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Prothena Corp

Name Holding Trade Value Shares
Change
Change in
Stake
EC
1
EcoR1 Capital
California
$698M
Fidelity Investments
2
Fidelity Investments
Massachusetts
$238M +$46M +784,854 +25%
BlackRock
3
BlackRock
New York
$210M +$20.3M +346,324 +11%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$193M +$13.1M +223,962 +8%
APM
5
Avidity Partners Management
Texas
$178M +$57.7M +986,000 +50%
State Street
6
State Street
Massachusetts
$124M +$9.96M +170,166 +9%
Wellington Management Group
7
Wellington Management Group
Massachusetts
$106M +$78.1M +1,333,384 +309%
PAI
8
Palo Alto Investors
California
$99.9M +$515K +8,800 +0.5%
FLAM
9
First Light Asset Management
Minnesota
$92.5M -$180K -3,079 -0.2%
Janus Henderson Group
10
Janus Henderson Group
$86.3M +$74.9M +1,279,375 +836%
T. Rowe Price Investment Management
11
T. Rowe Price Investment Management
Maryland
$55.9M +$4.68M +79,997 +9%
PHS
12
PFM Health Sciences
California
$52.7M +$2.06M +35,226 +4%
Vanguard Group
13
Vanguard Group
Pennsylvania
$52.4M +$3.64M +62,174 +8%
RSCM
14
Rock Springs Capital Management
Maryland
$45.4M +$4.39M +75,000 +11%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$43.1M +$4.68M +79,877 +13%
Nuveen
16
Nuveen
North Carolina
$34.5M +$4.82M +82,338 +17%
Renaissance Technologies
17
Renaissance Technologies
New York
$28.6M -$9.49M -162,000 -25%
EAM
18
Eventide Asset Management
Massachusetts
$26.4M +$12.2M +208,732 +91%
JP Morgan Chase
19
JP Morgan Chase
New York
$24.4M +$7.17M +122,369 +43%
MRCP
20
Maple Rock Capital Partners
Ontario, Canada
$24.1M
Northern Trust
21
Northern Trust
Illinois
$21.8M +$845K +14,437 +4%
PM
22
Prosight Management
Texas
$19.9M +$522K +8,907 +3%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$19.7M -$468K -8,000 -2%
FC
24
Finepoint Capital
Massachusetts
$19.5M +$1.02M +17,500 +6%
Point72 Asset Management
25
Point72 Asset Management
Connecticut
$18.8M +$8.38M +143,100 +85%