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flag ClearSign Technologies saw 510% Q4 revenue growth in 2025, driven by a major burner order and rising demand for clean combustion tech.

flag ClearSign Technologies reported preliminary 2025 results showing fourth-quarter revenue of $3.6 million, a 510% jump from 2024, and full-year revenue of $5.2 million, up 44%. flag Growth was driven by a major 26-burner order for a Gulf Coast petrochemical plant and strong performance across testing, engineering, flares, and service work. flag The company cited expanding demand for low-NOx and hydrogen-capable burners, including its new 'M' Series, as key factors. flag CEO Jim Deller expressed confidence in sustained growth for 2026 due to increased market traction, a growing backlog, and its focus on clean combustion technologies. flag The results are unaudited and may change.

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