ClearSign Technologies Corp
Business
ClearSign Technologies designs and develops combustion technologies for decarbonization and improved performance of industrial and commercial combustion systems. Products include ClearSign Core™ burners for process heaters, boilers, and flares, plus ClearSign Eye™ flame sensors, targeting refining, petrochemical, energy infrastructure, and industrial boiler markets. The company operates primarily in the United States through an asset-light model using OEM partnerships and subcontractors.
Summary from 10-K filed 2026-03-31
Financials
Consolidated Statement of Income
| Concept | Trend | FY 2025 2025-12-31 | FY 2024 2024-12-31 | FY 2023 2023-12-31 | FY 2022 2022-12-31 | FY 2021 2021-12-31 |
|---|---|---|---|---|---|---|
| Revenues | 5 | 4 | 2 | 374,000 | 607,000 | |
| Cost of goods sold | 4 | 2 | 2 | 258,000 | 1 | |
| Gross profit | 1 | 1 | 817,000 | 116,000 | −452,000 | |
| Research and development | 1 | 1 | 739,000 | 505,000 | 3 | |
| General and administrative | 7 | 6 | 6 | 6 | 5 | |
| Total operating expenses | 8 | 8 | 7 | 6 | 8 | |
| Loss from operations | −7 | −6 | −6 | −6 | −8 | |
| Interest income | 439,000 | 516,000 | 324,000 | — | — | |
| Government assistance | 736,000 | 664,000 | 255,000 | — | — | |
| Other income, net | — | 9,000 | 208,000 | 6,000 | 1,000 | |
| Total other income, net | 1 | 1 | 787,000 | 359,000 | 253,000 | |
| Net loss | −5 | −5 | −5 | −6 | −8 | |
| Net loss per share - basic (in dollar per share) | −0.99 | −1.08 | −0.13 | −0.16 | −0.25 | |
| Net loss per share - fully diluted (in dollar per share) | −0.99 | −1.08 | −0.13 | −0.16 | −0.25 | |
| Weighted average number of shares outstanding - basic (in shares) | 6 | 5 | 39 | 35 | 31 | |
| Weighted average number of shares outstanding - fully diluted (in shares) | 6 | 5 | 39 | 35 | 31 | |
| Net loss | −5 | −5 | −5 | −6 | −8 | |
| Foreign-exchange translation adjustments | 1,000 | −4,000 | −9,000 | −17,000 | 9,000 | |
| Comprehensive loss | −5 | −5 | −5 | −6 | −8 |
Consolidated Balance Sheet
| Concept | Trend | FY 2025 2025-12-31 | FY 2024 2024-12-31 | FY 2023 2023-12-31 | FY 2022 2022-12-31 | FY 2021 2021-12-31 |
|---|---|---|---|---|---|---|
| Cash and cash equivalents | 9 | 14 | 6 | 6 | 8 | |
| Accounts receivable | 1 | 165,000 | 287,000 | 79,000 | 33,000 | |
| Deferred costs | 329,000 | 562,000 | 922,000 | — | — | |
| Prepaid expenses and other assets | 359,000 | 454,000 | 350,000 | 577,000 | 345,000 | |
| Total current assets | 11 | 15 | 7 | 10 | 8 | |
| Fixed assets, net | 195,000 | 238,000 | 275,000 | 384,000 | 530,000 | |
| Patents and other intangible assets, net | 760,000 | 830,000 | 836,000 | 798,000 | 799,000 | |
| Total Assets | 12 | 16 | 8 | 11 | 9 | |
| Accounts payable and accrued liabilities | 2 | 1 | 366,000 | 296,000 | 224,000 | |
| Current portion of lease liabilities | 96,000 | 75,000 | 71,000 | 133,000 | 205,000 | |
| Accrued compensation and related taxes | 564,000 | 671,000 | 703,000 | 471,000 | 218,000 | |
| Contract liabilities | 100,000 | 441,000 | 1 | 247,000 | 84,000 | |
| Other current liabilities | 180,000 | — | — | — | — | |
| Total current liabilities | 3 | 2 | 2 | 1 | 731,000 | |
| Long term lease liabilities | 67,000 | 113,000 | 172,000 | 226,000 | 350,000 | |
| Total liabilities | 3 | 3 | 2 | 1 | 1 | |
| Preferred stock, $0.0001 par value, 2,000,000 shares authorized, no shares issued or outstanding | — | — | — | — | — | |
| Common stock, $0.0001 par value, 87,500,000 shares authorized, 5,328,730 and 5,028,585 shares issued and outstanding at December 31, 2025 and 2024, respectively.* | 1,000 | 1,000 | 4,000 | 4,000 | 3,000 | |
| Additional paid-in capital | 114 | 113 | 99 | 98 | 91 | |
| Accumulated other comprehensive loss | −20,000 | −21,000 | −17,000 | −8,000 | 9,000 | |
| Accumulated deficit | −105 | −99 | −94 | −89 | −83 | |
