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CoStar Group

860 hedge funds and large institutions have $34.1B invested in CoStar Group in 2025 Q2 according to their latest regulatory filings, with 98 funds opening new positions, 347 increasing their positions, 315 reducing their positions, and 74 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
860
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
26
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$180M
Puts
$97.5M
Net Calls
Net Calls Change

Top Buyers

1 +$320M
2 +$259M
3 +$114M
4
TP
Third Point
New York
+$89.2M
5
IAM
Ion Asset Management
Israel
+$82.7M
Name Holding Trade Value Shares
Change
Change in
Stake
Kayne Anderson Rudnick Investment Management
76
Kayne Anderson Rudnick Investment Management
California
$62.9M
RhumbLine Advisers
77
RhumbLine Advisers
Massachusetts
$62.9M
SIMG
78
Stephens Investment Management Group
Texas
$62.2M
Ensign Peak Advisors
79
Ensign Peak Advisors
Utah
$62M
WIM
80
Weitz Investment Management
Nebraska
$61.6M
CI Investments Inc
81
CI Investments Inc
Ontario, Canada
$57M
HSBC Holdings
82
HSBC Holdings
United Kingdom
$56.9M
PCM
83
Peregrine Capital Management
Minnesota
$56.3M
California State Teachers Retirement System (CalSTRS)
84
California State Teachers Retirement System (CalSTRS)
California
$56.1M
California Public Employees Retirement System
85
California Public Employees Retirement System
California
$55.2M
TD Asset Management
86
TD Asset Management
Ontario, Canada
$54.9M
Raymond James Financial
87
Raymond James Financial
Florida
$53.2M
ProShare Advisors
88
ProShare Advisors
Maryland
$53.2M
Parnassus Investments
89
Parnassus Investments
California
$52.7M
SEI Investments
90
SEI Investments
Pennsylvania
$52.6M
First Trust Advisors
91
First Trust Advisors
Illinois
$49.6M
CCM
92
Candlestick Capital Management
Connecticut
$47.9M
DLA
93
Douglas Lane & Associates
New York
$47M
Arrowstreet Capital
94
Arrowstreet Capital
Massachusetts
$44.9M
TAM
95
Telemark Asset Management
Massachusetts
$44.2M
National Pension Service
96
National Pension Service
South Korea
$43.5M
Natixis Advisors
97
Natixis Advisors
Massachusetts
$43.2M
Canada Pension Plan Investment Board
98
Canada Pension Plan Investment Board
Ontario, Canada
$43M
FCM
99
Frontier Capital Management
Massachusetts
$42.4M
TCP
100
ThornTree Capital Partners
Massachusetts
$41.2M