S-1: Birchtech Corp. Files S-1 for NYSE American Listing

Birchtech Corp. is offering 4,819,278 shares of common stock at an assumed price of $4.15 per share to fund operations and support its strategic pivot into water treatment, while facing a going concern doubt and ongoing patent litigation.

Summary

• Birchtech Corp. is offering 4,819,278 shares of common stock at an assumed public offering price of $4.15 per share, aiming to raise approximately $17.7 million in net proceeds, or $20.5 million if the over-allotment option is fully exercised.
• The company intends to list its common stock on the NYSE American under the symbol BCHT, a condition for completing this offering, and has recently effected a 1-for-5 reverse stock split to meet minimum price requirements.
• Birchtech specializes in mercury emissions capture for coal-fired power plants using its patented two-part Sorbent Enhancement Additive (SEA) process and is expanding into water purification technologies, particularly for PFAS and PFOS.
• The company reported a net loss of approximately $2.4 million for the nine months ended September 30, 2025, an improvement from a $9.5 million net loss for the same period in 2024.
• Revenues for the nine months ended September 30, 2025, increased to $13.8 million from $11.8 million in the prior year period, primarily driven by higher licensing revenues.
• A federal jury awarded Birchtech a $57.1 million patent infringement verdict in March 2024, with a final judgment of $78.4 million (including pre-judgment interest) issued on December 29, 2025, though collectability remains uncertain.
• The company faces substantial doubt about its ability to continue as a going concern within one year from the issuance date of its September 30, 2025 financial statements, with cash at $1.8 million and a working capital deficiency of $5.0 million.
• New EPA regulations for PFAS in drinking water, issued in April 2024, are a key driver for the company's water treatment business, though the new Trump Administration announced intent to reconsider some of these regulations and extend compliance deadlines.
• Birchtech has invested in two state-of-the-art Design Centers in Pennsylvania and North Dakota for water treatment innovation, including thermal reactivation of granular activated carbon (GAC) and contaminant analysis.
• The company's patent portfolio for mercury removal included 18 granted patents worldwide as of December 31, 2025, but 12 U.S. and 2 foreign patents expired between August and October 2025.
• Richard MacPherson, President and CEO, beneficially owns approximately 14.51% of outstanding common stock before the offering, which will dilute to 11.65% after the offering.

Sentiment

Score: 6

Explanation: While the company faces significant financial challenges, including a going concern doubt and working capital deficiency, the substantial patent infringement judgment, improved net loss, and strategic pivot into the growing water treatment market provide strong positive momentum. The capital raise is crucial for addressing liquidity and funding growth, but regulatory uncertainties in both mercury emissions and water treatment markets temper the overall sentiment.

Positives

• Net loss improved significantly to $2.4 million for the nine months ended September 30, 2025, compared to $9.5 million for the same period in 2024.
• Total revenues increased to $13.8 million for the nine months ended September 30, 2025, from $11.8 million in the prior year period, driven by higher-margin licensing revenues.
• Licensing revenues saw a substantial increase to $3.1 million for the nine months ended September 30, 2025, from $274,000 in the prior year period, due to new agreements with utility defendants.
• A federal jury awarded a $57.1 million patent infringement verdict in March 2024, with a final judgment of $78.4 million (including pre-judgment interest) issued on December 29, 2025.
• The company has successfully resolved patent litigation with several defendants, leading to licensing agreements and withdrawals from Inter Partes Review (IPR) petitions.
• Birchtech has successfully introduced a new water treatment business line, investing in two state-of-the-art Design Centers for PFAS and PFOS treatment innovation.
• The company's SEA technology for mercury emissions capture has consistently performed better than competitors in head-to-head tests, offering lower costs and operational impact.
• The company has a strong patent position for mercury emissions technologies in Canada and continues to pursue new patents and technological advancements.
• Management is exploring additional financing opportunities to mitigate the going concern doubt.
• The company authorized a share repurchase program of up to $5.0 million in March 2025, indicating confidence in its valuation.

