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Prothena Corp
PRTA

Overview Fund Activity

146 hedge funds and large institutions have $1B invested in Prothena Corp in 2021 Q1 according to their latest regulatory filings, with 22 funds opening new positions, 39 increasing their positions, 49 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
146
Holders Change
+6
Holders Change %
+4.29%
% of All Funds
2.57%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
22
Increased
39
Reduced
49
Closed
13
Calls
$16.5M
Puts
$5.57M
Net Calls
+$10.9M
Net Calls Change
+$8.89M

Top Buyers

1
T. Rowe Price Associates
1
T. Rowe Price Associates
Maryland
$83.2M
2
RG
2
Redmile Group
California
$46.7M
3
Fidelity Investments
3
Fidelity Investments
Massachusetts
$78.3M
4
EC
4
EcoR1 Capital
California
$277M
5
FLAM
5
First Light Asset Management
Minnesota
$73.7M

Top Sellers

1
O
1
OrbiMed
New York
$0
2
IC
2
Ikarian Capital
Texas
$11M
3
Millennium Management
3
Millennium Management
New York
$577K
4
PM
4
Prosight Management
Texas
$15.1M
5
GPP
5
Great Point Partners
Connecticut
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
Axa
26
Axa
France
$4.22M -$196K -7,800 -4%
Bank of New York Mellon
27
Bank of New York Mellon
New York
$3.27M -$239K -9,522 -7%
PIM
28
Platinum Investment Management
Australia
$3.22M – – –
EGI
29
EAM Global Investors
California
$2.18M +$2.18M +86,860 New
TD Asset Management
30
TD Asset Management
Ontario, Canada
$1.98M +$1.98M +78,888 New
Massachusetts Financial Services
31
Massachusetts Financial Services
Massachusetts
$1.84M -$885K -35,255 -32%
Prudential Financial
32
Prudential Financial
New Jersey
$1.83M -$111K -4,404 -6%
AA
33
ALPS Advisors
Colorado
$1.81M +$1.98K +79 +0.1%
Hudson Bay Capital Management
34
Hudson Bay Capital Management
Connecticut
$1.76M +$1.76M +70,000 New
EP
35
Eversept Partners
New York
$1.72M -$3.38M -134,753 -66%
Acadian Asset Management
36
Acadian Asset Management
Massachusetts
$1.66M -$2.77M -110,396 -63%
Russell Investments Group
37
Russell Investments Group
United Kingdom
$1.63M -$691K -27,537 -30%
California Public Employees Retirement System
38
California Public Employees Retirement System
California
$1.57M -$148K -5,884 -9%
EI
39
EAM Investors
California
$1.55M +$1.55M +61,657 New
PPA
40
Parametric Portfolio Associates
Washington
$1.52M +$7.21K +287 +0.5%
D.E. Shaw & Co
41
D.E. Shaw & Co
New York
$1.49M -$3.88M -154,311 -72%
Swiss National Bank
42
Swiss National Bank
Switzerland
$1.49M +$35.2K +1,400 +2%
RhumbLine Advisers
43
RhumbLine Advisers
Massachusetts
$1.48M -$185K -7,370 -11%
Citadel Advisors
44
Citadel Advisors
Florida
$1.41M +$383K +15,239 +37%
Citigroup
45
Citigroup
New York
$1.38M +$1.19M +47,523 +628%
BFM
46
Boothbay Fund Management
New York
$1.21M -$1.94M -77,087 -62%
Bank of America
47
Bank of America
North Carolina
$1.2M +$826K +32,894 +219%
California State Teachers Retirement System (CalSTRS)
48
California State Teachers Retirement System (CalSTRS)
California
$1.17M – – –
AC
49
Apogem Capital
New York
$1.16M -$523K -20,825 -31%
DA
50
DCF Advisers
Connecticut
$1.15M +$1.15M +45,856 New
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