ALT5 Sigma Corporation (ALTS)
NASDAQ: ALTS · Real-Time Price · USD
2.070
+0.210 (11.29%)
At close: Oct 23, 2025, 4:00 PM EDT
2.090
+0.020 (0.97%)
After-hours: Oct 23, 2025, 6:38 PM EDT
ALT5 Sigma Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Oct 23, 2025 | 1.84 | 2.10 | 1.82 | 2.07 | - | 11.29% | 8,049,863 |
| Oct 22, 2025 | 1.99 | 2.01 | 1.80 | 1.86 | 1.86 | -8.82% | 8,455,874 |
| Oct 21, 2025 | 2.13 | 2.16 | 2.02 | 2.04 | 2.04 | -5.56% | 4,031,025 |
| Oct 20, 2025 | 1.99 | 2.21 | 1.99 | 2.16 | 2.16 | 11.05% | 5,884,965 |
| Oct 17, 2025 | 2.12 | 2.14 | 1.94 | 1.95 | 1.95 | -11.19% | 6,838,053 |
| Oct 16, 2025 | 2.42 | 2.47 | 2.17 | 2.19 | 2.19 | -9.13% | 6,648,908 |
| Oct 15, 2025 | 2.48 | 2.57 | 2.34 | 2.41 | 2.41 | -3.41% | 3,832,779 |
| Oct 14, 2025 | 2.31 | 2.54 | 2.28 | 2.50 | 2.50 | 2.67% | 5,363,731 |
| Oct 13, 2025 | 2.42 | 2.53 | 2.36 | 2.43 | 2.43 | -7.78% | 5,485,555 |
| Oct 10, 2025 | 2.85 | 3.08 | 2.59 | 2.64 | 2.64 | -8.82% | 8,323,229 |
| Oct 9, 2025 | 2.74 | 2.91 | 2.65 | 2.89 | 2.89 | 3.58% | 7,462,480 |
| Oct 8, 2025 | 2.81 | 2.92 | 2.70 | 2.79 | 2.79 | 0.36% | 6,054,126 |
| Oct 7, 2025 | 2.97 | 3.09 | 2.75 | 2.78 | 2.78 | -5.76% | 5,987,453 |
| Oct 6, 2025 | 2.97 | 3.10 | 2.77 | 2.95 | 2.95 | 2.79% | 7,071,287 |
| Oct 3, 2025 | 2.82 | 3.01 | 2.73 | 2.87 | 2.87 | 3.24% | 8,432,344 |
| Oct 2, 2025 | 2.63 | 2.80 | 2.45 | 2.78 | 2.78 | 5.70% | 10,172,544 |
| Oct 1, 2025 | 2.72 | 2.77 | 2.48 | 2.63 | 2.63 | -2.23% | 7,470,457 |
| Sep 30, 2025 | 2.76 | 2.76 | 2.55 | 2.69 | 2.69 | -4.61% | 7,649,973 |
| Sep 29, 2025 | 3.13 | 3.18 | 2.76 | 2.82 | 2.82 | -9.03% | 9,265,018 |
| Sep 26, 2025 | 3.07 | 3.15 | 2.87 | 3.10 | 3.10 | 1.31% | 9,901,020 |
| Sep 25, 2025 | 3.26 | 3.28 | 3.05 | 3.06 | 3.06 | -10.53% | 7,961,266 |
| Sep 24, 2025 | 3.79 | 3.83 | 3.41 | 3.42 | 3.42 | -9.28% | 8,268,932 |
| Sep 23, 2025 | 3.76 | 4.00 | 3.75 | 3.77 | 3.77 | - | 7,256,110 |
| Sep 22, 2025 | 3.90 | 3.91 | 3.68 | 3.77 | 3.77 | -3.33% | 5,144,360 |
| Sep 19, 2025 | 3.80 | 4.22 | 3.77 | 3.90 | 3.90 | 5.98% | 17,855,282 |
| Sep 18, 2025 | 3.79 | 3.90 | 3.62 | 3.68 | 3.68 | -0.27% | 5,947,543 |
| Sep 17, 2025 | 3.73 | 3.90 | 3.57 | 3.69 | 3.69 | - | 6,997,755 |
| Sep 16, 2025 | 3.96 | 3.97 | 3.68 | 3.69 | 3.69 | -5.87% | 6,278,982 |
| Sep 15, 2025 | 4.11 | 4.16 | 3.86 | 3.92 | 3.92 | -6.22% | 7,843,712 |
| Sep 12, 2025 | 4.01 | 4.22 | 3.90 | 4.18 | 4.18 | 5.29% | 6,529,631 |
| Sep 11, 2025 | 3.95 | 4.12 | 3.80 | 3.97 | 3.97 | 1.15% | 8,736,007 |
| Sep 10, 2025 | 3.99 | 4.27 | 3.85 | 3.93 | 3.93 | -2.12% | 8,857,578 |
| Sep 9, 2025 | 4.13 | 4.38 | 3.36 | 4.01 | 4.01 | -2.91% | 13,340,240 |
| Sep 8, 2025 | 4.61 | 4.61 | 3.97 | 4.13 | 4.13 | -6.03% | 14,280,064 |
| Sep 5, 2025 | 3.92 | 4.41 | 3.78 | 4.40 | 4.40 | 13.57% | 18,986,613 |
| Sep 4, 2025 | 3.96 | 4.21 | 3.55 | 3.87 | 3.87 | -13.81% | 27,746,124 |
| Sep 3, 2025 | 5.57 | 5.57 | 4.45 | 4.49 | 4.49 | -19.53% | 24,934,610 |
| Sep 2, 2025 | 6.62 | 6.68 | 5.48 | 5.58 | 5.58 | -29.19% | 33,885,744 |
| Aug 29, 2025 | 8.32 | 8.74 | 7.52 | 7.88 | 7.88 | -5.63% | 19,508,182 |
| Aug 28, 2025 | 7.18 | 8.43 | 7.02 | 8.35 | 8.35 | 21.90% | 21,237,185 |
| Aug 27, 2025 | 7.20 | 7.73 | 6.81 | 6.85 | 6.85 | -4.20% | 12,456,830 |
| Aug 26, 2025 | 7.00 | 7.23 | 6.71 | 7.15 | 7.15 | 5.15% | 10,928,450 |
| Aug 25, 2025 | 6.43 | 7.33 | 6.37 | 6.80 | 6.80 | 3.50% | 18,255,282 |
| Aug 22, 2025 | 5.55 | 6.69 | 5.50 | 6.57 | 6.57 | 19.13% | 15,775,203 |
| Aug 21, 2025 | 5.76 | 5.90 | 5.50 | 5.52 | 5.52 | -6.37% | 6,178,629 |
| Aug 20, 2025 | 5.56 | 5.95 | 5.20 | 5.89 | 5.89 | 7.48% | 9,830,730 |
| Aug 19, 2025 | 6.52 | 6.55 | 5.25 | 5.48 | 5.48 | -10.46% | 15,736,347 |
| Aug 18, 2025 | 6.21 | 6.36 | 5.87 | 6.12 | 6.12 | 3.03% | 10,048,616 |
| Aug 15, 2025 | 7.31 | 7.31 | 5.86 | 5.94 | 5.94 | -17.61% | 14,320,574 |
| Aug 14, 2025 | 7.35 | 7.58 | 7.03 | 7.21 | 7.21 | 3.59% | 16,542,216 |