16 December 2025
Disclaimer: This is a simplified summary of a public company filing. See full disclaimer here.
ClearSign Technologies Corp
CIK: 1434524•2 Annual Reports•Latest: 2025-03-31
10-K / March 31, 2025
Revenue:$3,600,000
Income:-$5,299,000
10-K / April 26, 2024
Revenue:$2,403,000
Income:-$5,194,000
10-K / March 31, 2025
Summary of ClearSign Technologies Corporation
Business Overview
-
Core Technology:
- ClearSign Core™, a patented combustion enhancement technology that uses either a porous ceramic or metal flame stabilizing structure to significantly reduce flame length and emissions, notably NOx.
- Functionality:
- Improves combustion efficiency without external flue gas recirculation, SCRs, or high excess air systems.
- Creates shorter, more stable flames for better heat transfer.
- Operates effectively with fuels containing up to 80% hydrogen, including burning "pure" hydrogen, controlling NOx emissions to regulatory levels.
- Applications:
- Process burners in oil refining and gas processing industries.
- Boiler burners for steam and hot water generation.
- Flare burners for waste gas management.
- Flaring systems, OEM burner replacements, and retrofits.
-
Associated Products:
- Flame Sensing:
- ClearSign Eye flame sensor, a non-contact, reliable flame detection technology suitable for existing and new burners, with potential markets beyond combustion, including transportation.
- Research & Development:
- Developing hydrogen-capable burners and sensors for broader markets, funded by government grants.
- Flame Sensing:
Market Focus
- Industries Targeted:
- Oil refineries, natural gas processing, chemical plants.
- Industrial boilers, institutional and commercial boilers.
- Enclosed ground flares and thermal oxidizers.
- Enhanced oil recovery steam generators.
- Regulatory Environment:
- Focused on regions with stringent NOx emission standards, like California, Texas, Europe, Middle East, parts of Asia, and Canada.
- Examples include California’s recent BACT guidelines and stricter NOx regulations impacting the adoption of low-emission burners.
- Market Drivers:
- Increasing regulations to reduce NOx and greenhouse gases.
- Demand for more cost-effective and efficient pollution control solutions.
- Trends toward decarbonization and hydrogen fuel use.
Company Operations & Customers
- Number of Employees: 18 full-time employees (as of December 31, 2024).
- Revenue:
- 2024: $3.6 million
- 2023: $2.4 million
- Revenue growth of approximately 49.6% year-over-year.
- Profitability:
- Net loss in 2024 of $5.3 million, a slight increase from $5.2 million in 2023.
- Gross profit for 2024: $1.1 million, with a gross margin of about 31.1%.
- Customer Concentration:
- Two California refineries account for approximately 86% of revenue in both 2024 and 2023.
- No other customers represented more than 10% of revenue for these years.
- Major Customers:
- California refineries, with project orders and retrofit installations ongoing.
- International order in Europe with a refinery.
Revenue and Business Development
- Orders & Installations:
- Six process heaters retrofitted with ClearSign Core burners, including installations in California and Europe.
- Recent project orders include a chemical company in Texas and multiple California refineries.
- Delivery & installation delays due to project timing, with some projects expected to complete in 2025.
- Collaborations:
- Zeeco: Partnered for manufacturing and marketing process burners globally; announced launch of co-branded products.
- California Boiler: Collaborates on boiler burners and flare solutions.
- Developing sensors for industrial and transportation markets, with pilot installations ongoing.
- Research & Grants:
- Significant funding from DOE (~$1.9 million) for hydrogen burner R&D.
Strategic & Market Positioning
- Focus on developing standardized, repeatable burner designs for rapid adoption.
- Leverages collaborations to expand manufacturing and sales.
- Positioning to meet growing environmental regulations by offering cleaner, more efficient combustion solutions.
- Intends to continue expanding product applications, including low NOx burners and hydrogen-fueled burners, for markets globally.
Note:
- The company’s operations are primarily based in the U.S., with initial international orders and partnerships.
- The business is still in growth and commercialization phases, with recent orders and collaborations representing progress but not yet achieving profitability.
