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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 %
KFI
151
Key Financial Inc
Pennsylvania
$148 – – –
LWA
152
Lowe Wealth Advisors
Maryland
$124 – – –
SAM
153
Smartleaf Asset Management
Massachusetts
$118 +$118 +9 New
CA
154
Clearstead Advisors
Ohio
$50 – – –
VWM
155
Valley Wealth Managers
New Jersey
$37 – – –
WTC
156
WhitTier Trust Company
Nevada
$37 – – –
HI
157
Harbour Investments
Wisconsin
$37 +$25 +2 +200%
CIAS
158
CBIZ Investment Advisory Services
Ohio
$25 – – –
Axa
159
Axa
France
– -$1.67M -120,630 Closed
BFM
160
Boothbay Fund Management
New York
– -$859K -62,002 Closed
Norges Bank
161
Norges Bank
Norway
– -$796K -57,454 Closed
Verition Fund Management
162
Verition Fund Management
Connecticut
– -$546K -39,422 Closed
Balyasny Asset Management
163
Balyasny Asset Management
Illinois
– -$527K -38,021 Closed
Tudor Investment Corp
164
Tudor Investment Corp
Connecticut
– -$379K -27,398 Closed
CM
165
Caption Management
Oklahoma
– -$332K -24,000 Closed
XT
166
XTX Topco
Cayman Islands
– -$259K -18,665 Closed
PA
167
Profund Advisors
Maryland
– -$211K -15,212 Closed
Schroder Investment Management Group
168
Schroder Investment Management Group
United Kingdom
– -$223K -15,000 Closed
Walleye Capital
169
Walleye Capital
New York
– -$207K -14,953 Closed
Wolverine Trading
170
Wolverine Trading
Illinois
– -$166K -11,162 Closed
Teacher Retirement System of Texas
171
Teacher Retirement System of Texas
Texas
– -$145K -10,434 Closed
ASRS
172
Arizona State Retirement System
Arizona
– -$140K -10,136 Closed
HT
173
Headlands Technologies
Illinois
– -$102K -7,330 Closed
VEA
174
Virtus ETF Advisers
New York
– -$71.3K -5,148 Closed
Group One Trading
175
Group One Trading
Illinois
– -$66.8K -4,824 Closed
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