X0206 3 2023-01-01 0 0001787400 Nkarta, Inc. NKTX 0001959742 Shook David C/O NKARTA, INC. 6000 SHORELINE COURT, SUITE 102 SOUTH SAN FRANCISCO CA 94080 0 1 0 0 Chief Medical Officer Common Stock 22977 D Stock Option (right to buy) 18.00 2030-07-08 Common Stock 13300 D Stock Option (right to buy) 18.00 2030-07-08 Common Stock 4300 D Stock Option (right to buy) 18.00 2030-07-08 Common Stock 4800 D Stock Option (right to buy) 54.89 2031-01-07 Common Stock 4680 D Stock Option (right to buy) 31.85 2031-04-29 Common Stock 150 D Stock Option (right to buy) 12.14 2032-01-13 Common Stock 3310 D Stock Option (right to buy) 18.44 2032-04-28 Common Stock 5000 D Stock Option (right to buy) 13.86 2032-05-15 Common Stock 7000 D Stock Option (right to buy) 12.25 2032-06-16 Common Stock 35000 D Stock Option (right to buy) 16.46 2032-08-19 Common Stock 30000 D Includes 1,660 Restricted Stock Units ("RSUs") which vest in four equal annual installments beginning on January 14, 2023, 5,000 RSUs which vest in four equal annual installments beginning on June 17, 2023, and 15,000 RSUs which vest in four equal annual installments beginning on August 20, 2023. Each RSU represents a contingent right to receive one share of Common Stock of the Issuer. The option is vested and exercisable as to 8,589 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on June 1, 2024. The option is vested and exercisable as to 2,687 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on July 1, 2024. The option is vested and exercisable as to 3,000 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on July 9, 2024. The option is vested and exercisable as to 2,340 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on January 8, 2025. The option is vested and exercisable as to 62 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on April 30, 2025. The option is vested and exercisable as to 759 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on January 14, 2026. The option is vested and exercisable as to 833 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on April 29, 2026. The option is vested and exercisable as to 1,021 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on May 16, 2026. The option is vested and exercisable as to 4,375 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on June 17, 2026. The option is vested and exercisable as to 2,500 shares, and the remaining shares will vest and become exercisable ratably in monthly installments until fully vested on August 20, 2026. /s/ Alicia Hager, as Attorney-in-Fact 2023-01-10