GRID DYNAMICS HLDGS INC

Ticker: GDYN CUSIP: 39813G109 Class: Common Stock

SUMMIT SECURITIES GROUP LLC's Holding History (CIK: 0001531593)

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

Q4 2025

Shares 192 Value ($000) $2 Avg Close $8.66 Range $7.40 - $10.21

Q2 2025

Shares 1,987 Value ($000) $23 Avg Close $13.15 Range $11.08 - $15.88

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	192	$2	$8.66	$7.40 - $10.21
Q2 2025	1,987	$23	$13.15	$11.08 - $15.88