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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
Tiger Global Management
26
Tiger Global Management
New York
$274M – – –
William Blair & Company
27
William Blair & Company
Illinois
$264M +$22.7M +257,311 +9%
TP
28
Third Point
New York
$255M -$6.01M -68,000 -2%
Amundi
29
Amundi
France
$254M -$5.61M -63,439 -2%
Legal & General Group
30
Legal & General Group
United Kingdom
$228M +$17.3M +195,200 +8%
Charles Schwab
31
Charles Schwab
California
$224M -$38.5M -435,519 -14%
Brown Advisory
32
Brown Advisory
Maryland
$208M -$18.7M -211,270 -8%
UBS AM
33
UBS AM
Illinois
$208M -$46.1M -522,088 -18%
BNP Paribas Asset Management
34
BNP Paribas Asset Management
France
$206M +$15.2M +172,176 +8%
Dimensional Fund Advisors
35
Dimensional Fund Advisors
Texas
$189M +$5.94M +67,262 +3%
Goldman Sachs
36
Goldman Sachs
New York
$185M +$1.06M +12,031 +0.6%
DDC
37
DF Dent & Co
Maryland
$184M -$8.19M -92,646 -4%
Fayez Sarofim & Co
38
Fayez Sarofim & Co
Texas
$183M +$1.56M +17,666 +0.8%
RC
39
RGM Capital
Florida
$177M -$2.65M -30,000 -1%
JP Morgan Chase
40
JP Morgan Chase
New York
$162M -$33M -373,986 -16%
Viking Global Investors
41
Viking Global Investors
Connecticut
$156M -$121M -1,368,839 -43%
VOYA Investment Management
42
VOYA Investment Management
Georgia
$156M +$54.3M +614,515 +50%
CIBC Private Wealth Group
43
CIBC Private Wealth Group
Georgia
$154M -$1.17M -13,189 -0.7%
Citadel Advisors
44
Citadel Advisors
Florida
$146M +$150M +1,695,175 +5,391%
BMO
45
Beck Mack & Oliver
New York
$145M -$284K -3,214 -0.2%
Envestnet Asset Management
46
Envestnet Asset Management
Illinois
$144M -$2.66M -30,088 -2%
RP
47
Riverbridge Partners
Minnesota
$140M -$8.38M -94,835 -5%
Mackenzie Financial
48
Mackenzie Financial
Ontario, Canada
$139M -$19.2M -217,789 -12%
Fidelity Investments
49
Fidelity Investments
Massachusetts
$133M +$25.1M +284,277 +22%
Federated Hermes
50
Federated Hermes
Pennsylvania
$123M -$619K -6,999 -0.5%
1
2
3 4 5

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.