Negatives

• The company has a net loss of approximately $2.4 million for the nine months ended September 30, 2025, and $10.8 million for the year ended December 31, 2024.
• Cash used in operating activities was approximately $1.7 million for the nine months ended September 30, 2025, and $4.1 million for the year ended December 31, 2024.
• A working capital deficiency of approximately $5.0 million at September 30, 2025, and $2.7 million at December 31, 2024, indicates short-term liquidity challenges.
• The company's cash and financial resources may be insufficient to meet anticipated needs for the next twelve months, raising substantial doubt about its ability to continue as a going concern.
• Product revenue decreased to $10.6 million for the nine months ended September 30, 2025, from $11.5 million in the prior year period, due to plant mix, unexpected customer outages, and product mix.
• Between August and October 2025, 12 U.S. Patents and 2 foreign patents relating to mercury removal expired, potentially reducing market protection.
• The ultimate success and collectability of the $78.4 million patent infringement judgment remain uncertain due to potential appeals and collectability issues.
• Inter Partes Review (IPR) proceedings are ongoing for certain mercury removal patents, which could lead to narrowing or invalidation of claims.
• The outcome of the 2024 U.S. presidential election has introduced significant uncertainty regarding future environmental regulations, particularly MATS and PFAS rules, which could impact demand for services.
• The company's business lacks significant diversification, historically dependent on mercury emission control technologies, making it acutely impacted by industry factors.
• Management concluded internal control over financial reporting and disclosure controls were not effective as of December 31, 2024, and September 30, 2025, requiring ongoing remediation efforts.
• Investors in this offering will experience immediate and substantial dilution of $3.54 per share in net tangible book value.

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 modify them in a timely manner.
• The industry is highly competitive, and inability to compete effectively with larger, better-resourced competitors could adversely affect financial results.
• Inability to successfully protect intellectual property rights, including potential invalidation or narrow interpretation of patents in litigation or IPR proceedings, poses a significant risk.
• Dependence on third-party suppliers for raw materials means availability and price volatility could impact results of operations.
• Reliance on a small number of key customers means a significant adverse change in these relationships could negatively impact financial condition.
• Loss of key employees could disrupt operations and future growth.
• Lack of diversification increases the risk profile, as the business is heavily dependent on mercury emission control technologies.
• Low natural gas prices or mild weather could negatively impact demand for coal-fired power and thus demand for the company's products.
• Insurance coverage may not be adequate to protect against all business risks, leading to substantial costs from uninsured losses.
• Revenues are generated under contracts or blanket purchase orders that must be periodically renegotiated, with no assurance of competitive pricing or successful renegotiation.
• Business interruptions from geopolitical events, natural disasters, or infrastructure failures could significantly disrupt operations.
• 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 available funds, and ineffective application could harm the business.
• Restatements of previously issued financial statements could cause uncertain sentiment in the investment community.
• Any significant changes, rollbacks, or delays in environmental regulations related to mercury emissions and potable water treatment could have a major impact.
• The MATS Rule has been subject to legal challenges and modifications, creating regulatory uncertainty.
• Uncertainty and variability in international environmental regulations could restrict expansion outside the United States.
• Trading activity for common stock has varied and, at times, been limited, potentially making it difficult for investors to buy and sell shares.
• Stock price may be volatile, leading to substantial losses and potential litigation.
• Need for additional capital in the future may not be available on acceptable terms or at all, potentially diluting existing stockholders.
• If the common stock fails to list on the NYSE American and remains a penny stock, it may be more difficult to resell.
• Even after a 1-for-5 reverse stock split, there is no assurance the market price will remain high enough to comply with NYSE American minimum price requirements.
• Sales of substantial amounts of shares or the perception of such sales could adversely affect the share price.
• No anticipation of paying cash dividends in the foreseeable future, making capital appreciation the sole source of gain.
• Officers and directors are entitled to indemnification, which could be costly and discourage stockholder rights exercise.
• Techniques employed by short sellers may drive down the market price of common stock.
• Securities litigation is expensive and could divert management's attention.
• An investment in common stock 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 continued growth in its mercury capture solutions in North America by building customer trust and pursuing patent infringers for licensing and supply agreements. The company expects its new water treatment business, driven by next-generation sorbent technologies and state-of-the-art Design Centers, to capture a meaningful share in the rapidly growing potable and industrial wastewater markets, despite evolving and uncertain PFAS regulations. Future plans include opening and operating commercial thermal reactivation plants based on data from the Design Centers. The company is exploring additional financing opportunities to address its going concern doubt.

Management Comments

• "Our leading-edge services have been shown to achieve mercury emissions removal at a significantly lower cost and with less operational impact to coal-fired power plants than other used methods, while maintaining and/or increasing power plant output and preserving the marketability of byproducts for beneficial use."
• "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 in connection with their respective coal-fired power plants."
• "These new solutions are being designed to use significantly less activated carbon, offering a more environmentally sustainable approach to water treatment while maintaining or improving contaminant removal performance."
• "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."
• "We believe our technology platform is not solely dependent on PFAS regulations, as market demand for improved water treatment solutions is broad."
• "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 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 that by offering proven and innovative service offerings, we can attract more customers and partners to our services, creating a network growth effect. We expect that the continuing pursuit of infringers of our patented technologies will yield further licensing and supply agreements."
• "While management believes these plans will alleviate substantial doubt, there is no assurance that they will be successfully realized or implemented."

