NATURAL GAS SERVICES GROUP

Ticker: NGS CUSIP: 63886Q109 Class: Common Stock

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q4 2025
Shares 12,432 Value ($000) $418 Avg Close $29.70 Range $25.36 - $34.47
Q1 2024
Shares 29 Value ($000) $0 Avg Close $15.93 Range $13.55 - $19.94
Q4 2023
Shares 104 Value ($000) $0 Avg Close $14.30 Range $12.61 - $16.27
Q3 2023
Shares 558 Value ($000) $0 Avg Close $10.78 Range $9.52 - $15.23
Q4 2022
Shares 21,686 Value ($000) $0 Avg Close $10.80 Range $9.88 - $12.25
Q1 2022
Shares 466 Value ($000) $5 Avg Close $11.42 Range $9.74 - $13.89
Q4 2021
Shares 375 Value ($000) $3 Avg Close $11.19 Range $9.41 - $12.83
Q1 2021
Shares 2,138 Value ($000) $20 Avg Close $9.42 Range $7.92 - $10.65
Q4 2020
Shares 2,494 Value ($000) $23 Avg Close $9.94 Range $8.27 - $12.10
Q3 2020
Shares 693 Value ($000) $5 Avg Close $7.49 Range $6.05 - $10.02
Q3 2019
Shares 194 Value ($000) $2 Avg Close $13.56 Range $10.11 - $16.51
Q2 2019
Shares 73 Value ($000) $1 Avg Close $16.22 Range $14.71 - $18.54
Q1 2019
Shares 1,554 Value ($000) $26 Avg Close $17.65 Range $15.90 - $19.02
Q2 2018
Shares 684 Value ($000) $16 Avg Close $23.87 Range $21.47 - $26.42
Q2 2016
Shares 208 Value ($000) $4 Avg Close $22.14 Range $19.61 - $25.27