X0306 4 2022-06-15 0 0001810182 ALX ONCOLOGY HOLDINGS INC ALXO 0001921346 Canamasas Itziar C/O ALX ONCOLOGY HOLDINGS INC. 323 ALLERTON AVENUE SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Stock Option (right to buy) 6.67 2022-06-15 4 A 0 2000 0.00 A 2032-06-14 Common Stock 2000 2000 D Shares subject to the option vest in 12 equal monthly installments on the same day of the month as the grant date, or if earlier, the day immediately before the day of the next annual meeting of stockholders. /s/ Peter Garcia, by power of attorney 2022-06-16