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Prothena Corp

Name Holding Trade Value Shares
Change
Change in
Stake
EC
1
EcoR1 Capital
California
$791M
Fidelity Investments
2
Fidelity Investments
Massachusetts
$540M +$74.2M +1,150,741 +17%
BlackRock
3
BlackRock
New York
$247M -$863K -13,373 -0.4%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$243M +$22.7M +351,475 +11%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$151M -$3.54M -54,856 -2%
State Street
6
State Street
Massachusetts
$128M -$14.8M -228,780 -11%
Janus Henderson Group
7
Janus Henderson Group
$114M +$4.92M +76,228 +5%
PAI
8
Palo Alto Investors
California
$113M -$408K -6,319 -0.4%
FLAM
9
First Light Asset Management
Minnesota
$102M -$712K -11,039 -0.7%
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$78.5M -$5.32M -82,427 -7%
Vanguard Group
11
Vanguard Group
Pennsylvania
$71.1M +$6.2M +96,125 +10%
T. Rowe Price Investment Management
12
T. Rowe Price Investment Management
Maryland
$59.8M -$2.48M -38,513 -4%
Geode Capital Management
13
Geode Capital Management
Massachusetts
$57.2M +$3.78M +58,597 +8%
PHS
14
PFM Health Sciences
California
$52.9M
RSCM
15
Rock Springs Capital Management
Maryland
$51.4M
APM
16
Avidity Partners Management
Texas
$36.5M -$34.4M -533,200 -50%
Bank of New York Mellon
17
Bank of New York Mellon
New York
$35.1M +$22.6M +350,141 +213%
EAM
18
Eventide Asset Management
Massachusetts
$30.4M +$414K +6,423 +1%
Nuveen
19
Nuveen
North Carolina
$30.2M -$4.11M -63,712 -13%
JP Morgan Chase
20
JP Morgan Chase
New York
$28.3M +$5.57M +86,347 +26%
Northern Trust
21
Northern Trust
Illinois
$28.1M +$1.89M +29,287 +8%
Renaissance Technologies
22
Renaissance Technologies
New York
$22.1M -$5.39M -83,500 -21%
FC
23
Finepoint Capital
Massachusetts
$21.7M -$922K -14,300 -4%
Charles Schwab
24
Charles Schwab
California
$21.3M +$872K +13,512 +5%
BC
25
Boxer Capital
California
$20.5M