CoStar Group
CSGP
755 hedge funds and large institutions have $12.4B invested in CoStar Group in 2026 Q2 according to their latest regulatory filings, with 113 funds opening new positions, 301 increasing their positions, 264 reducing their positions, and 143 closing their positions.
145% more call options, than puts
Call options by funds: $81.7M | Put options by funds: $33.3M
14% more repeat investments, than reductions
Existing positions increased: 301 | Existing positions reduced: 264
6.82% more ownership
Funds ownership: 99.08% → 105.9% (+6.8%)
5% less funds holding
Funds holding: 796 → 755 (-41)
21% less first-time investments, than exits
New positions opened: 113 | Existing positions closed: 143
26% less capital invested
Capital invested by funds: $16.8B → $12.4B (-$4.4B)
29% less funds holding in top 10
Funds holding in top 10: 7 → 5 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
California State Teachers Retirement System (CalSTRS)
West Sacramento,
California
|
+$640M |
| 2 |
AQR Capital Management
Greenwich,
Connecticut
|
+$247M |
| 3 |
EIG
EdgePoint Investment Group
Toronto,
Ontario, Canada
|
+$205M |
| 4 |
BAMCO Inc
New York
|
+$183M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$111M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Principal Financial Group
Des Moines,
Iowa
|
-$478M |
| 2 |
Invesco
Atlanta,
Georgia
|
-$314M |
| 3 |
D.E. Shaw & Co
New York
|
-$167M |
| 4 |
Goldman Sachs
New York
|
-$142M |
| 5 |
Polen Capital Management
Boca Raton,
Florida
|
-$131M |
CSGP Hedge Fund Activity: Q2 2026 in Review
755 of the 8,280 institutional investors tracked by Wall St. Rank reported a position in CoStar Group (CSGP) for Q2 2026, worth a combined $12.4B — down 26% from $16.8B a quarter earlier.
Sellers outnumbered buyers: 143 funds closed out of CSGP and 113 opened new positions — a net loss of 30 holders — while 264 trimmed existing stakes and 301 added.
The largest buyer was California State Teachers Retirement System (CalSTRS), adding an estimated $640M. The largest seller was Principal Financial Group, cutting an estimated $478M.
- 755 institutional investors held CoStar Group (CSGP) as of Q2 2026, down from 796 in Q1 2026.
- Funds reported $12.4B of CoStar Group stock for Q2 2026, down 26% quarter-over-quarter.
- 113 funds opened new CoStar Group positions in Q2 2026 and 143 closed out, a net change of -30 holders.
- The largest CoStar Group buyer in Q2 2026 was California State Teachers Retirement System (CalSTRS), an estimated $640M added.
- The largest CoStar Group seller in Q2 2026 was Principal Financial Group, an estimated $478M sold.
Based on aggregated 13F filings for Q2 2026.