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 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.
ClearSign Technologies director Gil Todd Silva reported open-market purchases of the company’s common stock. He bought 2,000 shares on March 16, 2026 at $4.355 per share and another 2,000 shares on March 17, 2026 at $4.20 per share, bringing his direct holdings to 4,000 shares.
ClearSign Technologies Corporation is implementing a 1-for-10 reverse stock split of its common stock, effective at 12:01 a.m. Eastern Time on March 16, 2026. This will reduce outstanding shares from approximately 54.1 million to approximately 5.41 million, with no change to authorized shares or par value.
The reverse split is intended to increase the share price to regain compliance with Nasdaq’s $1.00 minimum bid price requirement. Each 10 pre-split shares will be combined into one share, while voting and other rights remain proportionate. No fractional shares will be issued; positions will be rounded up to the next whole share at the Depository Trust Company participant level.
ClearSign Technologies Corporation held a special stockholder meeting where investors approved an amendment to its certificate of incorporation to allow a reverse stock split of its common stock at a ratio between 1-for-2 and 1-for-10, to be implemented at the board’s discretion for the purpose of complying with Nasdaq listing rules and with the option for the board to abandon the amendment. The proposal passed with 26,667,027 votes for, 9,224,242 against, and 77,216 abstentions, with no broker non-votes. Stockholders also approved the option to adjourn the special meeting if needed, with 27,887,899 votes for, 7,865,883 against, and 214,703 abstentions. The board set the 2026 annual meeting of stockholders for June 8, 2026, with an April 13, 2026 record date, and established March 14, 2026 as the deadline for stockholder proposals and director nominations for inclusion or consideration under SEC Rule 14a-8 and the company’s bylaws.
ClearSign Technologies Corp CEO Colin James Deller reported a stock-based compensation grant and related tax withholding. He received 210,043 shares of common stock on February 26, 2026 as a one-time bonus for services as an executive officer for the year ended December 31, 2025, with the number of shares based on the closing price of $0.5616 per share. To cover his tax liability on this award, 105,022 shares were withheld at the same closing price, recorded as a tax-withholding disposition rather than an open-market sale. Following these transactions, Deller directly owned 276,874 common shares.
ClearSign Technologies Corp Chief Financial Officer Brent Hinds reported equity compensation awards and related tax withholding. On February 26, 2026, he was granted 56,645 shares of common stock as a one-time bonus for services in 2025, valued using the closing price of $0.5616 per share. He also received 47,009 restricted stock units, each representing one share of common stock or its cash equivalent. To cover tax liabilities from the stock issuance, 20,761 common shares were withheld at the same $0.5616 price, leaving him with 170,824 common shares held directly after these transactions.