PROTHENA CORP PUBLIC LTD CO — Director's Dealing 2016

May 24, 2016

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Prothena Corp plc (PRTA)
CIK: 0001559053
Period of Report: 2016-05-20

Reporting Person: Cooke Shane (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2016-05-20	Stock Option (right to buy)	$42.50	A	15000	Acquired	2026-05-20	Ordinary Shares (15000)	Direct

Footnotes

F1: The shares subject to the option will vest and become exercisable as to 100% of the total number of shares subject to the option on the earlier of the first anniversary of the grant date or the day prior to the annual general meeting in 2017 of the Issuer's shareholders, assuming continuous service as a director until such vesting date.