{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-26-030822","form_type":"8-K","ticker":"AMSC","cik":"0000880807","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","filed_at":"2026-09-21T20:07:23+00:00","discovered_at":"2026-09-21T20:08:12.056833+00:00","generated_at":"2026-09-21T20:08:17.117539+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"AMSC director Barbara G. Littlefield resigns from board effective Sept. 18, 2026","bullets":["Barbara G. Littlefield notified the AMSC Board of her resignation on Sept. 17, 2026.","Resignation takes effect at 12:00 p.m. ET on Friday, Sept. 18, 2026.","No reason for departure or successor appointment was disclosed in the filing."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-26-030822","json":"https://secwatch.observer/filing/0001437749-26-030822.json","markdown":"https://secwatch.observer/filing/0001437749-26-030822.md","text":"https://secwatch.observer/filing/0001437749-26-030822.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/880807/000143774926030822/0001437749-26-030822-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/880807/000143774926030822/amsc20260921_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-09-21T20:08:17.117539+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}