ClearSign Technologies Stock Price History
NASDAQ: CLIRIndustrialsIndustrial Machinery/ComponentsUSD
3.21+0.07 (+2.23%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
CLIR price history at a glance
The price history for ClearSign Technologies (CLIR) on this page begins on April 23, 2012, when the stock closed at $42.80; it most recently closed at $3.21 on October 5, 2026. The highest price in this record is $138.70, reached on January 13, 2014; the latest close is 97.7% below that peak. Across the 13 complete calendar years in the table, CLIR finished higher in 5 and lower in 8. Its best year was 2020 (+261.7%) and its worst was 2018 (-66.9%).
Over roughly 14 years the share price changed -92.5%, a -16.4% compound annual price return (excluding dividends). In the last 12 months alone, CLIR has lost 62.7%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2012
- $138.70
- Date of high
- Jan 13, 2014
- Low since 2012
- $3.11
- Date of low
- Oct 5, 2026
- 52-week high
- $10.20
- 52-week low
- $3.11
- IPO year
- 2012
- Last close
- $3.21
CLIR returns
1 week
-8.55%
1 month
-23.93%
3 months
-13.71%
6 months
-39.32%
Year to date
-42.68%
1 year
-62.67%
3 years
-69.43%
5 years
-82.83%
CLIR price return, excluding dividends.
CLIR annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 3.21 | -43.68% |
| 2025 | 5.70 | -58.39% |
| 2024 | 13.70 | +23.42% |
| 2023 | 11.10 | +105.56% |
| 2022 | 5.40 | -60.87% |
| 2021 | 13.80 | -52.90% |
| 2020 | 29.30 | +261.73% |
| 2019 | 8.10 | -31.93% |
| 2018 | 11.90 | -66.94% |
| 2017 | 36.00 | +5.88% |
| 2016 | 34.00 | -29.90% |
| 2015 | 48.50 | -33.01% |
| 2014 | 72.40 | -26.72% |
| 2013 | 98.80 | +104.98% |
| 2012* | 48.20 | +12.62% |
* Partial year: the record begins after the start of 2012; return measured from the first available close.
2026 return is year to date.
CLIR daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 3.22 | 3.32 | 3.15 | 3.21 | +3.22% | |
| 3.27 | 3.43 | 3.11 | 3.11 | -5.76% | |
| 3.24 | 3.39 | 3.24 | 3.30 | 0.00% | |
| 3.30 | 3.77 | 3.29 | 3.30 | 0.00% | |
| 3.53 | 3.74 | 3.30 | 3.30 | -5.98% | |
| 3.57 | 3.64 | 3.41 | 3.51 | -1.13% | |
| 3.33 | 3.76 | 3.26 | 3.55 | 0.00% | |
| 3.76 | 3.86 | 3.55 | 3.55 | -4.83% | |
| 3.65 | 3.90 | 3.65 | 3.73 | +2.19% | |
| 3.50 | 3.71 | 3.29 | 3.65 | +5.80% | |
| 3.59 | 3.60 | 3.38 | 3.45 | -0.29% | |
| 3.52 | 3.73 | 3.41 | 3.46 | -2.26% | |
| 3.76 | 4.01 | 3.47 | 3.54 | -5.60% | |
| 3.77 | 3.96 | 3.75 | 3.75 | -1.06% | |
