{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-24-199141","form_type":"8-K","ticker":"AMSC","cik":"0000880807","company_name":"AMERICAN SUPERCONDUCTOR CORP /DE/","filed_at":"2024-08-13T23:59:59+00:00","discovered_at":"2026-05-14T18:03:16.138830+00:00","generated_at":"2026-05-31T09:55:05.408095+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"medium","headline":"AMSC files prospectus supplement for secondary offering by selling stockholders","bullets":["Filed prospectus supplement on August 12, 2024 for shares to be sold by certain selling stockholders.","Registration Statement on Form S-3 (333-281496) became effective the same day.","Latham & Watkins issued opinion on validity of shares, filed as Exhibit 5.1.","Company is not selling shares; offering is secondary from existing stockholders."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-24-199141","json":"https://secwatch.observer/filing/0001193125-24-199141.json","markdown":"https://secwatch.observer/filing/0001193125-24-199141.md","text":"https://secwatch.observer/filing/0001193125-24-199141.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/880807/000119312524199141/0001193125-24-199141-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/880807/000119312524199141/d855585d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-31T09:55:05.408095+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"}