X0508 4 2024-01-04 0 0001787400 Nkarta, Inc. NKTX 0001309702 HASTINGS PAUL J C/O NKARTA, INC. 1150 VETERANS BOULEVARD SOUTH SAN FRANCISCO CA 94080 1 1 0 0 Chief Executive Officer 0 Common Stock 2024-01-04 4 A 0 85000 0.00 A 400204 D Stock Option (right to buy) 6.01 2024-01-04 4 A 0 509500 0.00 A 2034-01-03 Common Stock 509500 509500 D Represents Restricted Stock Units ("RSUs") which vest in four equal annual installments beginning on January 14, 2025. Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. Includes 1,802 shares acquired under the Issuer's 2020 Employee Stock Purchase Plan on November 30, 2023. 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 14, 2024. /s/ Alicia Hager, as Attorney-in-Fact 2024-01-08