CoStar Group
CSGP
847 hedge funds and large institutions have $28.4B invested in CoStar Group in 2025 Q4 according to their latest regulatory filings, with 103 funds opening new positions, 273 increasing their positions, 388 reducing their positions, and 143 closing their positions.
86% more call options, than puts
Call options by funds: $207M | Put options by funds: $111M
2.11% more ownership
Funds ownership: 97.63% → 99.73% (+2.1%)
6% less funds holding
Funds holding: 905 → 847 (-58)
18% less capital invested
Capital invested by funds: $34.9B → $28.4B (-$6.45B)
28% less first-time investments, than exits
New positions opened: 103 | Existing positions closed: 143
30% less repeat investments, than reductions
Existing positions increased: 273 | Existing positions reduced: 388
32% less funds holding in top 10
Funds holding in top 10: 25 → 17 (-8)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
+$735M |
| 2 |
Baillie Gifford & Co
Edinburgh,
United Kingdom
|
+$332M |
| 3 |
Capital International Investors
Los Angeles,
California
|
+$287M |
| 4 |
Goldman Sachs
New York
|
+$110M |
| 5 |
JAM
Jupiter Asset Management
London,
United Kingdom
|
+$105M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$301M |
| 2 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$297M |
| 3 |
Morgan Stanley
New York
|
-$230M |
| 4 |
Franklin Resources
San Mateo,
California
|
-$182M |
| 5 |
UBS Group
Zurich,
Switzerland
|
-$177M |
CSGP Hedge Fund Activity: Q4 2025 in Review
847 of the 8,266 institutional investors tracked by Wall St. Rank reported a position in CoStar Group (CSGP) for Q4 2025, worth a combined $28.4B — down 18% from $34.9B a quarter earlier.
Sellers outnumbered buyers: 143 funds closed out of CSGP and 103 opened new positions — a net loss of 40 holders — while 388 trimmed existing stakes and 273 added.
The largest buyer was Invesco, adding an estimated $735M. The largest seller was Massachusetts Financial Services, cutting an estimated $301M.
- 847 institutional investors held CoStar Group (CSGP) as of Q4 2025, down from 905 in Q3 2025.
- Funds reported $28.4B of CoStar Group stock for Q4 2025, down 18% quarter-over-quarter.
- 103 funds opened new CoStar Group positions in Q4 2025 and 143 closed out, a net change of -40 holders.
- The largest CoStar Group buyer in Q4 2025 was Invesco, an estimated $735M added.
- The largest CoStar Group seller in Q4 2025 was Massachusetts Financial Services, an estimated $301M sold.
Based on aggregated 13F filings for Q4 2025.