NATURAL GAS SERVICES GROUP INC

Stephen C. Taylor, our Chairman of the Board of Directors, adopted a Rule 10b5-1 trading agreement that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to an aggregate of 100,000 shares of the Company’s common stock, subject to various volume amounts and price thresholds. The plan became effective on August 21, 2024 and the plan provided that it would terminate on August 19, 2025, unless sooner terminated under its terms. The 10b5-1 Plan was entered into during an open insider trading window and no sales commenced under the plan until completion of the required cooling off period under Rule 10b5-1. The 10b5-1 Plan terminated pursuant to its terms on or about January 21, 2025, in connection with the final sale of shares covered by the plan.

No other director or officer of the Company adopted, modified orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408(a) of Regulation S-K, during the three months ended December 31, 2024.