CoStar Group
CSGP
858 hedge funds and large institutions have $34B invested in CoStar Group in 2025 Q1 according to their latest regulatory filings, with 139 funds opening new positions, 378 increasing their positions, 264 reducing their positions, and 76 closing their positions.
183% more call options, than puts
Call options by funds: $337M | Put options by funds: $119M
83% more first-time investments, than exits
New positions opened: 139 | Existing positions closed: 76
44% more funds holding in top 10
Funds holding in top 10: 16 → 23 (+7)
43% more repeat investments, than reductions
Existing positions increased: 378 | Existing positions reduced: 264
18% more capital invested
Capital invested by funds: $28.9B → $34B (+$5.07B)
6% more funds holding
Funds holding: 806 → 858 (+52)
3.28% more ownership
Funds ownership: 98.4% → 101.68% (+3.3%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MMA
Mizuho Markets Americas
New York
|
+$563M |
| 2 |
Morgan Stanley
New York
|
+$272M |
| 3 |
TCIM
TOMS Capital Investment Management
New York
|
+$267M |
| 4 |
UBS Group
Zurich,
Switzerland
|
+$246M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$206M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Macquarie Group
Sydney, NSW 2000,
Australia
|
-$87.5M |
| 2 |
Viking Global Investors
Stamford,
Connecticut
|
-$83.2M |
| 3 |
Goldman Sachs
New York
|
-$55.5M |
| 4 |
SCM
Spyglass Capital Management
San Francisco,
California
|
-$55.2M |
| 5 |
Canada Pension Plan Investment Board
Toronto Ontario,
Ontario, Canada
|
-$50.4M |
CSGP Hedge Fund Activity: Q1 2025 in Review
858 of the 7,471 institutional investors tracked by Wall St. Rank reported a position in CoStar Group (CSGP) for Q1 2025, worth a combined $34B — up 18% from $28.9B a quarter earlier.
Buyers outnumbered sellers: 139 funds opened new CSGP positions and 76 closed out — a net gain of 63 holders — while 378 added to existing stakes and 264 trimmed.
The largest buyer was Mizuho Markets Americas, opening a new position worth an estimated $563M. The largest seller was Macquarie Group, cutting an estimated $87.5M.
- 858 institutional investors held CoStar Group (CSGP) as of Q1 2025, up from 806 in Q4 2024.
- Funds reported $34B of CoStar Group stock for Q1 2025, up 18% quarter-over-quarter.
- 139 funds opened new CoStar Group positions in Q1 2025 and 76 closed out, a net change of +63 holders.
- The largest CoStar Group buyer in Q1 2025 was Mizuho Markets Americas, an estimated $563M added.
- The largest CoStar Group seller in Q1 2025 was Macquarie Group, an estimated $87.5M sold.
Based on aggregated 13F filings for Q1 2025.