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Iron Mountain
1,006 hedge funds and large institutions have $21.4B invested in Iron Mountain in 2025 Q4 according to their latest regulatory filings, with 117 funds opening new positions, 327 increasing their positions, 408 reducing their positions, and 105 closing their positions.
New
Increased
Maintained
Reduced
Closed
62% more call options, than puts
Call options by funds: $114M | Put options by funds: $70.6M
11% more first-time investments, than exits
New positions opened: 117 | Existing positions closed: 105
2.37% more ownership
Funds ownership: 84.75% → 87.12% (+2.4%)
1% less funds holding
Funds holding: 1,015 → 1,006 (-9)
16% less capital invested
Capital invested by funds: $25.5B → $21.4B (-$4.15B)
20% less repeat investments, than reductions
Existing positions increased: 327 | Existing positions reduced: 408
46% less funds holding in top 10
Funds holding in top 10: 13 → 7 (-6)
Holders
1,006
Holders Change
-9
Holders Change %
-0.89%
% of All Funds
12.24%
Holding in Top 10
7
Holding in Top 10 Change
-6
Holding in Top 10 Change %
-46.15%
% of All Funds
0.09%
New
117
Increased
327
Reduced
408
Closed
105
Calls
$114M
Puts
$70.6M
Net Calls
+$43.5M
Net Calls Change
+$50.4M
Top Buyers
| 1 |
Cohen & Steers
New York
|
+$295M |
| 2 |
Principal Financial Group
Des Moines,
Iowa
|
+$157M |
| 3 |
BlackRock
New York
|
+$113M |
| 4 |
Citadel Advisors
Miami,
Florida
|
+$99M |
| 5 |
Vontobel Holding
Zurich,
Switzerland
|
+$57.2M |
Top Sellers
| 1 |
UBS AM
Chicago,
Illinois
|
-$296M |
| 2 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
-$94.8M |
| 3 |
Invesco
Atlanta,
Georgia
|
-$60.8M |
| 4 |
UBS Group
Zurich,
Switzerland
|
-$59.9M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
-$58.6M |
