ClearSign Technologies Corp
ClearSign Technologies Corporation (Nasdaq: CLIR) designs and develops combustion technologies intended to reduce emissions and improve the operating performance of industrial and commercial combustion systems. Its ClearSign Core technology uses a flame-stabilizing structure in process-heater and boiler burners and… From the company’s description.
Over the twelve months to Jun 30, 2026, ClearSign Technologies Corp reported revenue of $5.45M, up 82.7% from a year earlier, and a net loss of $5.24M. Its operating margin was −116.5%, and operations used $5.70M in cash. In fiscal 2025, it reported revenue of $5.23M, up 45.6% from fiscal 2024, and a net loss of $5.50M.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What ClearSign Technologies Corp does
In the company’s own words
ClearSign Technologies Corporation (Nasdaq: CLIR) designs and develops combustion technologies intended to reduce emissions and improve the operating performance of industrial and commercial combustion systems. Its ClearSign Core technology uses a flame-stabilizing structure in process-heater and boiler burners and flares to reduce nitrogen oxide emissions; products serve customers in refining, petrochemical, energy infrastructure, gas processing, oil production, and institutional, commercial, and industrial boiler markets. The company also develops ClearSign Eye flame sensors for industrial burners, with potential applications in transportation. ClearSign has one operating segment, developing and commercializing combustion and sensing technologies. It pursues an asset-light model, working with equipment makers and service providers, including Zeeco and California Boiler, to manufacture, market, install, and support products. Its offerings include the M-Series process burners and boiler solutions branded NZN, S5, and S9. During 2025, its products included operating installations in process heaters, boilers, and flares, and it demonstrated a hydrogen-fueled burner at an industrial-scale test facility. Its website is https://www.clearsign.com/.
Company details
- Sector
- Health Care
- Industry (SIC)
- Medical Instruments
- Headquarters
- TULSA, OK
- Fiscal year end
- December
- CIK
- 1434524
- SIC
- 3823
Financial performance, year by year
Fiscal 2012–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns ClearSign Technologies Corp — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · ClearSign Technologies Corp’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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