ClearSign Technologies Corporation - Common Stock (CLIR)

TULSA, OK / ACCESS Newswire / May 29, 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 support the use of cleaner fuels including hydrogen, today announces the pricing of an underwritten public offering with primarily existing stockholders of 777,780 shares of its common stock (the "Public Offering") at a price to the public of $4.33 per share, for gross proceeds of $3,367,787. The Company has also granted to the underwriter a 30-day option to purchase, at the same price per share as the underwriter paid for the initial shares, up to an additional 15% of the shares of common stock offered in the Public Offering to cover over-allotments in connection with the Public Offering, which if exercised in full would increase the gross proceeds to $3,872,955.51.

TULSA, OK / ACCESS Newswire / May 28, 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 support the use of cleaner fuels including hydrogen, today announces that it is proposing to sell shares of its common stock in an underwritten public offering (the "Public Offering"). All of the shares in the Public Offering are to be sold by ClearSign. ClearSign intends to grant the underwriter a 30-day option to purchase up to an additional 15% of the shares of common stock offered in the Public Offering at the Public Offering price, less the underwriting discount.

TULSA, OK / ACCESS Newswire / May 20, 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 support the use of cleaner fuels including hydrogen, today provides an update on operations for the quarter ended March 31, 2026.

Burner Sold by Heater Manufacturer Tulsa Heaters Midstream

Project encompasses Two Heaters and Consists of New Flat Flame Application

Hosting Call at 5pm ET on Wednesday, May 20th

Achieves Record Quarterly Revenue of $3.7 Million

TULSA, OK / ACCESS Newswire / April 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 announced that Chief Executive Officer Jim Deller, will participate in the upcoming Water Tower Research Insights Conference taking place on April 15, 2026, at 3:10 pm ET.

Hosting Call at 5pm ET on Thursday, April 9th

Partnered with National Energy Technology Laboratory to Advance Flexible Fuel, Ultra-Low NOx Combustion for Industrial Operations

TULSA, OKLAHOMA / ACCESS Newswire / March 10, 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 announced a 1-for-10 reverse stock split of its outstanding common stock. The reverse stock split will become effective at 12:01 a.m. ET on March 16, 2026. The common stock is expected to begin trading on a split-adjusted basis on the Nasdaq Capital Market ("Nasdaq") under the same symbol "CLIR" when the market opens on March 16, 2026, with the new CUSIP number 185064201.

Hosting Call at 5pm ET on Tuesday, February 24th

Order Entails Full System Retrofit

Fourth Quarter Revenues up Approximately 510% Year-over-Year

TULSA, OKLAHOMA / ACCESS Newswire / November 19, 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 provides an update on operations for the quarter ended September 30, 2025.

Hosting Call at 5pm ET on Wednesday, November 19th

Burner Sold by Heater Manufacturer Devco Process Heaters

Burner Sold by Heater Manufacturer Devco Process Heaters

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.

Planned Retrofit of Two Process Heaters at a California Refinery Underscores Growing Adoption of ClearSign's Higher Efficiency, Low-Emission Combustion Solutions

Petrochemical Client Requesting Performance Mapping for Future Deployment

Project Comprised of 36 ClearSign Core™ Process Burners in One Heater

Company to Present on Monday, September 8th at 2:30pm ET

TULSA, OKLAHOMA / ACCESS Newswire / August 14, 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 provides an update on operations for the quarter ended June 30, 2025.

TULSA, OK / ACCESS Newswire / August 8, 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 announced that Judith S. Schrecker and Catharine M. de Lacy have voluntarily resigned from the Company's Board of Directors (the "Board") on August 4, 2025, effective immediately. Following their resignations, the Board size was decreased from six directors to five directors.