Arrowhead appoints Chief Financial Officer

Pasadena, CA -- Arrowhead Research Corporation (NASDAQ: ARWR) today announced that Ken Myszkowski has been appointed as the Company's Chief Financial Officer. Mr. Myszkowski brings to Arrowhead a broad range of finance and accounting experience spanning two decades in both the public and private sectors, including, most recently, senior level positions at two publicly traded energy companies and, earlier in his career, in two early stage technology companies.

"Ken is a great addition to Arrowhead's executive team," said Dr. Chris Anzalone, Arrowhead's CEO. "His experience in technology companies and strategic financial management make him an excellent fit for us, and I look forward to working with him to build Arrowhead in 2010 and beyond."

Prior to joining Arrowhead, Mr. Myszkowski served as the corporate controller for Broadwind Energy, a $200 million public energy company which provides products and services to the wind energy industry. Previous to his position at Broadwind, Mr. Myszkowski was controller for Epcor USA, the US headquarters for Epcor Utilities, Inc., a $4 billion public energy company.

Prior to Epcor, Mr. Myszkowski was controller for two start-up ventures, NanoInk, specializing in Dip Pen Nanolithography, a nanofabrication technology, and Delphion which provided on-line tools for intellectual property research. Mr. Myszkowski held several corporate roles at FMC Corporation, and Premark International, both Fortune 500 conglomerates. Mr. Myszkowski began his career in the audit practice of Arthur Andersen & Co. in Chicago, Illinois.

Mr. Myszkowski received his undergraduate degree from the University of Illinois, and his MBA from the University of Chicago Booth School of Business. Mr. Myszkowski is a certified public accountant.

Mr. Myszkowski succeeds Joseph T. Kingsley, who has been serving as Arrowhead's Chief Financial Officer on an interim basis since July 2009.

About Arrowhead Research Corporation

Arrowhead Research Corporation (www.arrowheadresearch.com) (NASDAQ: ARWR) is a nanotechnology company commercializing new technologies in the areas of life sciences, electronics, and energy. Arrowhead is seeking to build value for shareholders through the progress of majority owned subsidiaries. Currently, Arrowhead has four subsidiaries commercializing nanotech products and applications and minority investments in two privately held nanobiotech companies.