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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$240.03MInsider
Oleg Nodelman17.51%9,426,640$79.47MInsider
Fmr LLC14.68%7,901,218$66.61MInstitution
Blackrock Inc7.32%3,939,398$33.21MInstitution
Adar1 Capital Management LLC6.27%3,375,009$28.45MInstitution
Elan Corp PLC5.91%3,182,253$26.83MInsider
Armistice Capital LLC4.15%2,236,000$18.85MInstitution
Vanguard Group Inc4.04%2,176,227$18.35MInstitution
Palo Alto Investors LP2.37%1,274,753$10.75MInstitution
Federated Hermes Inc2.19%1,181,087$9.96MInstitution

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PRTA vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
PRTA49.39%50.61%Net Selling
REPL66.02%33.98%Net SellingNet Selling
ERAS71.73%28.27%Net Buying
ZYBT0.89%0.00%
ZVRA64.43%22.15%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 77.61% 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 $233.76M.

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