ClearSign Technologies Corporation Common Stock (DE) (CLIR)

FairStock Score: 57/100 — STEADY

Key Financials

AI Analysis

AI-generated, general educational analysis — not personal investment advice.

I look for durable economics, honest accounting, and a margin of safety. ClearSign is a 16-employee industrial technology company with promising-sounding burner technology, but the filed numbers show a business still searching for commercial traction. In fiscal 2025 (the year ended 2025-12-31), revenue was $5.2 million and net income was -$5.5 million; in fiscal 2024 (the year ended 2024-12-31), revenue was $3.6 million and net income was -$5.3 million; in fiscal 2023 (the year ended 2023-12-31), revenue was $2.4 million and net income was -$5.2 million. In fiscal Q2 2026 (the quarter ended 2026-06-30), revenue was $560,000, net income was -$1.3 million, and diluted EPS was -$0.22. That is not earning power; it is a cash-consuming enterprise. Trailing free cash flow was -$5.8 million, and the FairStock FCF yield was -37.2%. The balance sheet is not leveraged—D/E is 0.01—but the FairStock Altman Z-score of -7.85 and ROE of -51.73% highlight how thin the financial foundation is. At the $2.30 close on 2026-10-26, FairStock shows P/B of 1.47 and P/E of -230.00; book value is not much of a safety net when losses persist. The Piotroski F-score of 6/9 is respectable, but the computed Lynch category is none because the company has lost money in each of the last four years. Without evidence of a durable moat, repeat commercial demand, and a credible path to positive cash flow, the price is not a Graham bargain; it is an option on future execution.

In plain English: ClearSign Technologies makes burner and pollution-control technology for industrial systems. The business looks weak: it has lost money in each of the last four years, revenue is small and uneven, and it spends more cash than it brings in. At $2.30 a share and a market value of about $15.7 million, the price does not look cheap; it looks speculative.

The full AI analysis, bull and bear case and key monitorables are in FairStock Pro.

Data as of 2026-10-26 close · note generated 2026-10-28 · model deepseek-flash

Sources (SEC EDGAR): fiscal Q2 2026 10-Q (period ended 2026-06-30) · fiscal Q1 2026 10-Q (period ended 2026-03-31) · fiscal Q4 2025 10-K (period ended 2025-12-31) · fiscal Q3 2025 10-K (period ended 2025-09-30) · FY2025 10-K (period ended 2025-12-31) · FY2024 10-K (period ended 2024-12-31) · FY2023 10-K (period ended 2023-12-31)

Fundamentals from company filings and market-data providers; prices are end-of-day, not real-time. AI-generated analysis is general and educational — not personal investment advice. Scoring methodology · Score test · Disclaimer