Zentalis Pharmaceuticals LLC is a clinical-stage biopharmaceutical company focused on discovering and developing clinically differentiated, novel small molecule therapeutics targeting fundamental biological pathways of cancer. It develops a broad pipeline of product candidates with an initial focus on validated oncology targets with the potential to address large patient populations. Its lead product candidate, ZN-c5, is an oral selective estrogen receptor degrader (SERD) for the treatment of estrogen receptor positive, human epidermal growth factor receptor 2-negative (ER+/HER2-) advanced or metastatic breast cancer. The company was founded by Kevin Bunker on December 23, 2014 and is headquartered in New York, NY.