iron Mountain Incorporated (delaware) | Change | Filed |
|---|---|---|---|---|
| Vanguard | 47.8M | 16.1% | +816K | Aug 13, 2026 |
| BlackRock | 33.6M | 11.3% | +550K | Aug 7, 2026 |
| State Street | 17.6M | 5.9% | +82,411 | Aug 7, 2026 |
| Cohen & Steers, Inc. | 12M | 4.0% | −4.15M | Aug 14, 2026 |
| Geode Capital | 8.65M | 2.9% | +163K | Aug 12, 2026 |
| Fidelity | 7.87M | 2.6% | +388K | Aug 13, 2026 |
| Dimensional | 4.63M | 1.6% | +73,398 | Aug 11, 2026 |
| Morgan Stanley | 4.43M | 1.5% | −225K | Aug 13, 2026 |
| Principal | 4.37M | 1.5% | −193K | Aug 4, 2026 |
| Schwab | 4.26M | 1.4% | +250K | Aug 14, 2026 |