X0306 4 2021-01-08 0 0001787400 Nkarta, Inc. NKTX 0001309702 HASTINGS PAUL J C/O NKARTA, INC. 6000 SHORELINE COURT, SUITE 102 SOUTH SAN FRANCISCO CA 94080 1 1 0 0 Chief Executive Officer Stock Option (right to buy) 54.89 2021-01-08 4 A 0 157500 0.00 A 2031-01-07 Common Stock 157500 157500 D This option is scheduled to vest and become exercisable in 48 equal monthly installments occurring on the completion of each successive month of the Reporting Person's service to the Issuer following January 8, 2021. Exhibit List: Exhibit 24 - Power of Attorney /s/ Alicia Hager, as attorney-in-fact 2021-01-12