X0306 4 2022-06-09 0 0001676725 IDEAYA Biosciences, Inc. IDYA 0001207114 SHANNON TIMOTHY M C/O CANAAN PARTNERS 285 RIVERSIDE AVENUE, SUITE 250 WESTPORT CT 06880 1 0 0 0 Stock Option (right to buy) 12.29 2022-06-09 4 A 0 11000 0.00 A 2032-06-08 Common Stock 11000 11000 D 100% of the shares subject to the option shall vest in full on the earlier of (i) the first anniversary of the date of grant and (ii) immediately prior to the Annual Meeting following the date of grant, subject to the Reporting Person continuing in service on the Board through such vesting date. /s/ Janine MacDonald, Attorney-in-Fact for Timothy M. Shannon 2022-06-10