CoStar Group
CSGP
907 hedge funds and large institutions have $34.9B invested in CoStar Group in 2025 Q3 according to their latest regulatory filings, with 109 funds opening new positions, 363 increasing their positions, 314 reducing their positions, and 63 closing their positions.
144% more call options, than puts
Call options by funds: $199M | Put options by funds: $81.5M
73% more first-time investments, than exits
New positions opened: 109 | Existing positions closed: 63
16% more repeat investments, than reductions
Existing positions increased: 363 | Existing positions reduced: 314
4% more funds holding
Funds holding: 874 → 907 (+33)
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)
31% less capital inflows, than outflows
Capital inflows: $2.03B | Capital outflows: $2.95B
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Nuveen
Charlotte,
North Carolina
|
+$214M |
| 2 |
Janus Henderson Group
London,
|
+$193M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$150M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$107M |
| 5 |
Morgan Stanley
New York
|
+$100M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital International Investors
Los Angeles,
California
|
-$710M |
| 2 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
-$264M |
| 3 |
Bank of America
Charlotte,
North Carolina
|
-$126M |
| 4 |
Viking Global Investors
Stamford,
Connecticut
|
-$121M |
| 5 |
SG Capital Management
Chicago,
Illinois
|
-$74.7M |
CSGP Hedge Fund Activity: Q3 2025 in Review
907 of the 7,649 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: 109 funds opened new CSGP positions and 63 closed out — a net gain of 46 holders — while 363 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.
- 907 institutional investors held CoStar Group (CSGP) as of Q3 2025, up from 874 in Q2 2025.
- Funds reported $34.9B of CoStar Group stock for Q3 2025, up 2% quarter-over-quarter.
- 109 funds opened new CoStar Group positions in Q3 2025 and 63 closed out, a net change of +46 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.