Fourth Quarter Revenues up Approximately 510% Year-over-Year Full Year Revenues up Approximately 44% Year-over-Year TULSA, OK / ACCESS Newswire / January 7, 2026 / ClearSign Technologies Corporation (NASDAQ:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today provides selected preliminary, unaudited financial results for its fourth quarter and year ended December 31, 2025. Revenues for the fourth quarter are expected to be approximately $3.6 million compared to $590 thousand for the same period in 2024, reflecting a year-over-year revenue growth of approximately 510%, and revenues for the fiscal year ended December 31, 2025 are expected to be approximately $5.2 million compared to $3.6 million for the same period in 2024, reflecting a year-over-year revenue growth of approximately 44%.

ClearSign (CLIR) witnesses a hammer chart pattern, indicating support found by the stock after losing some value lately. This coupled with an upward trend in earnings estimate revisions could mean a trend reversal for the stock in the near term.

ClearSign Technologies Corporation ( CLIR ) Q3 2025 Earnings Call November 19, 2025 5:00 PM EST Company Participants Brent Hinds - Chief Financial Officer Colin James Deller - CEO, Corporate Secretary & Director Conference Call Participants Matthew Selinger Sameer Joshi - H.C. Wainwright & Co, LLC, Research Division Presentation Operator Greetings.

ClearSign Technologies (CLIR) came out with a quarterly loss of $0.03 per share versus the Zacks Consensus Estimate of a loss of $0.04. This compares to a loss of $0.02 per share a year ago.

Hosting Call at 5pm ET on Wednesday, November 19th TULSA, OK / ACCESS Newswire / November 6, 2025 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company an emerging leader in industrial combustion and sensing technologies that support decarbonization , improve operational and energy efficiency, enable the use of hydrogen as a fuel and enhance safety while dramatically reducing emissions, announces that on Wednesday, November 19, 2025, the Company will host a conference call at 5:00 PM ET. The Company will file its quarterly report on form 10-Q with the SEC in the coming days and will issue a summary of its financial and operating results for the quarter ending on September 30, 2025 in a press release on the day of the call.

Burner Sold by Heater Manufacturer Devco Process Heaters TULSA, OK / ACCESS Newswire / November 4, 2025 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today announces that it has received a purchase order for a ClearSign Core™ M25 burner, one of its "M" Series process burners, from heater manufacturer Devco Process Heaters of Tulsa, Oklahoma ("Devco"). "We're thrilled to see the growing interest in our ‘M' Series burner line translating into sales, with this second order from Devco coming within just one week," said Jim Deller, Ph.D.

Burner Sold by Heater Manufacturer Devco Process Heaters TULSA, OKLAHOMA / ACCESS Newswire / October 28, 2025 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today announces that it has received a purchase order for one of its "M" Series process burners, the ClearSign Core™ M25, from heater manufacturer Devco Process Heaters of Tulsa, Oklahoma ("Devco"). "We continue to see a growing interest in our new ‘M' Series process burner line, which we believe is an outstanding product for the midstream market.

TULSA, OK / ACCESS Newswire / October 23, 2025 / ClearSign Technologies Corporation (NASDAQ:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today announces it received an engineering order for a fourth low-emission retrofit flare burner from a major energy producer for deployment in California. "We're pleased to expand our partnership with this key customer as they continue to modernize their operations for stricter environmental standards," said Jim Deller, Ph.D.

CLIR lands its first engineering order for a 32-burner retrofit at a major California refinery.

Planned Retrofit of Two Process Heaters at a California Refinery Underscores Growing Adoption of ClearSign's Higher Efficiency, Low-Emission Combustion Solutions TULSA, OK / ACCESS Newswire / October 7, 2025 / ClearSign Technologies Corporation (Nasdaq:CLIR) ("ClearSign" or the "Company"), a leader in advanced combustion and sensing technologies that help industrial operators dramatically reduce emissions, increase efficiency and safety, and support the use of cleaner fuels including hydrogen, today announces that it has received the initial CFD and engineering order from a supermajor refiner as the first phase of a process heater retrofit for a total of 32 ClearSign Core™ burners to be installed in one of its California refineries. "We are pleased to announce a new order for another large-scale project from a supermajor refiner," said Jim Deller, Ph.D.