AI Earnings Predictions for ClearSign Technologies Corporation (DE) (CLIR)

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

ClearSign Technologies Corporation Provides First Quarter 2026 Update

TULSA, Okla., 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., Chief Executive Officer of ClearSign. “We expanded the scope of a flare order to include a full system and secured a fifth order from an energy customer in California. We also successfully completed a well-attended process burner demonstration at Zeeco Inc. that showcased the capabilities of our new ClearSign Core Gen 2 technology. Most recently, we received another “M” Series burner order destined for West Texas. We remain encouraged by the strong level of engagement and the steady flow of customer requests for proposals that we continue to receive.”

Strategic and Operational Highlights

Recent strategic and operational highlights during and subsequent to the first quarter of 2026:

ClearSign Received “M1” Series Burner Order for Midstream Heater in West Texas: The ClearSign Core™ M1 burner, sold through Tulsa Heaters Midstream, will be installed in a new heater at a gas processing facility of a multinational energy company in West Texas. The Company expects to deliver the burner in the third quarter of 2026.

Received Order for Next Phase of 32 Burner Project for California Refinery: The Company received a purchase order for the physical testing and demonstration of burners as the second phase of a process heater retrofit project comprising a total of 32 ClearSign Core™ burners to be installed in the customer’s California refinery.

Reported Successful Sub 5ppm Department of Energy/Small Business Innovation Research Flexible Fuel Burner Testing: In conjunction with the U.S. Department of Energy’s (“DOE”) National Energy Technology Laboratory, under its Small Business Innovation Research (“SBIR”) program, the Company successfully completed the testing of its ClearSign Core™ Flexible Fuel, 100% Hydrogen Capable process burner branded as ClearSign Core™ 2.

Received Fifth Low-Emission Flare

Order from an Energy Company in California: The Company received an order covering engineering and product delivery for a total retrofit enclosed flare system at a production facility in California’s San Joaquin Valley, scheduled for delivery in the third quarter of 2026. The scope of the order includes upgraded flare technology, stack components, and control upgrades, further expanding ClearSign’s engagement beyond burner technology and into broader emission and system integration solutions.

Financial Information

Cash and cash equivalents were approximately $7.7 million as of March 31, 2026.

There were 5,409,133 shares of the Company’s common stock issued and outstanding as of March 31, 2026, which reflects the 1-for-10 reverse stock split of the Company’s shares of common stock that became effective on March 16, 2026.

Conference Call

The Company will be hosting a call at 5:00 PM ET today. Investors interested in participating on the live call can dial 1-888-506-0062 within the U.S. or 1-973-528-0011 from abroad, both using Participant Access Code: 961399 Investors can also access the call online through a listen-only webcast at https://www.webcaster5.com/Webcast/Page/3133/53993 or on the investor relations section of the Company’s website at http://ir.clearsign.com/overview.

The Company will host a Q&A session during the call and investors wishing to submit a question ahead of time can do so by emailing questions to mselinger@firmirgroup.com.

The webcast will be archived on the Company’s investor relations website for at least 90 days and a telephonic playback of the conference call will be available by calling 877-481-4010 within the U.S. or 919-882-2331 from abroad using Replay Passcode # 53993. The telephonic playback will be available for 7 days after the conference call.

About ClearSign Technologies Corporation

ClearSign Technologies Corporation designs and develops products and technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial systems, including operational performance, energy efficiency, emission reduction, safety, the use of hydrogen as a fuel and overall cost-effectiveness. The Company’s patented technologies, embedded in established OEM products as ClearSign Core™ and ClearSign Eye™ and other sensing configurations, enhance the performance of combustion systems and fuel safety systems in a broad range of markets, including the energy (upstream oil production and downstream refining), commercial/industrial boiler, chemical, petrochemical, transpor

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

ClearSign Technologies Corporation Provides Fourth Quarter and Full Year 2025 Update

Achieves Record Quarterly Revenue of $3.7 Million

Annual Revenue Up 44% to Record $5.2 Million

TULSA, Okla., 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. We believe that this performance reflects ClearSign’s growing recognition across the industry and increasing traction in our markets,” said Jim Deller, Ph.D., Chief Executive Officer of ClearSign. “We expect this momentum to continue, supported by a strong and expanding proposal pipeline. Our highly adaptable, new flexible fuel ClearSign Core-2 process burner technology, which delivers ultra-low emissions while utilizing fuel blends, including up to 100% hydrogen, enables us to provide combustion solutions for a broader range of customer applications. These innovations have already led to an increase in our backlog of orders, which now includes projects for new heater configurations that we previously would not have been able to address.”

