Company: PRTA
Filing Date: 2025-03-28
Form Type: DEF 14A
Source: 0001559053-25-000017
Chunk: 46

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-03-28
Form: DEF 14A
Chunk 46
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, and the acceleration or waiver of any vesting restriction.

| Eligibility |

Persons eligible to participate in the Amended 2018 LTIP include all members of our Board, which as of March 3, 2025, was comprised of eight non-employee directors, and as of the same date approximately 164

employees (including nine executive officers) and approximately 58 consultants of the Company and its subsidiaries, in each case, as determined by the plan administrator.

| 2025 PROXY STATEMENT |     | 27 |

TABLE OF CONTENTS

| PROPOSAL NO. 4 – APPROVAL OF AN AMENDMENT |

| Limitation on Awards and Shares Available |

If our shareholders approve the Amendment, the number of ordinary shares authorized for issuance under the Amended 2018 LTIP will be equal to the sum of (a) 13,100,000 shares, (b) 1,177,933 shares, which is the number of shares that were available for issuance under the 2012 LTIP as of May 15, 2018, the effective date of the 2018 LTIP, (c) 5,520,433 shares, which is the number of shares that were subject to issued and outstanding awards under the 2012 LTIP that as of March 3, 2025, had expired, been cancelled, or otherwise terminated following May 15, 2018 (the effective date of the 2018 LTIP), and (d) any shares subject to issued and outstanding awards under the 2012 LTIP that expire, are cancelled, or otherwise terminate subsequent to March 3, 2025; provided, that no more than 2,500,000 shares may be issued pursuant to the exercise of ISOs. In addition, the aggregate number of shares available for issuance under the Amended 2018 LTIP will be reduced by 1.5 shares (the "Fungible Share Counting Ratio") for each share delivered in settlement of any awards other than an option, SAR, or any other award for which the holder pays the intrinsic value existing as of the date of grant (each, a "Full Value Award"). The ordinary shares distributed pursuant to an award under the Amended 2018 LTIP may be (a) authorized but unissued shares, (b) shares purchased by the Company on the open market, or (c) treasury shares.

If any shares subject to an award under the Amended 201