S-1/A: Birchtech Files S-1/A for NYSE American Listing & Capital Raise

Birchtech Corp. files an S-1/A registration statement to offer 4.46 million shares of common stock, seeking a NYSE American listing, while navigating ongoing patent litigation and regulatory shifts in mercury and PFAS treatment markets.

Summary

• Birchtech Corp. is offering 4,464,286 shares of common stock at an assumed public offering price of $3.36 per share, aiming to raise approximately $13.1 million in net proceeds, or $15.2 million if the over-allotment option is fully exercised.
• The company has applied to list its common stock on the NYSE American under the symbol BCHT, which is a condition to the completion of this offering. Its shares currently trade on the TSX and OTCQB.
• A 1-for-5 reverse stock split became effective on December 26, 2025, primarily to meet the NYSE American's minimum price requirement.
• Birchtech reported a net loss of approximately $10.802 million for the year ended December 31, 2024, compared to a net income of $5.668 million (as restated) for the year ended December 31, 2023.
• For the nine months ended September 30, 2025, the company had a net loss of approximately $2.433 million, an improvement from a net loss of $9.459 million for the same period in 2024.
• Revenues for the nine months ended September 30, 2025, increased to $13.837 million from $11.840 million in the prior year period, driven by a significant increase in licensing revenues ($3.125 million in 2025 vs. $0.274 million in 2024).
• The company was awarded a $57.1 million patent infringement verdict on March 1, 2024, against CERT defendants, with a final judgment of $78,397,157.05 (including pre-judgment interest) issued on December 29, 2025. The defendants filed an appeal on January 28, 2026.
• Birchtech is expanding into water treatment technologies, specializing in PFAS and PFOS removal, and has commissioned two 'Design Centers' for innovation and GAC thermal reactivation.
• The EPA's national enforceable drinking water standards for PFAS were issued in April 2024, with monitoring by 2027 and compliance by 2029. However, the Trump Administration announced in May 2025 an intent to extend PFOA/PFOS compliance deadlines to 2031 and reconsider other PFAS regulations.
• The company's financial statements include an explanatory paragraph regarding substantial doubt about its ability to continue as a going concern, citing a net loss, cash used in operations, and a working capital deficiency of $5.027 million as of September 30, 2025.
• Previously issued financial statements for periods ended December 31, 2023, and 2022, and interim periods in 2023 and 2024 were restated due to an error in revenue recognition for a license agreement.

Sentiment

Score: 4

Explanation: StockSavvy.ai views this filing with cautious optimism. While the significant patent infringement judgment and growth in the water treatment sector are positive, the ongoing legal appeals, regulatory uncertainty, and explicit 'going concern' warning present substantial risks to the company's financial stability and future operations.

Positives

• Secured a significant patent infringement verdict of $57.1 million, leading to a final judgment of $78,397,157.05, which could provide substantial cash inflows.
• Successfully entered into new licensing agreements with utility defendants, contributing to a significant increase in licensing revenues to $3.125 million for the nine months ended September 30, 2025, up from $0.274 million in the prior year period.
• Improved operating loss to $1.717 million for the nine months ended September 30, 2025, from $7.079 million in the comparable 2024 period, driven by higher-margin licensing revenue and reduced SG&A.
• Launched a new water treatment business line with next-generation sorbent technologies targeting PFAS/PFOS, positioning the company in a growing market with dedicated 'Design Centers' for innovation and GAC thermal reactivation.
• Demonstrations of the Carbon Rejuvenation™ process showed thermally reactivated GAC performed comparably to virgin activated carbon in removing PFAS, supporting its technical and commercial viability.
• Management is actively pursuing additional financing opportunities to mitigate going concern risks.
• The company maintains a portfolio of 18 granted patents worldwide for mercury removal, with expiration dates ranging up to September 2034, and has filed new patent applications for water treatment technologies.

