X0508 4 2025-09-26 0 0001084991 NATURAL GAS SERVICES GROUP INC NGS 0001316004 Taylor Stephen Charles 404 VETERANS AIRPARK LANE SUITE 300 MIDLAND TX 79705 1 0 0 0 1 Common Stock 2025-09-26 4 S 0 7915 28.5011 D 375432 D Common Stock 114213 I Rabbi Trust Restricted Stock Units Common Stock 4456 4456 D The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.50 to $28.53 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote. Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting. Stephen C. Taylor 2025-09-26