Lundin Law PC, a shareholder rights firm, announces that it is investigating claims against Arrowhead Pharmaceuticals, Inc. ("Arrowhead" or the "Company") (Nasdaq: ARWR) concerning possible violations of federal securities laws. To get more information about this investigation, please contact Brian Lundin, Esquire, of Lundin Law PC, at 888-713-1033, or by email at firstname.lastname@example.org. The investigation focuses on the November 8, 2016 announcement where Arrowhead revealed that the U.S. Food & Drug Administration will be placing a clinical hold on its Heparc-2004 clinical study of ARC-520, likely due to deaths at the highest dose of an ongoing non-human primate toxicology study. Lundin Law PC was founded by Brian Lundin, a securities litigator based in Los Angeles dedicated to upholding shareholders' rights. This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.