Peregrine Pharmaceuticals, Inc. (Peregrine) is a biopharmaceutical company. The Company operates through two segments: Peregrine, which is engaged in the research and development of monoclonal antibodies for the treatment of cancer, and Avid, which is engaged in providing contract manufacturing services for third party customers on a fee-for-service basis while also supporting its internal drug development efforts. Bavituximab is its lead immunotherapy candidate. Bavituximab is a monoclonal antibody that targets and binds to phosphatidylserine (PS), a immunosuppressive molecule that is usually located inside the membrane of healthy cells, but then flips and becomes exposed on the outside of cells in the tumor microenvironment, causing the tumor to evade immune detection. The Company's subsidiary is Avid Bioservices, Inc. (Avid). Avid provides integrated current good manufacturing practices (cGMP) services from cell line development to commercial biomanufacturing.