<SEC-DOCUMENT>0000905148-24-000790.txt : 20240223
<SEC-HEADER>0000905148-24-000790.hdr.sgml : 20240223
<ACCEPTANCE-DATETIME>20240223173601
ACCESSION NUMBER:		0000905148-24-000790
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20240221
FILED AS OF DATE:		20240223
DATE AS OF CHANGE:		20240223

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WELCH DANIEL G
		CENTRAL INDEX KEY:			0001206199
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35676
		FILM NUMBER:		24672822

	MAIL ADDRESS:	
		STREET 1:		4611 UNIVERSITY DR
		STREET 2:		4 UNIVERSITY PLACE
		CITY:			DURHAM
		STATE:			NC
		ZIP:			27707

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROTHENA CORP PUBLIC LTD CO
		CENTRAL INDEX KEY:			0001559053
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		ORGANIZATION NAME:           	03 Life Sciences
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		77 SIR JOHN ROGERSON'S QUAY, BLOCK C
		STREET 2:		GRAND CANAL DOCKLANDS
		CITY:			DUBLIN 2
		STATE:			L2
		ZIP:			D02 VK60
		BUSINESS PHONE:		011-353-1-236-2500

	MAIL ADDRESS:	
		STREET 1:		77 SIR JOHN ROGERSON'S QUAY, BLOCK C
		STREET 2:		GRAND CANAL DOCKLANDS
		CITY:			DUBLIN 2
		STATE:			L2
		ZIP:			D02 VK60

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Prothena Corp plc
		DATE OF NAME CHANGE:	20121102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Neotope Corp Ltd
		DATE OF NAME CHANGE:	20120926
</SEC-HEADER>
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<ownershipDocument>

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    <periodOfReport>2024-02-21</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001559053</issuerCik>
        <issuerName>PROTHENA CORP PUBLIC LTD CO</issuerName>
        <issuerTradingSymbol>PRTA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001206199</rptOwnerCik>
            <rptOwnerName>WELCH DANIEL G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PROTHENA BIOSCIENCES INC</rptOwnerStreet1>
            <rptOwnerStreet2>1800 SIERRA POINT PARKWAY</rptOwnerStreet2>
            <rptOwnerCity>BRISBANE</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94005</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Exhibit List: Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Michael J. Malecek, as Attorney-in-Fact for Daniel G. Welch</signatureName>
        <signatureDate>2024-02-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>welchpoa.htm
<TEXT>
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  <div>
    <div style="text-align: center; font-family: 'Times New Roman', serif; font-size: 12pt; font-weight: bold;"><u>POWER OF ATTORNEY</u></div>
    <div><br>
    </div>
    <div><br>
    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;"><font style="font-weight: bold;">KNOW ALL BY THESE PRESENTS</font>, that the undersigned hereby constitutes and appoints Michael J. Malecek,
      Karin L. Walker and Kevin&#160;J. Hickey, and their respective successors, and each of them the undersigned&#8217;s true and lawful attorneys-in-fact and agents with full power of substitution, signing singly, for the undersigned and in the undersigned&#8217;s name,
      place and stead, in any and all capacities, to:</div>
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          <td style="width: 22.5pt; vertical-align: top; font-family: 'Times New Roman', serif; font-size: 12pt;">1.</td>
          <td style="width: auto; vertical-align: top; text-align: justify;">
            <div style="font-family: 'Times New Roman', serif; font-size: 12pt;">prepare, execute in the undersigned&#8217;s name and on the undersigned&#8217;s behalf, and submit to the U.S. Securities and Exchange Commission (the &#8220;SEC&#8221;) a Form ID, including
              amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934
              (as amended, the &#8220;Exchange Act&#8221;) or any rule or regulation of the SEC;</div>
          </td>
        </tr>

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    </div>
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          <td style="width: 13.5pt;"><br>
          </td>
          <td style="width: 22.5pt; vertical-align: top; font-family: 'Times New Roman', serif; font-size: 12pt;">2.</td>
          <td style="width: auto; vertical-align: top; text-align: justify;">
            <div style="font-family: 'Times New Roman', serif; font-size: 12pt;">complete, execute and timely file for and on behalf of the undersigned, in the undersigned&#8217;s capacity as an officer and/or director of Prothena Corporation plc (the
              &#8220;Company&#8221;), Forms 3, 4 and 5, any other forms, and any amendments thereto in accordance with Section 16(a) of the Exchange Act and the rules and regulations thereunder; and</div>
          </td>
        </tr>

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    <div><br>
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    <table cellspacing="0" cellpadding="0" id="z6dd2b37e251043dbbd806d3e3d3e9c99" class="DSPFListTable" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

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          <td style="width: 22.5pt; vertical-align: top; font-family: 'Times New Roman', serif; font-size: 12pt;">3.</td>
          <td style="width: auto; vertical-align: top; text-align: justify;">
            <div style="font-family: 'Times New Roman', serif; font-size: 12pt;">take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or
              legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions
              as such attorney-in-fact may approve in such attorney-in-fact&#8217;s discretion.</div>
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    </table>
    <div><br>
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    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;">The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever
      requisite, necessary or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation,
      hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact&#8217;s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.&#160; The undersigned
      acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned&#8217;s responsibilities to comply with Section 16 of the Exchange Act.</div>
    <div><br>
    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;">The undersigned agrees that each such attorney-in-fact herein may rely entirely on information furnished orally or in writing by the
      undersigned to such attorney-in-fact.&#160; The undersigned also agrees to indemnify and hold harmless the Company and each such attorney-in-fact against any losses, claims, damages or liabilities (or actions in these respects) that arise out of or are
      based upon any untrue statements or omission of necessary facts in the information provided by the undersigned to such attorney-in fact for purposes of executing, acknowledging, delivering or filing Forms 3, 4 or 5, Form ID or any other form
      (including amendments thereto) and agrees to reimburse the Company and such attorney-in-fact for any legal or other expenses reasonably incurred in connection with investigating or defending against any such loss, claim, damage, liability or action.</div>
    <div><br>
    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;">This Power of Attorney supersedes any power of attorney previously executed by the undersigned regarding the purposes outlined in the first
      paragraph hereof (&#8220;Prior Powers of Attorney&#8221;), and the authority of the attorneys-in-fact named in any Prior Powers of Attorney is hereby revoked.</div>
    <div><br>
    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect
      to the undersigned&#8217;s holdings of and transactions in securities issued by the Company, unless earlier (a) revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact or (b) superseded by a new power of attorney
      regarding the purposes outlined in the first paragraph hereof dated as of a later date.</div>
    <div><br>
    </div>
    <div style="text-align: justify; text-indent: 36pt; font-family: 'Times New Roman', serif; font-size: 12pt;">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 21st day of February, 2024.</div>
    <div><br>
    </div>
    <div>
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              <div>&#160;</div>
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            <td style="width: 50%; font-size: 12pt;">Signature:&#160;&#160; <font style="font-family: 'Times New Roman',serif;"><u>/s/ Daniel G. Welch</u></font></td>
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              <div>&#160;</div>
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              <div style="font-size: 12pt;">Name:&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Daniel G. Welch <br>
              </div>
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