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Prothena Corp
PRTA

Overview Fund Activity

187 hedge funds and large institutions have $1.97B invested in Prothena Corp in 2023 Q4 according to their latest regulatory filings, with 41 funds opening new positions, 68 increasing their positions, 46 reducing their positions, and 38 closing their positions.

Holders
187
Holders Change
+1
Holders Change %
+0.54%
% of All Funds
2.74%
Holding in Top 10
3
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-40%
% of All Funds
0.04%
New
41
Increased
68
Reduced
46
Closed
38
Calls
$81.9M
Puts
$62.6M
Net Calls
+$19.3M
Net Calls Change
+$27.7M

Top Buyers

1
Morgan Stanley
1
Morgan Stanley
New York
$35.1M
2
State Street
2
State Street
Massachusetts
$100M
3
AG
3
Artal Group
Luxembourg
$18.2M
4
Wellington Management Group
4
Wellington Management Group
Massachusetts
$94.3M
5
T. Rowe Price Associates
5
T. Rowe Price Associates
Maryland
$154M

Top Sellers

1
T. Rowe Price Investment Management
1
T. Rowe Price Investment Management
Maryland
$0
2
PHS
2
PFM Health Sciences
California
$6.9M
3
APM
3
Avidity Partners Management
Texas
$0
4
FLAM
4
First Light Asset Management
Minnesota
$39.6M
5
Point72 Asset Management
5
Point72 Asset Management
Connecticut
$0
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$421M 11,584,280 – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$293M 8,049,796 +19,506 +0.2%
T. Rowe Price Associates
3
T. Rowe Price Associates
Maryland
$154M 4,237,351 +417,338 +11%
BlackRock
4
BlackRock
New York
$137M 3,770,650 +229,406 +6%
State Street
5
State Street
Massachusetts
$100M 2,758,564 +648,331 +31%
Wellington Management Group
6
Wellington Management Group
Massachusetts
$94.3M 2,594,102 +452,455 +21%
Janus Henderson Group
7
Janus Henderson Group
United Kingdom
$74M 2,035,984 +209,375 +11%
PAI
8
Palo Alto Investors
California
$60.3M 1,660,057 +2,599 +0.2%
FLAM
9
First Light Asset Management
Minnesota
$39.6M 1,088,801 -405,238 -27%
Vanguard Group
10
Vanguard Group
Pennsylvania
$38.9M 1,070,555 +39,781 +4%
Morgan Stanley
11
Morgan Stanley
New York
$35.1M 964,520 +695,660 +259%
Geode Capital Management
12
Geode Capital Management
Massachusetts
$32.9M 905,125 +46,065 +5%
Dimensional Fund Advisors
13
Dimensional Fund Advisors
Texas
$31.5M 867,635 -235,227 -21%
BC
14
Boxer Capital
California
$24.2M 665,000 +40,000 +6%
RSCM
15
Rock Springs Capital Management
Maryland
$22.7M 625,048 +10,750 +2%
AG
16
Artal Group
Luxembourg
$18.2M 501,360 +501,360 New
EAM
17
Eventide Asset Management
Massachusetts
$16.2M 445,155 – –
Bank of New York Mellon
18
Bank of New York Mellon
New York
$16.1M 442,309 -57,073 -11%
GIM
19
Granahan Investment Management
Massachusetts
$15.2M 417,157 +69,092 +20%
Northern Trust
20
Northern Trust
Illinois
$14.7M 404,110 -5,737 -1%
MRCP
21
Maple Rock Capital Partners
Ontario, Canada
$13.6M 373,584 +139,000 +59%
JPMorgan Chase & Co
22
JPMorgan Chase & Co
New York
$13M 358,478 -43,553 -11%
FC
23
Finepoint Capital
Massachusetts
$12.7M 349,300 – –
Renaissance Technologies
24
Renaissance Technologies
New York
$12.2M 335,800 +75,200 +29%
Goldman Sachs
25
Goldman Sachs
New York
$12.1M 333,786 +83,463 +33%
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