{"schema_version":"secwatch.filing_event.v1","accession":"0001477932-26-002802","form_type":"8-K","ticker":"BCHT","cik":"0000728385","company_name":"Birchtech Corp.","filed_at":"2026-05-06T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.684933+00:00","generated_at":"2026-05-14T23:01:25.753043+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Birchtech appoints Michael Mioska as CFO; CEO & COO contracts extended with retention bonuses","bullets":["CFO Fiona Fitzmaurice departed May 1, 2026; Michael Mioska appointed CFO effective same day.","CEO Richard MacPherson's employment extended to May 31, 2030; receives $500k cash retention bonus.","James Trettel promoted to COO from EVP of Operations; employment extended to 2030 with $250k bonus.","Mioska is a CPA with 20+ years experience; has consulted for Birchtech since 2023.","CEO & COO base salaries unchanged at $1M and $600k, respectively; no disagreements cited."],"urls":{"canonical":"https://secwatch.observer/filing/0001477932-26-002802","json":"https://secwatch.observer/filing/0001477932-26-002802.json","markdown":"https://secwatch.observer/filing/0001477932-26-002802.md","text":"https://secwatch.observer/filing/0001477932-26-002802.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/meec_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-14T23:01:25.753043+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":"13ce9547ba","claim":"Fiona Fitzmaurice departed as Chief Financial Officer at Birchtech Corp..","evidence_excerpt":"On May 1, 2026, Fiona Fitzmaurice ceased serving as Chief Financial Officer of Birchtech Corp.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"ceased serving"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"},{"claim_id":"4730ea27bc","claim":"James Trettel changed role as Executive Vice President of Operations at Birchtech Corp..","evidence_excerpt":"in connection with his appointment, he ceased serving as Executive Vice President of Operations.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm","confidence":0.9,"family_label":"Executive change","details":[{"label":"Action","value":"ceased serving"},{"label":"Role","value":"Executive Vice President of Operations"}],"fact_type":"executive_change"},{"claim_id":"5708901679","claim":"James Trettel was appointed as Chief Operating Officer at Birchtech Corp..","evidence_excerpt":"on May 1, 2026, the Company appointed James Trettel as its Chief Operating Officer, and in connection with his appointment, he ceased serving as Executive Vice President of Operations.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"},{"claim_id":"97cb7bba34","claim":"Michael Mioska was appointed as Chief Financial Officer at Birchtech Corp..","evidence_excerpt":"Effective May 1, 2026, the Company appointed Michael Mioska as its Chief Financial Officer.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}