Birchtech Corp. Form 8-K Filing Summary

On March 17, 2026, Birchtech Corp. reported the partial exercise of the over-allotment option from its previously completed public offering. The company sold an additional 600,000 shares of common stock, generating approximately $1.4 million in gross proceeds. This brings the total shares issued and sold in the offering to 6,850,000, with total gross proceeds reaching approximately $16.4 million. The remaining option to purchase up to 337,500 additional shares is still unexercised. The filing also lists the exhibits, including the Cover Page Interactive Data File.