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Castle Biosciences
CSTL

Overview Fund Activity

180 hedge funds and large institutions have $516M invested in Castle Biosciences in 2025 Q1 according to their latest regulatory filings, with 30 funds opening new positions, 76 increasing their positions, 54 reducing their positions, and 43 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
180
Holders Change
-17
Holders Change %
-8.63%
% of All Funds
2.45%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
30
Increased
76
Reduced
54
Closed
43
Calls
$200K
Puts
$112K
Net Calls
+$88K
Net Calls Change
-$2.62M

Top Buyers

1
Schroder Investment Management Group
1
Schroder Investment Management Group
United Kingdom
$11.9M
2
PWAM
2
Park West Asset Management
California
$11.1M
3
PCM
3
Portolan Capital Management
Massachusetts
$25.3M
4
B
4
Braidwell
Connecticut
$7.31M
5
Allianz Asset Management
5
Allianz Asset Management
Germany
$12.8M

Top Sellers

1
WA
1
Wasatch Advisors
Utah
$20M
2
UBS Group
2
UBS Group
Switzerland
$976K
3
Citadel Advisors
3
Citadel Advisors
Florida
$5.17M
4
BG
4
Bellevue Group
Switzerland
$6.03M
5
SCM
5
Soleus Capital Management
Connecticut
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
Creative Planning
126
Creative Planning
Kansas
$222K +$31.2K +1,560 +16%
Canada Life
127
Canada Life
Manitoba, Canada
$215K – – –
Teacher Retirement System of Texas
128
Teacher Retirement System of Texas
Texas
$208K +$18.2K +908 +10%
Lido Advisors
129
Lido Advisors
California
$201K -$9.87K -493 -5%
Royal Bank of Canada
130
Royal Bank of Canada
Ontario, Canada
$182K +$3.83K +191 +2%
A
131
AlphaQuest
New York
$120K -$84.5K -4,223 -41%
PFSRSONJ
132
Police & Firemen's Retirement System of New Jersey
New Jersey
$117K – – –
CUAMC
133
China Universal Asset Management Company
China
$114K -$4.4K -220 -4%
Lazard Asset Management
134
Lazard Asset Management
New York
$98K +$98K +4,928 New
KK
135
KLP Kapitalforvaltning
Norway
$96.1K – – –
Carson Wealth (CWM LLC)
136
Carson Wealth (CWM LLC)
Nebraska
$83K +$74.1K +3,699 +835%
AssetMark Inc
137
AssetMark Inc
California
$79.7K -$8.65K -432 -10%
Amundi
138
Amundi
France
$79.4K +$78.9K +4,111 +15,812%
CMBA
139
C.M. Bidwell & Associates
Hawaii
$63.7K +$9.65K +482 +18%
HI
140
Harbour Investments
Wisconsin
$50.1K +$50.1K +2,500 New
AIP
141
Ameritas Investment Partners
Nebraska
$49K – – –
Canada Pension Plan Investment Board
142
Canada Pension Plan Investment Board
Ontario, Canada
$48K +$30K +1,500 +167%
FHA
143
First Horizon Advisors
Tennessee
$36.2K -$4K -200 -10%
PD
144
Point72 (DIFC)
United Arab Emirates
$35.5K +$10.8K +539 +44%
C
145
Covestor
United Kingdom
$24K +$5.57K +283 +30%
Fidelity Investments
146
Fidelity Investments
Massachusetts
$23.1K +$1.5K +75 +7%
Mirae Asset Global Investments
147
Mirae Asset Global Investments
South Korea
$18.6K -$20 -1 -0.1%
AIM
148
Arcadia Investment Management
Michigan
$18.1K – – –
AB
149
Amalgamated Bank
New York
$18K +$1.21K +60 +7%
TRCT
150
Tower Research Capital (TRC)
New York
$15.7K -$210K -10,483 -93%
4 5
6
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