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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
Allianz Asset Management
351
Allianz Asset Management
Germany
$1.13M
DS
352
DRW Securities
Illinois
$1.12M
WWM
353
Waterway Wealth Management
Texas
$1.12M
GCP
354
GSA Capital Partners
United Kingdom
$1.09M
TSW
355
Three Seasons Wealth
Utah
$1.07M
EI
356
Ethic Inc
New York
$1.07M
HA
357
Harbor Advisors
Florida
$1.07M
Janney Montgomery Scott
358
Janney Montgomery Scott
Pennsylvania
$1.07M
PP
359
Prudential plc
United Kingdom
$1.05M
PEAK6
360
PEAK6
Illinois
$1.05M
MSU
361
Mizuho Securities USA
New York
$1.03M
GWM
362
Gibbs Wealth Management
Georgia
$1.03M
TI
363
Tidal Investments
Wisconsin
$999K
ECM
364
ExodusPoint Capital Management
New York
$988K
HIMCH
365
Hartford Investment Management Co (HIMCO)
Connecticut
$980K
STA
366
Summit Trail Advisors
New York
$959K
AA
367
ALPS Advisors
Colorado
$954K
CGH
368
Crossmark Global Holdings
Texas
$945K
KeyBank National Association
369
KeyBank National Association
Ohio
$935K
TVPW
370
Third View Private Wealth
Connecticut
$916K
AIM
371
Aurora Investment Managers
Florida
$895K
DEA
372
DoubleLine ETF Adviser
Florida
$891K
AV
373
ASR Vermogensbeheer
Netherlands
$885K
IP
374
Intellectus Partners
California
$879K
OAC
375
OMERS Administration Corp
Ontario, Canada
$872K