Industry Context

The company operates in the environmental technology sector, specifically addressing air and water purification. Its mercury emissions control business is directly impacted by federal regulations like MATS, which have seen recent rollbacks and uncertainties under the new U.S. administration, potentially reducing demand. The pivot to water treatment is timely, aligning with the EPA's first-ever national drinking water standards for PFAS, creating a significant new market opportunity. However, this market also faces regulatory uncertainty with the new administration's intent to reconsider some PFAS regulations and extend compliance deadlines. The company's focus on next-generation sorbent technologies and thermal reactivation positions it to address growing concerns about 'forever chemicals' and offer more sustainable solutions, potentially differentiating it from traditional activated carbon providers like Norit and Calgon Carbon.

Comparison to Industry Standards

• Birchtech's SEA technology for mercury capture has consistently performed better in head-to-head tests with competitor products (e.g., Arq, Inc., Norit Activated Carbon, Calgon Carbon Corporation, Nalco Company LLC) in mercury removal, at lower projected costs.
• The company's Design Centers are believed to be the only known facilities in North America with integrated capability to thermally reactivate spent GAC under controlled conditions and conduct RSSCTs to compare performance against virgin carbon, offering a unique sustainable and cost-effective alternative.
• The company's water treatment solutions are designed to use significantly less activated carbon compared to existing methods, offering a more environmentally sustainable approach while maintaining or improving contaminant removal performance, which could be a competitive advantage against traditional GAC providers.

Management Changes

Corporate Governance

Legal Proceedings

• A federal jury in the U.S. District Court for the District of Delaware awarded a $57.1 million patent infringement verdict in favor of the Company against CERT defendants on March 1, 2024, for willful, induced, and contributory infringement of mercury emissions technologies.
• The Court issued a final judgment in this Delaware action on December 29, 2025, in the total amount of $78,397,157.05, including pre-judgment interest, following denial of CERT defendants' post-trial motions.
• The CERT defendants may seek appellate review, and the collectability and timing of recovery on the judgment remain uncertain.
• In July 2024, the Company commenced three additional patent infringement lawsuits in U.S. District Courts in Arizona, Iowa, and Missouri against multiple utilities and related entities for alleged willful infringement of mercury emissions control patents.
• These three lawsuits, along with an additional suit initiated in January 2025 against Evergy-affiliated entities, were consolidated and centralized in the U.S. District Court for the Southern District of Iowa for coordinated pretrial proceedings.
• Between January and July 2025, certain defendants in the consolidated Iowa actions filed Inter Partes Review (IPR) petitions with the U.S. Patent and Trademark Office (PTO) seeking to invalidate various asserted claims.
• In September and October 2025, the U.S. Patent Trial and Appeal Board (PTAB) granted institution of review for certain of the Company's asserted patents, leading to a stay of the Iowa litigation on October 13, 2025, pending IPR completion.
• On November 25, 2025, the PTO Director ordered the PTAB to reconsider most of its institution decisions from September and October 2025.
• In November 2025, the PTO Director denied institution of IPR proceedings filed by certain other defendants in the consolidated Iowa actions, though these defendants have requested reconsideration.
• The Company has entered into several agreements with utility defendants in the Arizona and Iowa actions, providing non-exclusive licenses to its SEA process patents in exchange for one-time license fees and, in some cases, rights to be included in bidding processes for product supply; these utilities have also agreed to withdraw from IPR petitions.
• A confidential agreement was reached on October 15, 2025, with another utility defendant in the Southern District of Iowa action, resolving disputes and leading to their withdrawal from related proceedings.

