X0609 4 2026-06-16 0001676725 IDEAYA Biosciences, Inc. IDYA 0001662426 Morrison Scott W false C/O IDEAYA BIOSCIENCES, INC. 5000 SHORELINE COURT, SUITE 300 SOUTH SAN FRANCISCO CA 94080 true false Stock Option (right to buy) 30.57 2026-06-16 4 A 0 20000 0 A 2036-06-16 Common Stock 20000 20000 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/ Andres Ruiz Briseno, as Attorney-in-Fact for Scott W. Morrison 2026-06-18