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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 %
American Century Companies
51
American Century Companies
Missouri
$1.48M +$97.9K +4,892 +7%
SEI Investments
52
SEI Investments
Pennsylvania
$1.46M +$632K +31,568 +76%
Envestnet Asset Management
53
Envestnet Asset Management
Illinois
$1.4M -$71.5K -3,573 -5%
Two Sigma Advisers
54
Two Sigma Advisers
New York
$1.39M +$1.16M +57,700 +502%
GCM
55
Graham Capital Management
Connecticut
$1.37M +$535K +26,709 +64%
UBS AM
56
UBS AM
Illinois
$1.36M +$40.3K +2,013 +3%
GCP
57
GSA Capital Partners
United Kingdom
$1.34M -$73.2K -3,658 -5%
Deutsche Bank
58
Deutsche Bank
Germany
$1.31M -$42.6K -2,130 -3%
Citigroup
59
Citigroup
New York
$1.26M +$428K +21,374 +52%
SSA
60
Schonfeld Strategic Advisors
New York
$1.19M +$888K +44,371 +290%
JCIA
61
Jackson Creek Investment Advisors
Colorado
$1.14M +$1.14M +57,094 New
Swiss National Bank
62
Swiss National Bank
Switzerland
$1.09M +$60.1K +3,000 +6%
EGM
63
Engineers Gate Manager
New York
$1.06M +$685K +34,201 +183%
DFCM
64
Dark Forest Capital Management
Puerto Rico
$1.04M +$1.04M +51,855 New
UBS Group
65
UBS Group
Switzerland
$976K -$15.3M -763,841 -94%
CCIA
66
Campbell & Co Investment Adviser
Maryland
$918K -$9.43K -471 -1%
BNP Paribas Financial Markets
67
BNP Paribas Financial Markets
France
$906K -$4.08M -203,898 -82%
Barclays
68
Barclays
United Kingdom
$857K -$124K -6,198 -13%
TW
69
TritonPoint Wealth
Maryland
$834K -$100K -5,000 -11%
RhumbLine Advisers
70
RhumbLine Advisers
Massachusetts
$784K -$14.1K -706 -2%
NRD
71
Nebula Research & Development
New York
$753K +$219K +10,943 +41%
AICPI
72
ABG Innovation Capital Partners III
Hong Kong
$736K – – –
Susquehanna International Group
73
Susquehanna International Group
Pennsylvania
$719K +$370K +18,467 +106%
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
74
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$717K – – –
Los Angeles Capital Management
75
Los Angeles Capital Management
California
$680K +$680K +33,970 New
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