Related Party Transactions

• On February 27, 2024, the Company entered into an Unsecured Debt Restructuring Agreement with AC Midwest Energy, LLC (wholly-owned by a stockholder), which replaced prior agreements. This involved a $9.04 million payment, issuance of a new unsecured note for $4.11 million, and repayment of a secured note for $275,625.
• The new unsecured note was fully repaid by August 27, 2024, including $3,154,931 in principal and $119,964 in accrued interest.
• AC Midwest is entitled to a non-recourse Restructured Profit Share of $7,900,000, payable only from Net Litigation Proceeds from intellectual property claims, at a rate of 75.0% of such proceeds.
• Kaye Cooper Kay & Rosenberg, LLP, a law firm where director David M. Kaye is a partner, was paid $450,760, $431,444, and $393,111 for legal services in 2025, 2024, and 2023, respectively. $37,500 was owed to the firm at September 30, 2025, and December 31, 2024.
• On January 31, 2023, the Company entered into a License and Supply Agreement with Dakin Holdings Ltd. (owned and controlled by CEO Richard MacPherson), granting the Company a limited license to manufacture Dakin Products and an exclusive license to commercialize Dakin IP in the U.S. The Company was required to pay a license fee of $12,500 per month for three years, but an amendment on November 18, 2024, eliminated fees after September 30, 2024. Dakin incurred $0, $112,500, and $150,000 in license fees for the nine months ended September 30, 2025, and the years ended December 31, 2024 and 2023, respectively.
• On May 28, 2024, the Company entered into an Administrative Services Agreement with Greenberg Enterprises, LLC (owned and controlled by former Chairman Christopher Greenberg), which was terminated in December 2024. Greenberg Enterprises provided $237,020 for administrative services and $335,100 for expense reimbursement in 2024.

Stakeholder Impact

• Shareholders: Will experience immediate and substantial dilution in net tangible book value from the offering. The stock price may be volatile due to market factors, regulatory changes, and litigation outcomes. The going concern doubt poses a significant risk to investment value. The share repurchase program could provide some support to share price.
• Employees: The company's growth strategy in water treatment and efforts to mitigate financial challenges could provide job security and new opportunities. However, the going concern doubt creates uncertainty.
• Customers (Mercury Emissions): Regulatory changes (e.g., MATS rollbacks) create uncertainty regarding compliance requirements and demand for the company's products. Successful patent enforcement could lead to more stable supply relationships.
• Customers (Water Treatment): New PFAS regulations create a significant market opportunity for the company's innovative solutions, potentially lowering compliance costs and improving operational efficiency for municipal and industrial utilities. However, regulatory delays could impact adoption.
• Suppliers: The company relies on third-party suppliers for raw materials, and any disruptions or price volatility could impact operations and costs.
• Creditors: The going concern doubt and working capital deficiency indicate potential risks to creditors, although the patent judgment offers a significant potential recovery source.

Next Steps

• Complete the public offering of 4,819,278 shares of common stock.
• Apply for and secure listing of common stock on the NYSE American under the symbol BCHT.
• Continue to enforce patent rights and pursue licensing and supply agreements with infringers.
• Further develop and commercialize water purification technologies, particularly for PFAS and PFOS.
• Define permitting requirements, capital expenditure parameters, and projected operating costs for planned commercial thermal reactivation plants.
• Implement additional control procedures to improve the overall internal control environment throughout 2026 and beyond.
• Actively defend intellectual property rights in ongoing Inter Partes Review (IPR) proceedings.
• Monitor and adapt to evolving environmental regulations related to mercury emissions and potable water treatment, especially under the new U.S. administration.
• Explore and secure additional financing opportunities to alleviate substantial doubt about continuing as a going concern.
• Potentially initiate purchases under the $5.0 million share repurchase program in the second half of 2025.

Key Dates

Recommendation

Birchtech Corp. presents a mixed investment profile. The significant patent infringement judgment of $78.4 million and the strategic expansion into the high-growth PFAS water treatment market are strong positives, indicating potential for future revenue and improved financial health. The company's proprietary technology in both mercury emissions and water purification offers a competitive edge. However, the substantial doubt about its ability to continue as a going concern, coupled with a working capital deficiency and ongoing regulatory uncertainties in both its core and new markets, introduces considerable risk. The immediate dilution from the offering and the volatility of its stock price further complicate the investment thesis. While the long-term potential from water treatment is appealing, the near-term financial and regulatory headwinds suggest a 'hold' recommendation, advising investors to monitor the successful collection of the judgment, progress in water treatment commercialization, and resolution of the going concern issue before making further commitments.

Keywords

Activated Carbon, Mercury Emissions Control, Water Treatment, PFAS, PFOS, Environmental Regulations, SEC Filing, S-1 Registration, NYSE American Listing, Patent Litigation, Sorbent Technology, Coal-fired Power Plants, Drinking Water Standards, Reverse Stock Split, Going Concern, Financial Reporting, Intellectual Property, Clean Technology, Industrial Wastewater