X0609 4 2026-08-27 0001817241 Artiva Biotherapeutics, Inc. ARTV 0002065633 Banerjee Subhashis false C/O ARTIVA BIOTHERAPEUTICS, INC. 5505 MOREHOUSE DRIVE, SUITE 100 SAN DIEGO CA 92121 false true false false Chief Medical Officer true Common Stock 2026-08-27 4 M false 5306 1.92 A 150269 D Common Stock 2026-08-27 4 S false 8222 12.0087 D 142047 D Employee Stock Option (Right to Buy) 1.92 2026-08-27 4 M false 5306 0 D 2035-04-07 Common Stock 5306 74265 D The reported transactions occurred pursuant to a Rule 10b5-1 Plan adopted by the reporting person on May 14, 2026. The weighted average sale price for the transaction reported was $12.0087, and the range of prices were between $12.00 and $12.05, inclusive. Upon request by the SEC staff, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price will be provided. 25% of the shares initially subject to the option vested and became exercisable on April 8, 2026, and the balance of the shares subject to the option are vesting and becoming exercisable at a rate of 1/36th per month over the following 36 months. /s/ Andrew Cronauer, Attorney-in-Fact 2026-08-31