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.
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)
Top Buyers
| 1 |
N
Nuveen
Charlotte,
North Carolina
|
+$214M |
| 2 |
Janus Henderson Group
London,
United Kingdom
|
+$193M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$150M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$107M |
| 5 |
Morgan Stanley
New York
|
+$100M |
Top Sellers
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.