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NASDAQ: PRTA
Prothena Corp Public Ltd Co Stock Ownership - Who owns Prothena Public Co?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Prothena Corp Public Ltd Co insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Ecor1 Capital LLC10% Owner2025-05-061,984,053$7.64
$15.16MSell
Ecor1 Capital LLC10% Owner2025-05-05977,693$8.11
$7.93MSell
Ecor1 Capital LLC10% Owner2025-05-023,317,938$8.36
$27.74MSell

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Net Insider Buy/Sell (L12M) Ownership

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PRTA Shareholders

What type of owners hold Prothena Corp Public Ltd Co stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Ecor1 Capital LLC52.89%28,473,156$278.18MInsider
Oleg Nodelman17.51%9,426,640$92.10MInsider
Fmr LLC14.03%7,551,218$73.78MInstitution
Blackrock Inc7.63%4,107,459$40.13MInstitution
Rubric Capital Management LP6.83%3,677,331$35.93MInstitution
Elan Corp PLC5.91%3,182,253$31.09MInsider
State Street Corp4.21%2,267,802$22.16MInstitution
Vanguard Group Inc3.98%2,140,909$20.92MInstitution
D E Shaw Co Inc3.12%1,681,369$16.43MInstitution
Armistice Capital LLC2.79%1,500,000$14.66MInstitution

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PRTA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
PRTA52.47%47.53%Net Selling
TRDA41.58%58.42%Net SellingNet Selling
FULC70.01%29.99%Net SellingNet Selling
UPB73.77%26.23%
RIGL39.34%60.66%Net SellingNet Selling
View Top Biotech Stocks

Prothena Public Co Stock Ownership FAQ

Who owns Prothena Public Co?

Prothena Public Co (NASDAQ: PRTA) is owned by 87.78% institutional shareholders, 79.50% Prothena Public Co insiders, and 0.00% retail investors. Ecor1 Capital LLC is the largest individual Prothena Public Co shareholder, owning 28.47M shares representing 52.89% of the company. Ecor1 Capital LLC's Prothena Public Co shares are currently valued at $272.77M.

If you're new to stock investing, here's how to buy Prothena Public Co stock.
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