ARROWHEAD PHARMACEUTICALS, INC. — Director's Dealing 2013

May 8, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ARROWHEAD RESEARCH CORP (ARWR)
CIK: 0000879407
Period of Report: 2013-05-06

Reporting Person: GIVEN BRUCE D (Chief Operating Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-06	Stock Option	$2.01	A	170000	Acquired	2023-05-06	Common Stock (170000)	Direct

Footnotes

F1: Option vests in 48 equal monthly installments beginning 06/01/13.