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Prothena Corp
PRTA

Overview Fund Activity

159 hedge funds and large institutions have $647M invested in Prothena Corp in 2025 Q1 according to their latest regulatory filings, with 17 funds opening new positions, 42 increasing their positions, 58 reducing their positions, and 25 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
159
Holders Change
-10
Holders Change %
-5.92%
% of All Funds
2.16%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
17
Increased
42
Reduced
58
Closed
25
Calls
$3.5M
Puts
$1.25M
Net Calls
+$2.25M
Net Calls Change
-$2.23M

Top Buyers

1
Nordea Investment Management
Nordea Investment Management
Sweden
+$3.74M
2
SL
Siren LLC
Connecticut
+$2.27M
3
DA
DCF Advisers
Connecticut
+$1.13M
4
Jane Street
Jane Street
New York
+$954K
5
Wellington Management Group
Wellington Management Group
Massachusetts
+$850K

Top Sellers

1
State Street
State Street
Massachusetts
-$4.21M
2
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
-$2.84M
3
Federated Hermes
Federated Hermes
Pennsylvania
-$2.47M
4
RSCM
Rock Springs Capital Management
Maryland
-$1.88M
5
Axa
Axa
France
-$1.67M
Name Holding Trade Value Shares
Change 		Shares
Change %
ACM
126
Aster Capital Management
United Arab Emirates
$3.59K -$964 -61 -21%
SW
127
SVB Wealth
Massachusetts
$3.39K +$3.39K +274 New
MCM
128
Manchester Capital Management
Vermont
$3.09K – – –
CIAM
129
Caitong International Asset Management
Hong Kong
$2.95K +$1.52K +123 +107%
SWM
130
Spire Wealth Management
Virginia
$2.48K +$2.48K +200 New
ADL
131
Asset Dedication LLC
California
$2.28K – – –
Daiwa Securities Group
132
Daiwa Securities Group
Japan
$2K – – –
Osaic Holdings
133
Osaic Holdings
Arizona
$1.99K -$1.21K -98 -38%
NC
134
North Capital
Utah
$1.97K +$1.97K +159 New
SN
135
Sittner & Nelson
Oregon
$1.92K – – –
IA
136
IFP Advisors
Florida
$1.63K – – –
AFG
137
Albion Financial Group
Utah
$1.55K – – –
MPWT
138
MassMutual Private Wealth & Trust
Connecticut
$1.39K +$1.14K +92 +460%
HIA
139
Harbor Investment Advisory
Maryland
$1.24K – – –
GC
140
Gould Capital
Washington
$1.24K – – –
CFO
141
CVA Family Office
Colorado
$891 – – –
PA
142
Parallel Advisors
California
$866 – – –
TC
143
Truvestments Capital
Florida
$842 – – –
CCM
144
Coldstream Capital Management
Washington
$632 +$632 +51 New
RIL
145
Rothschild Investment LLC
Illinois
$557 +$124 +10 +29%
LFG
146
Larson Financial Group
Missouri
$520 +$136 +11 +35%
CIBC Private Wealth Group
147
CIBC Private Wealth Group
Georgia
$514 – – –
AF
148
Allworth Financial
California
$454 +$251 +26 +124%
PFBT
149
Parkside Financial Bank & Trust
Missouri
$372 +$372 +30 New
CA
150
CoreCap Advisors
Michigan
$285 – – –
4 5
6
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