ClearSign Completes Testing of 100% Hydrogen Capable Burner
ClearSign Technologies announces that, in conjunction with the U.S. Department of Energy's National Energy Technology Laboratory, under its Small Business Innovation Research program, it has completed the testing of its ClearSign Core Flexible Fuel, 100% Hydrogen Capable process burner branded as ClearSign Core 2. "We are very pleased to publicly report the success of this flexible fuel burner development project," said Jim Deller, CEO. "We are thankful for the SBIR program funding that allowed us to develop and demonstrate a technology designed to meet the real-world needs of U.S. refineries and chemical processing facilities. This technology enables compliant and cost-effective use of fuels ranging from 100% hydrogen, the full gamut of petrochemical and refinery hydrocarbon fuel gas blends, and natural gas in industrial heating operations. We believe that these ultra-low NOx results and ease of use are unmatched by any other burner that we know of in the market." ClearSign's "Flexible Fuel Ultra-Low NOx Process Burner" project, which is nearing its scheduled completion and marking a significant 2.5-year effort, resolves this issue by facilitating fuel flexibility without compromising emissions compliance with the simple replacement of burner technology. This innovative technology allows industrial facilities to enhance operational flexibility, reduce costs associated with fuel procurement and regulatory emissions compliance, and reduce disruptions to operations - all of which may provide Americans with more affordable energy. The ClearSign Core burner, scaled to 8 million British thermal units per hour, has demonstrated consistent performance across a range of fuel compositions, including 100% hydrogen, natural gas and various intermediate blends. This technology has also achieved NOx emissions that are consistently below 5 parts per million across this entire range of fuel gas blends. This is accomplished through integrated features such as internally induced flue gas recirculation, fuel-lean premixing and a patented distal flameholder, all contained within a compact burner head designed for easy retrofitting into existing heater infrastructure.
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- Significant Revenue Growth: ClearSign Technologies reported approximately $5.2 million in revenue for 2025, a 44% year-over-year increase primarily driven by the successful delivery of a 26-burner order, highlighting the company's strong performance in the petrochemical sector and enhancing its market competitiveness.
- Declining Gross Margin: Despite revenue growth, the company's gross profit margin decreased from 31% in 2024 to 27% in 2025, primarily due to increased warranty accruals, which may impact future profitability and investor confidence.
- Increased Net Loss: The company reported a net loss of approximately $197,000, driven by non-recurring legal fees of $746,000, indicating financial pressures faced during expansion that could affect cash flow management.
- Cash Flow Challenges: Net cash used in operations rose to approximately $4.7 million in 2025 from $4.4 million in 2024, indicating that the company needs to maintain a focus on cash flow sustainability to support future growth plans.
- Earnings Report: Clearsign Technologies reported a FY GAAP EPS of -$0.99, indicating ongoing challenges in profitability and reflecting pressure in market competition.
- Revenue Growth: Despite a 44.4% year-over-year revenue increase to $5.2 million, the company missed expectations by $4.53 million, highlighting a gap between market demand and sales performance.
- Cash Position: As of December 31, 2025, the company had approximately $9.2 million in cash and cash equivalents, suggesting relative stability in cash management, though ongoing operational viability remains a concern.
- Market Outlook: Given the current economic environment, the challenges faced by Clearsign Technologies may impact its future investment appeal, particularly as revenue fails to meet expectations, prompting investors to cautiously assess its long-term growth potential.
- Reverse Stock Split Announcement: ClearSign Technologies has announced a 1-for-10 reverse stock split effective March 16, 2026, which will reduce outstanding shares from approximately 54.1 million to about 5.41 million, aiming to raise the stock price to comply with Nasdaq's $1 minimum bid price requirement.
- Market Reaction: Following the announcement, ClearSign's shares fell by 14.9% in after-hours trading, indicating negative market sentiment towards the split plan, which could impact investor confidence and short-term stock performance.
- Compliance Pressure: The reverse split is a strategic response to Nasdaq's compliance requirements regarding minimum stock price; failure to meet this standard could lead to delisting risks, thereby affecting the company's fundraising capabilities and market reputation.
- Shareholder Impact: The reverse split will reduce the number of shares held by each shareholder, but the value per share is expected to increase, which may influence shareholder returns and the company's capital structure in the long run.
- Significant Revenue Growth: DarkIris Inc reported a year-over-year revenue increase of 27.3% for FY25, reaching $10.08 million compared to $7.92 million in FY24, indicating strong market performance and growth potential.
- Stock Price Surge: Following the positive earnings report, DarkIris shares jumped 104.2% in pre-market trading to $0.68, reflecting investor optimism about the company's future prospects.
- Positive Market Reaction: The release of this earnings report has significantly increased market attention on DarkIris, enhancing investor confidence in its continued growth and potentially attracting more capital inflow.
- Optimistic Industry Outlook: The robust performance of DarkIris not only strengthens its market position but may also provide more opportunities for future financing and expansion plans, further solidifying its competitive edge in the industry.

Revenue and Loss Overview: ClearSign Technologies Corp reported a revenue of approximately $1 million for Q3 2025, a decrease from $1.9 million in Q3 2024, alongside an increased net loss of about $274,000 compared to the previous year.
Gross Margin Improvement: The company experienced a significant increase in gross margin by approximately 6.1 percentage points in Q3 2025 compared to Q3 2024, indicating improved profitability despite lower revenues.
Cash Position and Operations: ClearSign holds approximately $10.5 million in cash and cash equivalents as of September 30, 2025, but used about $1.8 million in operations during Q3 2025, up from $1.4 million in the same period last year.
Market Dynamics and Product Development: The company is seeing increased orders from the US Gulf Coast and has received interest from global supermajors, while also focusing on product development, particularly in the midstream gas industry with the M series product line.









