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Interactive Brokers
IBKR

Overview Fund Activity

784 hedge funds and large institutions have $20.9B invested in Interactive Brokers in 2025 Q2 according to their latest regulatory filings, with 143 funds opening new positions, 620 increasing their positions, 18 reducing their positions, and 79 closing their positions.

Holders
784
Holders Change
+48
Holders Change %
+6.52%
% of All Funds
10.53%
Holding in Top 10
30
Holding in Top 10 Change
+8
Holding in Top 10 Change %
+36.36%
% of All Funds
0.4%
New
143
Increased
620
Reduced
18
Closed
79
Calls
$399M
Puts
$335M
Net Calls
+$64.1M
Net Calls Change
-$21.2M

Top Buyers

1
Vanguard Group
1
Vanguard Group
Pennsylvania
$2.32B
2
BlackRock
2
BlackRock
New York
$2.23B
3
State Street
3
State Street
Massachusetts
$838M
4
CCM
4
Cantillon Capital Management
New York
$709M
5
Kayne Anderson Rudnick Investment Management
5
Kayne Anderson Rudnick Investment Management
California
$692M

Top Sellers

1
JAM
1
Jupiter Asset Management
United Kingdom
$0
2
WorldQuant Millennium Advisors
2
WorldQuant Millennium Advisors
New York
$0
3
Balyasny Asset Management
3
Balyasny Asset Management
Illinois
$0
4
CF
4
Corebridge Financial
Texas
$0
5
Tudor Investment Corp
5
Tudor Investment Corp
Connecticut
$0
Name Market Value Shares Shares
Change 		Shares
Change %
Walleye Capital
801
Walleye Capital
New York
– – -15,149 Closed
NRD
802
Nebula Research & Development
New York
– – -14,021 Closed
ETC
803
Exchange Traded Concepts
Oklahoma
– – -13,624 Closed
SM
804
Sciencast Management
New Jersey
– – -12,631 Closed
SRL
805
Scientech Research LLC
New Jersey
– – -12,399 Closed
LAM
806
LECAP Asset Management
United Kingdom
– – -12,179 Closed
CM
807
Capula Management
Cayman Islands
– – -11,100 Closed
CSS
808
Cubist Systematic Strategies
Connecticut
– – -10,882 Closed
IUHSA
809
Itau Unibanco Holding S.A.
Brazil
– – -10,123 Closed
QC
810
Quadrature Capital
United Kingdom
– – -9,884 Closed
HT
811
Headlands Technologies
Illinois
– – -9,363 Closed
CAU
812
Caxton Associates (UK)
– – -8,358 Closed
SB
813
SIG Brokerage
New York
– – -7,876 Closed
PCM
814
Prelude Capital Management
New York
– – -7,107 Closed
USAA
815
United Services Automobile Association
Texas
– – -7,084 Closed
TC
816
TownSquare Capital
Utah
– – -6,843 Closed
YIH
817
Y-Intercept (HK)
Hong Kong
– – -6,512 Closed
QIM
818
Quantitative Investment Management
Virginia
– – -6,112 Closed
AIM
819
Aigen Investment Management
New York
– – -6,076 Closed
AC
820
Allstate Corporation
Illinois
– – -5,676 Closed
Simplex Trading
821
Simplex Trading
Illinois
– – -5,566 Closed
WLG
822
Williamson Legacy Group
Indiana
– – -4,962 Closed
MS
823
Maven Securities
Jersey
– – -3,500 Closed
1C
824
111 Capital
France
– – -3,461 Closed
NERM
825
New England Research & Management
Illinois
– – -3,250 Closed
31 32
33
34 35