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CoStar Group
CSGP

Overview Fund Activity

853 hedge funds and large institutions have $34B invested in CoStar Group in 2025 Q2 according to their latest regulatory filings, with 97 funds opening new positions, 345 increasing their positions, 311 reducing their positions, and 74 closing their positions.

Holders
853
Holders Change
+8
Holders Change %
+0.95%
% of All Funds
11.45%
Holding in Top 10
26
Holding in Top 10 Change
+3
Holding in Top 10 Change %
+13.04%
% of All Funds
0.35%
New
97
Increased
345
Reduced
311
Closed
74
Calls
$136M
Puts
$68M
Net Calls
+$68.4M
Net Calls Change
-$150M

Top Buyers

1
Janus Henderson Group
1
Janus Henderson Group
United Kingdom
$324M
2
Viking Global Investors
2
Viking Global Investors
Connecticut
$259M
3
Franklin Resources
3
Franklin Resources
California
$277M
4
TP
4
Third Point
New York
$248M
5
IAM
5
Ion Asset Management
Israel
$94.1M

Top Sellers

1
TCIM
1
TOMS Capital Investment Management
New York
$0
2
BlackRock
2
BlackRock
New York
$2.82B
3
MMA
3
Mizuho Markets Americas
New York
$471M
4
Ameriprise
4
Ameriprise
Minnesota
$86.7M
5
Macquarie Group
5
Macquarie Group
Australia
$389M
Name Market Value Shares Shares
Change 		Shares
Change %
LIS
851
Legacy Investment Solutions
Idaho
$242 3 +3 New
BCWM
852
Bartlett & Co Wealth Management
Ohio
$161 2 – –
CIAM
853
Caitong International Asset Management
Hong Kong
$161 2 – –
BA
854
Bellwether Advisors
Nebraska
$80 1 -52 -98%
EB
855
Eastern Bank
Massachusetts
$80 1 -30 -97%
HCM
856
Hollencrest Capital Management
California
$80 1 – –
MEG
857
Millstone Evans Group
Colorado
$80 1 – –
SA
858
Scarborough Advisors
Maryland
$80 1 +1 New
TCIM
859
TOMS Capital Investment Management
New York
– – -3,508,000 Closed
SCP
860
Soroban Capital Partners
New York
– – -1,050,747 Closed
Nomura Holdings
861
Nomura Holdings
Japan
– – -363,097 Closed
BFS
862
Baskin Financial Services
Ontario, Canada
– – -279,646 Closed
RL
863
Ruffer LLP
United Kingdom
– – -270,412 Closed
WCP
864
Waterfront Capital Partners
New York
– – -125,000 Closed
CF
865
Corebridge Financial
Texas
– – -122,624 Closed
PEAK6
866
PEAK6
Illinois
– – -101,555 Closed
Twin Tree Management
867
Twin Tree Management
Texas
– – -96,784 Closed
EP
868
Edgestream Partners
New Jersey
– – -90,987 Closed
OIAM
869
OFI Invest Asset Management
France
– – -40,000 Closed
Simplex Trading
870
Simplex Trading
Illinois
– – -25,214 Closed
PA
871
Procyon Advisors
Connecticut
– – -21,649 Closed
IMC Chicago
872
IMC Chicago
Illinois
– – -17,850 Closed
AC
873
Allstate Corporation
Illinois
– – -17,582 Closed
BHCM
874
Brevan Howard Capital Management
Jersey
– – -16,444 Closed
LA
875
Legacy Advisors
Pennsylvania
– – -14,101 Closed
33 34
35
36 37