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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
QCM
326
Qsemble Capital Management
New York
$1.43M
SC
327
Scotia Capital
Ontario, Canada
$1.41M
LIP
328
Liontrust Investment Partners
United Kingdom
$1.41M
PCS
329
Personal CFO Solutions
New Jersey
$1.4M
FG
330
Formula Growth
Quebec, Canada
$1.37M
ECM
331
EagleClaw Capital Management
Massachusetts
$1.36M
LRPA
332
L. Roy Papp & Associates
Arizona
$1.33M
GIBU
333
Gulf International Bank (UK)
United Kingdom
$1.32M
PA
334
Profund Advisors
Maryland
$1.31M
PS
335
Principal Securities
Iowa
$1.31M
Schroder Investment Management Group
336
Schroder Investment Management Group
United Kingdom
$1.3M
SC
337
Skylands Capital
Wisconsin
$1.29M
BOC
338
Barbara Oil Co
Illinois
$1.29M
DADC
339
D.A. Davidson & Co
Montana
$1.26M
HFM
340
Harvest Fund Management
China
$1.25M
QCM
341
QRG Capital Management
Illinois
$1.25M
SW
342
SlateStone Wealth
Florida
$1.24M
BMSSC
343
B. Metzler seel. Sohn & Co
Germany
$1.24M
CF
344
Centaurus Financial
California
$1.23M
Osaic Holdings
345
Osaic Holdings
Arizona
$1.23M
AC
346
AXQ Capital
New Jersey
$1.23M
IMCOOI
347
Investment Management Corp of Ontario (IMCO)
Canada
$1.23M
VPIM
348
Vanguard Personalized Indexing Management
California
$1.2M
MCC
349
Malaga Cove Capital
California
$1.19M
P
350
&Partners
Tennessee
$1.15M