ClearSign Technologies (CLIR) Q4 2025 earnings summary

Executive summary

• Focused on decarbonization and improved efficiency for industrial combustion systems, with ClearSign Core™ technology deployed in commercial projects and new product lines for process burners, boilers, flares, and sensing solutions.

• Revenue increased 45.6% year-over-year to $5.2 million, driven by process burner and flare orders, but the company continues to operate at a net loss and expects negative cash flow for the foreseeable future.

• Maintains an asset-light model, leveraging strategic partnerships with OEMs like Zeeco and California Boiler to expand market reach and reduce overhead.

Financial highlights

• Revenue for 2025 was $5.2 million, up from $3.6 million in 2024, primarily from process burners and flares.

• Gross profit rose 27.4% to $1.4 million, but was offset by increased warranty accruals.

• Net loss for 2025 was $5.5 million, compared to $5.3 million in 2024.

• Cash and cash equivalents at year-end 2025 totaled $9.2 million, down from $14.0 million in 2024.

• Working capital at year-end 2025 was $8.6 million.

Outlook and guidance

• Management expects continued operating losses and negative cash flow until recurring sales and market acceptance are achieved.

• Sufficient cash is available to fund operations for over twelve months; additional capital may be raised through equity offerings if needed.

• Anticipates increased demand for low-NOx technologies due to tightening emissions regulations in the U.S. and globally.