<SEC-DOCUMENT>0000932471-19-002258-index.html : 20190131
<SEC-HEADER>0000932471-19-002258.hdr.sgml : 20190131
<ACCEPTANCE-DATETIME>20190131152641
ACCESSION NUMBER:		0000932471-19-002258
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20190131
DATE AS OF CHANGE:		20190131

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Prothena Corp plc
		CENTRAL INDEX KEY:			0001559053
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			L2
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87112
		FILM NUMBER:		19555710

	BUSINESS ADDRESS:	
		STREET 1:		77 SIR JOHN ROGERSON'S QUAY, BLOCK C
		STREET 2:		GRAND CANAL DOCKLANDS
		CITY:			DUBLIN 2
		STATE:			L2
		ZIP:			D02 T804
		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 T804

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Neotope Corp Ltd
		DATE OF NAME CHANGE:	20120926

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			VANGUARD SPECIALIZED FUNDS
		CENTRAL INDEX KEY:			0000734383
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482
		BUSINESS PHONE:		6106691000

	MAIL ADDRESS:	
		STREET 1:		PO BOX 2600
		STREET 2:		V26
		CITY:			VALLEY FORGE
		STATE:			PA
		ZIP:			19482

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VANGUARD SPECIALIZED FUNDS/
		DATE OF NAME CHANGE:	20011121

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VANGUARD SPECIALIZED PORTFOLIOS INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>prothenacorpplc.htm
<TEXT>
Document 1 - file: prothenacorpplc.htm

</DOCUMENT>
</SEC-DOCUMENT>