PROTHENA CORP PUBLIC LTD CO — Director's Dealing 2017

Apr 5, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Prothena Corp plc (PRTA)
CIK: 0001559053
Period of Report: 2017-04-03

Reporting Person: Selkoe Dennis J. (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-04-03	Ordinary Shares, par value $0.01 per share	M	3500	$16.42	Acquired	6345	Direct
2017-04-03	Ordinary Shares, par value $0.01 per share	S	3500	$55.8637	Disposed	2845	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-04-03	Stock Option (right to buy)	$16.42	M	3500	Disposed	2023-07-21	Ordinary Shares (3500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Ordinary Shares, par value $0.01 per share	1363	Indirect

Footnotes

F1: The sale reported on this Form 4 was effected pursuant to a Rule 10b5 1 trading plan adopted by the Reporting Person.

F2: The transaction was executed in multiple trades in prices ranging from $55.39 to $56.14, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.