IRMIron Mountain
Iron Mountain Incorporated, a Delaware corporation ("IMI"), was founded in an underground facility near Hudson, New York in 1951 where it stored business records. 10-K, Item 1
- Employees
- 11,700
- Headquarters
- Portsmouth, NH
- CEO
- William L. Meaney
- Next results
- around Feb 11, 2027
Who owns IRM
86% of the shares are held by institutions that file 13Fs; the rest by everyone else.
13F filings are quarterly and up to 45 days old. Insider trades: Form 4 rows coded P (bought) and S (sold) at a price, not grants or plan exercises.
Institutional ownership 13F data can be up to 45 days old
Every 13F-HR filed for the quarter ending Jun 30, 2026, from SEC's Form 13F data sets. A 13F lists the long positions of managers with more than $100M in US stocks. Two managers can report the same shares, so totals can count some shares twice.
| Holder | Shares | Value | % of company | From Mar 31, 2026 |
|---|---|---|---|---|
| BlackRock, Inc. | 33.57M | $4.2B | 11.27% | Added +1.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 25.57M | $3.2B | 8.58% | Added +2.2% |
| VANGUARD CAPITAL MANAGEMENT LLC | 18.95M | $2.4B | 6.36% | Added +1.0% |
| STATE STREET CORP | 17.63M | $2.2B | 5.92% | Held |
| COHEN & STEERS, INC. | 12.02M | $1.5M | 4.04% | Reduced -25.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 8.65M | $1.1B | 2.90% | Added +1.9% |
| FMR LLC | 7.87M | $994.4M | 2.64% | Added +5.2% |
| DIMENSIONAL FUND ADVISORS LP | 4.63M | $584.3M | 1.55% | Added +1.6% |
| MORGAN STANLEY | 4.43M | $559.2M | 1.49% | Reduced -4.8% |
| PRINCIPAL FINANCIAL GROUP INC | 4.37M | $552.4M | 1.47% | Reduced -4.2% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 4.26M | $538.5M | 1.43% | Added +6.2% |
| NORTHERN TRUST CORP | 4.22M | $533.4M | 1.42% | Added +1.7% |
| NORGES BANK | 4.21M | $532.4M | 1.42% | New |
| Invesco Ltd. | 4.07M | $513.5M | 1.37% | Added +3.7% |
| Legal & General Group Plc | 3.24M | $409.8M | 1.09% | Added +3.5% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 3.19M | $403.4M | 1.07% | Added ×298 |
| DEUTSCHE BANK AG\ | 3.05M | $385.1M | 1.02% | Reduced -1.4% |
| GOLDMAN SACHS GROUP INC | 2.82M | $356.5M | 0.95% | Added +27.3% |
| CENTERSQUARE INVESTMENT MANAGEMENT LLC | 2.32M | $293.5M | 0.78% | Added +0.6% |
| Nuveen, LLC | 2.22M | $280.3M | 0.74% | Added +7.3% |
| JPMORGAN CHASE & CO | 2.21M | $287.5M | 0.74% | Added +4.2% |
| AQR CAPITAL MANAGEMENT LLC | 2.13M | $266.5M | 0.71% | Added +15.2% |
| PRUDENTIAL FINANCIAL INC | 1.97M | $249.3M | 0.66% | Reduced -18.3% |
| Vontobel Holding Ltd. | 1.92M | $242.5M | 0.64% | Reduced -9.3% |
| Daiwa Securities Group Inc. | 1.86M | $235.1M | 0.63% | Reduced -40.1% |
Bought the most shares
- NORGES BANK +4.21M, new
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC +3.18M
- GOLDMAN SACHS GROUP INC +606K
- VANGUARD PORTFOLIO MANAGEMENT LLC +553K
- BlackRock, Inc. +550K
- VOLORIDGE INVESTMENT MANAGEMENT, LLC +413K, new
- FMR LLC +388K
- AMERICAN CENTURY COMPANIES INC +339K
- Aberdeen Group plc +320K
- SG Americas Securities, LLC +285K, new
Sold the most shares
- COHEN & STEERS, INC. -4.15M
- Daiwa Securities Group Inc. -1.25M
- PGGM Investments -695K
- Capital World Investors -650K
- Epoch Investment Partners, Inc. -617K, sold out
- PRUDENTIAL FINANCIAL INC -442K
- JANE STREET GROUP, LLC -311K
- STRS OHIO -288K, sold out
- BANK OF AMERICA CORP /DE/ -281K
- SEI INVESTMENTS CO -277K
Superinvestors holding IRM 13F data can be up to 45 days old
From the latest 13F-HR of each of the investors followed on Investors. A 13F shows holdings at the end of a quarter and is filed up to 45 days later.
None of the followed investors held IRM in their latest 13F.
13D filings: owners of more than 5% who may push for change
No Schedule 13D about IRM in the last year.
Work on IRM in a spreadsheet:
Excel workbook (a sheet per section, ten years by column, charts, links to the filings) ·
CSV.
For a Google Sheet that stays up to date, paste =IMPORTDATA("https://tickdelta.com/company/IRM/export.csv") into a cell.