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CoStar Group

791 hedge funds and large institutions have $16.4B invested in CoStar Group in 2026 Q1 according to their latest regulatory filings, with 125 funds opening new positions, 307 increasing their positions, 276 reducing their positions, and 164 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

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

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

less ownership

Funds ownership:

less funds holding

Funds holding:

24% less first-time investments, than exits

New positions opened: 125 | Existing positions closed: 164

41% less capital invested

Capital invested by funds: $27.8B → $16.4B (-$11.3B)

59% less funds holding in top 10

Funds holding in top 10: 177 (-10)

Holders
791
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
7
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$142M
Puts
$39.3M
Net Calls
Net Calls Change

Top Sellers

1 -$302M
2 -$233M
3 -$216M
4
TP
Third Point
New York
-$213M
5
BAMCO Inc
BAMCO Inc
New York
-$166M
Name Holding Trade Value Shares
Change
Change in
Stake
LPL Financial
201
LPL Financial
California
$4.79M
NAM
202
Nissay Asset Management
Japan
$4.76M
SOMRS
203
State of Michigan Retirement System
Michigan
$4.7M
CNB
204
Czech National Bank
Czech Republic
$4.66M
ASRS
205
Arizona State Retirement System
Arizona
$4.65M
State of Tennessee, Department of Treasury
206
State of Tennessee, Department of Treasury
Tennessee
$4.61M
Mariner
207
Mariner
Kansas
$4.42M
NOCM
208
Night Owl Capital Management
Connecticut
$4.41M
Connor, Clark & Lunn Investment Management (CC&L)
209
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$4.34M
AAIS
210
ABN AMRO Investment Solutions
$4.19M
DA
211
Dash Acquisitions
California
$4.18M
ACM
212
Ashford Capital Management
Delaware
$4.13M
WG
213
Winton Group
United Kingdom
$4.09M
MIM
214
MetLife Investment Management
New Jersey
$4.08M
IC
215
IEQ Capital
California
$4M
Swedbank
216
Swedbank
Sweden
$3.99M
Creative Planning
217
Creative Planning
Kansas
$3.92M
SW
218
SVB Wealth
Massachusetts
$3.88M
Bank of Nova Scotia
219
Bank of Nova Scotia
Ontario, Canada
$3.81M
Holocene Advisors
220
Holocene Advisors
New York
$3.75M
KBC Group
221
KBC Group
Belgium
$3.7M
GGHC
222
Gilder Gagnon Howe & Co
New York
$3.67M
Retirement Systems of Alabama
223
Retirement Systems of Alabama
Alabama
$3.63M
RIM
224
Rakuten Investment Management
Japan
$3.61M
GC
225
Guggenheim Capital
Illinois
$3.57M