| 3.85 | 4.05 | 3.79 | 3.79 | -1.56% | |
| 3.71 | 3.90 | 3.71 | 3.85 | +6.65% | |
| 3.60 | 3.75 | 3.60 | 3.61 | +2.56% | |
| 3.88 | 3.98 | 3.50 | 3.52 | -12.87% | |
| 3.80 | 4.18 | 3.79 | 4.04 | +4.94% | |
| 3.97 | 4.27 | 3.80 | 3.85 | -4.47% | |
| 4.09 | 4.18 | 3.74 | 4.03 | -0.25% | |
| 4.15 | 4.28 | 3.90 | 4.04 | -4.27% | |
| 4.41 | 4.41 | 4.22 | 4.22 | -2.09% | |
| 4.00 | 4.72 | 4.00 | 4.31 | +10.23% | |
| 3.98 | 4.15 | 3.90 | 3.91 | -4.63% | |
| 4.27 | 4.32 | 3.95 | 4.10 | -3.53% | |
| 4.22 | 4.45 | 4.10 | 4.25 | +2.41% | |
| 4.20 | 4.20 | 4.15 | 4.15 | -2.58% | |
| 4.35 | 4.36 | 4.22 | 4.26 | -4.70% | |
| 4.58 | 4.75 | 4.47 | 4.47 | -1.32% | |
| 4.70 | 4.81 | 4.50 | 4.53 | -2.79% | |
| 4.67 | 4.80 | 4.57 | 4.66 | -0.85% | |
| 4.88 | 4.94 | 4.61 | 4.70 | -2.89% | |
| 4.43 | 4.89 | 4.35 | 4.84 | +8.04% | |
| 4.20 | 4.56 | 4.09 | 4.48 | -4.48% | |
| 4.53 | 4.96 | 3.86 | 4.69 | +6.59% | |
| 4.71 | 4.77 | 4.29 | 4.40 | -5.78% | |
| 4.69 | 4.85 | 4.40 | 4.67 | +2.41% | |
| 4.67 | 5.00 | 4.31 | 4.56 | -1.94% | |
| 4.10 | 4.70 | 4.10 | 4.65 | +9.41% | |
| 4.11 | 4.25 | 4.11 | 4.25 | +2.91% | |
| 4.06 | 4.20 | 4.06 | 4.13 | -0.96% | |
| 3.95 | 4.17 | 3.86 | 4.17 | +6.65% | |
| 3.81 | 3.95 | 3.66 | 3.91 | +4.27% | |
| 3.79 | 3.79 | 3.75 | 3.75 | -2.34% | |
| 3.88 | 3.91 | 3.73 | 3.84 | -1.29% | |
| 3.98 | 4.11 | 3.83 | 3.89 | -2.75% | |
| 3.96 | 4.03 | 3.96 | 4.00 | +1.01% | |
| 3.87 | 4.33 | 3.86 | 3.96 | +2.59% | |
| 3.88 | 3.96 | 3.85 | 3.86 | -1.03% | |
| 3.80 | 3.97 | 3.80 | 3.90 | -2.99% | |
| 3.91 | 4.04 | 3.85 | 4.02 | -0.50% | |
| 3.89 | 4.04 | 3.80 | 4.04 | +1.51% | |
| 3.74 | 4.00 | 3.74 | 3.98 | +14.04% | |
| 3.34 | 3.49 | 3.34 | 3.49 | +4.18% | |
| 3.20 | 3.72 | 3.20 | 3.35 | +3.08% | |
| 3.35 | 3.40 | 3.16 | 3.25 | -2.99% | |
| 3.40 | 3.43 | 3.35 | 3.35 | -0.59% | |
| 3.55 | 3.55 | 3.32 | 3.37 | -6.91% | |
| 3.65 | 3.66 | 3.52 | 3.62 | -0.55% | |
| 3.64 | 3.69 | 3.64 | 3.64 | -2.15% | |
| 3.60 | 3.72 | 3.60 | 3.72 | +0.27% | |
| 3.68 | 3.87 | 3.68 | 3.71 | +2.49% | |
| 3.71 | 3.79 | 3.61 | 3.62 | -2.69% | |
| 3.75 | 3.75 | 3.66 | 3.72 | -0.80% | |
| 3.72 | 3.80 | 3.70 | 3.75 | +1.35% | |
| 3.91 | 3.91 | 3.61 | 3.70 | -3.65% | |
| 4.08 | 4.14 | 3.82 | 3.84 | -6.34% | |
| 4.03 | 4.10 | 3.95 | 4.10 | +0.99% | |
| 4.08 | 4.24 | 4.06 | 4.06 | -1.46% | |
| 3.79 | 4.27 | 3.76 | 4.12 | +12.26% | |
| 3.61 | 3.88 | 3.58 | 3.67 | +0.82% | |
| 3.55 | 3.69 | 3.50 | 3.64 | +0.55% | |
