{"filing":{"accession_number":"0001477932-26-004731","cik":"0001588084","ticker":"TANH","company_name":"TANTECH HOLDINGS LTD","form":"6-K","filing_date":"2026-08-06","report_date":"2026-08-05","primary_document":"tanh_6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1588084/000147793226004731/tanh_6k.htm"},"events":[{"id":25765,"run_id":23385,"accession_number":"0001477932-26-004731","anchor_item_number":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"summary":"The 6-K discloses multiple executive and board changes effective August 2, 2026: appointment of Mr. Yongxin Su as director and Co-Chief Executive Officer, Ms. Bihua Liu as director and Co-Chief Financial Officer, Mr. Lei Yao as independent director and nominating committee chair, and Mr. Shipu Huang as independent director. While two directors also resigned (Zhang and Qian), the principal disclosed actions are the four new appointments to key governance and executive roles, making this an exec_appointment event. The appointments of two Co-CEOs and a Co-CFO are material to investor assessment of leadership and control.","company_name":"TANTECH HOLDINGS LTD","ticker":"TANH","filing_date":"2026-08-06","form":"6-K","submitted_at":null,"items":null}],"classifications":[{"id":26680,"accession_number":"0001477932-26-004731","item_number":null,"item_title":null,"event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"The 6-K discloses multiple executive and board changes effective August 2, 2026: appointment of Mr. Yongxin Su as director and Co-Chief Executive Officer, Ms. Bihua Liu as director and Co-Chief Financial Officer, Mr. Lei Yao as independent director and nominating committee chair, and Mr. Shipu Huang as independent director. While two directors also resigned (Zhang and Qian), the principal disclosed actions are the four new appointments to key governance and executive roles, making this an exec_appointment event. The appointments of two Co-CEOs and a Co-CFO are material to investor assessment of leadership and control.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-08-09T02:32:19.064726+00:00","company_name":"TANTECH HOLDINGS LTD","ticker":"TANH","filing_date":"2026-08-06"}]}