{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-330930","form_type":"8-K","ticker":"AMSC","cik":"0000880807","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","filed_at":"2025-12-23T23:59:59+00:00","discovered_at":"2026-05-14T18:02:42.449789+00:00","generated_at":"2026-05-16T12:22:30.660716+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"medium","headline":"AMSC files prospectus supplement for common stock resale by selling stockholders","bullets":["Prospectus supplement filed Dec 23, 2025 under existing S-3 shelf registration.","Shares to be sold from time to time by certain selling stockholders; no new share issuance by AMSC.","Latham & Watkins legal opinion on share validity filed as Exhibit 5.1."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-330930","json":"https://secwatch.observer/filing/0001193125-25-330930.json","markdown":"https://secwatch.observer/filing/0001193125-25-330930.md","text":"https://secwatch.observer/filing/0001193125-25-330930.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/880807/000119312525330930/0001193125-25-330930-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/880807/000119312525330930/d36453d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T12:22:30.660716+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"}