GRID DYNAMICS HLDGS INC

Ticker: GDYN CUSIP: 39813G109 Class: Common Stock

American Trust's Holding History (CIK: 0001905128)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 10,963 Value ($000) $99 Avg Close $8.66 Range $7.40 - $10.21

Q3 2025

Shares 11,051 Value ($000) $85 Avg Close $8.93 Range $7.37 - $12.86

Q1 2024

Shares 11,469 Value ($000) $141 Avg Close $13.05 Range $11.64 - $14.70

Q4 2023

Shares 12,088 Value ($000) $161 Avg Close $12.19 Range $9.92 - $14.24

Q3 2023

Shares 12,963 Value ($000) $158 Avg Close $11.09 Range $9.00 - $12.39

Q2 2023

Shares 11,777 Value ($000) $109 Avg Close $10.02 Range $8.00 - $13.15

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	10,963	$99	$8.66	$7.40 - $10.21
Q3 2025	11,051	$85	$8.93	$7.37 - $12.86
Q1 2024	11,469	$141	$13.05	$11.64 - $14.70
Q4 2023	12,088	$161	$12.19	$9.92 - $14.24
Q3 2023	12,963	$158	$11.09	$9.00 - $12.39
Q2 2023	11,777	$109	$10.02	$8.00 - $13.15