ClearSign Technologies Reports Record Results for Q4 and FY2025; Expanding Orders and Hydrogen Initiatives

TULSA, Okla., April 9, 2026 – ClearSign Technologies Corporation (Nasdaq: CLIR) has released its results for the fourth quarter and full year ended December 31, 2025, posting record-breaking revenue and marking significant strategic progress across core business segments. The company, which specializes in advanced combustion and sensing technologies for industrial emission reduction and efficiency, provided a comprehensive update that is likely to draw investor attention.

Key Financial Highlights

• Record Quarterly Revenue: Q4 2025 saw revenue reach an all-time high of \$3.7 million.
• Record Annual Revenue: Full-year revenue climbed to \$5.2 million, representing a 44% year-over-year increase.
• Strong Cash Position: The company ended 2025 with approximately \$9.2 million in cash and cash equivalents.
• Reverse Stock Split: As of December 31, 2025, ClearSign had 5,328,730 shares outstanding, reflecting a 1-for-10 reverse stock split effective March 16, 2026. This action may affect share liquidity and price and should be closely monitored by shareholders.

Operational and Strategic Milestones

• Major Orders Secured:
  • Integrated Petroleum Producer (Gulf Coast): Engineering order for the first phase of a process heater retrofit, totaling 36 ClearSign Core™ burners.
  • Major Refiner (California): First phase order for 32 ClearSign Core™ burners for a process heater retrofit.
• Hydrogen-Capable Technology Advancement: Successfully completed Department of Energy/Small Business Innovation Research testing of the ClearSign Core™ 2 flexible fuel burner, capable of utilizing up to 100% hydrogen and achieving sub-5ppm NOx emissions. This positions ClearSign at the forefront of future hydrogen-fueled industrial applications.
• Fifth Low-Emission Flare Order: Secured an order for a total retrofit enclosed flare system for a California energy company, including upgraded flare technology, stack components, and controls. Delivery is scheduled for Q3 2026. This expands ClearSign’s reach beyond burners into broader emission and system integration solutions.
• Comprehensive Hydrogen Burner Testing Order: A major petrochemical client ordered extensive performance mapping for 100% hydrogen-capable burners, indicating growing commercial interest in hydrogen fuel solutions.
• Heater Manufacturer Partnerships: Two orders for ClearSign Core™ “M” Series M25 burners were received from Devco Process Heaters. One unit has shipped for a hot oil heater in New Mexico, and another is operational in West Texas for a multinational energy company.

Forward-Looking Statements and Growth Outlook

CEO Jim Deller, Ph.D., underlined the company’s momentum, citing a robust and expanding proposal pipeline and a growing backlog of orders, including projects for new heater configurations previously out of reach. He emphasized the adaptability of ClearSign’s technology, especially the new flexible fuel Core-2 burner, which opens opportunities across a broader customer base and supports the transition to hydrogen and ultra-low emissions.

The company’s priorities moving forward include growing the proposal pipeline, converting opportunities into orders, strengthening its reference base, and demonstrating operational success in new installations.

Shareholder-Relevant and Potentially Price-Sensitive Information

• Record Revenues and Cash Position: These results highlight ClearSign’s accelerating commercial adoption and financial health, both of which are likely to influence investor sentiment and share price.
• Large Orders and Backlog Growth: Multi-phase orders from major refiners and petrochemical clients indicate increasing market penetration and validation of ClearSign’s technology.
• Hydrogen Capabilities: Successful DOE-backed testing and multiple customer engagements around 100% hydrogen-capable burners position the company at the leading edge of decarbonization technology—a theme that is likely to attract further market attention and investment.
• Reverse Stock Split: This corporate action could affect share price and trading dynamics, and shareholders should be aware of its impact on liquidity and valuation metrics.
• Product Diversification: Expansion beyond burners (e.g., flare and system integration) could open new revenue streams and reduce dependency on any single market segment.

These developments, especially the surge in orders and advancements in hydrogen technology, are significant and may materially impact the company’s valuation and investor outlook.

Investor Call Details

ClearSign is hosting a conference call at 5:00 PM ET on April 9, 2026. U.S. investors may dial 1-888-506-0062 (international: 1-973-528-0011) with access code 837062, or participate via the company’s website. A Q&A session will follow, and a webcast replay will be available for at least 90 days.

About ClearSign Technologies Corporation

ClearSign designs and develops products aimed at decarbonizing industrial and commercial systems, with a focus on operational performance, energy efficiency, emission reduction, hydrogen fuel use, and safety. Its patented technologies serve the energy, chemical, petrochemical, transport, and power industries.

Disclaimer

This article contains forward-looking statements regarding ClearSign Technologies Corporation’s future performance and outlook. These statements are subject to risks, uncertainties, and assumptions that could cause actual results to differ materially. Investors should consult the company’s filings with the SEC for a full discussion of risk factors. The information herein does not constitute investment advice.

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