| 3.40 | 3.70 | 3.39 | 3.62 | +6.78% | |
| 3.54 | 3.63 | 3.39 | 3.39 | -3.69% | |
| 3.69 | 3.86 | 3.52 | 3.52 | -5.12% | |
| 3.67 | 3.77 | 3.59 | 3.71 | -0.27% | |
| 3.89 | 3.94 | 3.62 | 3.72 | -1.85% | |
| 4.10 | 4.10 | 3.71 | 3.79 | -6.42% | |
| 4.14 | 4.14 | 4.02 | 4.05 | -1.70% | |
| 4.33 | 4.33 | 4.07 | 4.12 | -0.48% | |
| 4.28 | 4.28 | 4.08 | 4.14 | +1.47% | |
| 4.18 | 4.29 | 4.08 | 4.08 | -2.16% | |
| 4.32 | 4.32 | 4.07 | 4.17 | -0.48% | |
| 4.28 | 4.34 | 4.07 | 4.19 | +0.72% | |
| 4.25 | 4.43 | 4.07 | 4.16 | +0.24% | |
| 3.93 | 4.25 | 3.93 | 4.15 | +5.33% | |
| 4.31 | 4.40 | 3.94 | 3.94 | -7.94% | |
| 4.35 | 4.48 | 4.28 | 4.28 | -2.28% | |
| 4.40 | 4.47 | 4.38 | 4.38 | -1.79% | |
| 4.45 | 4.55 | 4.36 | 4.46 | -0.22% | |
| 4.55 | 4.66 | 3.73 | 4.47 | -3.46% | |
| 4.39 | 4.69 | 4.27 | 4.63 | +1.54% | |
| 4.45 | 4.75 | 4.41 | 4.56 | +2.47% | |
| 4.40 | 4.65 | 4.40 | 4.45 | -3.89% | |
| 4.61 | 4.88 | 4.60 | 4.63 | -4.54% | |
| 4.74 | 4.89 | 4.61 | 4.85 | -3.19% | |
| 4.73 | 5.01 | 4.59 | 5.01 | +2.24% | |
| 4.61 | 5.09 | 4.51 | 4.90 | +6.52% | |
| 4.47 | 4.65 | 4.46 | 4.60 | +4.31% | |
| 4.71 | 4.82 | 4.41 | 4.41 | -6.37% | |
| 4.86 | 5.07 | 4.62 | 4.71 | -9.60% | |
| 4.61 | 5.56 | 4.57 | 5.21 | +17.08% | |
| 4.49 | 4.74 | 4.35 | 4.45 | -2.20% | |
| 4.38 | 4.75 | 4.37 | 4.55 | +4.36% | |
| 4.61 | 4.61 | 4.18 | 4.36 | -3.96% | |
| 4.80 | 4.80 | 4.21 | 4.54 | -6.00% | |
| 4.97 | 4.98 | 4.62 | 4.83 | -1.63% | |
| 4.91 | 5.01 | 4.80 | 4.91 | 0.00% | |
| 4.94 | 4.99 | 4.88 | 4.91 | -2.96% | |
| 5.03 | 5.10 | 4.57 | 5.06 | -1.17% | |
| 5.05 | 5.22 | 5.01 | 5.12 | +2.40% | |
| 5.33 | 5.33 | 5.00 | 5.00 | -6.89% | |
| 5.33 | 5.56 | 5.33 | 5.37 | +0.75% | |
| 5.32 | 5.51 | 5.32 | 5.33 | +1.91% | |
| 4.88 | 5.33 | 4.73 | 5.23 | +4.60% | |
| 5.08 | 5.26 | 5.00 | 5.00 | -3.10% | |
| 5.48 | 5.50 | 5.06 | 5.16 | -7.69% | |
| 5.48 | 5.80 | 5.48 | 5.59 | +3.52% | |
| 5.44 | 5.53 | 5.21 | 5.40 | -0.18% | |
| 5.56 | 5.66 | 5.19 | 5.41 | -0.73% | |
| 5.33 | 5.68 | 5.33 | 5.45 | +2.25% | |
| 5.90 | 6.14 | 5.22 | 5.33 | -8.73% | |
| 5.60 | 5.96 | 5.60 | 5.84 | +8.55% | |
| 5.47 | 5.60 | 5.26 | 5.38 | -0.19% | |
| 5.29 | 5.39 | 4.93 | 5.39 | +1.89% | |
| 6.28 | 6.59 | 4.73 | 5.29 | -14.40% | |
| 6.30 | 6.87 | 5.99 | 6.18 | -4.48% | |
| 6.58 | 6.59 | 5.99 | 6.47 | +5.20% | |
| 6.45 | 6.98 | 5.55 | 6.15 | -11.38% | |
| 4.85 | 7.56 | 4.80 | 6.94 | +43.69% | |
| 4.72 | 4.94 | 4.31 | 4.83 | +2.55% | |
| 4.39 | 4.71 | 4.35 | 4.71 | +8.03% | |
