RayzeBio, Inc. develops radiopharmaceutical therapeutics (RPT) for the treatment of cancer. The company's lead drug candidate is RYZ101, which is in phase 3 clinical trial for the treatment of gasteroenteropancreatic neuroendocrine tumors (GEP-NETs). It also develops RYZ801, a novel proprietary peptide that targets GPC3 for delivery of Ac225 for the treatment of hepatocellular carcinoma (HCC); RYZ811, a paired diagnostic imaging agent with the peptide binder, chelator, and Ga68 as the radioisotope; and a novel proprietary small molecule that targets CA9 for delivery of Ac225 for the treatment of ccRCC. The company was incorporated in 2020 and is based in San Diego, California. As of February 26, 2024, RayzeBio, Inc. operates as a subsidiary of Bristol-Myers Squibb Company.