Company: PRTA
Filing Date: 2025-10-07
Form Type: DEF 14A
Source: 0001140361-25-037500
Chunk: 14

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-10-07
Form: DEF 14A
Chunk 14
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   567,103 |     | 1.0%  |
| All 15 directors and executive officers as a group |     | 660,668 |     | 5,238,050 |     | 5,898,718 |     | 10.0% |

| * | Represents beneficial ownership of less than one percent of our issued and outstanding ordinary shares. |

| (1) | Represents ordinary shares. Beneficial ownership is determined in accordance with U.S. Securities and Exchange Commission (the “SEC”) rules and generally includes voting or investment power. Unless otherwise indicated below, to our knowledge, the persons and entities named in this table have sole voting and sole dispositive power with respect to all shares beneficially owned, subject to community property laws where applicable. |

| (2) | For purposes of this table, a person is deemed to have beneficial ownership of our ordinary shares which such person has the right to acquire on or within 60 days after September 24, 2025. The shares reported in this column consist of shares that may be acquired by exercise of NQSOs (nonqualified stock options) granted under our Amended and Restated 2012 Long Term Incentive Plan, our 2018 Long Term Incentive Plan, as amended, or our 2020 Employment Inducement Incentive Plan, as amended. |

| 8 |     | 2025 PROXY STATEMENT FOR EXTRAORDINARY GENERAL MEETING |

TABLE OF CONTENTS

| SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT |

| (3) | The percentage of outstanding shares is based on the 53,829,928 ordinary shares issued and outstanding on September 24, 2025. However, for purposes of computing the percentage of outstanding ordinary shares beneficially owned by each person or group of persons, any shares which such person or group of persons has a right to acquire on or within 60 days after September 24, 2025, are deemed to be outstanding, but are not deemed to be outstanding for the purpose of computing the percentage of beneficial ownership of any other person. |

| (4) | As reported on Amendment No. 3 to Schedule 13G filed with the SEC on February 9, 2024, by FMR LLC (“FMR”) and Abigail P. Johnson, reporting beneficial ownership as of December 29, 2023. FMR has sole voting power over 8,049,190