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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 LLC52.90%28,473,156$173.12MInsider
Ecor1 Capital LLC21.52%11,584,280$70.43MInstitution
Oleg Nodelman17.51%9,426,640$57.31MInsider
Fmr LLC14.75%7,941,402$48.28MInstitution
Wellington Management Group LLP9.66%5,199,528$31.61MInstitution
Blackrock Inc7.51%4,042,301$24.58MInstitution
Price T Rowe Associates Inc6.42%3,455,856$21.01MInstitution
Elan Corp PLC5.91%3,182,253$19.35MInsider
Armistice Capital LLC4.08%2,196,000$13.35MInstitution
Palo Alto Investors LP3.08%1,659,734$10.09MInstitution

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PRTA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
PRTA55.35%44.65%Net SellingNet Selling
TERN80.34%19.66%Net BuyingNet Buying
ABSI63.29%36.71%Net SellingNet Selling
PRME37.11%62.89%Net BuyingNet Buying
HUMA39.21%22.32%Net SellingNet Buying
View Top Biotech Stocks

Prothena Public Co Stock Ownership FAQ

Who owns Prothena Public Co?

Prothena Public Co (NASDAQ: PRTA) is owned by 97.08% institutional shareholders, 78.33% 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 52.90% of the company. Ecor1 Capital LLC's Prothena Public Co shares are currently valued at $172.83M.

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