“We anticipate that these, and other ongoing projects, when completed and operational will strengthen our track record and expand our base of references. Looking ahead, our priorities are clear: continue to grow our proposal pipeline and convert those opportunities into orders,” concluded Dr. Deller.

Strategic and Operational Highlights

Recent strategic and operational highlights including, and subsequent to, the fourth quarter of 2025:

Received Engineering Orders for 36 Process Burner Heaters and 32 Burner Process Heaters: The Company received two separate orders: (1) the first order was from an integrated petroleum producer as the first phase of a process heater retrofit for a total of 36 ClearSign Core™ burners to be installed in their U.S. Gulf Coast refinery, and (2) the second order was from a major 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.

Reported Successful Sub 5ppm Department of Energy/Small Business Innovation Research Flexible Fuel Burner Testing: In conjunction with the U.S. Department of Energy's (“DOE”) National Energy Technology Laboratory (“NETL”), under its Small Business Innovation Research (“SBIR”) program, the Company successfully completed the testing of its ClearSign Core™ Flexible Fuel, 100% Hydrogen Capable process burner branded as ClearSign Core™ 2.

Received Fifth Low-Emission Flare Order from an Energy Company in

California: The Company received an order covering engineering and product delivery for a total retrofit enclosed flare system at a production facility in California's San Joaquin Valley, scheduled for delivery in the third quarter of 2026. The scope of the order includes upgraded flare technology, stack components, and control upgrades, further expanding ClearSign’s engagement beyond burner technology and into broader emission and system integration solutions.

Received Order for Comprehensive Testing of 100% Hydrogen Capable Burner from Petrochemical Client Requesting Performance Mapping for Future Deployment: The Company received an order for a comprehensive range of process burner testing from a major petrochemical customer. The testing included the collection of comprehensive operational data over a range of operating conditions and fuel blends.

Received Two Separate ClearSign CoreTM “M” Series Burner Orders from Heater Manufacturer Devco Process Heaters: Both orders are for the new ClearSign Core™ M25. One of these orders has shipped and is awaiting installation in a hot oil heater at a New Mexico gas processing facility and the other has been installed and successfully started up in a gas processing facility of a multinational energy company in West Texas.

Financial Information

Cash and cash equivalents were approximately $9.2 million as of December 31, 2025.

There were 5,328,730 shares of the Company’s common stock issued and outstanding as of December 31, 2025, which reflects the 1-for-10 reverse stock split of our shares of common stock that became effective on March 16, 2026.

Conference Call

The Company will be hosting a call at 5:00 PM ET today. Investors interested in participating on the live call can dial 1-888-506-0062 within the U.S. or 1-973-528-0011 from abroad, both using Participant Access Code: 837062. Investors can also access the call online through a listen-only webcast at  https://www.webcaster5.com/Webcast/Page/3

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported): February 24, 2026

CLEARSIGN TECHNOLOGIES CORPORATION

(Exact name of registrant as specified in charter)

Delaware

001-35521

26-2056298

(State or other jurisdiction of

incorporation)

(Commission File Number)

(IRS Employer

Identification No.)

8023 E. 63rd Place, Suite 101

Tulsa, Oklahoma 74133

(Address of Principal Executive Offices and Zip Code)

(918) 236-6461

(Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions (see General Instruction A.2 below).

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13(e)-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which

registered

common stock

CLIR

The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Item 2.02.Results of Operations and Financial Condition.

To the extent required by Item 2.02 of Form 8-K, the information set forth below in Item 7.01 of this Current Report on Form 8-K is incorporated by reference herein in its entirety.

Item 7.01Regulation FD Disclosure.

On February 24, 2026, the Company held a conference call to discuss certain preliminary and unaudited financial information for the fourth quarter and fiscal year ended December 31, 2025 and certain corporate updates. The selected preliminary financial information are preliminary, unaudited, and are subject to change upon completion of the Company’s financial statement closing procedures. Accordingly, undue reliance should not be placed on these preliminary estimates.

The preliminary financial data has been prepared by, and is the responsibility of, the Company’s management. BPM CPA LLP (“BPM”), the Company’s independent registered public accounting firm, has not audited, reviewed, compiled or performed any procedures with respect to the accompanying preliminary financial data. Accordingly, BPM does not express an opinion or any other form of assurance with respect thereto. A copy of the transcript of this conference call is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

The information set forth in this Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.

Description

99.1*

Transcript of Conference Call held on February 24, 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

* Furnished herewith.

2

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: February 25, 2026

CLEARSIGN TECHNOLOGIES CORPORATION

By: /s/ Colin James Deller

Name: Colin James Deller

Title: Chief Executive Officer

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