RAPT Therapeutics, Inc. is a clinical-stage biopharmaceutical firm specializing in immunology. The company is dedicated to discovering, developing, and commercializing innovative oral small molecule therapies. These treatments are aimed at addressing critical unmet medical needs for patients battling oncology and inflammatory diseases. Its primary drug candidate for inflammation, RPT193, functions as a C-C motif chemokine receptor 4 (CCR4) antagonist. This compound works by selectively preventing type 2 T helper cells from migrating into inflamed tissues. In the oncology pipeline, FLX475 stands as the company's leading candidate, also an oral small molecule CCR4 antagonist. This therapy is currently undergoing Phase 1/2 clinical trials to evaluate its efficacy both as a standalone treatment and in combination with pembrolizumab for individuals with advanced cancer. RAPT Therapeutics is also engaged in the development of a hematopoietic progenitor kinase 1 (HPK1) inhibitor. Founded in 2015, the company initially operated as FLX Bio, Inc. before rebranding as RAPT Therapeutics, Inc. in May 2019. Its corporate headquarters are situated in South San Francisco, California.