ALT5 Sigma Corporation (ALTS)
NASDAQ: ALTS · Real-Time Price · USD
1.440
-0.080 (-5.26%)
At close: Feb 20, 2026, 4:00 PM EST
1.490
+0.050 (3.47%)
After-hours: Feb 20, 2026, 7:49 PM EST
ALT5 Sigma Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Feb 20, 2026 | 1.51 | 1.54 | 1.43 | 1.44 | 1.44 | -5.26% | 1,795,926 |
| Feb 19, 2026 | 1.46 | 1.54 | 1.43 | 1.52 | 1.52 | 1.33% | 1,620,584 |
| Feb 18, 2026 | 1.50 | 1.59 | 1.47 | 1.50 | 1.50 | 4.90% | 3,097,510 |
| Feb 17, 2026 | 1.47 | 1.51 | 1.38 | 1.43 | 1.43 | -4.03% | 2,024,584 |
| Feb 13, 2026 | 1.42 | 1.55 | 1.40 | 1.49 | 1.49 | 4.93% | 3,291,246 |
| Feb 12, 2026 | 1.50 | 1.50 | 1.37 | 1.42 | 1.42 | -4.70% | 1,448,960 |
| Feb 11, 2026 | 1.66 | 1.67 | 1.47 | 1.49 | 1.49 | -10.24% | 2,688,511 |
| Feb 10, 2026 | 1.76 | 1.77 | 1.64 | 1.66 | 1.66 | -6.21% | 2,346,290 |
| Feb 9, 2026 | 1.67 | 1.84 | 1.60 | 1.77 | 1.77 | 4.12% | 5,280,606 |
| Feb 6, 2026 | 1.57 | 1.75 | 1.57 | 1.70 | 1.70 | 10.39% | 3,534,795 |
| Feb 5, 2026 | 1.63 | 1.67 | 1.50 | 1.54 | 1.54 | -10.47% | 4,124,359 |
| Feb 4, 2026 | 1.98 | 2.02 | 1.70 | 1.72 | 1.72 | -18.10% | 6,273,079 |
| Feb 3, 2026 | 1.95 | 2.13 | 1.90 | 2.10 | 2.10 | 6.87% | 3,702,250 |
| Feb 2, 2026 | 2.00 | 2.05 | 1.89 | 1.97 | 1.97 | -6.43% | 3,537,063 |
| Jan 30, 2026 | 2.12 | 2.21 | 2.05 | 2.10 | 2.10 | -2.33% | 3,085,435 |
| Jan 29, 2026 | 2.32 | 2.58 | 2.10 | 2.15 | 2.15 | 1.42% | 6,506,140 |
| Jan 28, 2026 | 2.22 | 2.25 | 2.08 | 2.12 | 2.12 | -3.20% | 2,341,120 |
| Jan 27, 2026 | 2.05 | 2.21 | 2.00 | 2.19 | 2.19 | 10.05% | 2,948,623 |
| Jan 26, 2026 | 2.13 | 2.17 | 1.98 | 1.99 | 1.99 | -9.13% | 3,415,591 |
| Jan 23, 2026 | 2.30 | 2.32 | 2.05 | 2.19 | 2.19 | -4.78% | 4,114,718 |
| Jan 22, 2026 | 2.50 | 2.54 | 2.21 | 2.30 | 2.30 | -6.50% | 4,182,604 |
| Jan 21, 2026 | 2.55 | 2.70 | 2.31 | 2.46 | 2.46 | -1.20% | 5,635,990 |
| Jan 20, 2026 | 2.37 | 2.74 | 2.30 | 2.49 | 2.49 | -3.86% | 7,597,405 |
| Jan 16, 2026 | 2.47 | 2.64 | 2.36 | 2.59 | 2.59 | 7.02% | 5,906,886 |
| Jan 15, 2026 | 2.36 | 2.50 | 2.24 | 2.42 | 2.42 | 2.11% | 6,854,735 |
| Jan 14, 2026 | 2.16 | 2.40 | 2.05 | 2.37 | 2.37 | 30.94% | 21,690,111 |
| Jan 13, 2026 | 1.65 | 1.86 | 1.60 | 1.81 | 1.81 | 12.42% | 5,756,928 |
| Jan 12, 2026 | 1.60 | 1.65 | 1.55 | 1.61 | 1.61 | - | 2,117,968 |
| Jan 9, 2026 | 1.64 | 1.68 | 1.54 | 1.61 | 1.61 | -4.17% | 2,924,545 |
| Jan 8, 2026 | 1.48 | 1.70 | 1.48 | 1.68 | 1.68 | 15.07% | 5,743,977 |
| Jan 7, 2026 | 1.53 | 1.54 | 1.42 | 1.46 | 1.46 | -5.19% | 2,449,939 |
| Jan 6, 2026 | 1.53 | 1.62 | 1.45 | 1.54 | 1.54 | 1.99% | 5,787,122 |
| Jan 5, 2026 | 1.31 | 1.55 | 1.29 | 1.51 | 1.51 | 24.79% | 8,181,193 |
| Jan 2, 2026 | 1.13 | 1.22 | 1.12 | 1.21 | 1.21 | 10.00% | 3,851,192 |
| Dec 31, 2025 | 1.10 | 1.17 | 1.08 | 1.10 | 1.10 | -1.79% | 2,951,331 |
| Dec 30, 2025 | 1.17 | 1.21 | 1.09 | 1.12 | 1.12 | -5.08% | 5,464,315 |
| Dec 29, 2025 | 1.16 | 1.26 | 1.16 | 1.18 | 1.18 | - | 2,921,151 |
| Dec 26, 2025 | 1.18 | 1.21 | 1.14 | 1.18 | 1.18 | - | 1,875,096 |
| Dec 24, 2025 | 1.12 | 1.22 | 1.10 | 1.18 | 1.18 | 1.72% | 2,011,325 |
| Dec 23, 2025 | 1.20 | 1.20 | 1.14 | 1.16 | 1.16 | -5.69% | 5,372,792 |
| Dec 22, 2025 | 1.33 | 1.37 | 1.20 | 1.23 | 1.23 | -6.11% | 5,517,724 |
| Dec 19, 2025 | 1.35 | 1.38 | 1.29 | 1.31 | 1.31 | -1.50% | 4,582,462 |
| Dec 18, 2025 | 1.29 | 1.42 | 1.27 | 1.33 | 1.33 | 7.26% | 5,913,760 |
| Dec 17, 2025 | 1.33 | 1.35 | 1.22 | 1.24 | 1.24 | -6.77% | 3,499,976 |
| Dec 16, 2025 | 1.33 | 1.40 | 1.23 | 1.33 | 1.33 | -1.85% | 3,347,037 |
| Dec 15, 2025 | 1.47 | 1.47 | 1.30 | 1.36 | 1.36 | -8.45% | 3,177,938 |
| Dec 12, 2025 | 1.52 | 1.62 | 1.47 | 1.48 | 1.48 | -2.63% | 2,320,254 |
| Dec 11, 2025 | 1.48 | 1.55 | 1.43 | 1.52 | 1.52 | 0.66% | 1,759,945 |
| Dec 10, 2025 | 1.47 | 1.55 | 1.35 | 1.51 | 1.51 | 0.67% | 3,852,190 |
| Dec 9, 2025 | 1.38 | 1.60 | 1.37 | 1.50 | 1.50 | 7.91% | 4,933,522 |