X0306 4 2021-05-11 0 0001061027 Viracta Therapeutics, Inc. VIRX 0001846460 Rojkjaer Lisa C/O VIRACTA THERAPEUTICS, INC. 2533 S COAST HWY 101, SUITE 210 CARDIFF CA 92007 0 1 0 0 Chief Medical Officer Common Stock 2021-05-11 4 M 0 32689 1.26 A 32689 D Common Stock 2021-05-11 4 M 0 2061 3.58 A 34750 D Stock Option (Right to Buy) 1.26 2021-05-11 4 M 0 32689 0.00 D 2030-07-08 Common Stock 32689 98069 D Stock Option (Right to Buy) 3.58 2021-05-11 4 M 0 2061 0.00 D 2031-01-08 Common Stock 2061 30956 D Twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of May 1, 2020 (the "Vesting Commencement Date"), and one forty-eighth (1/48th ) of the total shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), subject to the reporting person continuing to be a Service Provider (as defined in the Viracta Subsidiary, Inc. 2016 Equity Incentive Plan, the "Plan") through each such date. One forty-eighth (1/48th ) of the Shares subject to the Option shall vest on February 28, 2021, and one forty-eighth (1/48th ) of the total Shares subject to the Option shall vest each month thereafter on the last day of such month, subject to the reporting person continuing to be a Service Provider (as defined in the Plan) through each such date. /s/ Michael Mueller, as Attorney-in-Fact 2021-05-13