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Prothena Corp
PRTA

Overview Fund Activity

183 hedge funds and large institutions have $2.7B invested in Prothena Corp in 2022 Q3 according to their latest regulatory filings, with 40 funds opening new positions, 52 increasing their positions, 52 reducing their positions, and 20 closing their positions.

Holders
183
Holders Change
+17
Holders Change %
+10.24%
% of All Funds
3.16%
Holding in Top 10
9
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+80%
% of All Funds
0.16%
New
40
Increased
52
Reduced
52
Closed
20
Calls
$58.2M
Puts
$30.5M
Net Calls
+$27.7M
Net Calls Change
+$13.8M

Top Buyers

1
APM
1
Avidity Partners Management
Texas
$119M
2
T. Rowe Price Investment Management
2
T. Rowe Price Investment Management
Maryland
$51.4M
3
PHS
3
PFM Health Sciences
California
$50.9M
4
Federated Hermes
4
Federated Hermes
Pennsylvania
$21.2M
5
Wellington Management Group
5
Wellington Management Group
Massachusetts
$26.2M

Top Sellers

1
T. Rowe Price Associates
1
T. Rowe Price Associates
Maryland
$181M
2
FLAM
2
First Light Asset Management
Minnesota
$93.3M
3
State Street
3
State Street
Massachusetts
$114M
4
BlackRock
4
BlackRock
New York
$190M
5
Nuveen Asset Management
5
Nuveen Asset Management
Illinois
$29.7M
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$702M 11,584,280 – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$192M 3,162,418 +237,020 +8%
BlackRock
3
BlackRock
New York
$190M 3,138,744 -332,556 -10%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$181M 2,981,941 -2,983,847 -50%
APM
5
Avidity Partners Management
Texas
$119M 1,967,000 +1,967,000 New
State Street
6
State Street
Massachusetts
$114M 1,881,794 -364,279 -16%
PAI
7
Palo Alto Investors
California
$100M 1,649,777 -31,700 -2%
FLAM
8
First Light Asset Management
Minnesota
$93.3M 1,538,678 -399,505 -21%
Dimensional Fund Advisors
9
Dimensional Fund Advisors
Texas
$90M 1,483,905 -82,848 -5%
T. Rowe Price Investment Management
10
T. Rowe Price Investment Management
Maryland
$51.4M 847,962 +847,962 New
PHS
11
PFM Health Sciences
California
$50.9M 840,238 +495,124 +143%
Vanguard Group
12
Vanguard Group
Pennsylvania
$49M 807,960 -21,116 -3%
RSCM
13
Rock Springs Capital Management
Maryland
$41.1M 678,462 – –
Renaissance Technologies
14
Renaissance Technologies
New York
$38.6M 636,900 -49,100 -7%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$38.5M 635,724 +4,044 +0.6%
RG
16
Redmile Group
California
$31.9M 525,575 -210,600 -29%
Nuveen Asset Management
17
Nuveen Asset Management
Illinois
$29.7M 490,452 -232,720 -32%
Wellington Management Group
18
Wellington Management Group
Massachusetts
$26.2M 431,509 +338,055 +362%
MRCP
19
Maple Rock Capital Partners
Ontario, Canada
$24.2M 399,414 +65,414 +20%
Federated Hermes
20
Federated Hermes
Pennsylvania
$21.2M 350,137 +345,634 +7,676%
Northern Trust
21
Northern Trust
Illinois
$21M 347,148 -5,073 -1%
Two Sigma Advisers
22
Two Sigma Advisers
New York
$20.3M 335,000 -112,700 -25%
PM
23
Prosight Management
Texas
$19.5M 321,093 -228,907 -42%
SCM
24
Suvretta Capital Management
New York
$19.2M 316,531 +316,531 New
Janus Henderson Group
25
Janus Henderson Group
United Kingdom
$18.6M 305,896 +122,856 +67%
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