X0508 4 2025-12-23 0001743725 GRID DYNAMICS HOLDINGS, INC. GDYN 0001188321 BENHAMOU ERIC C/O GRID DYNAMICS HOLDINGS, INC. 6101 BOLLINGER CANYON ROAD, SUITE 465 SAN RAMON CA 94583 true false Common Stock 2025-12-23 4 A 0 19021 0 A 100898 D Common Stock 2025-12-23 4 A 0 8695 0 A 109593 D Common Stock 23500 I See footnote Common Stock 200000 I See footnote These securities are restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock. 100% of the RSUs shall vest on December 23, 2026, subject to the Reporting Person continuing as a service provider through such date. These securities are RSUs, each of which represents a contingent right to receive one share of Common Stock. One-quarter of the RSUs shall vest on March 23, 2026 and one-quarter shall vest on each three-month anniversary thereafter, subject to the Reporting Person continuing as a service provider in the same Grid Dynamics Holdings, Inc. board of directors and (if applicable) board committee roles through each such date. The shares are held by The Eric Benhamou Living Trust. The shares are held be The Eric Benhamou Grantor Retained Annuity Trust. /s/ Anil Doradla, by power of attorney 2025-12-29