On June 29, 2023, the Board of Directors of IDEAYA Biosciences, Inc. appointed Andres Ruiz Briseno as Principal Accounting Officer of the Company, effective July 1, 2023, in connection with the promotion of Mr. Briseno to Senior Vice President, Head of Finance and Investor Relations. Mr. Briseno, age 37, has over 10 years of finance and operations experience working with public and private life science companies. Mr. Briseno joined the Company as Vice President, Head of Business Operations and Investor Relations in November 2021.

From July 2021 to October 2021, Mr. Briseno was Senior Vice President, Finance & Principal Accounting Officer at Neumora Therapeutics, a biotechnology company. Previously, he held roles at the Company from August 2016 to July 2021, including most recently as Vice President, Finance. Prior to joining the Company in 2016, Mr. Briseno held several roles at Pharmacyclics, Inc., including as Associate Director, Financial Planning and Analysis.

Prior to that, Mr. Briseno held roles at Theravance, Inc., and in PricewaterhouseCoopers’ audit and assurance practice where he focused on life science and venture capital clients. Mr. Briseno obtained his B.S. in Business Administration with a concentration in Corporate Financial Management from San Jose State University and is a Certified Public Accountant, licensed in the state of California.