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as of 08-28-2026 3:55pm EST
ClearSign Technologies Corp is engaged in designing and develop technologies for the purpose of decarbonization and improving key performance characteristics of industrial and commercial combustion systems, including emission and operational performance, energy efficiency and overall cost-effectiveness. Its ClearSign Core technology has been proved to be in full scale industrial test furnaces and boilers and first customer installations are currently operating in normal commercial applications The company offers products that include process burners, boiler burners, flares, and ClearSign Eye. The company operates in one segment: Combustion segment. The products of the company include: Process Burners, Midstream and Power, Flares, Boiler Burners, and Sensing Technology.
| Founded: | 2008 | Country: | United States |
| Employees: | N/A | City: | TULSA |
| Market Cap: | 26.6M | IPO Year: | 2011 |
| Target Price: | $20.00 | AVG Volume (30 days): | 13.2K |
| Analyst Decision: | Strong Buy | Number of Analysts: | 1 |
| Dividend Yield: | N/A | Dividend Payout Frequency: | N/A |
| EPS: | -0.61 | EPS Growth: | -800.00 |
| 52 Week Low/High: | $0.39 - $7.56 | Next Earning Date: | 04-09-2026 |
| Revenue: | $530,000 | Revenue Growth: | -1.85% |
| Revenue Growth (this year): | 34.29% | Revenue Growth (next year): | 67.31% |
| P/E Ratio: | -7.43 | Index: | N/A |
| Free Cash Flow: | -4740000.0 | FCF Growth: | N/A |
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Stock Insider Trading Activity of ClearSign Technologies Corporation (DE) (CLIR)
10% Owner
Avg Cost/Share
$3.54
Shares
500,000
Total Value
$1,770,000.00
Owned After
1,343,477
SEC Form 4
| Insider | Ticker | Relationship | Date | Transaction | Avg Cost | Shares | Total Value | Owned After | SEC Forms |
|---|---|---|---|---|---|---|---|---|---|
| PASQUESI JOHN M | CLIR | 10% Owner | Jul 22, 2026 | Buy | $3.54 | 500,000 | $1,770,000.00 | 1,343,477 |
Earnings Transcripts
SEC 8-K filings with transcript text
2026 Q2 Q2 2026 Earnings
8-K BUY Aug 20, 2026 · 100% conf.
Q2 2026 Earnings
8-K BUYAug 20, 2026 · 100% conf.
1D
+2.69%
$4.81
Act: -4.40%
5D
+11.08%
$5.20
20D
+5.84%
$4.96
Transcript text not available. View on SEC.gov →
2026 Q1 Q1 2026 Earnings
8-K SELL May 21, 2026 · 100% conf.
Q1 2026 Earnings
8-K SELLMay 21, 2026 · 100% conf.
1D
-4.84%
$4.77
Act: -3.89%
5D
-6.78%
$4.67
Act: -6.44%
20D
+66.80%
$8.36
EX-99.1
2 tm2615171d1_ex99-1.htm
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
2026 Q1 Q1 2026 Earnings
8-K SELL Apr 10, 2026 · 100% conf.
Q1 2026 Earnings
8-K SELLApr 10, 2026 · 100% conf.
1D
-4.84%
$4.77
Act: -3.89%
5D
-6.78%
$4.67
Act: -6.44%
20D
+66.80%
$8.36
EX-99.1
2 tm2611530d1_ex99-1.htm
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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