Cellectar Biosciences, Inc., a development stage biopharmaceutical company, develops compounds for the treatment and imaging of cancer. Its proprietary product candidates include I-124-CLR1404, a small-molecule, broad-spectrum, and cancer-targeting positron emission tomography (PET) imaging agent that is in Phase II clinical trial for glioblastoma, as well as in Phase I/II clinical trials for approximately 11 solid tumor indications; and CLR1502, a preclinical, cancer-targeted, and non-radioactive optical imaging agent for intraoperative tumor margin illumination and non-invasive tumor imaging. The company also develops I-131-CLR1404, a small-molecule, broad-spectrum, and cancer-targeted molecular radiotherapeutic that delivers cytotoxic radiation directly and selectively to cancer cells and cancer stem cells, as well as is in Phase Ib dose-escalation trial for patients with advanced solid tumors; and CLR1404, a cancer-targeted chemotherapy. 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.