| Total stockholders' equity | 10 | 14 | 5 | 10 | 8 | |
| Total Liabilities and Stockholders' Equity | 12 | 16 | 8 | 11 | 9 |
Consolidated Statement of Cash Flows
| Concept | Trend | FY 2025 2025-12-31 | FY 2024 2024-12-31 | FY 2023 2023-12-31 | FY 2022 2022-12-31 | FY 2021 2021-12-31 |
|---|---|---|---|---|---|---|
| Common stock issued for services | 65,000 | 29,000 | 10,000 | 26,000 | 33,000 | |
| Share-based compensation, net of tax withholdings | 893,000 | 528,000 | 614,000 | 373,000 | 680,000 | |
| Depreciation and amortization | 189,000 | 186,000 | 299,000 | 161,000 | — | |
| Impairment of intangible assets | 3,000 | 20,000 | 14,000 | — | — | |
| Right-of-use asset amortization | 88,000 | 86,000 | 125,000 | 131,000 | 188,000 | |
| Lease amendments | — | −3,000 | −14,000 | — | — | |
| Deferred costs | 233,000 | 360,000 | — | — | — | |
| Accounts receivable | −1 | 122,000 | −208,000 | −46,000 | −33,000 | |
| Prepaid expenses and other assets | 95,000 | −104,000 | 18,000 | −232,000 | 121,000 | |
| Accounts payable, accrued liabilities, and lease liabilities | 378,000 | 816,000 | −57,000 | −125,000 | −393,000 | |
| Other current liabilities | 180,000 | — | — | — | — | |
| Accrued compensation and related taxes | 172,000 | 294,000 | 452,000 | 360,000 | — | |
| Contract liabilities | −341,000 | −1 | 869,000 | 163,000 | −10,000 | |
| Net cash used in operating activities | −5 | −4 | −3 | −5 | −7 | |
| Acquisition of fixed assets | −4,000 | −39,000 | — | −10,000 | −73,000 | |
| Disbursements for patents and other intangible assets | −97,000 | −179,000 | −200,000 | −154,000 | −140,000 | |
| Net cash used in investing activities | −101,000 | −218,000 | 2 | −3 | −213,000 | |
| Proceeds from issuance of common stock, net of offering costs | 0 | 13 | 0 | 7 | 5 | |
| Proceeds from exercise of warrants | 24,000 | 25,000 | — | — | — | |
| Taxes paid related to employee stock awards | −45,000 | −46,000 | −15,000 | — | — | |
| Net cash provided by (used in) financing activities | −21,000 | 13 | −15,000 | 7 | 6 | |
| Effect of exchange rate changes on cash and cash equivalents | 1,000 | −4,000 | −9,000 | −17,000 | 9,000 | |
| Net change in cash and cash equivalents | −5 | 8 | −767,000 | −1 | −1 | |
| Officer and employee equity awards for prior year accrued compensation | 279,000 | 326,000 | 234,000 | 107,000 | 217,000 | |
| Non-cash impact of new lease | 68,000 | 32,000 | 34,000 | — | — |
Filings
Material Events
Insiders
Institutional Holders
Frequently asked questions
What is ClearSign Technologies Corp's CIK number?
ClearSign Technologies Corp's SEC CIK number is 0001434524 (1434524). The CIK (Central Index Key) is the permanent identifier the SEC assigns to every EDGAR filer — unlike a ticker symbol, it never changes.
Where can I find ClearSign Technologies Corp's SEC filings?
All of ClearSign Technologies Corp's EDGAR filings — 10-K annual reports, 10-Q quarterly reports, 8-K material events, and insider transactions — are listed on this page, sourced live from SEC EDGAR.
When did ClearSign Technologies Corp last report earnings?
ClearSign Technologies Corp (CLIR) most recently filed an earnings 8-K with the SEC on May 21, 2026, furnishing its results under Item 2.02 (Results of Operations and Financial Condition). The earnings press release is attached to that filing (accession 0001104659-26-065175). This is ClearSign Technologies Corp's most recent earnings filing of record — not a forecast of its next earnings date.
What is ClearSign Technologies Corp's most recent earnings 8-K?
ClearSign Technologies Corp's latest earnings 8-K (Item 2.02) was filed May 21, 2026 under accession 0001104659-26-065175. It carries the quarterly or annual earnings press release — the earliest official, SEC-filed version of the results.
View ClearSign Technologies Corp's latest earnings 8-K →
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