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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

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
Voloridge Investment Management
51
Voloridge Investment Management
Florida
$53.7M +$69.2M +1,329,958 New
UBS Group
52
UBS Group
Switzerland
$53.5M -$40.9M -785,262 -37%
Federated Hermes
53
Federated Hermes
Pennsylvania
$52.4M -$1.3M -25,041 -2%
AQR Capital Management
54
AQR Capital Management
Connecticut
$50.9M +$46.5M +893,352 +242%
Swiss National Bank
55
Swiss National Bank
Switzerland
$50.2M +$4.31M +82,800 +7%
Barclays
56
Barclays
United Kingdom
$49.7M -$56.7M -1,089,679 -47%
RP
57
Riverbridge Partners
Minnesota
$49.5M -$11.7M -225,155 -16%
SCM
58
Spyglass Capital Management
California
$44.8M -$24.3M -467,225 -30%
Citadel Advisors
59
Citadel Advisors
Florida
$43.9M +$25.2M +483,661 +80%
Jane Street
60
Jane Street
New York
$43.9M +$44.3M +850,071 +358%
CC
61
Chicago Capital
Illinois
$42.6M +$11.9M +228,497 +28%
Mitsubishi UFJ Asset Management
62
Mitsubishi UFJ Asset Management
Japan
$42.4M -$278K -5,343 -0.5%
Massachusetts Financial Services
63
Massachusetts Financial Services
Massachusetts
$39.2M -$115M -2,203,829 -70%
Sumitomo Mitsui Trust Group
64
Sumitomo Mitsui Trust Group
Japan
$38.5M -$2.37M -45,610 -5%
Citigroup
65
Citigroup
New York
$38.5M -$28.5M -548,401 -37%
VGA
66
Vanguard Global Advisers
Pennsylvania
$37.4M +$48.3M +928,271 New
Focus Partners Wealth
67
Focus Partners Wealth
Massachusetts
$37.2M +$4.22M +81,003 +10%
William Blair & Company
68
William Blair & Company
Illinois
$36.3M -$58.5M -1,123,210 -56%
SIMG
69
Stephens Investment Management Group
Texas
$35.2M -$12.6M -242,509 -22%
CM
70
Corvex Management
New York
$34.4M +$44.3M +851,734 New
First Trust Advisors
71
First Trust Advisors
Illinois
$33.8M +$7.06M +135,686 +19%
ACM
72
American Capital Management
New York
$33.3M -$2.29K -44 -0%
DLA
73
Douglas Lane & Associates
New York
$32.4M +$6.29M +120,778 +18%
Primecap Management
74
Primecap Management
California
$32.4M +$34M +652,600 +432%
TCM
75
TimesSquare Capital Management
New York
$32.1M -$715K -13,741 -2%