Who owns Iron Mountain Inc (IRM)?
374 US mutual funds and ETFs from 163 fund families reported a position in IRM for the quarter ending 2026-06-30. Against their own report a quarter earlier, 123 raised shares, 44 opened a new position, 148 cut and 7 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Vanguard Index Funds | 6 | 45.6% |
| Ishares Trust | 13 | 14.4% |
| Select Sector Spdr Trust | 1 | 4.1% |
| Cohen & Steers Institutional Realty Shares Inc | 1 | 3.6% |
| Spdr Series Trust | 11 | 3.4% |
| Cohen & Steers Realty Shares Inc | 1 | 3.3% |
Tracked managers holding IRM
None of the managers Prior Moves tracks on 13F reports IRM in its latest filing.
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about IRM. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
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