As previously announced, on July 31, 2018, the Board of Directors of aTyr Pharma, Inc. appointed Jill M. Broadfoot, the Company’s Chief Financial Officer, as the company’s principal financial officer and principal accounting officer, replacing Stan Blackburn in these positions, effective as of August 15, 2018. On July 31, 2018, the company also accepted Mr. Blackburn’s resignation from these positions, effective as of August 15, 2018. Following his resignation from these positions on August 15, 2018, Mr. Blackburn continues to serve as a financial consultant to the Company.