EX-23.1 9 d265091dex231.htm CONSENT OF INDEPENDENT PUBLIC REGISTERED ACCOUNTING FIRM

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Annual Report on Form 10-K of Arrowhead Research Corporation for the year ended September 30, 2011 of our report dated December 16, 2011 included in its Registration Statements on Forms S-3 (Nos. 333-178532, 333-178073, 333-178072, 333-176159, 333-164039, 333-161344, 333-148218, 333-144109, 333-137329, 333-132310, 333-124065, and 333-113065) and Forms S-8 (Nos. 333-170252, 333-136225, 333-124066, and 333-120072) relating to the consolidated financial statements of Arrowhead Research Corporation and Subsidiaries for the year ended September 30, 2010.

Rose, Snyder & Jacobs

A Corporation of Certified Public Accountants

Encino, California

/s/ Rose, Snyder & Jacobs

December 16, 2011