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CoStar Group

791 hedge funds and large institutions have $16.4B invested in CoStar Group in 2026 Q1 according to their latest regulatory filings, with 125 funds opening new positions, 307 increasing their positions, 276 reducing their positions, and 164 closing their positions.

New
Increased
Maintained
Reduced
Closed

262% more call options, than puts

Call options by funds: $142M | Put options by funds: $39.3M

11% more repeat investments, than reductions

Existing positions increased: 307 | Existing positions reduced: 276

0.54% less ownership

Funds ownership: 97.52%96.98% (-0.54%)

7% less funds holding

Funds holding: 846791 (-55)

24% less first-time investments, than exits

New positions opened: 125 | Existing positions closed: 164

41% less capital invested

Capital invested by funds: $27.8B → $16.4B (-$11.3B)

59% less funds holding in top 10

Funds holding in top 10: 177 (-10)

Holders
791
Holders Change
-55
Holders Change %
-6.5%
% of All Funds
9.74%
Holding in Top 10
7
Holding in Top 10 Change
-10
Holding in Top 10 Change %
-58.82%
% of All Funds
0.09%
New
125
Increased
307
Reduced
276
Closed
164
Calls
$142M
Puts
$39.3M
Net Calls
+$103M
Net Calls Change
+$7.38M
Name Holding Trade Value Shares
Change
Change in
Stake
Caisse de Depot et Placement du Quebec (CDPQ)
801
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
-$39.5M -587,098 Closed
IFM
802
ION Fund Management
-$31M -461,000 Closed
ClearBridge Investments
803
ClearBridge Investments
New York
-$25.7M -382,138 Closed
LGF
804
LGT Group Foundation
Liechtenstein
-$23.6M -347,732 Closed
CI Investments Inc
805
CI Investments Inc
Ontario, Canada
-$23.1M -343,534 Closed
AAM
806
Aureus Asset Management
Massachusetts
-$22.7M -337,117 Closed
UM
807
Ulysses Management
New York
-$22.2M -330,500 Closed
Parnassus Investments
808
Parnassus Investments
California
-$18.3M -272,688 Closed
TCP
809
ThornTree Capital Partners
Massachusetts
-$16.3M -242,032 Closed
NSGL
810
No Street GP LP
California
-$16.1M -239,999 Closed
TCM
811
Tran Capital Management
California
-$15.7M -233,303 Closed
QCMNJ
812
Quantum Capital Management (New Jersey)
New Jersey
-$14.7M -218,583 Closed
NP
813
NS Partners
United Kingdom
-$14.5M -214,981 Closed
VG
814
Visualize Group
New York
-$14.4M -214,388 Closed
FGP
815
Freestone Grove Partners
California
-$13.5M -201,205 Closed
Jennison Associates
816
Jennison Associates
New York
-$11.1M -164,960 Closed
CC
817
Clearline Capital
New York
-$7.94M -118,041 Closed
FAM
818
Fred Alger Management
New York
-$7.55M -112,357 Closed
2
819
2Xideas
Switzerland
-$7.28M -108,267 Closed
KLWA
820
Kelly Lawrence W & Associates
California
-$7.15M -106,284 Closed
GC
821
Greenvale Capital
United Kingdom
-$6.72M -100,000 Closed
ACIM
822
Azimuth Capital Investment Management
Michigan
-$6.32M -94,063 Closed
ET
823
Equitable Trust
Tennessee
-$6.29M -93,581 Closed
FAF
824
Första AP-fonden
Sweden
-$5.54M -82,400 Closed
Skandinaviska Enskilda Banken (SEB)
825
Skandinaviska Enskilda Banken (SEB)
Sweden
-$5.46M -81,263 Closed