Welcome to our dedicated page for Clearsign Technologies SEC filings (Ticker: CLIR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The ClearSign Technologies Corporation (CLIR) SEC filings page on Stock Titan aggregates the company’s official disclosures filed with the U.S. Securities and Exchange Commission. ClearSign is a Delaware corporation listed on the Nasdaq Capital Market, and its filings provide detailed information about its combustion and sensing technologies, financial condition, governance, capital structure, and listing status.
Through annual reports on Form 10‑K and quarterly reports on Form 10‑Q, ClearSign discusses its business of designing and developing technologies for industrial and commercial combustion systems, including its ClearSign Core™ and ClearSign Eye™ platforms, target markets in energy, boilers, chemical and petrochemical industries, and key risk factors. These reports also contain audited and unaudited financial statements, management’s discussion and analysis, and information about its status as a smaller reporting company and non-accelerated filer.
Current reports on Form 8‑K give more frequent updates on material events. Recent 8‑K filings describe preliminary financial results and related press releases, conference call transcripts, Nasdaq notices regarding minimum bid price and board independence requirements, extensions to regain compliance, changes in board and committee composition, adoption of amended and restated bylaws, and modifications to equity award agreements. Other 8‑Ks report on annual meeting voting results and auditor ratification.
ClearSign’s registration statements on Form S‑1 and S‑1/A outline the terms of redeemable warrants and the registration of shares of common stock underlying those warrants. These documents explain the potential proceeds from warrant exercises, intended use of funds, and confirm the company’s Nasdaq listing under the symbol “CLIR.”
On Stock Titan, AI-powered tools can help interpret these filings by summarizing long documents, highlighting key sections on revenue drivers, risk disclosures, governance changes, and capital markets activity, and making it easier to track developments such as listing compliance, equity incentive plans, and warrant-related registrations across ClearSign’s regulatory history.
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.
ClearSign Technologies Corporation announced that it has regained compliance with Nasdaq’s minimum bid price requirement for continued listing on the Nasdaq Capital Market. Nasdaq confirmed that the company’s common stock closed at or above $1.00 per share for at least ten consecutive business days, satisfying Nasdaq Listing Rule 5550(a)(2). Nasdaq stated that the compliance matter is now closed, meaning ClearSign’s shares remain listed on the Nasdaq Capital Market.