ClearSign Technologies Corporation
CLIR Industrials Pollution & Treatment Controls
ClearSign Technologies Corporation’s revenue for fiscal 2025 (year ended December 2025) was $5.2 million, up 45.6% from fiscal 2024. In the quarter to June 2026, revenue grew 321.1%, EPS grew 26.7% and free cash flow fell 137.5%, each against the same quarter a year earlier. Revenue growth for three consecutive years; insiders bought in the last twelve months.
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ClearSign Technologies Corporation (CLIR) P/E ratio
ClearSign Technologies Corporation has no meaningful P/E ratio: its trailing twelve-month earnings is negative. Over the past ten years it has ranged from 0.0× (October 2026) to 0.0× (October 2026) — the current reading is the highest in ten years.
P/E ratio, daily
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Annual newest first
| Period | P/E ratio | Change |
|---|---|---|
| FY2025 | 0.0× | — |
| FY2024 | 0.0× | — |
| FY2023 | 0.0× | — |
| FY2022 | 0.0× | — |
| FY2021 | 0.0× | — |
| FY2018 | 0.0× | — |
| FY2017 | 0.0× | — |
| FY2016 | 0.0× | — |
| FY2015 | 0.0× | — |
Quarterly newest first
| Period | P/E ratio | Change |
|---|---|---|
| Jun 2026 | 0.0× | — |
| Mar 2026 | 0.0× | — |
| Dec 2025 | 0.0× | — |
| Sep 2025 | 0.0× | — |
| 20 more quarters | Free account |
Against its own ten years
P/E ratio against peers
| Company | P/E ratio |
|---|---|
| BCHT Birchtech Corp. compare | n/m |
| DEVSF DevvStream Corp. compare | n/m |
| TOMZ TOMI Environmental Solutions, Inc. compare | n/m |
| CLIR ClearSign Technologies Corporation | n/m |
| FTEK Fuel Tech, Inc. compare | n/m |
| SCWO 374Water Inc. compare | n/m |
| LIQT LiqTech International, Inc. compare | n/m |
| RAIN Rain Enhancement Technologies Holdco, Inc. compare | n/m |
| CLWT Euro Tech Holdings Company Limited compare | 18.1× |
| Industrials sector median | 24.7× |
| Market median | 18.1× |
What P/E ratio is
Price to Earnings Ratio shows how much investors pay for each dollar of a company’s annual profit per share.
Stock Price ÷ EPS (Basic) (TTM)