Kronos Bio, Inc., a clinical-stage biopharmaceutical company, focuses on the discovery and development of therapeutics for various cancer and other serious diseases in the United States. Its lead product candidates are KB-0742, an oral cyclin dependent kinase 9 inhibitor for the treatment of MYC-amplified solid tumors, which is in phase 2 clinical trial; and KB-9558, a core oncogenic transcription factor that drives multiple myeloma. The company was incorporated in 2017 and is headquartered in San Mateo, California.