    <SEC-DOCUMENT>0001193125-20-007280-index.html : 20200114
    <SEC-HEADER>0001193125-20-007280.hdr.sgml : 20200114
    <ACCEPTANCE-DATETIME>20200114170005
    ACCESSION NUMBER:		0001193125-20-007280
    CONFORMED SUBMISSION TYPE:	PRE 14A
    PUBLIC DOCUMENT COUNT:		9
    CONFORMED PERIOD OF REPORT:	20200319
    FILED AS OF DATE:		20200114
    DATE AS OF CHANGE:		20200114

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ARROWHEAD PHARMACEUTICALS, INC.
    		CENTRAL INDEX KEY:			0000879407
    		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
    		IRS NUMBER:				460408024
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0930

    	FILING VALUES:
    		FORM TYPE:		PRE 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-38042
    		FILM NUMBER:		20526524

    	BUSINESS ADDRESS:
    		STREET 1:		225 SOUTH LAKE AVENUE
    		STREET 2:		SUITE 1050
    		CITY:			PASADENA
    		STATE:			CA
    		ZIP:			91101
    		BUSINESS PHONE:		626-304-3400

    	MAIL ADDRESS:
    		STREET 1:		225 SOUTH LAKE AVENUE
    		STREET 2:		SUITE 1050
    		CITY:			PASADENA
    		STATE:			CA
    		ZIP:			91101

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ARROWHEAD RESEARCH CORP
    		DATE OF NAME CHANGE:	20040112

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	INTERACTIVE GROUP INC
    		DATE OF NAME CHANGE:	20020509

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	INTERACTIVE INC
    		DATE OF NAME CHANGE:	19940224
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>PRE 14A
    <SEQUENCE>1
    <FILENAME>d864868dpre14a.htm
    <DESCRIPTION>PRE 14A
    <TEXT>
    Document 1 - file: d864868dpre14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>g864868g01r22.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g864868g01r22.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>g864868g02m66.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g864868g02m66.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g864868g03z11.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g864868g03z11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>g864868g08m78.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g864868g08m78.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g864868g27e04.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g864868g27e04.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g864868g70d20.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g864868g70d20.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g864868page006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g864868page006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g864868page007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g864868page007.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>