GRID DYNAMICS HLDGS INC

Ticker: GDYN CUSIP: 39813G109 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2025
Shares 11,949 Value ($000) $108 Avg Close $8.66 Range $7.40 - $10.21
Q3 2025
Shares 1,049 Value ($000) $8 Avg Close $8.93 Range $7.37 - $12.86
Q2 2025
Shares 928 Value ($000) $11 Avg Close $13.15 Range $11.08 - $15.88
Q4 2024
Shares 182 Value ($000) $4 Avg Close $17.46 Range $13.77 - $24.16
Q1 2024
Shares 82 Value ($000) $1 Avg Close $13.05 Range $11.64 - $14.70
Q4 2023
Shares 82 Value ($000) $1 Avg Close $12.19 Range $9.92 - $14.24
Q4 2022
Shares 1,390 Value ($000) $16 Avg Close $12.97 Range $10.13 - $20.12
Q3 2022
Shares 16,502 Value ($000) $309 Avg Close $18.95 Range $15.77 - $24.27
Q2 2022
Shares 3,449 Value ($000) $58 Avg Close $16.34 Range $13.26 - $21.10
Q3 2021
Shares 3,015 Value ($000) $88 Avg Close $24.45 Range $15.29 - $32.69