Michael Christopher Southworth - 23 Dec 2025 Form 4 Insider Report for GRID DYNAMICS HOLDINGS, INC. (GDYN)

Role: Director
Signature: /s/ Anil Doradla, by power of attorney
Issuer symbol: GDYN
Transactions as of: 23 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 29 Dec 2025, 18:07:40 UTC
Previous filing: 26 Dec 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Southworth Michael Christopher	Director	C/O GRID DYNAMICS HOLDINGS, INC., 6101 BOLLINGER CANYON ROAD, SUITE 465, SAN RAMON	/s/ Anil Doradla, by power of attorney	29 Dec 2025	0001603604

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	GDYN	Common Stock	Award	$0	+12,500	+34%	$0.000000	48,810	23 Dec 2025	Direct	F1
transaction	GDYN	Common Stock	Award	$0	+6,521	+13%	$0.000000	55,331	23 Dec 2025	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	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.

Content

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.