X0206 3 2022-02-03 0 0001786205 Arcellx, Inc. ACLX 0001789632 Heery Christopher C/O ARCELLX, INC. 25 WEST WATKINS MILL ROAD, SUITE A GAITHERSBURG MD 20878 0 1 0 0 Chief Medical Officer Stock Option (right to buy) 6.28 2031-06-09 Common Stock 261623 D Stock Option (right to buy) 6.28 2031-06-09 Common Stock 29069 D Shares issued pursuant to the Issuer's 2017 Equity Incentive Plan (the "2017 Plan"). Subject to the Reporting Person continuing to be a Service Provider (as defined 2017 Plan) through each applicable date, twenty-five percent (25%) of the shares subject to the option shall vest on the one (1) year anniversary of the Vesting Commencement Date, and one forty-eighth (1/48th) of the 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). "Vesting Commencement Date" shall mean April 26, 2021. Shares issued pursuant to the Issuer's 2017 Equity Incentive Plan (the "2017 Plan"). Subject to the Reporting Person continuing to be a Service Provider (as defined 2017 Plan) through each applicable date, one forty-eighth (1/48th) of the shares subject to the option shall vest each month following the Vesting Commencement Date 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). "Vesting Commencement Date" shall mean June 9, 2021. Exhibit 24 - Power of Attorney /s/ Lance Thibault, as Attorney-in-Fact 2022-02-03