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CoStar Group

786 hedge funds and large institutions have $16.4B invested in CoStar Group in 2026 Q1 according to their latest regulatory filings, with 126 funds opening new positions, 306 increasing their positions, 272 reducing their positions, and 166 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: 126 | Existing positions closed: 166

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
786
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
LIP
326
Liontrust Investment Partners
United Kingdom
$1.41M
PCS
327
Personal CFO Solutions
New Jersey
$1.4M
FG
328
Formula Growth
Quebec, Canada
$1.37M
ECM
329
EagleClaw Capital Management
Massachusetts
$1.36M
LRPA
330
L. Roy Papp & Associates
Arizona
$1.33M
GIBU
331
Gulf International Bank (UK)
United Kingdom
$1.32M
PA
332
Profund Advisors
Maryland
$1.31M
PS
333
Principal Securities
Iowa
$1.31M
Schroder Investment Management Group
334
Schroder Investment Management Group
United Kingdom
$1.3M
SC
335
Skylands Capital
Wisconsin
$1.29M
BOC
336
Barbara Oil Co
Illinois
$1.29M
DADC
337
D.A. Davidson & Co
Montana
$1.26M
HFM
338
Harvest Fund Management
China
$1.25M
QCM
339
QRG Capital Management
Illinois
$1.25M
SW
340
SlateStone Wealth
Florida
$1.24M
BMSSC
341
B. Metzler seel. Sohn & Co
Germany
$1.24M
CF
342
Centaurus Financial
California
$1.23M
Osaic Holdings
343
Osaic Holdings
Arizona
$1.23M
AC
344
AXQ Capital
New Jersey
$1.23M
IMCOOI
345
Investment Management Corp of Ontario (IMCO)
Canada
$1.23M
VPIM
346
Vanguard Personalized Indexing Management
California
$1.2M
MCC
347
Malaga Cove Capital
California
$1.19M
P
348
&Partners
Tennessee
$1.15M
Allianz Asset Management
349
Allianz Asset Management
Germany
$1.13M
DS
350
DRW Securities
Illinois
$1.12M