Every S-1 that Birchtech Corp. (BCHT) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A S-1 covers the registration statement a company files to sell shares publicly, 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. plans a primary offering of 4,464,286 shares of common stock, with an assumed price of $3.36 per share, and has granted underwriters a 30‑day option for 669,643 additional shares. Estimated net proceeds are about $13.1 million, or $15.2 million if the option is fully exercised.
The company provides specialty activated carbon technologies for mercury emissions control at coal‑fired power plants and is expanding into PFAS-focused water treatment. As of February 11, 2026, 19,455,966 shares were outstanding, rising to 23,920,252 after the offering. Key risks include heavy reliance on evolving U.S. environmental regulations, customer concentration, active patent challenges, going‑concern uncertainty, and dependence on collection of a $78.4 million patent judgment that is under appeal.
Birchtech Corp. is conducting a primary offering of 5,449,592 shares of common stock, based on an assumed public offering price of $3.67 per share. The company expects to raise approximately $17.7 million in net proceeds, or about $20.5 million if underwriters fully exercise a 817,439‑share over‑allotment option.
Shares outstanding are expected to increase from 19,455,966 to 24,905,558. Birchtech plans to use the cash, together with existing funds, for ongoing operating expenses, working capital, and general corporate purposes. The company has applied to list its stock on the NYSE American under the symbol “BCHT”, with NYSE American approval a condition to closing the deal; trading would cease on the OTCQB if the uplisting occurs.
Birchtech provides specialty activated carbon technologies for mercury emissions control at coal‑fired power plants and is expanding into water treatment focused on PFAS removal. It highlights regulatory uncertainty around U.S. emissions and water rules, customer concentration, patent protection challenges, and a going concern risk given a year‑end 2025 cash balance of about $2.3 million.
Birchtech Corp. is registering 4,819,278 shares of common stock in a primary offering at an assumed price of $4.15 per share, with a 30‑day option for underwriters to buy up to 722,892 additional shares. The company expects net proceeds of about $17.7 million, or $20.5 million if the option is fully exercised, to fund operating expenses, working capital and general corporate purposes.
Birchtech recently completed a 1‑for‑5 reverse stock split effective December 26, 2025 to help meet listing requirements and plans to move its shares from the OTCQB to the NYSE American under the symbol “BCHT,” which is a condition to closing this offering. Shares outstanding were 19,455,966 before the deal and would be 24,275,244 afterward, excluding the underwriters’ option.
The company provides specialty activated carbon technologies for mercury emissions control at coal‑fired power plants and is expanding into water treatment for PFAS and other contaminants. It discloses substantial doubt about its ability to continue as a going concern given a cash balance of approximately $2.3 million at December 31, 2025 and relies on expected litigation recoveries, new water‑business revenue, and this equity raise to improve liquidity.