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Iron Mountain
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Overview Fund Activity

1,018 hedge funds and large institutions have $25.4B invested in Iron Mountain in 2025 Q2 according to their latest regulatory filings, with 117 funds opening new positions, 383 increasing their positions, 349 reducing their positions, and 61 closing their positions.

Holders
1,018
Holders Change
+36
Holders Change %
+3.67%
% of All Funds
13.66%
Holding in Top 10
16
Holding in Top 10 Change
+6
Holding in Top 10 Change %
+60%
% of All Funds
0.21%
New
117
Increased
383
Reduced
349
Closed
61
Calls
$76.7M
Puts
$138M
Net Calls
-$60.9M
Net Calls Change
-$14.4M

Top Buyers

1
Principal Financial Group
1
Principal Financial Group
Iowa
$265M
2
Royal Bank of Canada
2
Royal Bank of Canada
Ontario, Canada
$210M
3
Invesco
3
Invesco
Georgia
$440M
4
Fidelity Investments
4
Fidelity Investments
Massachusetts
$687M
5
CAM
5
Contour Asset Management
New York
$240M

Top Sellers

1
BlackRock
1
BlackRock
New York
$3.21B
2
Citadel Advisors
2
Citadel Advisors
Florida
$14.3M
3
Point72 Asset Management
3
Point72 Asset Management
Connecticut
$104M
4
Qube Research & Technologies (QRT)
4
Qube Research & Technologies (QRT)
United Kingdom
$21.5M
5
Voloridge Investment Management
5
Voloridge Investment Management
Florida
$39.2M
Name Market Value Shares Shares
Change 		Shares
Change %
Renaissance Technologies
1026
Renaissance Technologies
New York
– – -85,763 Closed
BS
1027
Banco Santander
Spain
– – -77,016 Closed
BHC
1028
Bowen Hanes & Co
Florida
– – -75,000 Closed
Nomura Holdings
1029
Nomura Holdings
Japan
– – -74,514 Closed
CF
1030
Corebridge Financial
Texas
– – -73,436 Closed
FC
1031
FORA Capital
Florida
– – -36,263 Closed
AG
1032
Algert Global
California
– – -31,523 Closed
CIG
1033
CHB Investment Group
Pennsylvania
– – -29,175 Closed
EA
1034
Ellsworth Advisors
Ohio
– – -25,194 Closed
ET
1035
Entropy Technologies
New York
– – -24,177 Closed
AIM
1036
Aigen Investment Management
New York
– – -23,104 Closed
QC
1037
Quadrature Capital
United Kingdom
– – -22,389 Closed
DM
1038
Delphi Management
Massachusetts
– – -15,155 Closed
VIA
1039
Virtus Investment Advisers
Connecticut
– – -14,385 Closed
Vontobel Holding
1040
Vontobel Holding
Switzerland
– – -11,687 Closed
GS
1041
GWN Securities
Florida
– – -10,877 Closed
CIM
1042
Contravisory Investment Management
Massachusetts
– – -10,775 Closed
TC
1043
TownSquare Capital
Utah
– – -10,096 Closed
HBT
1044
Heartland Bank & Trust
Illinois
– – -9,492 Closed
USAA
1045
United Services Automobile Association
Texas
– – -7,308 Closed
NICM
1046
Neo Ivy Capital Management
New York
– – -6,468 Closed
BFM
1047
Boothbay Fund Management
New York
– – -6,385 Closed
DFCM
1048
Dark Forest Capital Management
Puerto Rico
– – -4,994 Closed
FC
1049
Farringdon Capital
United Kingdom
– – -4,540 Closed
MYAM
1050
Meiji Yasuda Asset Management
Japan
– – -4,454 Closed
40 41
42
43 44