Cellectar Biosciences, Inc., a clinical stage biopharmaceutical company, engages in the discovery, development, and commercialization of drugs for the treatment of cancer. Its lead phospholipid drug conjugate (PDC) therapeutic, CLR 131, is in a Phase 1 clinical study in patients with relapsed or refractory (R/R) multiple myeloma (MM) and a Phase 2 clinical study in R/R MM and a range of B-cell malignancies. The company's product pipeline also includes two preclinical PDC chemotherapeutic programs, which include CLR 1700 that is designed to treat a broad range of hematologic cancers; and CLR 1900, which is targeted to treat select solid tumors. It also has collaborative PDC programs with Pierre Fabre to develop CLR 1800 Series; Avicenna Oncology GMBH to develop CLR 2000 Series; Onconova Therapeutics, Inc. to develop CLR 2100 and 2200 Series; and Orano Med to develop phospholipid drug conjugates. The company was formerly known as Novelos Therapeutics, Inc. and changed its name to Cellectar Biosciences, Inc. in February 2014. Cellectar Biosciences, Inc. was founded in 2002 and is headquartered in Madison, Wisconsin.