{"filing":{"accession_number":"0001477932-26-005179","cik":"0001588084","ticker":"TANH","company_name":"TANTECH HOLDINGS LTD","form":"6-K","filing_date":"2026-08-19","report_date":"2026-08-19","primary_document":"tanh_6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1588084/000147793226005179/tanh_6k.htm"},"events":[{"id":28594,"run_id":26163,"accession_number":"0001477932-26-005179","anchor_item_number":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.85,"summary":"The 6-K discloses the appointment of two independent directors to the Board effective August 12, 2026: Mr. Jiwen Huang and Mr. Chuanjiang Xiao, both elected to fill vacancies and serve on the nominating committee. While the filing also mentions two director resignations (Wang and Liao), the principal disclosed action is the appointment of new directors to fill those vacancies, making this an exec_appointment event. Board composition changes are material to investors assessing governance and oversight.","company_name":"TANTECH HOLDINGS LTD","ticker":"TANH","filing_date":"2026-08-19","form":"6-K","submitted_at":null,"items":null}],"classifications":[{"id":30590,"accession_number":"0001477932-26-005179","item_number":null,"item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.85,"reasoning":"The 6-K discloses the appointment of two independent directors to the Board effective August 12, 2026: Mr. Jiwen Huang and Mr. Chuanjiang Xiao, both elected to fill vacancies and serve on the nominating committee. While the filing also mentions two director resignations (Wang and Liao), the principal disclosed action is the appointment of new directors to fill those vacancies, making this an exec_appointment event. Board composition changes are material to investors assessing governance and oversight.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-08-19T21:04:56.215434+00:00","company_name":"TANTECH HOLDINGS LTD","ticker":"TANH","filing_date":"2026-08-19"}]}