Company: PRTA
Filing Date: 2025-03-28
Form Type: DEF 14A
Source: 0001559053-25-000017
Chunk: 13

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-03-28
Form: DEF 14A
Chunk 13
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60, Ireland.

| 6 |     | 2025 PROXY STATEMENT |

#### TABLE OF CONTENTS
| PROPOSAL 
 NO. 1    |     | ELECTION OF DIRECTORS |

| Summary |

The Company’s Constitution requires that at least one-third (which, if not a round number, is rounded to the number which is nearest to and less than one-third) of the directors (excluding any director who wishes to retire and does not wish to offer themselves for re-appointment, and any director appointed by the Board to fill a vacancy since the last annual general meeting) must stand for election at each annual general meeting of shareholders, and that directors must stand for election no later than the third annual general meeting subsequent to their election or appointment to the Board. Generally, vacancies on the Board may be filled only by ordinary resolution of the Company’s shareholders or the affirmative vote of a majority of the remaining directors. A director appointed by the Board to fill a vacancy will serve until the subsequent annual general meeting and must stand for election at that time.

As of the date of this Proxy Statement, we have nine directors serving on our Board. Our Board currently is divided into the following groups:

• Paula K. Cobb and Lars G. Ekman, whose current terms will expire at the Annual Meeting;

• Helen S. Kim, Gene G. Kinney, and Dennis J. Selkoe, whose current terms will expire no later than the annual general meeting of shareholders to be held in 2026; and

• Richard T. Collier, Shane M. Cooke, William H. Dunn, Jr., and Daniel G. Welch, whose current terms will expire no later than the annual general meeting of shareholders to be held in 2027.

Ms. Cobb, Dr. Ekman, and Dr. Kinney have been nominated by the Board to stand for election. Each of Ms. Cobb, Dr. Ekman, and Dr. Kinney were previously elected to the Board by our shareholders. The Board nominated Dr. Kinney to stand for election even though his three-year term does not expire until 2026 because the Company’s Constitution requires that one-third of the directors (excluding any director who wishes to retire and does not wish to offer themselves for re-appointment, and any director appointed by the Board to fill a vacancy since the last annual general meeting) stand for election at each annual general meeting and that a director longest in office since being appointed or last elected must be nominated to complete such slate of directors.