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Prothena Corp
PRTA

Overview Fund Activity

187 hedge funds and large institutions have $254M invested in Prothena Corp in 2025 Q2 according to their latest regulatory filings, with 52 funds opening new positions, 54 increasing their positions, 41 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
187
Holders Change
+28
Holders Change %
+17.61%
% of All Funds
2.51%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.04%
New
52
Increased
54
Reduced
41
Closed
22
Calls
$6.7M
Puts
$6.34M
Net Calls
+$359K
Net Calls Change
-$1.89M

Top Buyers

1
ACM
1
ADAR1 Capital Management
Texas
$20.5M
2
Citadel Advisors
2
Citadel Advisors
Florida
$6.97M
3
Acadian Asset Management
3
Acadian Asset Management
Massachusetts
$6.18M
4
Vanguard Group
4
Vanguard Group
Pennsylvania
$13.2M
5
RC
5
Rangeley Capital
Connecticut
$4.34M

Top Sellers

1
EC
1
EcoR1 Capital
California
$0
2
Wellington Management Group
2
Wellington Management Group
Massachusetts
$655K
3
T. Rowe Price Associates
3
T. Rowe Price Associates
Maryland
$432K
4
SL
4
Siren LLC
Connecticut
$0
5
BCM
5
Boxer Capital Management
California
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
Raymond James Financial
126
Raymond James Financial
Florida
$81.9K +$6.13K +1,009 +8%
TRCT
127
Tower Research Capital (TRC)
New York
$77.1K +$65.6K +10,815 +571%
CSP
128
Cary Street Partners
Virginia
$75.9K – – –
VOYA Investment Management
129
VOYA Investment Management
Georgia
$72.2K +$1.29K +212 +2%
Commonwealth Equity Services
130
Commonwealth Equity Services
Massachusetts
$72K -$9.14K -1,500 -11%
TSS
131
Two Sigma Securities
New York
$70.9K +$70.9K +11,683 New
CBA
132
Coastal Bridge Advisors
Connecticut
$69.4K +$69.4K +11,433 New
BIG
133
Brooklyn Investment Group
New York
$67.5K +$56.8K +9,359 +534%
CUAMC
134
China Universal Asset Management Company
China
$65.6K +$85 +14 +0.1%
CAM
135
Cresset Asset Management
Illinois
$62.6K -$17.1K -2,811 -21%
PFSRSONJ
136
Police & Firemen's Retirement System of New Jersey
New Jersey
$61.4K – – –
PFS
137
Prospera Financial Services
Texas
$60.7K +$60.7K +10,000 New
Legal & General Group
138
Legal & General Group
United Kingdom
$56.6K -$194K -32,031 -77%
New York State Common Retirement Fund
139
New York State Common Retirement Fund
New York
$55K -$32.5K -5,300 -37%
US Bancorp
140
US Bancorp
Minnesota
$54.8K +$51.7K +8,519 +1,664%
KK
141
KLP Kapitalforvaltning
Norway
$40.7K – – –
Public Employees Retirement Association of Colorado
142
Public Employees Retirement Association of Colorado
Colorado
$40K – – –
BBHC
143
Brown Brothers Harriman & Co
New York
$30.4K +$30.4K +5,000 New
AIP
144
Ameritas Investment Partners
Nebraska
$26.5K – – –
S
145
SignatureFD
Georgia
$20.4K +$18.2K +2,997 +833%
FFA
146
Farther Finance Advisors
California
$14.9K +$9.04K +1,490 +154%
Mirae Asset Global Investments
147
Mirae Asset Global Investments
South Korea
$12.6K +$1.69K +278 +15%
Walleye Capital
148
Walleye Capital
New York
$12.5K +$12.5K +2,058 New
VCM
149
Versant Capital Management
Arizona
$12.4K +$9.18K +1,513 +285%
HWM
150
HighMark Wealth Management
Minnesota
$12.2K – – –
4 5
6
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