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ClearSign Technologies Corporation reported a net loss of $2.19 million for the quarter ended March 31, 2026, slightly wider than the $2.08 million loss a year earlier. Revenue was $191 thousand, down from $401 thousand, as Q1 2025 included larger spare parts and engineering orders.
The company generated a gross loss of $393 thousand versus a prior gross profit, mainly due to a roughly $410 thousand warranty-related cost tied to process burners installed in 2025. Operating expenses fell to $1.89 million, driven by lower R&D and reduced legal spending after a prior special committee.
Cash and cash equivalents were $7.74 million with working capital of $6.61 million and no debt, and management believes this supports more than twelve months of operations. A 1-for-10 reverse stock split effective March 16, 2026 brought the share price back into compliance with Nasdaq’s minimum bid requirement.
ClearSign Technologies Corporation is asking stockholders to vote at its virtual 2026 annual meeting on June 8, 2026. Proposals include electing four directors, ratifying BPM CPA LLP as auditor, advisory approval of executive pay, and a possible adjournment if needed for quorum or plan approval.
A key item is approval of an amended and restated 2021 Equity Incentive Plan that would increase the share reserve by 1,077,007 shares to 1,500,000 shares and revise the evergreen feature and option post-termination exercise periods. The proxy also describes a recent 1-for-10 reverse stock split, director compensation, governance structure, and board committee roles.
ClearSign Technologies Corp Chief Executive Officer Colin James Deller amended a prior insider report to correct details of a stock bonus. On February 26, 2026, he received 7,001 shares of common stock as a one-time bonus grant, valued at $5.616 per share after a 1-for-10 reverse split.
To cover taxes, 3,501 shares were disposed of through tax withholding, a non-market transaction, leaving Deller with 34,967 common shares held directly. The amendment updates the originally reported grant size, tax-withheld amount, and resulting beneficial ownership tied to 2025 executive services.
ClearSign Technologies Corp director Gil Todd Silva bought additional shares of the company in the open market. On April 23, 2026, the reporting person made two separate open-market purchases of 1,000 shares each of ClearSign common stock, at prices of $5.319 and $5.25 per share, increasing their direct investment in the company.
ClearSign Technologies Corporation reported record results for 2025, with full-year revenue of $5.2 million, up 44% from 2024, and fourth quarter revenue of $3.7 million. Growth was driven mainly by a 26-burner process heater order for a petrochemical plant on the Texas Gulf Coast, alongside contributions from midstream burners, flares, spare parts, and engineering services.
Gross margin for 2025 was 27%, down from 31% the prior year, primarily due to higher warranty accruals. Net loss increased by about $197,000, largely reflecting $746,000 in non-recurring legal fees. Operating cash outflow was $4.7 million, and the company ended 2025 with $9.2 million in cash and approximately 5.3 million common shares outstanding.
Management highlighted growing demand for its ultra-low NOx burner technology, including 36- and 32-burner retrofit orders for major refiners, expanding flare system projects that can approach $1 million per order, and a proposal pipeline of roughly 225 process burners. ClearSign targets breakeven at around $16 million in annual revenue, or about 160 process burners per year, leveraging an asset-light model and manufacturing partnerships such as Zeeco.
ClearSign Technologies director Lou Basenese received a grant of stock options as board compensation. He was awarded non-statutory options to purchase 3,024 shares of common stock at an exercise price of $4.36 per share for service as a non-employee director for the quarter ended March 31, 2026.
The options were granted under the ClearSign Technologies Corporation 2021 Equity Incentive Plan pursuant to the company’s non-employee director compensation policy. They vested and became exercisable immediately on the March 31, 2026 grant date and expire on March 31, 2036. No open-market share purchases or sales were reported.
ClearSign Technologies Corp director Silva Gil Todd received new equity compensation awards for board service. For the quarter ended March 31, 2026, the director was granted 3,440 restricted stock units and non‑statutory stock options for 3,024 shares of common stock.
The RSUs each represent one share of common stock or its cash equivalent and vest upon the earliest of a change in control, disability, death, or separation from service. The stock options were immediately vested and exercisable on the grant date, have a $4.36 exercise price, and expire on March 31, 2036. Following these awards, the director directly owns 123,909 shares of common stock.
ClearSign Technologies Corp director Anthony Digiandomenico received a grant of 3,024 non-statutory stock options as compensation for serving as a non-employee director for the quarter ended March 31, 2026. The options have an exercise price of $4.36 per share, are immediately vested and exercisable, and expire on March 31, 2036.
ClearSign Technologies Corporation describes its business and risks in an annual report, focusing on its ClearSign Core™ combustion technology and ClearSign Eye sensing products for industrial burners, boilers, process heaters and flares. The company emphasizes an asset-light model, partnering with OEMs like Zeeco and California Boiler to manufacture and distribute low-NOx burners and flare systems that aim to cut emissions and improve efficiency versus legacy solutions.
As of June 30, 2025, non‑affiliate equity market value was $27,596,237, and as of March 16, 2026, there were 5,408,723 common shares outstanding, adjusted for a 1‑for‑10 reverse stock split effective March 16, 2026. ClearSign reports an accumulated deficit of about $104.5 million, continues to fund operations largely via equity sales and government grants, and highlights heavy revenue concentration in a few refinery and engineering customers alongside extensive regulatory and market‑adoption risks.