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 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
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.
ClearSign Technologies shared preliminary, unaudited results showing record Q4 2025 revenue of approximately $3.6 million and full-year 2025 revenue of about $5.2 million, up roughly 44% from 2024’s $3.6 million. Management highlighted a three-year compound annual revenue growth rate near 141%, albeit from a small base.
The quarter was driven mainly by a 26-burner order for a Gulf Coast petrochemical customer, with additional contributions from flare systems, midstream M‑Series burners and engineering services. As of December 31, 2025, cash stood near $9 million, implying an average quarterly cash burn of about $1.25 million over 2025. The company described a growing pipeline of 200–300 potential process burners, around 50 active M‑Series proposals estimated near $10 million in sales value, and rising demand for higher-value enclosed flare systems and aftermarket parts.
ClearSign Technologies Corp’s Chief Financial Officer Brent Hinds reported equity compensation activity involving restricted stock units (RSUs) and related tax withholding. On February 20, 2026, 9,315 RSUs from a 27,946-unit grant awarded on February 20, 2025 vested into the same number of common shares without cash payment under the 2021 Equity Incentive Plan, with 3,413 shares withheld to cover tax liabilities at a price of
On February 22, 2026, 7,547 RSUs from a 22,641-unit grant dated February 22, 2024 likewise vested into common shares with no consideration, and 2,765 shares were withheld to pay taxes, also based on a
ClearSign Technologies Corp. Chief Financial Officer Brent Hinds reported routine equity compensation activity. On February 2, 2026, 10,127 restricted stock units (RSUs) granted on February 2, 2023 vested into the same number of shares of common stock at no cost under the 2021 Equity Incentive Plan.
To cover tax obligations from this vesting, 3,711 shares of common stock were withheld at a price of $0.5991 per share, based on the Nasdaq closing price that day. After these transactions, Hinds directly owned 124,256 shares of ClearSign common stock. The original 30,380 RSUs vest in three equal annual installments that began on February 2, 2024.
ClearSign Technologies Corporation has called a virtual special stockholder meeting for February 26, 2026 to vote on a reverse stock split and a potential adjournment of the meeting. The proposed reverse split would combine between 2 and 10 existing shares of common stock into 1 new share at a ratio later chosen by the board.
The company currently has 53,615,991 common shares outstanding as of January 22, 2026, out of 87,500,000 authorized. The main goal is to lift the share price to meet Nasdaq’s $1.00 minimum bid requirement and reduce delisting risk, while keeping authorized share counts unchanged, which would increase the pool of unissued shares after the split.
ClearSign Technologies is asking stockholders to approve a reverse stock split and a related adjournment authority at a virtual special meeting on February 26, 2026. The board could combine every 2 to 10 existing shares of common stock into one share, at a ratio it later selects, without changing the total authorized shares or par value.
The main goal is to lift the share price to satisfy Nasdaq’s $1.00 minimum bid requirement and maintain the current listing. As of January 22, 2026, ClearSign had 53,615,991 common shares outstanding, with 87,500,000 authorized. The proxy explains potential benefits (improved marketability and institutional interest) and risks, including possible reduced liquidity, lower market capitalization, and no assurance of regaining or maintaining Nasdaq compliance.
ClearSign Technologies Corporation furnished an update with preliminary, unaudited financial information for the fourth quarter and full fiscal year ended December 31, 2025. The company disclosed this information through a press release dated January 7, 2026. Management prepared the preliminary data, and the independent registered public accounting firm, BPM CPA LLP, has not audited, reviewed, compiled, or performed any procedures on these figures and therefore provides no assurance on them.
The disclosure is being made under Items 2.02 and 7.01 and is expressly designated as “furnished” rather than “filed,” meaning it is not subject to certain liability provisions of the Exchange Act and will only be incorporated into other securities filings if specifically referenced. The press release is included as Exhibit 99.1 to the report.