Oncopeptides AB is a biotech company that engages in the research, development, and commercialization of targeted therapies for difficult-to-treat hematological diseases. The company's lead product is Pepaxti (melflufen), a peptide-drug conjugate for the treatment of relapsed or refractory multiple myeloma. Oncopeptides' proprietary Peptide Drug Conjugate (PDC) platform is designed to rapidly and selectively deliver cytotoxic agents into cancer cells.