{"filing":{"accession_number":"0001084991-26-000064","cik":"0001084991","ticker":"NGS","company_name":"NATURAL GAS SERVICES GROUP INC","form":"8-K","filing_date":"2026-07-10","report_date":null,"primary_document":"ngs-20260709.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499126000064/ngs-20260709.htm"},"events":[{"id":17284,"run_id":15466,"accession_number":"0001084991-26-000064","anchor_item_number":"4.01","event_type":"auditor_change","event_domain":"governance","is_material":true,"confidence":0.98,"summary":"This is a clear auditor change under Item 4.01. HL\u0026B resigned as the independent registered public accounting firm on July 9, 2026, following its asset acquisition by CohnReznick, and the Board approved CohnReznick's appointment as the new auditor on the same date. The disclosure confirms no disagreements or reportable events occurred, indicating a routine transition rather than a dispute-driven change.","company_name":"NATURAL GAS SERVICES GROUP INC","ticker":"NGS","filing_date":"2026-07-10","form":"8-K","submitted_at":null,"items":[{"id":15663,"accession_number":"0001084991-26-000064","item_number":"4.01","item_title":null,"event_type":"auditor_change","event_domain":"governance","is_material":true,"confidence":0.98,"reasoning":"This is a clear auditor change under Item 4.01. HL\u0026B resigned as the independent registered public accounting firm on July 9, 2026, following its asset acquisition by CohnReznick, and the Board approved CohnReznick's appointment as the new auditor on the same date. The disclosure confirms no disagreements or reportable events occurred, indicating a routine transition rather than a dispute-driven change.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-10T18:02:36.416006+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":15663,"accession_number":"0001084991-26-000064","item_number":"4.01","item_title":null,"event_type":"auditor_change","event_domain":"governance","is_material":true,"confidence":0.98,"reasoning":"This is a clear auditor change under Item 4.01. HL\u0026B resigned as the independent registered public accounting firm on July 9, 2026, following its asset acquisition by CohnReznick, and the Board approved CohnReznick's appointment as the new auditor on the same date. The disclosure confirms no disagreements or reportable events occurred, indicating a routine transition rather than a dispute-driven change.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-07-10T18:02:36.416006+00:00","company_name":"NATURAL GAS SERVICES GROUP INC","ticker":"NGS","filing_date":"2026-07-10"}]}