ClearSign Technologies Corporation (CLIR)
NASDAQ: CLIR · Real-Time Price · USD
4.630
+0.070 (1.54%)
At close: May 29, 2026, 4:00 PM EDT
4.620
-0.010 (-0.22%)
After-hours: May 29, 2026, 4:55 PM EDT
ClearSign Technologies Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| May 29, 2026 | 4.39 | 4.69 | 4.27 | 4.63 | 4.63 | 1.54% | 57,977 |
| May 28, 2026 | 4.45 | 4.75 | 4.41 | 4.56 | 4.56 | 2.47% | 26,108 |
| May 27, 2026 | 4.40 | 4.65 | 4.40 | 4.45 | 4.45 | -3.89% | 14,490 |
| May 26, 2026 | 4.61 | 4.88 | 4.60 | 4.63 | 4.63 | -4.54% | 51,487 |
| May 22, 2026 | 4.74 | 4.89 | 4.61 | 4.85 | 4.85 | -3.19% | 17,891 |
| May 21, 2026 | 4.73 | 5.01 | 4.59 | 5.01 | 5.01 | 2.24% | 8,068 |
| May 20, 2026 | 4.61 | 5.09 | 4.51 | 4.90 | 4.90 | 6.52% | 16,855 |
| May 19, 2026 | 4.47 | 4.65 | 4.46 | 4.60 | 4.60 | 4.31% | 6,202 |
| May 18, 2026 | 4.71 | 4.82 | 4.41 | 4.41 | 4.41 | -6.37% | 25,389 |
| May 15, 2026 | 4.86 | 5.07 | 4.62 | 4.71 | 4.71 | -9.51% | 21,737 |
| May 14, 2026 | 4.61 | 5.56 | 4.57 | 5.21 | 5.21 | 16.97% | 29,320 |
| May 13, 2026 | 4.49 | 4.74 | 4.35 | 4.45 | 4.45 | -2.20% | 16,132 |
| May 12, 2026 | 4.38 | 4.75 | 4.37 | 4.55 | 4.55 | 4.24% | 17,329 |
| May 11, 2026 | 4.61 | 4.61 | 4.18 | 4.37 | 4.36 | -3.86% | 22,542 |
| May 8, 2026 | 4.80 | 4.80 | 4.21 | 4.54 | 4.54 | -6.00% | 26,176 |
| May 7, 2026 | 4.97 | 4.98 | 4.62 | 4.83 | 4.83 | -1.63% | 16,310 |
| May 6, 2026 | 4.91 | 5.01 | 4.80 | 4.91 | 4.91 | - | 15,731 |
| May 5, 2026 | 4.94 | 4.99 | 4.88 | 4.91 | 4.91 | -2.96% | 4,995 |
| May 4, 2026 | 5.03 | 5.10 | 4.57 | 5.06 | 5.06 | -1.17% | 16,145 |
| May 1, 2026 | 5.05 | 5.22 | 5.01 | 5.12 | 5.12 | 2.40% | 14,552 |
| Apr 30, 2026 | 5.33 | 5.33 | 5.00 | 5.00 | 5.00 | -6.89% | 9,144 |
| Apr 29, 2026 | 5.33 | 5.56 | 5.33 | 5.37 | 5.37 | 0.75% | 2,881 |
| Apr 28, 2026 | 5.32 | 5.51 | 5.32 | 5.33 | 5.33 | 1.91% | 9,463 |
| Apr 27, 2026 | 4.88 | 5.33 | 4.73 | 5.23 | 5.23 | 4.60% | 14,731 |
| 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% | 15,256 |
| 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% | 11,908 |
| Apr 20, 2026 | 5.56 | 5.66 | 5.19 | 5.41 | 5.41 | -0.83% | 56,182 |
| Apr 17, 2026 | 5.33 | 5.68 | 5.33 | 5.45 | 5.45 | 2.25% | 21,245 |
| 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% | 17,682 |
| Apr 14, 2026 | 5.47 | 5.60 | 5.26 | 5.38 | 5.38 | -0.19% | 18,765 |
| 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 |