X0407 4 2023-07-01 0 0001787400 Nkarta, Inc. NKTX 0001981854 Levin Alyssa C/O NKARTA, INC. 6000 SHORELINE COURT, SUITE 102 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 See Remarks 0 Stock Option (right to buy) 2.19 2023-07-01 4 A 0 442400 0.00 A 2033-06-30 Common Stock 442400 442400 D The option is scheduled to vest and become exercisable as to 25% of the shares subject to the grant on July 1, 2024. 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 July 1, 2024. Chief Financial and Business Officer /s/ Alicia Hager, as Attorney-in-Fact 2023-07-05