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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.

ClearSign Technologies stock fell over 20% after hours after announcing a proposed public offering of common stock to raise capital.

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.

ClearSign Technologies Corporation (CLIR) Q1 2026 Earnings Call Transcript

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. "We made notable progress at the start of the year," said Jim Deller, Ph.D.

Burner Sold by Heater Manufacturer Tulsa Heaters Midstream 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 announces that it has received a purchase order for a ClearSign M1 burner, one of its "M" Series process burners, from heater manufacturer Tulsa Heaters Midstream ("THM"). "We are happy to see continued interest in this midstream product line," said Jim Deller, Ph.D.

Project encompasses Two Heaters and Consists of New Flat Flame Application TULSA, OK / ACCESS Newswire / May 14, 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 it has received a purchase order for the physical testing and demonstration of burners as the second phase of a process heater retrofit project comprising of a total of 32 ClearSign Core™ burners to be installed in the customers California refinery. "We are pleased to have completed the initial engineering and computational simulation for this large project for a major refinery in the California market, and to now move into testing and demonstrating the physical burners at Zeeco's full-scale test facility," said Jim Deller, Ph.D.

Hosting Call at 5pm ET on Wednesday, May 20th TULSA, OK / ACCESS Newswire / May 6, 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, announces that on Wednesday, May 20th, 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 March 31, 2026, in a press release on the day of the call.

ClearSign Technologies Corporation (NASDAQ: CLIR - Get Free Report)'s share price passed above its fifty day moving average during trading on Thursday. The stock has a fifty day moving average of $5.14 and traded as high as $5.50. ClearSign Technologies shares last traded at $5.16, with a volume of 15,246 shares changing hands. Wall Street

ClearSign Technologies (NASDAQ: CLIR) is positioning its low-emissions combustion equipment around tightening nitrogen oxides (NOx) requirements in industrial markets, Chief Executive Officer Dr. Jim Deller said during a Water Tower Research (WTR) Insights Conference fireside chat moderated by Peter Gastreich, WTR's managing director for energy transition and sustainable investing. Business focus: low-NOx combustion equipment for industrial

ClearSign Technologies Corporation (CLIR) Q4 2025 Earnings Call Transcript

Achieves Record Quarterly Revenue of $3.7 Million Annual Revenue Up 44% to Record $5.2 Million TULSA, OK / ACCESS Newswire / April 9, 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 an update on operations for the fourth quarter and full year ended December 31, 2025. "We're pleased to have closed the year on a high note, delivering record results for both the fourth quarter and the full year.

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. The presentation will be hosted by WTR Analyst, Peter Gastreich - Managing Director at Water Tower Research, and will cover the following topics: Company Overview and Strategy How the Technology Works Competitive Advantages Pipeline and Order Trajectory Registration for the event can be found here: EVENT REGISTRATION LINK The WTR Insights Conference is a virtual event designed for investors seeking direct access to company management teams and differentiated insights across innovative businesses spanning all sectors covered by Water Tower Research.

Hosting Call at 5pm ET on Thursday, April 9th TULSA, OK / ACCESS Newswire / March 26, 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, announces that on Thursday, April 9, 2026, the Company will host a conference call at 5:00 PM ET. The Company will file its annual report on form 10-K with the SEC in the coming days and will issue a summary of its financial and operating results for the year and quarter ending on December 31, 2025, in a press release on the day of the call.

Partnered with National Energy Technology Laboratory to Advance Flexible Fuel, Ultra-Low NOx Combustion for Industrial Operations TULSA, OK / ACCESS Newswire / March 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 safety, and support the use of cleaner fuels including hydrogen, announces today that, in conjunction with the U.S. Department of Energy's ("DOE") National Energy Technology Laboratory ("NETL"), under its Small Business Innovation Research ("SBIR") program, it has successfully completed the testing of its ClearSign Core™ Flexible Fuel, 100% Hydrogen Capable process burner branded as ClearSign Core™ 2. "We are very pleased to publicly report the success of this flexible fuel burner development project," said Jim Deller, Ph.D.

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.
