secwatch.observer — SEC 8-K summary
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Issuer:     Birchtech Corp. (BCHT)
CIK:        0000728385
Form:       8-K
Filed at:   2026-05-06T23:59:59+00:00
Accession:  0001477932-26-002802
Event type: leadership
Sentiment:  neutral
Materiality: 0.60
Item codes: 5.02, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Birchtech appoints Michael Mioska as CFO; CEO & COO contracts extended with retention bonuses
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- 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.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/0001477932-26-002802-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/728385/000147793226002802/meec_8k.htm
  HTML page:      https://secwatch.observer/filing/0001477932-26-002802

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer