ClearSign Technologies Corporation (CLIR)
NASDAQ: CLIR · Real-Time Price · USD
2.310
-0.140 (-5.71%)
At close: Oct 23, 2026, 4:00 PM EDT
2.320
+0.010 (0.43%)
After-hours: Oct 23, 2026, 4:10 PM EDT
ClearSign Technologies Stock Price History
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 23, 2026 | 2.40 | 2.53 | 2.17 | 2.31 | 2.31 | -5.71% | 16,283 |
| Oct 22, 2026 | 2.51 | 2.51 | 2.22 | 2.45 | 2.45 | 0.41% | 3,127 |
| Oct 21, 2026 | 2.50 | 2.54 | 2.32 | 2.44 | 2.44 | -2.01% | 9,530 |
| Oct 20, 2026 | 2.43 | 2.52 | 2.43 | 2.49 | 2.49 | 6.41% | 11,806 |
| Oct 19, 2026 | 2.50 | 2.56 | 2.12 | 2.34 | 2.34 | -2.50% | 47,661 |
| Oct 16, 2026 | 2.54 | 2.69 | 2.36 | 2.40 | 2.40 | -2.04% | 27,972 |
| Oct 15, 2026 | 2.77 | 2.78 | 2.35 | 2.45 | 2.45 | -7.02% | 24,784 |
| Oct 14, 2026 | 2.83 | 2.85 | 2.62 | 2.64 | 2.64 | -8.51% | 18,963 |
| Oct 13, 2026 | 3.01 | 3.13 | 2.86 | 2.88 | 2.88 | -2.70% | 33,285 |
| Oct 12, 2026 | 3.20 | 3.23 | 2.92 | 2.96 | 2.96 | -7.79% | 22,885 |
| Oct 9, 2026 | 3.12 | 3.32 | 3.12 | 3.21 | 3.21 | 3.22% | 25,603 |
| Oct 8, 2026 | 3.27 | 3.43 | 3.11 | 3.11 | 3.11 | -5.76% | 13,777 |
| Oct 7, 2026 | 3.24 | 3.39 | 3.24 | 3.30 | 3.30 | - | 9,691 |
| Oct 6, 2026 | 3.30 | 3.77 | 3.29 | 3.30 | 3.30 | - | 9,114 |
| Oct 5, 2026 | 3.53 | 3.74 | 3.30 | 3.30 | 3.30 | -5.98% | 41,682 |
| Oct 2, 2026 | 3.57 | 3.64 | 3.41 | 3.51 | 3.51 | -1.13% | 28,444 |
| Oct 1, 2026 | 3.33 | 3.76 | 3.26 | 3.55 | 3.55 | - | 13,981 |
| Sep 30, 2026 | 3.76 | 3.86 | 3.55 | 3.55 | 3.55 | -4.83% | 7,794 |
| Sep 29, 2026 | 3.65 | 3.90 | 3.65 | 3.73 | 3.73 | 2.19% | 6,792 |
| Sep 28, 2026 | 3.50 | 3.71 | 3.29 | 3.65 | 3.65 | 5.78% | 31,808 |
| Sep 25, 2026 | 3.59 | 3.60 | 3.38 | 3.45 | 3.45 | -0.27% | 11,660 |
| Sep 24, 2026 | 3.52 | 3.73 | 3.41 | 3.46 | 3.46 | -2.26% | 17,414 |
| Sep 23, 2026 | 3.76 | 4.01 | 3.47 | 3.54 | 3.54 | -5.60% | 36,853 |
| Sep 22, 2026 | 3.77 | 3.96 | 3.75 | 3.75 | 3.75 | -1.06% | 6,100 |
| Sep 21, 2026 | 3.85 | 4.05 | 3.79 | 3.79 | 3.79 | -1.56% | 10,781 |
| Sep 18, 2026 | 3.71 | 3.90 | 3.71 | 3.85 | 3.85 | 6.65% | 19,243 |
| Sep 17, 2026 | 3.60 | 3.75 | 3.60 | 3.61 | 3.61 | 2.56% | 8,696 |
| Sep 16, 2026 | 3.88 | 3.98 | 3.50 | 3.52 | 3.52 | -12.76% | 71,974 |
| Sep 15, 2026 | 3.80 | 4.18 | 3.79 | 4.04 | 4.04 | 4.81% | 5,867 |
| Sep 14, 2026 | 3.97 | 4.27 | 3.80 | 3.85 | 3.85 | -4.47% | 23,773 |
| Sep 11, 2026 | 4.09 | 4.18 | 3.74 | 4.03 | 4.03 | -0.25% | 68,707 |
| Sep 10, 2026 | 4.15 | 4.28 | 3.90 | 4.04 | 4.04 | -4.27% | 49,884 |
| Sep 9, 2026 | 4.41 | 4.41 | 4.22 | 4.22 | 4.22 | -2.09% | 3,323 |
| Sep 8, 2026 | 4.00 | 4.72 | 4.00 | 4.31 | 4.31 | 10.23% | 19,515 |
| Sep 4, 2026 | 3.98 | 4.15 | 3.90 | 3.91 | 3.91 | -4.59% | 9,241 |
| Sep 3, 2026 | 4.27 | 4.32 | 3.95 | 4.10 | 4.10 | -3.58% | 42,242 |
| Sep 2, 2026 | 4.22 | 4.45 | 4.10 | 4.25 | 4.25 | 2.41% | 10,715 |
| Sep 1, 2026 | 4.20 | 4.20 | 4.15 | 4.15 | 4.15 | -2.58% | 1,608 |
| Aug 31, 2026 | 4.35 | 4.36 | 4.22 | 4.26 | 4.26 | -4.59% | 4,953 |
| Aug 28, 2026 | 4.58 | 4.75 | 4.47 | 4.47 | 4.47 | -1.43% | 4,944 |
| Aug 27, 2026 | 4.70 | 4.81 | 4.50 | 4.53 | 4.53 | -2.79% | 7,095 |
| Aug 26, 2026 | 4.67 | 4.80 | 4.57 | 4.66 | 4.66 | -0.85% | 8,598 |
| Aug 25, 2026 | 4.88 | 4.94 | 4.61 | 4.70 | 4.70 | -2.89% | 29,286 |
| Aug 24, 2026 | 4.43 | 4.89 | 4.35 | 4.84 | 4.84 | 8.07% | 30,212 |
| Aug 21, 2026 | 4.20 | 4.56 | 4.09 | 4.48 | 4.48 | -4.40% | 23,065 |
| Aug 20, 2026 | 4.53 | 4.96 | 3.86 | 4.69 | 4.69 | 6.48% | 31,789 |
| Aug 19, 2026 | 4.71 | 4.77 | 4.29 | 4.40 | 4.40 | -5.78% | 22,765 |
| Aug 18, 2026 | 4.69 | 4.85 | 4.40 | 4.67 | 4.67 | 2.41% | 13,806 |
| Aug 17, 2026 | 4.67 | 5.00 | 4.31 | 4.56 | 4.56 | -1.94% | 20,925 |
| Aug 14, 2026 | 4.10 | 4.70 | 4.10 | 4.65 | 4.65 | 9.41% | 27,226 |