Negatives

• Reported a net loss of $10.802 million for the year ended December 31, 2024, a significant decline from net income in the prior year, primarily due to the absence of legal claim income.
• Product revenue decreased to $10.637 million for the nine months ended September 30, 2025, from $11.479 million in the prior year period, attributed to the mix of plants running and unexpected customer forced outages.
• The company faces substantial doubt about its ability to continue as a going concern, with a cash balance of $2.3 million at December 31, 2025, and a working capital deficiency of $5.027 million at September 30, 2025.
• The $78.4 million patent infringement judgment is under appeal, creating uncertainty regarding the timing and amount of any recovery.
• Certain patents related to mercury removal are subject to Inter Partes Review (IPR) proceedings, which could lead to invalidation or narrowing of claims, impacting enforceability.
• The regulatory environment for both mercury emissions and PFAS treatment is subject to political changes and potential rollbacks or delays, as evidenced by the Trump Administration's actions on MATS and PFAS compliance deadlines.
• The company's internal control over financial reporting and disclosure controls were deemed not effective as of December 31, 2024, and September 30, 2025, requiring ongoing remediation efforts.
• A significant portion of revenue and accounts receivable are concentrated among a few key customers, increasing dependency risk.
• The company's business lacks significant diversification, historically relying on mercury emission control technologies, making it vulnerable to industry-specific factors.
• Low natural gas prices and mild weather can negatively impact demand for coal, thereby affecting the company's mercury emissions control business.

Risks

• Demand for mercury emissions services and products is largely driven by coal consumption, and any significant changes diminishing coal use may adversely affect the business.
• Technological change may render products and services less marketable if the company cannot continually improve or introduce new products in a timely manner.
• The industry is highly competitive, and the company may struggle against competitors with greater resources.
• Inability to successfully protect intellectual property rights or unfavorable outcomes in patent litigation could invalidate patents or prevent new ones from issuing.
• Ongoing inter partes review proceedings could adversely affect the enforceability of patent rights, potentially impairing the ability to enforce judgments or collect damages.
• Dependence on third-party suppliers for raw materials means availability and price volatility could impact results of operations.
• Reliance on key customers means a significant adverse change in these relationships could negatively impact financial results.
• Loss of key employees could disrupt operations and future growth due to the company's limited number of personnel.
• Lack of diversification increases investment risk, as the business is acutely impacted by factors affecting its primary industry.
• Low gas prices and mild weather can negatively impact demand for coal, affecting the company's mercury emissions control business.
• Insurance coverage may be inadequate to protect against all business risks, potentially leading to substantial uninsured losses.
• Disputes with customers over contract provisions (pricing, quality, quantity) could result in substantial costs, liabilities, and loss of revenues.
• Business interruptions from geopolitical events, natural disasters, infrastructure failures, or pandemics could disrupt operations and supply chains.
• Disruptions to information technology systems or network security breaches could interrupt operations, compromise reputation, and incur costly response measures.
• Maintaining and improving financial controls may divert management's attention and increase costs, and continued ineffectiveness could erode investor confidence.
• Liquidity risk could impair the ability to fund operations and jeopardize financial condition.
• Management has broad discretion in the use of offering proceeds, and ineffective application could harm the business.
• Future sales of common stock or the perception of such sales could adversely affect the market price and impair future capital raising ability.
• The company does not anticipate paying cash dividends in the foreseeable future, making capital appreciation the sole source of gain for investors.
• The common stock is currently characterized as a 'penny stock' under SEC rules, which may make it more difficult to resell and limit market liquidity.
• Failure to list on NYSE American or maintain listing standards could negatively impact stock price and ability to sell shares.
• The 1-for-5 reverse stock split may not sustain the market price required for NYSE American listing and could decrease liquidity.
• Techniques employed by short sellers may drive down the market price of common stock, requiring significant resources to defend against allegations.
• Securities litigation is expensive and could divert management's attention.
• An investment in common stock is speculative and involves a high degree of risk, with no assurance of positive return.
• Investment in common stock may result in uncertain or adverse U.S. federal income tax consequences.

Future Outlook

Birchtech Corp. anticipates receiving additional cash inflows from the $78.4 million patent infringement judgment, further licensing revenues, and product sales from ongoing patent litigation. The company expects vibrant new revenue streams from its entry into the water treatment business, supported by new state-of-the-art laboratories and personnel. Management is also exploring additional financing opportunities to address its going concern issues. However, there is no assurance that these plans will be successfully realized or implemented, and the timing of any recovery from the judgment is uncertain due to the appeal.

