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CoStar Group

833 hedge funds and large institutions have $27.8B invested in CoStar Group in 2025 Q4 according to their latest regulatory filings, with 96 funds opening new positions, 272 increasing their positions, 382 reducing their positions, and 141 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

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

less ownership

Funds ownership:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

29% less repeat investments, than reductions

Existing positions increased: 272 | Existing positions reduced: 382

32% less first-time investments, than exits

New positions opened: 96 | Existing positions closed: 141

32% less funds holding in top 10

Funds holding in top 10: 2517 (-8)

Holders
833
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
17
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$205M
Puts
$111M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
IFM
101
ION Fund Management
$31M
TD Asset Management
102
TD Asset Management
Ontario, Canada
$30.8M
Bank of Montreal
103
Bank of Montreal
Ontario, Canada
$30.5M
GCM
104
Geneva Capital Management
Wisconsin
$30.3M
NC
105
NZS Capital
Colorado
$29.7M
Natixis Advisors
106
Natixis Advisors
Massachusetts
$29.1M
AllianceBernstein
107
AllianceBernstein
Tennessee
$28.4M
SCM
108
Sone Capital Management
New York
$28M
Royal London Asset Management
109
Royal London Asset Management
United Kingdom
$27.5M
Marshall Wace
110
Marshall Wace
United Kingdom
$26.3M
Adage Capital Partners
111
Adage Capital Partners
Massachusetts
$25.7M
ClearBridge Investments
112
ClearBridge Investments
New York
$25.7M
State Board of Administration of Florida Retirement System
113
State Board of Administration of Florida Retirement System
Florida
$25.3M
ICP
114
Ironvine Capital Partners
Nebraska
$25M
AQR Capital Management
115
AQR Capital Management
Connecticut
$24.8M
YL
116
YCG LLC
Texas
$24.2M
Ninety One (UK)
117
Ninety One (UK)
United Kingdom
$23.9M
National Bank of Canada
118
National Bank of Canada
Quebec, Canada
$23.8M
LGF
119
LGT Group Foundation
Liechtenstein
$23.6M
Fiera Capital (Canada)
120
Fiera Capital (Canada)
Quebec, Canada
$23.6M
CI Investments Inc
121
CI Investments Inc
Ontario, Canada
$23.1M
AAM
122
Aureus Asset Management
Massachusetts
$22.7M
Victory Capital Management
123
Victory Capital Management
Texas
$22.5M
UM
124
Ulysses Management
New York
$22.2M
New York State Teachers Retirement System (NYSTRS)
125
New York State Teachers Retirement System (NYSTRS)
New York
$21.7M