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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
William P. Scully10% Owner2025-01-14100,000$12.79
$1.28MBuy

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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$261.67MInsider
Oleg Nodelman17.51%9,426,640$86.63MInsider
Fmr LLC14.68%7,901,218$72.61MInstitution
Blackrock Inc6.68%3,598,417$33.07MInstitution
Elan Corp PLC5.91%3,182,253$29.24MInsider
Vanguard Group Inc3.81%2,049,849$18.84MInstitution
Armistice Capital LLC3.39%1,824,000$16.76MInstitution
Rubric Capital Management LP2.86%1,540,373$14.16MInstitution
Adar1 Capital Management LLC2.73%1,469,098$13.50MInstitution
Palo Alto Investors LP2.46%1,324,028$12.17MInstitution

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PRTA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
PRTA49.89%50.11%Net Selling
SLS23.11%6.55%Net SellingNet Selling
ABSI64.29%33.08%Net BuyingNet Selling
ASMB50.56%49.44%Net Selling
CRVS55.80%41.58%Net Buying
View Top Biotech Stocks

Prothena Public Co Stock Ownership FAQ

Who owns Prothena Public Co?

Prothena Public Co (NASDAQ: PRTA) is owned by 79.15% institutional shareholders, 79.51% 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 $261.67M.

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