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Prothena Corp

Name Holding Trade Value Shares
Change
Change in
Stake
EC
1
EcoR1 Capital
California
$561M
Fidelity Investments
2
Fidelity Investments
Massachusetts
$328M +$149M +2,814,753 +71%
BlackRock
3
BlackRock
New York
$176M +$7.37M +139,559 +4%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$155M -$191K -3,610 -0.1%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$110M +$26.5M +501,185 +28%
State Street
6
State Street
Massachusetts
$102M +$2.67M +50,498 +2%
PAI
7
Palo Alto Investors
California
$80.6M +$275K +5,200 +0.3%
Janus Henderson Group
8
Janus Henderson Group
$77.4M +$8.66M +163,980 +11%
FLAM
9
First Light Asset Management
Minnesota
$73.2M -$1.29M -24,431 -2%
Dimensional Fund Advisors
10
Dimensional Fund Advisors
Texas
$59.7M -$4.64M -87,866 -7%
APM
11
Avidity Partners Management
Texas
$51.8M -$99.6M -1,884,800 -64%
Vanguard Group
12
Vanguard Group
Pennsylvania
$45.8M +$3.93M +74,422 +9%
T. Rowe Price Investment Management
13
T. Rowe Price Investment Management
Maryland
$44.3M -$701K -13,276 -1%
Geode Capital Management
14
Geode Capital Management
Massachusetts
$37.8M +$3.39M +64,223 +9%
PHS
15
PFM Health Sciences
California
$37.5M -$5.33M -100,918 -12%
RSCM
16
Rock Springs Capital Management
Maryland
$36.5M
Bank of America
17
Bank of America
North Carolina
$27.4M +$23.4M +442,770 +364%
Nuveen
18
Nuveen
North Carolina
$24.6M -$3.49M -66,062 -12%
PM
19
Prosight Management
Texas
$21.7M +$6.19M +117,092 +35%
EAM
20
Eventide Asset Management
Massachusetts
$21.3M
Renaissance Technologies
21
Renaissance Technologies
New York
$19.7M -$3.57M -67,600 -14%
Northern Trust
22
Northern Trust
Illinois
$18.5M +$1.11M +21,103 +6%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$18.5M +$2.87M +54,300 +17%
Two Sigma Investments
24
Two Sigma Investments
New York
$17.7M +$8.56M +162,104 +80%
Point72 Asset Management
25
Point72 Asset Management
Connecticut
$16.2M +$1.24M +23,493 +8%