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Prothena Corp
PRTA

Overview Fund Activity

201 hedge funds and large institutions have $2.9B invested in Prothena Corp in 2022 Q4 according to their latest regulatory filings, with 44 funds opening new positions, 77 increasing their positions, 51 reducing their positions, and 23 closing their positions.

Holders
201
Holders Change
+18
Holders Change %
+9.84%
% of All Funds
3.24%
Holding in Top 10
8
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-11.11%
% of All Funds
0.13%
New
44
Increased
77
Reduced
51
Closed
23
Calls
$25.7M
Puts
$9.23M
Net Calls
+$16.5M
Net Calls Change
-$11.2M

Top Buyers

1
Wellington Management Group
1
Wellington Management Group
Massachusetts
$106M
2
Janus Henderson Group
2
Janus Henderson Group
United Kingdom
$86.3M
3
APM
3
Avidity Partners Management
Texas
$178M
4
Fidelity Investments
4
Fidelity Investments
Massachusetts
$238M
5
BlackRock
5
BlackRock
New York
$210M

Top Sellers

1
RG
1
Redmile Group
California
$0
2
Federated Hermes
2
Federated Hermes
Pennsylvania
$62.8K
3
Citadel Advisors
3
Citadel Advisors
Florida
$15K
4
SC
4
Sessa Capital
New York
$0
5
Renaissance Technologies
5
Renaissance Technologies
New York
$28.6M
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$698M 11,584,280 – –
Fidelity Investments
2
Fidelity Investments
Massachusetts
$238M 3,947,272 +784,854 +25%
BlackRock
3
BlackRock
New York
$210M 3,485,068 +346,324 +11%
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$193M 3,205,903 +223,962 +8%
APM
5
Avidity Partners Management
Texas
$178M 2,953,000 +986,000 +50%
State Street
6
State Street
Massachusetts
$124M 2,051,960 +170,166 +9%
Wellington Management Group
7
Wellington Management Group
Massachusetts
$106M 1,764,893 +1,333,384 +309%
PAI
8
Palo Alto Investors
California
$99.9M 1,658,577 +8,800 +0.5%
FLAM
9
First Light Asset Management
Minnesota
$92.5M 1,535,599 -3,079 -0.2%
Janus Henderson Group
10
Janus Henderson Group
United Kingdom
$86.3M 1,432,323 +1,126,427 +368%
T. Rowe Price Investment Management
11
T. Rowe Price Investment Management
Maryland
$55.9M 927,959 +79,997 +9%
PHS
12
PFM Health Sciences
California
$52.7M 875,464 +35,226 +4%
Vanguard Group
13
Vanguard Group
Pennsylvania
$52.4M 870,134 +62,174 +8%
RSCM
14
Rock Springs Capital Management
Maryland
$45.4M 753,462 +75,000 +11%
Geode Capital Management
15
Geode Capital Management
Massachusetts
$43.1M 715,601 +79,877 +13%
Nuveen Asset Management
16
Nuveen Asset Management
Illinois
$34.5M 572,790 +82,338 +17%
Renaissance Technologies
17
Renaissance Technologies
New York
$28.6M 474,900 -162,000 -25%
EAM
18
Eventide Asset Management
Massachusetts
$26.4M 438,732 +208,732 +91%
JPMorgan Chase & Co
19
JPMorgan Chase & Co
New York
$24.4M 404,551 +122,369 +43%
MRCP
20
Maple Rock Capital Partners
Ontario, Canada
$24.1M 399,414 – –
Northern Trust
21
Northern Trust
Illinois
$21.8M 361,585 +14,437 +4%
PM
22
Prosight Management
Texas
$19.9M 330,000 +8,907 +3%
Two Sigma Advisers
23
Two Sigma Advisers
New York
$19.7M 327,000 -8,000 -2%
FC
24
Finepoint Capital
Massachusetts
$19.5M 322,900 +17,500 +6%
Point72 Asset Management
25
Point72 Asset Management
Connecticut
$18.8M 311,500 +143,100 +85%
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