    <SEC-DOCUMENT>0001104659-18-063178-index.html : 20181022
    <SEC-HEADER>0001104659-18-063178.hdr.sgml : 20181022
    <ACCEPTANCE-DATETIME>20181022083702
    ACCESSION NUMBER:		0001104659-18-063178
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		16
    CONFORMED PERIOD OF REPORT:	20181022
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20181022
    DATE AS OF CHANGE:		20181022

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Protagonist Therapeutics, Inc
    		CENTRAL INDEX KEY:			0001377121
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				980505495
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-37852
    		FILM NUMBER:		181131587

    	BUSINESS ADDRESS:
    		STREET 1:		7707 GATEWAY BLVD., SUITE 140
    		CITY:			NEWARK
    		STATE:			CA
    		ZIP:			94560-1160
    		BUSINESS PHONE:		(510) 474-0170

    	MAIL ADDRESS:
    		STREET 1:		7707 GATEWAY BLVD., SUITE 140
    		CITY:			NEWARK
    		STATE:			CA
    		ZIP:			94560-1160

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Protagonist Therapeutics Inc
    		DATE OF NAME CHANGE:	20130605

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Protagonist Inc
    		DATE OF NAME CHANGE:	20061002
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>a18-37039_18k.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: a18-37039_18k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a18-37039_1ex99d1.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: a18-37039_1ex99d1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g370391mmi001.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g370391mmi001.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g370391mmi002.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g370391mmi002.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g370391mmi003.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g370391mmi003.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g370391mmi004.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g370391mmi004.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g370391mmi005.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g370391mmi005.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g370391mmi006.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g370391mmi006.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g370391mmi007.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g370391mmi007.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g370391mmi008.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g370391mmi008.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g370391mmi009.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g370391mmi009.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g370391mmi010.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g370391mmi010.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g370391mmi011.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g370391mmi011.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g370391mmi012.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g370391mmi012.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>g370391mmi013.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g370391mmi013.gif

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>g370391mmi014.gif
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g370391mmi014.gif

    </DOCUMENT>
    </SEC-DOCUMENT>