ClearSign Technologies Corporation (CLIR)
NASDAQ: CLIR · Real-Time Price · USD
5.36
+0.13 (2.49%)
At close: Apr 28, 2026, 4:00 PM EDT
5.43
+0.07 (1.30%)
After-hours: Apr 28, 2026, 7:30 PM EDT
ClearSign Technologies Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Apr 28, 2026 | 5.32 | 5.51 | 5.32 | 5.33 | 5.33 | 1.91% | 9,438 |
| Apr 27, 2026 | 4.88 | 5.33 | 4.73 | 5.23 | 5.23 | 4.60% | 14,681 |
| Apr 24, 2026 | 5.08 | 5.27 | 5.00 | 5.00 | 5.00 | -3.10% | 5,724 |
| Apr 23, 2026 | 5.48 | 5.50 | 5.06 | 5.16 | 5.16 | -7.69% | 15,246 |
| Apr 22, 2026 | 5.48 | 5.80 | 5.48 | 5.59 | 5.59 | 3.52% | 12,982 |
| Apr 21, 2026 | 5.44 | 5.53 | 5.21 | 5.40 | 5.40 | -0.09% | 11,907 |
| Apr 20, 2026 | 5.56 | 5.66 | 5.19 | 5.41 | 5.41 | -0.83% | 55,957 |
| Apr 17, 2026 | 5.33 | 5.68 | 5.33 | 5.45 | 5.45 | 2.25% | 21,121 |
| Apr 16, 2026 | 5.90 | 6.14 | 5.22 | 5.33 | 5.33 | -8.73% | 17,537 |
| Apr 15, 2026 | 5.60 | 5.96 | 5.60 | 5.84 | 5.84 | 8.55% | 17,542 |
| Apr 14, 2026 | 5.47 | 5.60 | 5.26 | 5.38 | 5.38 | -0.19% | 17,755 |
| Apr 13, 2026 | 5.29 | 5.39 | 4.93 | 5.39 | 5.39 | 1.89% | 47,758 |
| Apr 10, 2026 | 6.28 | 6.59 | 4.73 | 5.29 | 5.29 | -14.40% | 133,132 |
| Apr 9, 2026 | 6.30 | 6.87 | 5.99 | 6.18 | 6.18 | -4.48% | 58,115 |
| Apr 8, 2026 | 6.58 | 6.59 | 5.99 | 6.47 | 6.47 | 5.20% | 40,226 |
| Apr 7, 2026 | 6.45 | 6.98 | 5.55 | 6.15 | 6.15 | -11.38% | 77,114 |
| Apr 6, 2026 | 4.85 | 7.56 | 4.80 | 6.94 | 6.94 | 43.69% | 690,976 |
| Apr 2, 2026 | 4.72 | 4.94 | 4.31 | 4.83 | 4.83 | 2.55% | 8,385 |
| Apr 1, 2026 | 4.39 | 4.71 | 4.35 | 4.71 | 4.71 | 8.03% | 13,644 |
| Mar 31, 2026 | 3.69 | 4.46 | 3.69 | 4.36 | 4.36 | 13.25% | 11,129 |
| Mar 30, 2026 | 3.78 | 4.04 | 3.60 | 3.85 | 3.85 | 2.94% | 43,905 |
| Mar 27, 2026 | 3.71 | 3.76 | 3.24 | 3.74 | 3.74 | 0.54% | 9,762 |
| Mar 26, 2026 | 3.50 | 4.06 | 3.50 | 3.72 | 3.72 | 4.20% | 19,446 |
| Mar 25, 2026 | 3.65 | 3.73 | 3.57 | 3.57 | 3.57 | 1.13% | 7,075 |
| Mar 24, 2026 | 3.53 | 3.71 | 3.53 | 3.53 | 3.53 | -1.94% | 8,046 |
| Mar 23, 2026 | 3.78 | 3.84 | 3.52 | 3.60 | 3.60 | 4.05% | 14,689 |
| Mar 20, 2026 | 3.63 | 3.96 | 3.37 | 3.46 | 3.46 | -4.16% | 33,095 |
| Mar 19, 2026 | 3.66 | 3.83 | 3.56 | 3.61 | 3.61 | -3.22% | 16,519 |
| Mar 18, 2026 | 4.00 | 4.03 | 3.67 | 3.73 | 3.73 | -7.67% | 28,680 |
| Mar 17, 2026 | 4.26 | 4.34 | 4.01 | 4.04 | 4.04 | -7.23% | 25,843 |
| Mar 16, 2026 | 4.62 | 4.75 | 4.26 | 4.36 | 4.36 | 0.62% | 25,043 |
