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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
SI
301
Stephens Inc
Arkansas
$1.72M +$715K +13,732 +47%
Nisa Investment Advisors
302
Nisa Investment Advisors
Missouri
$1.72M +$477K +9,162 +27%
ECSS
303
Eurizon Capital SGR SpA
$1.7M -$1.16M -22,239 -35%
SOADOR
304
State of Alaska Department of Revenue
Alaska
$1.69M
KIA
305
Knollwood Investment Advisory
Maryland
$1.69M
RFC
306
Regions Financial Corp
Alabama
$1.67M -$750K -14,413 -26%
EF
307
Empowered Funds
Pennsylvania
$1.65M +$1.64M +31,446 +330%
OBC
308
Oakum Bay Capital
Connecticut
$1.65M +$1.85M +35,465 +645%
Arrowstreet Capital
309
Arrowstreet Capital
Massachusetts
$1.65M +$2.13M +40,911 New
NB
310
Norinchukin Bank
Japan
$1.64M +$70K +1,344 +3%
AI
311
Atom Investors
Texas
$1.63M +$1.9M +36,439 +920%
NG
312
Norden Group
Utah
$1.59M +$1.51M +29,011 +279%
Macquarie Group
313
Macquarie Group
Australia
$1.57M -$1.6M -30,702 -44%
ET
314
Entropy Technologies
New York
$1.56M +$1.33M +25,532 +195%
Pathstone Holdings
315
Pathstone Holdings
New Jersey
$1.56M +$730K +14,019 +57%
Wealth Enhancement Advisory Services
316
Wealth Enhancement Advisory Services
Minnesota
$1.54M +$888K +17,062 +79%
RSC
317
Red Spruce Capital
Pennsylvania
$1.53M +$840K +16,137 +74%
PWG
318
Portside Wealth Group
Utah
$1.51M +$957K +18,380 +96%
SA
319
Sanctuary Advisors
Indiana
$1.5M +$678K +13,029 +54%
BPWM
320
Badgley Phelps Wealth Managers
Washington
$1.5M -$6.72M -129,159 -78%
Cambridge Investment Research Advisors
321
Cambridge Investment Research Advisors
Iowa
$1.49M -$53.1K -1,020 -3%
FAMI
322
Fideuram Asset Management (Ireland)
$1.48M +$1.17M +22,563 +2,388%
Thrivent Financial for Lutherans
323
Thrivent Financial for Lutherans
Minnesota
$1.46M -$4.44M -85,244 -70%
SAM
324
Storebrand Asset Management
Norway
$1.46M -$2.17M -41,654 -54%
HT
325
Headlands Technologies
Illinois
$1.43M +$1.84M +35,428 New