{"filing":{"accession_number":"0001437749-26-030822","cik":"0000880807","ticker":"AMSC","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","form":"8-K","filing_date":"2026-09-21","report_date":"2026-09-17","primary_document":"amsc20260921_8k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/880807/000143774926030822/amsc20260921_8k.htm"},"events":[{"id":33975,"run_id":31277,"accession_number":"0001437749-26-030822","anchor_item_number":"5.02","event_type":"exec_departure","event_domain":"governance","is_material":true,"confidence":0.95,"summary":"Barbara G. Littlefield resigned from the Board of Directors effective September 18, 2026. The disclosure centers on a director's departure from the company, which is a material governance event affecting the composition of the Board and the registrant's leadership structure.","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","ticker":"AMSC","filing_date":"2026-09-21","form":"8-K","submitted_at":null,"items":[{"id":37580,"accession_number":"0001437749-26-030822","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_departure","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"Barbara G. Littlefield resigned from the Board of Directors effective September 18, 2026. The disclosure centers on a director's departure from the company, which is a material governance event affecting the composition of the Board and the registrant's leadership structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T20:08:47.253204+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":37580,"accession_number":"0001437749-26-030822","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_departure","event_domain":"governance","is_material":true,"confidence":0.95,"reasoning":"Barbara G. Littlefield resigned from the Board of Directors effective September 18, 2026. The disclosure centers on a director's departure from the company, which is a material governance event affecting the composition of the Board and the registrant's leadership structure.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-09-21T20:08:47.253204+00:00","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","ticker":"AMSC","filing_date":"2026-09-21"}]}