{"schema_version":"secwatch.filing_event.v1","accession":"0001477932-22-005733","form_type":"8-K","ticker":"BCHT","cik":"0000728385","company_name":"Birchtech Corp.","filed_at":"2022-08-08T23:59:59+00:00","discovered_at":"2026-05-14T18:03:58.032066+00:00","generated_at":"2026-06-24T03:04:58.588223+00:00","sec_items":["4.01","9.01"],"event_type":"other_material","sentiment":"negative","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Midwest Energy Emissions appoints Marcum LLP as auditor; prior reports flagged going concern","bullets":["Board approved Marcum LLP as independent auditor for FY2022 on Aug 3, 2022.","Prior auditor Rotenberg combined with Marcum effective Feb 1, 2022; formally resigned Aug 3.","Rotenberg's 2020 and 2021 reports included an explanatory paragraph on substantial doubt about going concern.","No disagreements or reportable events with Rotenberg during the past two fiscal years."],"urls":{"canonical":"https://secwatch.observer/filing/0001477932-22-005733","json":"https://secwatch.observer/filing/0001477932-22-005733.json","markdown":"https://secwatch.observer/filing/0001477932-22-005733.md","text":"https://secwatch.observer/filing/0001477932-22-005733.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/728385/000147793222005733/0001477932-22-005733-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/728385/000147793222005733/meec_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-24T03:04:58.588223+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"}