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CoStar Group

856 hedge funds and large institutions have $34B invested in CoStar Group in 2025 Q1 according to their latest regulatory filings, with 139 funds opening new positions, 376 increasing their positions, 264 reducing their positions, and 75 closing their positions.

New
Increased
Maintained
Reduced
Closed

183% more call options, than puts

Call options by funds: $337M | Put options by funds: $119M

85% more first-time investments, than exits

New positions opened: 139 | Existing positions closed: 75

44% more funds holding in top 10

Funds holding in top 10: 1623 (+7)

42% more repeat investments, than reductions

Existing positions increased: 376 | Existing positions reduced: 264

18% more capital invested

Capital invested by funds: $28.9B → $34B (+$5.08B)

7% more funds holding

Funds holding: 803856 (+53)

3.29% more ownership

Funds ownership: 98.4%101.68% (+3.3%)

Holders
856
Holders Change
+53
Holders Change %
+6.6%
% of All Funds
11.48%
Holding in Top 10
23
Holding in Top 10 Change
+7
Holding in Top 10 Change %
+43.75%
% of All Funds
0.31%
New
139
Increased
376
Reduced
264
Closed
75
Calls
$337M
Puts
$119M
Net Calls
+$218M
Net Calls Change
+$204M
Name Holding Trade Value Shares
Change
Change in
Stake
Kayne Anderson Rudnick Investment Management
76
Kayne Anderson Rudnick Investment Management
California
$66M -$5.73M -75,309 -8%
RhumbLine Advisers
77
RhumbLine Advisers
Massachusetts
$60.9M +$4.16M +54,747 +8%
HSBC Holdings
78
HSBC Holdings
United Kingdom
$60.2M -$10.3M -135,558 -15%
TCM
79
TimesSquare Capital Management
New York
$59.7M +$6.38M +83,901 +13%
PCM
80
Peregrine Capital Management
Minnesota
$58.6M +$10.7M +140,742 +24%
SIMG
81
Stephens Investment Management Group
Texas
$58.5M +$9.55M +125,568 +20%
CI Investments Inc
82
CI Investments Inc
Ontario, Canada
$57.6M +$1.68M +22,110 +3%
TD Asset Management
83
TD Asset Management
Ontario, Canada
$56.6M +$1.3M +17,141 +2%
Citigroup
84
Citigroup
New York
$55.4M +$8.01M +105,287 +18%
California State Teachers Retirement System (CalSTRS)
85
California State Teachers Retirement System (CalSTRS)
California
$55.2M +$1.21M +15,864 +2%
Raymond James Financial
86
Raymond James Financial
Florida
$54.4M +$3.38M +44,465 +7%
SEI Investments
87
SEI Investments
Pennsylvania
$53.9M +$1.99M +26,170 +4%
California Public Employees Retirement System
88
California Public Employees Retirement System
California
$50M -$698K -9,175 -1%
OCBV
89
Ownership Capital B.V.
Netherlands
$49.6M -$31.4M -412,599 -40%
ProShare Advisors
90
ProShare Advisors
Maryland
$48.9M +$5.76M +75,736 +14%
Natixis Advisors
91
Natixis Advisors
Massachusetts
$47.1M +$4.23M +55,589 +10%
DLA
92
Douglas Lane & Associates
New York
$44.1M +$13.2M +173,367 +45%
National Pension Service
93
National Pension Service
South Korea
$42.6M +$3.45M +45,316 +9%
QCMNJ
94
Quantum Capital Management (New Jersey)
New Jersey
$41.8M -$749K -9,845 -2%
Mitsubishi UFJ Trust & Banking
95
Mitsubishi UFJ Trust & Banking
Japan
$40.9M -$1.81M -23,830 -4%
TAM
96
Telemark Asset Management
Massachusetts
$39.6M +$7.61M +100,000 +25%
SCM
97
Spyglass Capital Management
California
$39.3M -$55.2M -725,749 -59%
Arrowstreet Capital
98
Arrowstreet Capital
Massachusetts
$39M +$35.6M +467,702 +1,903%
AllianceBernstein
99
AllianceBernstein
Tennessee
$37.8M +$693K +9,105 +2%
Allspring Global Investments
100
Allspring Global Investments
North Carolina
$37.7M -$492K -6,467 -1%