| 3.69 | 4.46 | 3.69 | 4.36 | +13.25% | |
| 3.78 | 4.04 | 3.60 | 3.85 | +2.94% | |
| 3.71 | 3.76 | 3.24 | 3.74 | +0.54% | |
| 3.50 | 4.06 | 3.50 | 3.72 | +4.20% | |
| 3.65 | 3.73 | 3.57 | 3.57 | +1.13% | |
| 3.53 | 3.71 | 3.53 | 3.53 | -1.94% | |
| 3.78 | 3.84 | 3.52 | 3.60 | +4.05% | |
| 3.63 | 3.96 | 3.37 | 3.46 | -4.16% | |
| 3.66 | 3.83 | 3.56 | 3.61 | -3.22% | |
| 4.00 | 4.03 | 3.67 | 3.73 | -7.67% | |
| 4.26 | 4.34 | 4.01 | 4.04 | -7.34% | |
| 4.62 | 4.75 | 4.26 | 4.36 | +1.40% | |
| 4.20 | 4.40 | 3.90 | 4.30 | -2.27% | |
| 4.80 | 5.00 | 4.40 | 4.40 | -2.22% | |
| 5.10 | 5.10 | 4.40 | 4.50 | -21.05% | |
| 5.40 | 6.40 | 5.40 | 5.70 | +5.56% | |
| 5.60 | 5.60 | 5.20 | 5.40 | 0.00% | |
| 5.20 | 5.80 | 5.20 | 5.40 | +3.85% | |
| 5.20 | 5.40 | 5.20 | 5.20 | -3.70% | |
| 5.50 | 5.50 | 5.10 | 5.40 | -1.82% | |
| 5.40 | 5.60 | 5.40 | 5.50 | -1.79% | |
| 5.70 | 5.80 | 5.60 | 5.60 | 0.00% | |
| 5.40 | 5.70 | 5.40 | 5.60 | 0.00% | |
| 5.50 | 5.80 | 5.50 | 5.60 | -3.45% | |
| 5.70 | 5.90 | 5.60 | 5.80 | -1.69% | |
| 6.00 | 6.10 | 5.50 | 5.90 | 0.00% | |
| 5.90 | 6.00 | 5.80 | 5.90 | 0.00% | |
| 6.20 | 6.40 | 5.90 | 5.90 | -4.84% | |
| 6.20 | 6.40 | 6.10 | 6.20 | +1.64% | |
| 6.20 | 6.50 | 6.00 | 6.10 | -3.17% | |
| 6.10 | 6.30 | 5.90 | 6.30 | +3.28% | |
| 6.00 | 6.30 | 5.90 | 6.10 | 0.00% | |
| 5.90 | 6.10 | 5.60 | 6.10 | +5.17% | |
| 6.10 | 6.30 | 5.80 | 5.80 | -4.92% | |
| 6.50 | 6.50 | 6.10 | 6.10 | -7.58% | |
| 6.20 | 7.00 | 5.90 | 6.60 | +13.79% | |
| 5.80 | 5.90 | 5.50 | 5.80 | +1.75% | |
| 5.70 | 5.90 | 5.60 | 5.70 | -3.39% | |
| 6.00 | 6.10 | 5.70 | 5.90 | -3.28% | |
| 5.70 | 6.20 | 5.60 | 6.10 | +1.67% | |
| 5.90 | 6.50 | 5.40 | 6.00 | 0.00% | |
| 6.10 | 6.50 | 6.00 | 6.00 | 0.00% | |
| 6.40 | 6.50 | 5.80 | 6.00 | -3.23% | |
| 6.50 | 6.90 | 6.10 | 6.20 | -7.46% | |
| 6.90 | 7.20 | 6.70 | 6.70 | -4.29% | |
| 7.20 | 7.20 | 7.00 | 7.00 | 0.00% | |
| 7.20 | 7.50 | 7.00 | 7.00 | -2.78% | |
| 6.80 | 7.50 | 6.70 | 7.20 | +5.88% | |
| 7.50 | 7.70 | 6.30 | 6.80 | -9.33% | |
| 7.80 | 7.90 | 7.50 | 7.50 | -1.32% | |
| 7.90 | 8.10 | 7.60 | 7.60 | -3.80% | |
| 7.50 | 8.10 | 7.50 | 7.90 | +5.33% | |
| 7.70 | 7.80 | 7.50 | 7.50 | -2.60% | |
| 7.30 | 7.70 | 7.00 | 7.70 | +4.05% | |
| 7.80 | 7.80 | 7.00 | 7.40 | -5.13% | |
| 7.70 | 8.10 | 7.40 | 7.80 | +6.85% | |
| 7.70 | 7.90 | 6.90 | 7.30 | -5.19% | |
| 6.50 | 7.90 | 6.00 | 7.70 | +28.33% | |
| 6.90 | 6.90 | 5.80 | 6.00 | -6.25% | |
| 6.00 | 6.90 | 5.80 | 6.40 | +12.28% | |
