We are live on ! Find out more
CSGP icon

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

262% more call options, than puts

Call options by funds: $142M | Put options by funds: $39.3M

11% more repeat investments, than reductions

Existing positions increased: 307 | Existing positions reduced: 276

0.54% less ownership

Funds ownership: 97.52%96.98% (-0.54%)

7% less funds holding

Funds holding: 846791 (-55)

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
-55
Holders Change %
-6.5%
% of All Funds
9.74%
Holding in Top 10
7
Holding in Top 10 Change
-10
Holding in Top 10 Change %
-58.82%
% of All Funds
0.09%
New
125
Increased
307
Reduced
276
Closed
164
Calls
$142M
Puts
$39.3M
Net Calls
+$103M
Net Calls Change
+$7.38M
Name Holding Trade Value Shares
Change
Change in
Stake
RhumbLine Advisers
76
RhumbLine Advisers
Massachusetts
$32M +$1.25M +23,928 +3%
Squarepoint
77
Squarepoint
New York
$31.6M -$674K -12,956 -2%
BNP Paribas Financial Markets
78
BNP Paribas Financial Markets
France
$31M -$11.9M -229,097 -23%
PTC
79
Petrus Trust Company
Texas
$30.5M +$6.61M +127,002 +20%
VAM
80
Vanguard Asset Management
$29M +$37.4M +717,670 New
NC
81
NZS Capital
Colorado
$28.6M +$14M +268,064 +61%
National Pension Service
82
National Pension Service
South Korea
$28.3M +$1.07M +20,559 +3%
PCM
83
Peregrine Capital Management
Minnesota
$28.2M -$2.59M -49,721 -7%
Ameriprise
84
Ameriprise
Minnesota
$27.7M +$3.79M +72,738 +12%
AllianceBernstein
85
AllianceBernstein
Tennessee
$27.4M -$763K -14,665 -3%
California State Teachers Retirement System (CalSTRS)
86
California State Teachers Retirement System (CalSTRS)
California
$26.9M -$808K -15,527 -2%
ARAM
87
Ardmore Road Asset Management
New York
$26.9M +$34.7M +666,900 New
Raymond James Financial
88
Raymond James Financial
Florida
$25.4M +$6.21M +119,216 +23%
TSW
89
Thompson Siegel & Walmsley
Virginia
$24.8M +$32M +615,251 New
ProShare Advisors
90
ProShare Advisors
Maryland
$24.7M -$7.41M -142,389 -19%
Walleye Capital
91
Walleye Capital
New York
$21.7M +$26.3M +504,325 +1,554%
California Public Employees Retirement System
92
California Public Employees Retirement System
California
$21.5M -$10.4M -199,288 -27%
Marshall Wace
93
Marshall Wace
United Kingdom
$20.9M +$6.56M +125,955 +32%
WIM
94
Weitz Investment Management
Nebraska
$20.9M -$10.6M -202,825 -28%
PCM
95
Prana Capital Management
Connecticut
$20.8M +$10.3M +198,527 +63%
CBU
96
CIBC Bancorp USA
Illinois
$20.2M +$26M +500,113 New
WAM
97
Weiss Asset Management
Massachusetts
$20.1M +$24.1M +463,180 +1,350%
RIM
98
Rush Island Management
New York
$19.5M +$25.2M +483,200 New
Fiera Capital (Canada)
99
Fiera Capital (Canada)
Quebec, Canada
$19.4M +$6.81M +130,781 +37%
EAM
100
Erste Asset Management
Austria
$18.4M +$6.77M +130,000 +41%