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CoStar Group

881 hedge funds and large institutions have $34.8B invested in CoStar Group in 2025 Q3 according to their latest regulatory filings, with 105 funds opening new positions, 351 increasing their positions, 308 reducing their positions, and 62 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

2% more capital invested

Capital invested by funds: $34.1B → $34.8B (+$693M)

3.09% less ownership

Funds ownership: 100.61%97.52% (-3.1%)

4% less funds holding in top 10

Funds holding in top 10: 2625 (-1)

Holders
881
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
25
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$199M
Puts
$81.5M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
California Public Employees Retirement System
76
California Public Employees Retirement System
California
$61.6M
WIM
77
Weitz Investment Management
Nebraska
$60.7M
HSBC Holdings
78
HSBC Holdings
United Kingdom
$60.4M
Baird Financial Group
79
Baird Financial Group
Wisconsin
$59.7M
Ensign Peak Advisors
80
Ensign Peak Advisors
Utah
$58.9M
California State Teachers Retirement System (CalSTRS)
81
California State Teachers Retirement System (CalSTRS)
California
$58.7M
CI Investments Inc
82
CI Investments Inc
Ontario, Canada
$57.4M
First Trust Advisors
83
First Trust Advisors
Illinois
$56.9M
Citigroup
84
Citigroup
New York
$56.8M
BNP Paribas Financial Markets
85
BNP Paribas Financial Markets
France
$56.7M
SEI Investments
86
SEI Investments
Pennsylvania
$56.7M
DLA
87
Douglas Lane & Associates
New York
$55.2M
Parnassus Investments
88
Parnassus Investments
California
$53.7M
Marshall Wace
89
Marshall Wace
United Kingdom
$53.7M
Canada Pension Plan Investment Board
90
Canada Pension Plan Investment Board
Ontario, Canada
$53.5M
Natixis Advisors
91
Natixis Advisors
Massachusetts
$48.2M
National Pension Service
92
National Pension Service
South Korea
$46.7M
American Century Companies
93
American Century Companies
Missouri
$46.5M
TAM
94
Telemark Asset Management
Massachusetts
$46.4M
ProShare Advisors
95
ProShare Advisors
Maryland
$46.2M
IAM
96
Ion Asset Management
Israel
$45.1M
TCP
97
ThornTree Capital Partners
Massachusetts
$43M
FCM
98
Frontier Capital Management
Massachusetts
$41.4M
Russell Investments Group
99
Russell Investments Group
United Kingdom
$40.1M
Bank of Montreal
100
Bank of Montreal
Ontario, Canada
$39.6M