PROTHENA CORP PUBLIC LTD CO — Proxy Solicitation & Information Statement 2013

Apr 10, 2013

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant x Filed by a Party other than the Registrant ¨

Check the appropriate box:

¨	Preliminary Proxy Statement
¨	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
¨	Definitive Proxy Statement
x	Definitive Additional Materials
¨	Soliciting Material Pursuant to § 240.14a-12

PROTHENA CORPORATION PLC

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

x	No fee required.
¨	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)	Title of each class of securities to which transaction applies:
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	(3)	Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
filing fee is calculated and state how it was determined):
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	(5)	Total fee paid:
¨	Fee paid previously with preliminary materials.
¨	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify
the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	(1)	Amount Previously Paid:
	(2)	Form, Schedule or Registration Statement No.:
	(3)	Filing Party:
	(4)	Date Filed:

See the reverse side of this notice to obtain

proxy materials and voting instructions.

*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on .

You are receiving this communication because you hold

shares in the above named company.

This is not a ballot. You cannot use this notice to vote

these shares. This communication presents only an

overview of the more complete proxy materials that are

available to you on the Internet. You may view the proxy

materials online at www.proxyvote.com or easily request a

paper copy (see reverse side).

We encourage you to access and review all of the important

information contained in the proxy materials before voting.

Meeting Information

Meeting Type:

For holders as of:

Date: Time:

Location:

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PROTHENA CORPORATION PLC

PROTHENA CORPORATION PLC

C/O PROTHENA BIOSCIENCES INC

650 GATEWAY BOULEVARD

SOUTH SAN FRANCISCO, CA 94080

Annual Meeting

March 25, 2013

May 22, 2013

May 22, 2013 8:00 AM LST

Four Seasons Hotel Dublin

Simmonscourt Road

Dublin 4, Ireland prothena

Please Choose One of the Following Voting Methods

Vote In Person: Many shareholder meetings have attendance requirements including, but not limited to, the possession

of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special

requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to www.proxyvote.com. Have the information that is printed in the box

marked by the arrow available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

How To Vote

 XXXX XXXX XXXX

Before You Vote

How to Access the Proxy Materials

Proxy Materials Available to VIEW or RECEIVE:

How to View Online:

Have the information that is printed in the box marked by the arrow (located on the

following page) and visit: www.proxyvote.com.

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for

requesting a copy. Please choose one of the following methods to make your request:

1) BY INTERNET: www.proxyvote.com

2) BY TELEPHONE: 1-800-579-1639

3) BY E-MAIL*: sendmaterial@proxyvote.com

• If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked

by the arrow (located on the following page) in the subject line.

 XXXX XXXX XXXX

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1. Combined 10-K/Notice & Proxy Statement and Irish Statutory Accounts*

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment

advisor. Please make the request as instructed above on or before May 08, 2013 to facilitate timely delivery.

Voting items

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The Board of Directors recommends you vote FOR the following:

1. Election of Directors

Nominees

01 Dr. Lars Ekman

02 Dr. Christopher Henney

The Board of Directors recommends you vote FOR the following proposal:

2 To ratify, in a non-binding vote, the selection, by the Audit Committee of the Board of Directors, of KPMG LLP

as the independent registered public accounting firm of the Company for its fiscal year ending December 31,

2013 and to authorize, in a binding vote, the Audit Committee to determine the auditors’ remuneration.

NOTE: The proxies are authorized to vote in their discretion upon such other business as may properly come before

the Annual General Meeting or any adjournment or postponement thereof.

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