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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1559053	Prothena Corp Plc	PRTA	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1582306	J. Dennis Selkoe	C/O Prothena Biosciences Inc 331 Oyster Point Boulevard South San Francisco CA 94080		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Ordinary Shares, Par Value $0.01 Per Share	Acquisiton	2017-04-03	3,500	$16.42	6,345	No	4	M	Direct
Ordinary Shares, Par Value $0.01 Per Share	Disposition	2017-04-03	3,500	$55.86	2,845	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Ordinary Shares	Stock Option (right to buy)	Disposition	2017-04-03	3,500	$0.00	3,500	$16.42

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
10,500	2014-07-22	2023-07-21	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Ordinary Shares, Par Value $0.01 Per Share	1,363	Indirect	By wife

Footnotes

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