Q3 2025 13F Holders as of 9/30/2025
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Type / Class
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Equity / Ordinary Shares, par value $0.01 per share
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Shares outstanding
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54.4M
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Number of holders
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184
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Total 13F shares, excl. options
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42.6M
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Shares change
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+647K
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Total reported value, excl. options
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$416M
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Value change
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+$14M
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Put/Call ratio
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1.72
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Number of buys
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86
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Number of sells
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-95
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Price
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$9.76
Significant Holders of PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA) as of Q3 2025
234 filings reported holding PRTA - PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share as of Q3 2025.
PROTHENA CORP PUBLIC LTD CO - Ordinary Shares, par value $0.01 per share (PRTA) has 184 institutional shareholders that have filed 13F forms with the Securities Exchange Commission (SEC).
These institutions hold a total of 42.6M shares
of 54.4M outstanding shares and own 78.3% of the company stock.
Largest 10 shareholders include FMR LLC (7.9M shares), BlackRock, Inc. (3.6M shares), VANGUARD GROUP INC (2.05M shares), ARMISTICE CAPITAL, LLC (1.82M shares), Rubric Capital Management LP (1.54M shares), ADAR1 Capital Management, LLC (1.47M shares), Palo Alto Investors LP (1.32M shares), D. E. Shaw & Co., Inc. (1.32M shares), ACADIAN ASSET MANAGEMENT LLC (1.24M shares), and GEODE CAPITAL MANAGEMENT, LLC (1.02M shares).
This table shows the top 184 institutional shareholders of the company equity. This data is sourced directly from the SEC via 13F filings.
| Investor |
Option |
Weight % |
Change % |
Value $ |
* Price $ |
Shares |
Share Change |
Activity |
Report Period |
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.