Institutional Ownership
Iron Mtn Inc Del
CUSIP 46284V101COMIRMQ1 2026
13D / 13G Filings
22
Schedule 13D/13G on record
Beneficial Filers
7
Distinct reporting persons
Largest Stake
16.8%
Max % of class reported
Institutional Holders
1,070
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
22 filings · latest Feb 13, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 13, 2026 | Cohen &Amp; Steers, Inc. | 13G/A | 6.5% | 19.11M | SEC |
| 2 | Nov 14, 2025 | Cohen &Amp; Steers, Inc. | 13G | 5.4% | 16.03M | SEC |
| 3 | Mar 7, 2025 | Cohen &Amp; Steers, Inc. | 13G/A | 11.0% | 12.79M | SEC |
| 4 | Nov 14, 2024 | Cohen & Steers, Inc. | 13G/A | 6.2% | 18.05M | SEC |
| 5 | Oct 17, 2024 | State Street Corp | 13G | 5.7% | 16.57M | SEC |
| 6 | Sep 10, 2024 | Blackrock Inc. | 13G/A | 10.2% | 29.85M | SEC |
| 7 | Feb 14, 2024 | Cohen & Steers, Inc. | 13G | 7.8% | 22.91M | SEC |
| 8 | Feb 13, 2024 | Vanguard Group Inc | 13G/A | 15.8% | 46.28M | SEC |
| 9 | Jan 26, 2024 | Blackrock Inc. | 13G/A | 8.0% | 23.27M | SEC |
| 10 | Dec 11, 2023 | Capital World Investors | 13G/A | 1.6% | 4.62M | SEC |
12 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Iron Mtn Inc Del.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 33.02M | $3.37B |
| 2 | State Street Corp | 17.55M | $1.81B |
| 3 | Geode Capital Management, LLC | 8.49M | $863.70M |
| 4 | Fmr LLC | 7.48M | $764.46M |
| 5 | Morgan Stanley | 4.65M | $475.18M |
| 6 | Principal Financial Group Inc | 4.57M | $466.38M |
| 7 | Dimensional Fund Advisors LP | 4.55M | $464.93M |
| 8 | Northern Trust Corp | 4.15M | $423.93M |
| 9 | Charles Schwab Investment Management Inc | 4.01M | $409.89M |
| 10 | Invesco Ltd. | 3.92M | $400.54M |