| Mar 13, 2026 | 4.22 | 4.40 | 3.90 | 4.33 | 4.33 | -1.64% | 32,167 |
| Mar 12, 2026 | 4.80 | 5.00 | 4.38 | 4.40 | 4.40 | -1.65% | 32,565 |
| Mar 11, 2026 | 5.05 | 5.10 | 4.39 | 4.47 | 4.47 | -21.65% | 62,155 |
| Mar 10, 2026 | 5.36 | 6.43 | 5.36 | 5.71 | 5.71 | 6.51% | 63,670 |
| Mar 9, 2026 | 5.62 | 5.62 | 5.25 | 5.36 | 5.36 | 0.11% | 6,301 |
| Mar 6, 2026 | 5.20 | 5.80 | 5.20 | 5.36 | 5.36 | 2.78% | 19,349 |
| Mar 5, 2026 | 5.22 | 5.38 | 5.15 | 5.21 | 5.21 | -3.52% | 9,275 |
| Mar 4, 2026 | 5.50 | 5.50 | 5.11 | 5.40 | 5.40 | -1.66% | 18,931 |
| Mar 3, 2026 | 5.40 | 5.60 | 5.40 | 5.49 | 5.49 | -2.24% | 2,527 |
| Mar 2, 2026 | 5.69 | 5.79 | 5.60 | 5.62 | 5.62 | - | 5,860 |
| Feb 27, 2026 | 5.40 | 5.70 | 5.40 | 5.62 | 5.62 | 0.02% | 4,398 |
| Feb 26, 2026 | 5.52 | 5.81 | 5.52 | 5.62 | 5.62 | -3.11% | 6,725 |
| Feb 25, 2026 | 5.74 | 5.89 | 5.60 | 5.80 | 5.80 | -1.34% | 6,785 |
| Feb 24, 2026 | 5.95 | 6.10 | 5.50 | 5.88 | 5.88 | 0.26% | 7,694 |
| Feb 23, 2026 | 5.95 | 6.03 | 5.83 | 5.86 | 5.86 | -1.50% | 4,687 |
| Feb 20, 2026 | 6.24 | 6.39 | 5.92 | 5.95 | 5.95 | -3.28% | 3,723 |
| Feb 19, 2026 | 6.19 | 6.36 | 6.07 | 6.15 | 6.15 | 1.40% | 7,342 |
| Feb 18, 2026 | 6.20 | 6.45 | 5.97 | 6.07 | 6.07 | -3.41% | 4,254 |
| Feb 17, 2026 | 6.10 | 6.28 | 5.93 | 6.28 | 6.28 | 2.28% | 2,223 |
| Feb 13, 2026 | 5.99 | 6.33 | 5.93 | 6.14 | 6.14 | 0.66% | 12,371 |
| Feb 12, 2026 | 5.93 | 6.10 | 5.60 | 6.10 | 6.10 | 4.99% | 8,168 |
| Feb 11, 2026 | 6.11 | 6.27 | 5.80 | 5.81 | 5.81 | -5.27% | 8,435 |
| Feb 10, 2026 | 6.50 | 6.50 | 6.11 | 6.13 | 6.13 | -6.93% | 6,614 |
| Feb 9, 2026 | 6.20 | 7.04 | 5.90 | 6.59 | 6.59 | 13.68% | 24,756 |
| Feb 6, 2026 | 5.80 | 5.91 | 5.50 | 5.80 | 5.80 | 2.06% | 5,429 |
| Feb 5, 2026 | 5.71 | 5.88 | 5.57 | 5.68 | 5.68 | -3.24% | 8,671 |
| Feb 4, 2026 | 5.95 | 6.07 | 5.70 | 5.87 | 5.87 | -4.05% | 8,270 |
| Feb 3, 2026 | 5.75 | 6.21 | 5.63 | 6.12 | 6.12 | 2.12% | 6,859 |
| Feb 2, 2026 | 5.88 | 6.49 | 5.40 | 5.99 | 5.99 | -0.32% | 16,104 |
| Jan 30, 2026 | 6.10 | 6.48 | 6.01 | 6.01 | 6.01 | -0.41% | 130,617 |
| Jan 29, 2026 | 6.40 | 6.48 | 5.82 | 6.04 | 6.04 | -1.89% | 11,863 |
| Jan 28, 2026 | 6.52 | 6.88 | 6.11 | 6.15 | 6.15 | -8.33% | 13,556 |
| Jan 27, 2026 | 6.90 | 7.20 | 6.65 | 6.71 | 6.71 | -4.28% | 14,631 |
| Jan 26, 2026 | 7.20 | 7.20 | 6.96 | 7.01 | 7.01 | 0.72% | 5,392 |
