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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
Walleye Trading
251
Walleye Trading
New York
$2.93M
QIM
252
Quantitative Investment Management
Virginia
$2.89M
BZWA
253
Blue Zone Wealth Advisors
California
$2.88M
HP
254
Havemeyer Place
Connecticut
$2.87M
II
255
Inspire Investing
Idaho
$2.84M
TRCT
256
Tower Research Capital (TRC)
New York
$2.82M
URS
257
Utah Retirement Systems
Utah
$2.73M
HWM
258
HB Wealth Management
Georgia
$2.68M
LTAS
259
Linden Thomas Advisory Services
North Carolina
$2.66M
Man Group
260
Man Group
United Kingdom
$2.61M
BFA
261
Buttonwood Financial Advisors
Maryland
$2.61M
PFSRSONJ
262
Police & Firemen's Retirement System of New Jersey
New Jersey
$2.59M
ERSOT
263
Employees Retirement System of Texas
Texas
$2.55M
American Century Companies
264
American Century Companies
Missouri
$2.5M
Neuberger Berman Group
265
Neuberger Berman Group
New York
$2.46M
US Bancorp
266
US Bancorp
Minnesota
$2.39M
ILCM
267
Ivy Lane Capital Management
Florida
$2.38M
NYLIM
268
New York Life Investment Management
New York
$2.37M
BCIM
269
British Columbia Investment Management
British Columbia, Canada
$2.36M
AP
270
Americana Partners
Texas
$2.32M
SMDAM
271
Sumitomo Mitsui DS Asset Management
Japan
$2.32M
A
272
Allianz
Germany
$2.26M
NSAM
273
North Star Asset Management
Wisconsin
$2.2M
UM
274
UniSuper Management
Australia
$2.16M
IUHSA
275
Itau Unibanco Holding S.A.
Brazil
$2.12M