Here are the 424B prospectus supplements from Birchtech Corp. (BCHT) in our archive over the last 12 months, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 424B covers the supplement that carries the terms of a priced offering, so if you follow BCHT and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full BCHT filings page.
Birchtech Corp. is offering 6,250,000 shares of common stock in a primary offering at $2.40 per share. The offering is expected to produce proceeds to the company of $13,950,000 before expenses, with a 30-day underwriter option for an additional 937,500 shares. The company reports 19,455,966 shares outstanding prior to the offering and 25,705,966 shares outstanding immediately after the offering (assuming no exercise of the option). The prospectus gives effect to a 1-for-5 reverse stock split effective December 26, 2025 and notes expected NYSE American trading under the symbol BCHT beginning February 26, 2026. The Chief Executive Officer intends to purchase $750,000 (an aggregate of 312,500 shares) in the offering.