{"filing":{"accession_number":"0001637880-26-000044","cik":"0001637880","ticker":null,"company_name":"Tri-State Generation \u0026 Transmission Association, Inc.","form":"8-K","filing_date":"2026-09-23","report_date":"2026-09-22","primary_document":"tris-20260922.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1637880/000163788026000044/tris-20260922.htm"},"events":[{"id":34678,"run_id":31921,"accession_number":"0001637880-26-000044","anchor_item_number":"5.02","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"summary":"Amy Miller was elected as a director representing Wheatland Rural Electric Association on Tri-State's Board of Directors, effective September 22, 2026. This is a director appointment disclosed under Item 5.02, and board composition changes are material to investors assessing governance and oversight.","company_name":"Tri-State Generation \u0026 Transmission Association, Inc.","ticker":null,"filing_date":"2026-09-23","form":"8-K","submitted_at":null,"items":[{"id":38490,"accession_number":"0001637880-26-000044","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"Amy Miller was elected as a director representing Wheatland Rural Electric Association on Tri-State's Board of Directors, effective September 22, 2026. This is a director appointment disclosed under Item 5.02, and board composition changes are material to investors assessing governance and oversight.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-23T21:31:56.038044+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":38490,"accession_number":"0001637880-26-000044","item_number":"5.02","item_title":"Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.","event_type":"exec_appointment","event_domain":"governance","is_material":true,"confidence":0.92,"reasoning":"Amy Miller was elected as a director representing Wheatland Rural Electric Association on Tri-State's Board of Directors, effective September 22, 2026. This is a director appointment disclosed under Item 5.02, and board composition changes are material to investors assessing governance and oversight.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-23T21:31:56.038044+00:00","company_name":"Tri-State Generation \u0026 Transmission Association, Inc.","ticker":null,"filing_date":"2026-09-23"}]}