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Prothena Corp

Name Holding Trade Value Shares
Change
Change in
Stake
EC
1
EcoR1 Capital
California
$702M
Fidelity Investments
2
Fidelity Investments
Massachusetts
$192M +$7.49M +237,020 +8%
BlackRock
3
BlackRock
New York
$190M -$10.5M -332,556 -10%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$181M -$94.3M -2,983,847 -50%
APM
5
Avidity Partners Management
Texas
$119M +$62.2M +1,967,000 New
State Street
6
State Street
Massachusetts
$114M -$11.5M -364,279 -16%
PAI
7
Palo Alto Investors
California
$100M -$1M -31,700 -2%
FLAM
8
First Light Asset Management
Minnesota
$93.3M -$12.6M -399,505 -21%
Dimensional Fund Advisors
9
Dimensional Fund Advisors
Texas
$90M -$2.62M -82,848 -5%
T. Rowe Price Investment Management
10
T. Rowe Price Investment Management
Maryland
$51.4M +$26.8M +847,962 New
PHS
11
PFM Health Sciences
California
$50.9M +$15.7M +495,124 +143%
Vanguard Group
12
Vanguard Group
Pennsylvania
$49M -$668K -21,116 -3%
RSCM
13
Rock Springs Capital Management
Maryland
$41.1M
Renaissance Technologies
14
Renaissance Technologies
New York
$38.6M -$1.55M -49,100 -7%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$38.5M +$128K +4,044 +0.6%
RG
16
Redmile Group
California
$31.9M -$6.66M -210,600 -29%
Nuveen
17
Nuveen
North Carolina
$29.7M -$7.36M -232,720 -32%
Wellington Management Group
18
Wellington Management Group
Massachusetts
$26.2M +$10.7M +338,055 +362%
MRCP
19
Maple Rock Capital Partners
Ontario, Canada
$24.2M +$2.07M +65,414 +20%
Federated Hermes
20
Federated Hermes
Pennsylvania
$21.2M +$10.9M +345,634 +7,676%
Northern Trust
21
Northern Trust
Illinois
$21M -$160K -5,073 -1%
Two Sigma Advisers
22
Two Sigma Advisers
New York
$20.3M -$3.56M -112,700 -25%
PM
23
Prosight Management
Texas
$19.5M -$7.24M -228,907 -42%
SCM
24
Suvretta Capital Management
New York
$19.2M +$10M +316,531 New
FC
25
Finepoint Capital
Massachusetts
$18.5M -$4.81M -152,100 -33%