Results of Operations and Financial Condition. On August 11, 2026, Natural Gas Services Group, Inc. (the “Company”) hosted an earnings call to announce the Company’s financial results for the second quarter ended June 30, 2026, and provide certain other financial and business information, along with forward guidance. A copy of the earnings call transcript is attached hereto as Exhibit 99.1 and incorporated herein by reference.

of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing. The replay of the earnings call may also be found on our website at https…

Results of Operations and Financial Condition. On August 10, 2026, Natural Gas Services Group, Inc. (the “Company”) issued a press release announcing its results of operations for three months ended June 30, 2026. The press release issued August 10, 2026 is furnished as Exhibit No. 99.1 to this Current Report on Form 8-K. Natural Gas Services Group’s annual report on Form 10-K and its reports on Forms 10-Q and 8-K and other publicly available information should be consulted for other importan…

Other Events On August 10, 2026, the Company announced that its Board of Directors has declared a cash dividend of $0.15 per share of common stock. This cash dividend will be paid on September 2, 2026, to all shareholders of record as of the close of business on August 19, 2026.

Material Modification of Rights of Security Holders As previously reported on Form 8-K filed with the Securities and Exchange Commission (the “SEC”) on June 11, 2026, at the Company’s 2026 Annual Meeting of Shareholders held on June 10, 2026, shareholders holding a majority of the outstanding shares of the Company’s common stock entitled to vote thereon approved and adopted the redomestication of the Company from the State of Colorado to the State of Texas (the “Redomestication ”) by means of…

Entry into a Material Definitive Agreement. On July 20, 2026, Natural Gas Services Group, Inc. (the “Company”) entered into indemnification agreements (the “Indemnification Agreements”) with each of its directors and executive officers (collectively, the “Indemnitees”), effective as of July 20, 2026, which replaced and superseded any previous indemnification agreements between the Company and each such individual. The Indemnification Agreements provide for certain indemnification and advancem…

Changes in Registrant's Certifying Accountant. (a) On July 9, 2026, Natural Gas Services Group, Inc., (the “Company”) was advised by Ham, Langston & Brezina, L.L.P. (“HL&B”), the Company’s independent registered public accounting firm, that HL&B completed a transaction pursuant to which, among other things, CohnReznick LLP (“CohnReznick”) acquired certain assets of HL&B. In connection with the closing of this transaction, on July 9, 2026, HL&B resigned as the Company’s independent registered…

Completion of Acquisition or Disposition of Assets. The information set forth in

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

The issuance of the Equity Consideration to the Sellers was completed in reliance upon the exemption from the registration requirements of the Securities Act of 1933, as amended (the "Securities Act"), provided by Section 4(a)(2) thereof as a transaction by an issuer not involving any public offering. The Company relied on this exemption from registration based in part on representations made by the Sellers.

Entry into a Material Definitive Agreement. Flatrock Acquisition On June 12, 2026, Natural Gas Services Group, Inc., a Colorado corporation (the “Company”), entered into a Securities Purchase Agreement (the “Purchase Agreement”) with Flatrock Compression Holdings LLC, a Delaware limited liability company (“Flatrock”), the holders of all of the membership interests of Flatrock (each, a “Seller” and, collectively, the “Sellers”), and Mule Deer Sky LLC, a Texas limited liability company, solely…

Entry into a Material Definitive Agreement. In connection with the election of John E. Jackson to the Board of Directors (the “Board”) of Natural Gas Services Group, Inc. (the “Company”) at the 2026 annual meeting of shareholders (the “Meeting”) of the Company discussed below in Item 5.07, on June 10, 2026, the Company entered into an indemnification agreement with Mr. Jackson (the “Indemnification Agreement”) pursuant to which the Company agreed to indemnify Mr. Jackson in connection with cl…

Results of Operations and Financial Condition. On May 12, 2026, Natural Gas Services Group, Inc. (the “Company”) hosted an earnings call to announce the Company’s financial results for the first quarter ended March 31, 2026, and provide certain other financial and business information, along with forward guidance. A copy of the earnings call transcript is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Results of Operations and Financial Condition. On May 11, 2026, Natural Gas Services Group, Inc. (the “Company”) issued a press release announcing its results of operations for three months ended March 31, 2026. The press release issued May 11, 2026 is furnished as Exhibit No. 99.1 to this Current Report on Form 8-K. Natural Gas Services Group’s annual report on Form 10-K and its reports on Forms 10-Q and 8-K and other publicly available information should be consulted for other important inf…

Other Events On May 11, 2026, the Company announced that its Board of Directors has declared a cash dividend of $0.15 per share of common stock. This cash dividend will be paid on June 3, 2026, to all shareholders of record as of the close of business on May 20, 2026.

Results of Operations and Financial Condition. On March 17 2026, Natural Gas Services Group, Inc. (the “Company”) hosted an earnings call to announce the Company’s financial results for the three months and year ended December 31, 2025, and provide certain other financial and business information, along with forward guidance. A copy of the earnings call transcript is attached hereto as Exhibit 99.1 and incorporated herein by reference.

of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing. The replay of the earnings call may also be found on our website at https…

Results of Operations and Financial Condition. On March 16, 2026, Natural Gas Services Group, Inc. (the “Company”) issued a press release announcing its results of operations for three months and full year ended December 31, 2025. The press release issued March 16, 2026 is furnished as Exhibit No. 99.1 to this Current Report on Form 8-K. Natural Gas Services Group’s annual report on Form 10-K and its reports on Forms 10-Q and 8-K and other publicly available information should be consulted fo…

Other Events On February 9, 2026, the Company announced that its Board of Directors has declared a cash dividend of $0.11 per share of common stock, or $0.44 per share of common stock on an annualized basis. This cash dividend will be paid on March 4, 2026, to all shareholders of record as of the close of business on February 18, 2026.

Regulation FD Disclosure On February 9, 2026, the Company issued a press release announcing its Board of Directors has declared a quarterly cash dividend of $0.11 per share of common stock. A copy of the press release is attached as an exhibit to this Current Report on Form 8-K. The press release filed herewith as Exhibit 99.1 is being furnished and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exchange Act ”), or ot…

Director — Stephen C. Taylor: Mr. Taylor decided to retire and will not seek re-election as a member of the Board of Directors.

Results of Operations and Financial Condition. On November 11, 2025, Natural Gas Services Group, Inc. (the “Company”) hosted an earnings call to announce the Company’s financial results for the third quarter ended September 30, 2025, and provide certain other financial and business information, along with forward guidance. A copy of the earnings call transcript is attached hereto as Exhibit 99.1 and incorporated herein by reference.

Results of Operations and Financial Condition. On November 10, 2025, Natural Gas Services Group, Inc. (the “Company”) issued a press release announcing its results of operations for third quarter ended September 30, 2025. The press release issued November 10, 2025 is furnished as Exhibit No. 99.1 to this Current Report on Form 8-K. Natural Gas Services Group’s annual report on Form 10-K and its reports on Forms 10-Q and 8-K and other publicly available information should be consulted for othe…

Other Events. On November 10, 2025, the Company announced that its Board of Directors has declared a quarterly cash dividend of $0.11 per share of common stock. This cash dividend is expected to be paid on December 3, 2025 to all shareholders of record as of the close of business on November 20, 2025.

Results of Operations and Financial Condition. On August 12, 2025, Natural Gas Services Group, Inc. (the “Company”) hosted an earnings call to announce the Company’s financial results for the second quarter ended June 30, 2025, and provide certain other financial and business information, along with forward guidance. A copy of the earnings call transcript is attached hereto as Exhibit 99.1 and incorporated herein by reference.