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CoStar Group
CSGP

903 hedge funds and large institutions have $34.9B invested in CoStar Group in 2025 Q3 according to their latest regulatory filings, with 108 funds opening new positions, 361 increasing their positions, 314 reducing their positions, and 63 closing their positions.

New
Increased
Maintained
Reduced
Closed

144% more call options, than puts

Call options by funds: $199M | Put options by funds: $81.5M

71% more first-time investments, than exits

New positions opened: 108 | Existing positions closed: 63

15% more repeat investments, than reductions

Existing positions increased: 361 | Existing positions reduced: 314

4% more funds holding

Funds holding: 871 → 903 (+32)

2% more capital invested

Capital invested by funds: $34.2B → $34.9B (+$698M)

3.07% less ownership

Funds ownership: 100.7% → 97.63% (-3.1%)

4% less funds holding in top 10

Funds holding in top 10: 26 → 25 (-1)

Holders
903
Holders Change
+32
Holders Change %
+3.67%
% of All Funds
11.85%
Holding in Top 10
25
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-3.85%
% of All Funds
0.33%
New
108
Increased
361
Reduced
314
Closed
63
Calls
$199M
Puts
$81.5M
Net Calls
+$117M
Net Calls Change
+$34.8M

Top Buyers

1
N
Nuveen
North Carolina
+$214M
2
Janus Henderson Group
Janus Henderson Group
United Kingdom
+$193M
3
Citadel Advisors
Citadel Advisors
Florida
+$150M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$107M
5
Morgan Stanley
Morgan Stanley
New York
+$100M

Top Sellers

1
Capital International Investors
Capital International Investors
California
-$710M
2
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
-$264M
3
Bank of America
Bank of America
North Carolina
-$126M
4
Viking Global Investors
Viking Global Investors
Connecticut
-$121M
5
SCM
SG Capital Management
Illinois
-$74.7M
Name Holding Trade Value Shares
Change 		Change in
Stake
SA
901
Scarborough Advisors
Maryland
$84 – – –
YDMI
902
Y.D. More Investments
Israel
$29 +$9.99K +113 New
Norges Bank
903
Norges Bank
Norway
– -$427M -5,308,249 Closed
CCM
904
Candlestick Capital Management
Connecticut
– -$47.9M -596,098 Closed
BA
905
Bridgewater Associates
Connecticut
– -$34.8M -432,708 Closed
TIG
906
Tribune Investment Group
New York
– -$14.5M -180,000 Closed
CIBC World Market
907
CIBC World Market
Ontario, Canada
– -$12.2M -151,534 Closed
DCM
908
Driehaus Capital Management
Illinois
– -$7.73M -96,183 Closed
Westfield Capital Management
909
Westfield Capital Management
Massachusetts
– -$5.99M -74,545 Closed
Axa
910
Axa
France
– -$3.2M -39,822 Closed
CHP
911
Castle Hook Partners
New York
– -$2.54M -31,593 Closed
Two Sigma Investments
912
Two Sigma Investments
New York
– -$2.32M -26,299 Closed
SC
913
SummitTX Capital
Texas
– -$1.82M -22,585 Closed
MC
914
Moors & Cabot
Massachusetts
– -$1.63M -20,233 Closed
MG
915
Markel Group
Virginia
– -$1.5M -18,600 Closed
CCS
916
Concentric Capital Strategies
Connecticut
– -$1.35M -16,758 Closed
WG
917
Winton Group
United Kingdom
– -$1.23M -15,285 Closed
TC
918
TradeLink Capital
Illinois
– -$1.21M -15,081 Closed
SBFM
919
S-Bank Fund Management
Finland
– -$1.07M -13,316 Closed
BCM
920
Bayesian Capital Management
New York
– -$973K -12,100 Closed
VI
921
Versor Investments
New York
– -$748K -9,300 Closed
HLA
922
Hamilton Lane Advisors
Pennsylvania
– -$742K -9,232 Closed
Grantham, Mayo, Van Otterloo & Co (GMO)
923
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
– -$673K -8,373 Closed
I
924
InceptionR
California
– -$659K -8,202 Closed
FC
925
Farringdon Capital
United Kingdom
– -$559K -6,957 Closed
35 36
37
38 39

CSGP Hedge Fund Activity: Q3 2025 in Review

903 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in CoStar Group (CSGP) for Q3 2025, worth a combined $34.9B — up 2% from $34.2B a quarter earlier.

Buyers outnumbered sellers: 108 funds opened new CSGP positions and 63 closed out — a net gain of 45 holders — while 361 added to existing stakes and 314 trimmed.

The largest buyer was Nuveen, adding an estimated $214M. The largest seller was Capital International Investors, cutting an estimated $710M.

  • 903 institutional investors held CoStar Group (CSGP) as of Q3 2025, up from 871 in Q2 2025.
  • Funds reported $34.9B of CoStar Group stock for Q3 2025, up 2% quarter-over-quarter.
  • 108 funds opened new CoStar Group positions in Q3 2025 and 63 closed out, a net change of +45 holders.
  • The largest CoStar Group buyer in Q3 2025 was Nuveen, an estimated $214M added.
  • The largest CoStar Group seller in Q3 2025 was Capital International Investors, an estimated $710M sold.

Based on aggregated 13F filings for Q3 2025.