CLIR

TULSA, OK / ACCESS Newswire / August 11, 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 industry veteran Larry Saddler has been appointed to fill the vacant directorship on the Company's Board of Directors (the "Board"). "We are very excited to have Larry join the Board," said Jim Deller, Ph.D.

Hosting Call at 5pm ET on Wednesday, August 19th TULSA, OK / ACCESS Newswire / August 5, 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, announces that on Wednesday, August 19th, 2026, 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 June 30, 2026, in a press release on the day of the call.

Third Burner Sold by THM for same West Texas customer TULSA, OK / ACCESS Newswire / July 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 has received another purchase order for a ClearSign Core™ M1 burner. The order was received from heater manufacturer Tulsa Heaters Midstream ("THM") and is the third order from this customer within a couple of months.

At the Market Transaction With Existing Stockholder TULSA, OK / ACCESS Newswire / July 23, 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 completion of a private placement (the "Placement") of 500,000 shares of its common stock, par value $0.001 per share, with an existing stockholder at a price of $3.54 per share, the average closing price reported on Nasdaq for the five trading days ending on June 21, 2026, for gross proceeds of $1,770,000. The Placement closed on July 22, 2026.

Burners to be installed at Fortune 500 West Texas Midstream Facility TULSA, OK / ACCESS Newswire / July 1, 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 announced that it has received a purchase order for three ClearSign Core™ M1 burners from a heater manufacturer for their customer's West Texas facility. "We are pleased to see continued interest in this midstream product line," said Jim Deller, Ph.D.

Burner Sold by Heater Manufacturer Tulsa Heaters Midstream TULSA, OK / ACCESS Newswire / June 16, 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 has received another purchase order for a ClearSign Core™ M1 burner, one of its "M" Series process burners. The order came from heater manufacturer Tulsa Heaters Midstream ("THM") and is the second order from this customer within a month.

June 2, 2026, ST. PETERSBURG, FL – Water Tower Research (www.watertowerresearch.com) has published an Initiation of Coverage Report on ClearSign Technologies Corporation (NASDAQ: CLIR) titled, “Disruptive Burner Technology with 80% Cost Advantage Over Incumbent Tech”. The report can be accessed here. ClearSign is an industrial technology company that sells advanced burners that prevent NOx pollution at the source. CLIR's proprietary ClearSign Core™ technology addresses both chemical pathways responsible for NOx formation, frequently eliminating the need for expensive post-combustion treatment. CLIR offers investors a structural, non-discretionary compliance cycle driven by tightening NOx regulations worldwide, with a proven cost-advantaged technology platform that serves a large market of oil refiners, petrochemical plants, and gas processors.

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.

CLIR misses Q1 earnings estimates as revenues fall 52% y/y and warranty-related burner costs drive a gross loss despite lower operating expenses.