Company: PRTA
Filing Date: 2025-03-28
Form Type: DEF 14A
Source: 0001559053-25-000017
Chunk: 50

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-03-28
Form: DEF 14A
Chunk 50
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 the equivalent value of dividends paid on our ordinary shares and may be granted alone or in tandem with awards other than options or SARs. Dividend equivalents may accrue on awards, but are not be payable unless and until the applicable award vests.

| Amendment and Termination |

Our Board may amend or terminate the Amended 2018 LTIP at any time; however, except in connection with certain changes in our capital structure, shareholder approval will be required for any amendment that increases the aggregate number of shares available under the Amended 2018 LTIP, "reprices" any option or SAR, or cancels any option or SAR in exchange for cash or another award when the option or SAR price per share exceeds the fair market

value of the underlying shares. In addition, no amendment, suspension, or termination of the Amended 2018 LTIP may, without the consent of the affected participant, materially and adversely affect the participant's rights. No award may be granted pursuant to the Amended 2018 LTIP after the tenth anniversary of the date the 2018 LTIP was adopted by our Board (which was February 21, 2018).

| 2025 PROXY STATEMENT |     | 29 |

TABLE OF CONTENTS

| PROPOSAL NO. 4 – APPROVAL OF AN AMENDMENT |

| Corporate Transactions |

The plan administrator has broad discretion to take action under the Amended 2018 LTIP, as well as make adjustments to the terms and conditions of existing and future awards, to prevent the dilution or enlargement of intended benefits and facilitate necessary or desirable changes in the event of certain transactions and events affecting our ordinary shares, such as share dividends, share splits, mergers, acquisitions, consolidations and other corporate transactions. In addition, in the event of certain non-reciprocal transactions with our shareholders known as "equity restructurings," the plan administrator will make equitable adjustments to the 2018 LTIP and outstanding awards.

If a "Change in Control" of the Company occurs (as defined in the Amended 2018 LTIP), all outstanding

options and SARs that are not exercised shall be assumed or substituted by the surviving corporation and other outstanding awards shall be converted into similar awards of the surviving corporation. If the surviving corporation refuses to assume or substitute for an award, the award shall accelerate and become fully vested and exercisable upon the Change in Control and all restrictions on the award shall lapse, provided that any awards subject to performance-based vesting will