| 5.60 | 5.90 | 5.50 | 5.70 | +1.79% | |
| 5.60 | 5.70 | 5.50 | 5.60 | 0.00% | |
| 5.50 | 5.80 | 5.50 | 5.60 | -3.45% | |
| 5.90 | 6.00 | 5.60 | 5.80 | -4.92% | |
| 6.10 | 6.50 | 6.00 | 6.10 | -3.17% | |
| 6.00 | 6.30 | 5.90 | 6.30 | +5.00% | |
| 5.60 | 6.00 | 5.60 | 6.00 | +3.45% | |
| 5.70 | 6.00 | 5.70 | 5.80 | +1.75% | |
| 6.10 | 6.30 | 5.50 | 5.70 | -3.39% | |
| 6.40 | 6.70 | 5.80 | 5.90 | +7.27% | |
| 5.80 | 5.90 | 5.50 | 5.50 | -6.78% | |
| 5.80 | 6.30 | 5.80 | 5.90 | +1.72% | |
| 6.40 | 6.60 | 5.80 | 5.80 | -12.12% | |
| 7.00 | 7.40 | 6.50 | 6.60 | +8.20% | |
| 6.80 | 6.80 | 5.80 | 6.10 | -10.29% | |
| 7.50 | 7.80 | 6.80 | 6.80 | -9.33% | |
| 7.70 | 7.80 | 7.50 | 7.50 | 0.00% | |
| 7.50 | 7.80 | 7.40 | 7.50 | -2.60% | |
| 7.70 | 7.70 | 7.50 | 7.70 | +1.32% | |
| 7.70 | 7.80 | 7.50 | 7.60 | -1.30% | |
| 7.20 | 8.00 | 7.20 | 7.70 | +6.94% | |
| 7.00 | 7.20 | 7.00 | 7.20 | 0.00% | |
| 7.30 | 7.40 | 6.70 | 7.20 | -2.70% | |
| 7.40 | 7.50 | 7.40 | 7.40 | 0.00% | |
| 7.50 | 7.50 | 7.30 | 7.40 | -1.33% | |
| 7.70 | 7.80 | 6.80 | 7.50 | -3.85% | |
| 8.20 | 8.20 | 7.50 | 7.80 | -3.70% | |
| 8.40 | 8.50 | 7.90 | 8.10 | -1.22% | |
| 8.70 | 8.70 | 8.20 | 8.20 | -4.65% | |
| 8.00 | 8.70 | 8.00 | 8.60 | +3.61% | |
| 8.40 | 8.40 | 7.90 | 8.30 | 0.00% | |
| 8.60 | 8.80 | 7.90 | 8.30 | -5.68% | |
| 8.60 | 9.80 | 7.80 | 8.80 | +1.15% | |
| 8.30 | 9.70 | 7.50 | 8.70 | +4.82% | |
| 8.50 | 8.90 | 8.30 | 8.30 | -3.49% | |
| 9.50 | 9.50 | 8.50 | 8.60 | -7.53% | |
| 9.50 | 9.60 | 9.10 | 9.30 | 0.00% | |
| 9.20 | 9.30 | 9.00 | 9.30 | +3.33% | |
| 9.30 | 9.40 | 8.80 | 9.00 | -2.17% | |
| 8.50 | 9.60 | 8.40 | 9.20 | +6.98% | |
| 8.80 | 9.10 | 8.40 | 8.60 | +1.18% | |
| 8.90 | 8.90 | 8.30 | 8.50 | -2.30% | |
| 9.00 | 9.20 | 8.50 | 8.70 | -1.14% | |
| 9.00 | 9.40 | 8.60 | 8.80 | -2.22% | |
| 9.10 | 9.20 | 9.00 | 9.00 | -1.10% | |
| 8.70 | 10.20 | 8.70 | 9.10 | +8.33% | |
| 8.80 | 8.90 | 8.10 | 8.40 | -5.62% | |
| 9.50 | 9.50 | 8.60 | 8.90 | -6.32% | |
| 8.70 | 9.70 | 8.50 | 9.50 | +14.46% | |
| 8.50 | 8.50 | 7.70 | 8.30 | -3.49% | |
| 9.10 | 9.70 | 8.30 | 8.60 | -9.47% | |
| 8.40 | 9.80 | 8.40 | 9.50 | +11.76% | |
| 8.10 | 9.00 | 8.10 | 8.50 | -2.30% | |
| 10.20 | 10.20 | 8.50 | 8.70 | -10.31% | |
| 9.10 | 10.00 | 9.10 | 9.70 | -3.00% | |
| 8.60 | 10.10 | 8.30 | 10.00 | +8.70% | |
| 8.80 | 9.30 | 8.10 | 9.20 | +6.98% | |
| 9.20 | 9.20 | 8.10 | 8.60 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the CLIR chart for longer ranges.