X0306 4 2020-10-26 0 0001787400 Nkarta, Inc. NKTX 0001553354 Hager Alicia J. C/O NKARTA, INC. 6000 SHORELINE COURT, SUITE 102 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Legal Officer Stock Option (right to buy) 31.11 2020-10-26 4 A 0 150000 0.00 A 2030-10-25 Common Stock 150000 150000 D The option is scheduled to vest and become exercisable as to 25% of the shares subject to the grant on October 26, 2021. The remaining portion of the option is scheduled to vest and become exercisable in 36 equal monthly installments occurring on the completion of each successive month of the Reporting Person's service to the Issuer following October 26, 2021. /s/ Alicia J. Hager 2020-10-28