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PRTA

PRTA

Prothena Corporation plc

Institutional holders
190
As of Q2 2026
Total 13F value
$497.3M
Sum of disclosed positions
New positions
32
This quarter
Sold positions
23
This quarter

Top holders

Institutions with disclosed positions in this stock

FundValueShares% PortfolioChange
FMR LLC

Fmr Llc

$70.5M7.20M0.00%-4.7%
Rubric Capital Management LP

Rubric Capital Management Lp

$49M5.00M0.45%Unchanged
BlackRock, Inc.

Blackrock, Inc.

$47.7M4.87M0.00%+4.8%
Palo Alto Investors LP

Palo Alto Investors Lp

$33.6M3.43M1.55%-5.4%
STATE STREET CORP

State Street Corporation

$23.4M2.39M0.00%+23.5%
ACADIAN ASSET MANAGEMENT LLC

Acadian Asset Management Llc

$19.7M2.01M0.02%+29.9%
VANGUARD PORTFOLIO MANAGEMENT LLC

Vanguard Portfolio Management Llc

$16.2M1.65M0.00%+14.2%
D. E. Shaw & Co., Inc.

D.E. Shaw & Co

$15.8M1.61M0.01%-8.6%
ADAR1 Capital Management, LLC

Adar1 Capital Management, Llc

$15.2M1.55M0.70%-1.7%
TWO SIGMA INVESTMENTS, LP

Two Sigma Investments

$12.4M1.26M0.01%+4.9%
GEODE CAPITAL MANAGEMENT, LLC

Geode Capital Management, Llc

$11M1.13M0.00%+2.5%
FEDERATED HERMES, INC.

Federated Hermes, Inc.

$10.6M1.08M0.01%+2.3%
MORGAN STANLEY

Morgan Stanley

$9.7M995.3K0.00%-19.1%
GOLDMAN SACHS GROUP INC

Goldman Sachs Group

$9.6M979.7K0.00%+19.6%
JACOBS LEVY EQUITY MANAGEMENT, INC

Jacobs Levy Equity Management, Inc

$9.5M966.0K0.03%-0.6%
DIMENSIONAL FUND ADVISORS LP

Dimensional Fund Advisors Lp

$8.9M905.7K0.00%+15.7%
Qube Research & Technologies Ltd

Qube Research & Technologies Ltd

$7.7M791.2K0.01%+28.7%
RENAISSANCE TECHNOLOGIES LLC

Renaissance Technologies

$6.8M697.6K0.01%+14.8%
Man Group plc

Man Group Plc

$6.6M678.1K0.01%+77.7%
CITADEL ADVISORS LLC

Citadel Advisors

$6.6M677.6K0.00%-22.2%
Mariner, LLC

Mariner, Llc

$6.1M625.1K0.01%+11.0%
Nuveen, LLC

Nuveen, Llc

$5.5M557.2K0.00%-26.6%
VANGUARD CAPITAL MANAGEMENT LLC

Vanguard Capital Management Llc

$4.7M479.9K0.00%-0.9%
NORTHERN TRUST CORP

Northern Trust Corp

$4.5M457.1K0.00%+23.7%
Birchview Capital, LP

Birchview Capital, Lp

$4.4M449.0K2.06%Unchanged
Rangeley Capital, LLC

Rangeley Capital, Llc

$4.1M417.3K3.73%-7.2%
Sixth Street Partners Management Company, L.P.

Sixth Street Partners Management Company, L.P.

$3.5M355.9K0.00%New Position
CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Charles Schwab Investment Management Inc

$3.5M355.9K0.00%-0.2%
MONIMUS CAPITAL MANAGEMENT, LP

Monimus Capital Management, Lp

$3.2M329.1K0.75%-32.2%
BNP PARIBAS FINANCIAL MARKETS

Bnp Paribas Arbitrage, Snc

$3.1M315.8K0.00%-25.6%
AQR CAPITAL MANAGEMENT LLC

Aqr Capital Management Llc

$3M302.6K0.00%+48.3%
Penbrook Management LLC

Penbrook Management Llc

$2.7M271.7K1.70%Unchanged
VANGUARD FIDUCIARY TRUST CO

Vanguard Fiduciary Trust Co

$2.5M259.1K0.00%+1.8%
UBS Group AG

Ubs Group Ag

$2.4M241.4K0.00%-26.5%
MACKENZIE FINANCIAL CORP

Mackenzie Financial Corp

$2.3M239.9K0.00%New Position
Coppell Advisory Solutions LLC

Coppell Advisory Solutions Llc

$2.3M120.19%New Position
Squarepoint Ops LLC

Squarepoint Ops Llc

$2.2M224.0K0.00%-3.0%
BANK OF AMERICA CORP /DE/

Bank Of America

$2M208.2K0.00%-47.1%
Focused Wealth Management, Inc

Focused Wealth Management, Inc

$2M207.4K0.18%+0.0%
Connor, Clark & Lunn Investment Management Ltd.

Connor, Clark & Lunn Investment Management Ltd.

$1.9M191.7K0.00%+22.4%
MARSHALL WACE, LLP

Marshall Wace, Llp

$1.9M190.8K0.00%+328.1%
Quantinno Capital Management LP

Quantinno Capital Management Lp

$1.6M158.3K0.00%+9.7%
DIADEMA PARTNERS LP

Diadema Partners Lp

$1.5M149.5K0.18%New Position
Axiom Investment Management LLC

Axiom Investment Management Llc

$1.4M1460.00%New Position
Bank of New York Mellon Corp

Bank Of New York Mellon Corp

$1.3M133.9K0.00%-1.8%
MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Massachusetts Financial Services Co /Ma/

$1.2M127.0K0.00%-3.8%
Assenagon Asset Management S.A.

Assenagon Asset Management S.A.

$1.2M125.6K0.00%-18.2%
Russell Investments Group, Ltd.

Russell Investments Group, Ltd.

$1.2M121.9K0.00%+21.1%
PRICE T ROWE ASSOCIATES INC /MD/

Price T Rowe Associates Inc /Md/

$1.1M109.3K0.00%+14.2%
Hennion & Walsh Asset Management, Inc.

Hennion & Walsh Asset Management, Inc.

$889K90.8K0.03%+2.5%

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