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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 %
BlackRock
1
BlackRock
New York
$59.7M +$1.25M +62,231 +2%
Vanguard Group
2
Vanguard Group
Pennsylvania
$41M +$4.3M +215,030 +12%
Principal Financial Group
3
Principal Financial Group
Iowa
$29.4M +$645K +32,208 +2%
PCM
4
Portolan Capital Management
Massachusetts
$25.3M +$9.78M +488,644 +63%
Dimensional Fund Advisors
5
Dimensional Fund Advisors
Texas
$24M +$4.02M +200,756 +20%
WA
6
Wasatch Advisors
Utah
$20M -$16M -797,633 -44%
Wellington Management Group
7
Wellington Management Group
Massachusetts
$16.6M +$2.13M +106,408 +15%
State Street
8
State Street
Massachusetts
$14.3M +$96.4K +4,816 +0.7%
Renaissance Technologies
9
Renaissance Technologies
New York
$14M +$324K +16,200 +2%
Acadian Asset Management
10
Acadian Asset Management
Massachusetts
$13.5M +$5.35M +267,416 +65%
Geode Capital Management
11
Geode Capital Management
Massachusetts
$13M +$434K +21,657 +3%
Allianz Asset Management
12
Allianz Asset Management
Germany
$12.8M +$6.35M +317,103 +98%
Schroder Investment Management Group
13
Schroder Investment Management Group
United Kingdom
$11.9M +$11.9M +597,089 New
NL
14
Nuveen LLC
North Carolina
$11.9M +$11.9M +671,811 New
PWAM
15
Park West Asset Management
California
$11.1M +$11.1M +556,485 New
PCM
16
Palisade Capital Management
New Jersey
$9.81M -$270K -13,474 -3%
Bank of America
17
Bank of America
North Carolina
$7.52M -$564K -28,173 -7%
B
18
Braidwell
Connecticut
$7.31M +$7.31M +365,247 New
PHP
19
Parkman Healthcare Partners
Connecticut
$7.02M +$919K +45,922 +15%
Ameriprise
20
Ameriprise
Minnesota
$6.52M +$193K +9,661 +3%
BG
21
Bellevue Group
Switzerland
$6.03M -$8.91M -444,879 -60%
Qube Research & Technologies (QRT)
22
Qube Research & Technologies (QRT)
United Kingdom
$5.59M +$1.24M +61,820 +28%
KCM
23
Kornitzer Capital Management
Kansas
$5.57M -$2.12M -105,660 -28%
Northern Trust
24
Northern Trust
Illinois
$5.47M -$223K -11,118 -4%
Citadel Advisors
25
Citadel Advisors
Florida
$5.17M -$11.5M -576,130 -69%
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