Company: PRTA
Filing Date: 2025-09-25
Form Type: PRE 14A
Source: 0001140361-25-036135
Chunk: 19

Company: PROTHENA CORP PUBLIC LTD CO
Filing Date: 2025-09-25
Form: PRE 14A
Chunk 19
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 request to the address or telephone number above, a separate copy of the Notice of Internet Availability of Proxy Materials or other EGM materials to a shareholder at a shared address to which a single copy of the documents was delivered.

| By Order of the Board of Directors      |
| Michael J. Malecek                      
 Chief Legal Officer & Company Secretary 
 Dublin, Ireland                         
 [ ], 2025                               |

| 10 |     | 2025 PROXY STATEMENT FOR EXTRAORDINARY GENERAL MEETING |

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