{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-21-004811","form_type":"8-K","ticker":"ASYS","cik":"0000720500","company_name":"AMTECH SYSTEMS INC","filed_at":"2021-11-19T23:59:59+00:00","discovered_at":"2026-05-14T18:04:15.361218+00:00","generated_at":"2026-06-28T06:44:28.383516+00:00","sec_items":["4.01","5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Amtech dismisses auditor MHM, appoints Grant Thornton; reinstates shareholder special meeting right","bullets":["Dismissed Mayer Hoffman McCann P.C. as auditor effective Nov 17, 2021; no disagreements in prior two fiscal years.","Appointed Grant Thornton LLP as independent auditor for FY ending Sep 30, 2022, effective Nov 19.","Board reinstated shareholder right to call special meeting; threshold lowered to 35% of voting shares."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-21-004811","json":"https://secwatch.observer/filing/0000950170-21-004811.json","markdown":"https://secwatch.observer/filing/0000950170-21-004811.md","text":"https://secwatch.observer/filing/0000950170-21-004811.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/720500/000095017021004811/0000950170-21-004811-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/720500/000095017021004811/asys-20211116.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T06:44:28.383516+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"}