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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
William P. Scully10% Owner2024-12-311,200$13.37
$16.04kBuy
William P. Scully10% Owner2024-12-31800$13.39
$10.72kBuy
William P. Scully10% Owner2024-12-3130,000$12.99
$389.64kBuy
William P. Scully10% Owner2024-12-202,000$15.91
$31.81kBuy
William P. Scully10% Owner2024-12-1873,436$13.93
$1.02MBuy

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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$315.20MInsider
Oleg Nodelman17.51%9,426,640$104.35MInsider
Fmr LLC14.68%7,901,218$87.47MInstitution
Blackrock Inc6.68%3,598,417$39.83MInstitution
Elan Corp PLC5.91%3,182,253$35.23MInsider
Vanguard Group Inc3.81%2,049,849$22.69MInstitution
Armistice Capital LLC3.39%1,824,000$20.19MInstitution
Rubric Capital Management LP2.86%1,540,373$17.05MInstitution
Adar1 Capital Management LLC2.73%1,469,098$16.26MInstitution
Palo Alto Investors LP2.46%1,324,028$14.66MInstitution

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PRTA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
PRTA49.89%50.11%Net Selling
FDMT69.15%22.21%Net SellingNet Selling
JBIO62.53%37.47%Net BuyingNet Buying
VTYX40.58%59.42%Net BuyingNet Buying
CGEM55.51%44.49%Net BuyingNet 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 $315.20M.

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