<SEC-DOCUMENT>0001193125-18-019881-index.html : 20180125
<SEC-HEADER>0001193125-18-019881.hdr.sgml : 20180125
<ACCEPTANCE-DATETIME>20180125170356
ACCESSION NUMBER:		0001193125-18-019881
CONFORMED SUBMISSION TYPE:	DEFA14A
PUBLIC DOCUMENT COUNT:		5
FILED AS OF DATE:		20180125
DATE AS OF CHANGE:		20180125
EFFECTIVENESS DATE:		20180125

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:		DEFA14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38042
		FILM NUMBER:		18548965

	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>
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<TYPE>DEFA14A
<SEQUENCE>1
<FILENAME>d441046ddefa14a.htm
<DESCRIPTION>DEFA14A
<TEXT>
Document 1 - file: d441046ddefa14a.htm

</DOCUMENT>
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<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g441046dsp003.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g441046dsp003.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g441046dsp004.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g441046dsp004.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g441046dsp005.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g441046dsp005.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g441046dsp006.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g441046dsp006.jpg

</DOCUMENT>
</SEC-DOCUMENT>