{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-029450","form_type":"8-K","ticker":"BCHT","cik":"0000728385","company_name":"Birchtech Corp.","filed_at":"2026-03-17T23:59:59+00:00","discovered_at":"2026-05-14T18:02:37.598233+00:00","generated_at":"2026-05-15T11:12:17.523020+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Birchtech raises additional $1.4M via partial exercise of over-allotment option","bullets":["On Mar 17, 2026, sold 600,000 shares at $2.40 to Lake Street Capital Markets.","Total offering now 6.85M shares with gross proceeds of approximately $16.4M.","Over-allotment option still allows up to 337,500 additional shares unexercised.","Previously reported February 27, 2026 public offering of 6.25M shares at $2.40."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-029450","json":"https://secwatch.observer/filing/0001104659-26-029450.json","markdown":"https://secwatch.observer/filing/0001104659-26-029450.md","text":"https://secwatch.observer/filing/0001104659-26-029450.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/728385/000110465926029450/0001104659-26-029450-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/728385/000110465926029450/tm268923d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T11:12:17.523020+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"}