Management Comments

• "We believe that a significant percentage of coal-fired power plants in the United States have adopted and are infringing upon our two-part SEA process for mercury removal from coal-fired power plants."
• "Our goal and overall strategy is to convert infringers to our supply chain of sorbent products for mercury removal, or otherwise license our patents to them on a non-exclusive basis."
• "We believe our complete science and engineering approach for mercury-sorbent-flue gas interactions are well-understood, highly predictive, and critical to delivering total mercury control."
• "In light of evolving water regulations and funding dynamics, we believe the Company is well positioned to capture a meaningful share in the rapidly growing water treatment sector."
• "We believe our technology platform is not solely dependent on PFAS regulations, as market demand for improved water treatment solutions is broad."
• "We believe that we have the most effective technology for the EGUs and that we maintain a strong patent position for our mercury emissions technologies in Canada."
• "We believe this regional reactivation model represents a differentiated solution that integrates environmental benefits directly into operating economics and supports broader commercialization opportunities."
• "While management believes these plans will alleviate substantial doubt, there is no assurance that they will be successfully realized or implemented."

Industry Context

StockSavvy.ai notes that Birchtech Corp. operates in two highly regulated and evolving environmental technology sectors: mercury emissions control for coal-fired power plants and water purification, particularly for PFAS. The mercury market is shrinking due to the phasing out of coal-fired plants, but regulations like MATS still drive demand for compliance solutions. The water treatment market, especially for PFAS, is rapidly expanding due to new EPA regulations and significant government funding (Infrastructure Investment and Jobs Act allocating $9 billion for PFAS and $12 billion for general drinking water improvements). The political shifts in EPA policy, such as the Trump Administration's reconsideration of MATS and extension of PFAS compliance deadlines, introduce regulatory uncertainty that could impact market demand and the company's growth strategy. Competitors like Arq, Inc., Norit Activated Carbon, Calgon Carbon Corporation, and Nalco Company LLC are well-established, indicating a competitive landscape where Birchtech's patented technologies and cost-effectiveness are key differentiators.

Comparison to Industry Standards

• Birchtech's SEA technology has consistently performed better in mercury removal at lower projected costs compared to competitor products in head-to-head tests, such as those offered by Arq, Inc. (formerly Advanced Emissions Solutions, Inc.), Norit Activated Carbon, Calgon Carbon Corporation, and Nalco Company LLC.
• The company's Design Centers for water treatment are believed to be the only known facilities in North America with integrated capability to thermally reactivate spent GAC under controlled conditions and conduct rapid small-scale column tests (RSSCTs) to compare performance against virgin carbon, offering a unique competitive advantage in sustainable water treatment solutions.
• Demonstrations of Birchtech's carbon rejuvenation process with regulated municipal water utilities showed thermally reactivated GAC performed comparably to virgin activated carbon in removing PFAS, meeting expected treatment standards, which is a strong indicator of competitive performance against new carbon alternatives.

Management Changes

Corporate Governance

Legal Proceedings

• A federal jury awarded Birchtech Corp. a $57.1 million patent infringement verdict against CERT defendants on March 1, 2024, in the U.S. District Court for the District of Delaware, finding willful, induced, and contributory infringement.
• The Court issued a final judgment of $78,397,157.05, including pre-judgment interest, in favor of Birchtech Corp. on December 29, 2025, after denying CERT defendants' post-trial motions.
• The CERT defendants filed a notice of appeal of the judgment on January 28, 2026; no bonded stay has been obtained, and interest continues to accrue.
• Birchtech Corp. commenced additional patent infringement lawsuits in July 2024 and January 2025 against multiple utilities and related entities in Arizona, Iowa, and Missouri, alleging willful infringement of mercury emissions control patents.
• Several settlement agreements have been reached in these new lawsuits, providing non-exclusive licenses and one-time fees to Birchtech Corp., with some defendants agreeing to withdraw from Inter Partes Review (IPR) petitions.
• The consolidated Iowa actions have been stayed pending the completion of IPR proceedings before the U.S. Patent and Trademark Office (PTO).
• The U.S. Patent Trial and Appeal Board (PTAB) granted institution of review for some of Birchtech Corp.'s asserted patents in September and October 2025, but the PTO Director ordered reconsideration of most of these decisions on November 25, 2025.
• The PTO Director denied institution of IPR proceedings for certain other defendants in November 2025, though those defendants have requested reconsideration.

