<SEC-DOCUMENT>0000891092-19-000538-index.html : 20190110
<SEC-HEADER>0000891092-19-000538.hdr.sgml : 20190110
<ACCEPTANCE-DATETIME>20190110161431
ACCESSION NUMBER:		0000891092-19-000538
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20190110
DATE AS OF CHANGE:		20190110
GROUP MEMBERS:		JEREMY MINDICH
GROUP MEMBERS:		MATTHEW SIROVICH
GROUP MEMBERS:		SCOPIA MANAGEMENT, INC.

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
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-87112
		FILM NUMBER:		19520396

	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:			SCOPIA CAPITAL MANAGEMENT LP
		CENTRAL INDEX KEY:			0001279150
		IRS NUMBER:				300711986
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		152 WEST 57TH STREET
		STREET 2:		33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		212-370-0303

	MAIL ADDRESS:	
		STREET 1:		152 WEST 57TH STREET
		STREET 2:		33RD FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCOPIA CAPITAL MANAGEMENT LLC
		DATE OF NAME CHANGE:	20130211

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCOPIA FUND MANAGEMENT LLC
		DATE OF NAME CHANGE:	20130116

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SCOPIA FUND MANAGEMENT, LLC
		DATE OF NAME CHANGE:	20120410
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>e3458sc13g.htm
<DESCRIPTION>SCHEDULE 13G
<TEXT>
Document 1 - file: e3458sc13g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>e3458ex99-1.htm
<DESCRIPTION>JOINT FILING AGREEMENT
<TEXT>
Document 2 - file: e3458ex99-1.htm

</DOCUMENT>
</SEC-DOCUMENT>