On February 1, 2021, Karen C. Lam, Vice President, Finance and Corporate Controller and principal accounting officer of RAPT Therapeutics, Inc. (the “Company”), delivered notice of her resignation from these positions and from her employment with the Company, to be effective on February 28, 2021, in order to pursue a leadership opportunity with a privately-held biotechnology company. On February 4, 2021, the Company appointed Rodney Young to serve as the Company’s principal accounting officer, effective upon Ms. Lam’s resignation and departure from the Company. Mr. Young has been the Company’s Chief Financial Officer since joining the Company in December 2019.