{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-22-010177","form_type":"8-K","ticker":"BUKS","cik":"0000015847","company_name":"BUTLER NATIONAL CORP","filed_at":"2022-04-29T23:59:59+00:00","discovered_at":"2026-05-14T18:04:01.322254+00:00","generated_at":"2026-06-26T02:37:37.165323+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.15,"calibrated_materiality_score":0.15,"confidence":"high","headline":"Director Michael J. Tamburelli resigns from Butler National Board","bullets":["Michael J. Tamburelli resigned from the Board of Directors effective April 29, 2022.","Resignation is not due to any disagreement with the company's operations, policies, or practices.","No replacement announced; board size effectively reduced."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-22-010177","json":"https://secwatch.observer/filing/0001437749-22-010177.json","markdown":"https://secwatch.observer/filing/0001437749-22-010177.md","text":"https://secwatch.observer/filing/0001437749-22-010177.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/15847/000143774922010177/0001437749-22-010177-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/15847/000143774922010177/buks20220429_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-26T02:37:37.165323+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":[{"claim_id":"0d7fd9b12b","claim":"Michael J. Tamburelli resigned as Board of Directors at BUTLER NATIONAL CORP.","evidence_excerpt":"On April 28, 2022, Michael J. Tamburelli notified Butler National Corporation (“Company”) of his resignation from the Board of Directors (“Board”), effective April 29, 2022.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/15847/000143774922010177/0001437749-22-010177-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Board of Directors"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}