| Jan 23, 2026 | 7.22 | 7.50 | 6.96 | 6.96 | 6.96 | -3.09% | 3,179 |
| Jan 22, 2026 | 6.80 | 7.50 | 6.71 | 7.18 | 7.18 | 5.22% | 23,798 |
| Jan 21, 2026 | 7.50 | 7.75 | 6.32 | 6.83 | 6.83 | -9.01% | 22,653 |
| Jan 20, 2026 | 7.80 | 7.95 | 7.50 | 7.50 | 7.50 | -1.37% | 7,355 |
| Jan 16, 2026 | 7.90 | 8.05 | 7.55 | 7.61 | 7.61 | -3.72% | 9,372 |
| Jan 15, 2026 | 7.52 | 8.05 | 7.52 | 7.90 | 7.90 | 4.91% | 24,911 |
| Jan 14, 2026 | 7.70 | 7.80 | 7.50 | 7.53 | 7.53 | -1.83% | 3,523 |
| Jan 13, 2026 | 7.33 | 7.70 | 7.02 | 7.67 | 7.67 | 2.97% | 10,720 |
| Jan 12, 2026 | 7.80 | 7.80 | 7.00 | 7.45 | 7.45 | -4.01% | 22,537 |
| Jan 9, 2026 | 7.74 | 8.10 | 7.41 | 7.76 | 7.76 | 6.45% | 26,430 |
| Jan 8, 2026 | 7.70 | 7.94 | 6.90 | 7.29 | 7.29 | -5.02% | 12,518 |
| Jan 7, 2026 | 6.50 | 7.95 | 6.02 | 7.68 | 7.68 | 27.85% | 43,763 |
| Jan 6, 2026 | 6.90 | 6.90 | 5.75 | 6.00 | 6.00 | -6.20% | 25,845 |
| Jan 5, 2026 | 6.00 | 6.93 | 5.80 | 6.40 | 6.40 | 12.28% | 18,136 |
| Jan 2, 2026 | 5.60 | 5.87 | 5.50 | 5.70 | 5.70 | 2.50% | 11,204 |
| Dec 31, 2025 | 5.60 | 5.67 | 5.51 | 5.56 | 5.56 | 0.02% | 13,412 |
| Dec 30, 2025 | 5.52 | 5.79 | 5.50 | 5.56 | 5.56 | -3.30% | 8,186 |
| Dec 29, 2025 | 5.90 | 5.99 | 5.60 | 5.75 | 5.75 | -5.55% | 15,811 |
| Dec 26, 2025 | 6.09 | 6.50 | 6.01 | 6.09 | 6.09 | -2.83% | 7,025 |
| Dec 24, 2025 | 5.96 | 6.27 | 5.90 | 6.27 | 6.27 | 3.98% | 2,139 |
| Dec 23, 2025 | 5.63 | 6.03 | 5.63 | 6.03 | 6.03 | 3.88% | 3,319 |
| Dec 22, 2025 | 5.70 | 6.00 | 5.70 | 5.80 | 5.80 | 1.72% | 6,210 |
| Dec 19, 2025 | 6.05 | 6.30 | 5.50 | 5.70 | 5.70 | -3.68% | 17,639 |
| Dec 18, 2025 | 6.40 | 6.70 | 5.80 | 5.92 | 5.92 | 7.30% | 10,945 |
| Dec 17, 2025 | 5.80 | 5.88 | 5.50 | 5.52 | 5.52 | -6.49% | 21,668 |
| Dec 16, 2025 | 5.80 | 6.25 | 5.80 | 5.90 | 5.90 | 1.30% | 5,924 |
| Dec 15, 2025 | 6.42 | 6.59 | 5.80 | 5.82 | 5.82 | -11.10% | 32,243 |
| Dec 12, 2025 | 7.00 | 7.45 | 6.50 | 6.55 | 6.55 | 6.94% | 31,452 |
| Dec 11, 2025 | 6.80 | 6.80 | 5.81 | 6.13 | 6.13 | -9.91% | 30,292 |
| Dec 10, 2025 | 7.54 | 7.81 | 6.80 | 6.80 | 6.80 | -9.86% | 18,126 |
| Dec 9, 2025 | 7.70 | 7.83 | 7.50 | 7.54 | 7.54 | 0.57% | 3,037 |
| Dec 8, 2025 | 7.50 | 7.83 | 7.40 | 7.50 | 7.50 | -1.99% | 3,255 |
| Dec 5, 2025 | 7.70 | 7.70 | 7.47 | 7.65 | 7.65 | 0.68% | 2,567 |
| Dec 4, 2025 | 7.73 | 7.81 | 7.50 | 7.60 | 7.60 | -1.03% | 1,978 |
| Dec 3, 2025 | 7.21 | 7.99 | 7.20 | 7.68 | 7.68 | 6.96% | 8,731 |