Related Party Transactions

• AC Midwest Energy, LLC: Entered into an Unsecured Debt Restructuring Agreement on February 27, 2024, which replaced prior agreements. The company repaid $9.04 million and issued a new unsecured note for $4.11 million. The remaining principal of $3.15 million on the new note was repaid on August 26 and 27, 2024. The only remaining obligation is a non-recourse profit participation preference of $7.9 million, payable from Net Litigation Proceeds. AC Midwest beneficially owns approximately 9.6% of the outstanding common stock.
• Kaye Cooper Kay & Rosenberg, LLP: The law firm provides legal services to the company. David M. Kaye, a director, is a partner. The company paid $450,760 in 2025, $431,444 in 2024, and $393,111 in 2023 for legal services and disbursements. As of September 30, 2025, $37,500 was owed to the firm.
• Dakin Holdings Ltd.: Entered into a License and Supply Agreement on January 31, 2023, with Dakin, a company owned and controlled by Richard MacPherson (CEO and President). The agreement grants Birchtech a limited license to manufacture Dakin IP products and an exclusive license to commercialize Dakin IP in the U.S. Monthly license fees of $12,500 were eliminated after September 30, 2024. Dakin incurred $112,500 in license fees in 2024 and $150,000 in 2023.
• Greenberg Enterprises, LLC: Entered into an Administrative Services Agreement on May 28, 2024, with Greenberg Enterprises, owned and controlled by Christopher Greenberg (former Chairman of the Board). The agreement was terminated in December 2024. In 2024, Greenberg Enterprises received $237,020 for administrative services and $335,100 for expense reimbursement.

Stakeholder Impact

• Shareholders: Will experience immediate and substantial dilution of $2.94 per share from the offering. The appeal of the $78.4 million judgment introduces uncertainty regarding potential future returns. The 'going concern' warning highlights significant financial risk.
• Employees: The company has a limited number of key employees, and the loss of more than one could disrupt operations and future growth. New personnel have been added to support the water treatment business.
• Customers (Mercury Emissions): Regulatory changes, such as the MATS rule rollbacks and exemptions, could reduce demand for mercury emissions control technologies, impacting existing contracts and future business.
• Customers (Water Treatment): New EPA regulations for PFAS create a growing market opportunity, but regulatory delays could slow adoption. The company's carbon rejuvenation process aims to lower compliance costs and improve operational efficiency for municipal and industrial utilities.
• Suppliers: Dependence on a few key suppliers for raw materials means availability and price volatility could impact the company's operations and costs.
• Creditors: The 'going concern' warning and working capital deficiency indicate increased risk for creditors, although the recent repayment of secured and unsecured notes to AC Midwest has reduced some debt obligations.

Next Steps

• Complete the public offering and list common stock on the NYSE American.
• Continue to actively defend intellectual property rights in ongoing patent litigation and IPR proceedings.
• Acquire property and construct a commercial thermal reactivation facility for GAC in 2026.
• Implement additional control procedures to improve the overall internal control environment throughout 2026 and beyond.
• Monitor and adapt to evolving environmental regulations related to mercury emissions and PFAS in drinking water.
• Management will continue exploring additional financing opportunities to address liquidity and going concern issues.
• The Board of Directors intends to adopt a clawback policy compliant with NYSE American rules.

Key Dates

Recommendation

Birchtech Corp. presents a mixed investment profile. The significant patent infringement judgment and the strategic pivot into the growing PFAS water treatment market offer substantial upside potential. However, the 'going concern' warning, the appeal of the legal judgment, and the volatile regulatory environment for both its mercury and water treatment businesses introduce considerable uncertainty and risk. While the capital raise will provide some liquidity, the immediate dilution for new investors and the company's historical financial performance warrant a cautious approach. A 'hold' recommendation is appropriate as investors should monitor the outcome of the appeal, the progress in the water treatment segment, and the company's ability to achieve sustainable profitability and resolve its going concern issues before considering further investment.

Keywords

Activated Carbon, Mercury Emissions Control, Water Treatment, PFAS Removal, Environmental Technology, Air Purification, Coal-Fired Power Plants, Patent Litigation, SEC Filing, NYSE American Listing, Reverse Stock Split, Going Concern, Environmental Regulations, Carbon Rejuvenation