Quantum-Si incorporated QSI
1.15 USD -0.07 (-5.74%)
Regular-session close
1.18 +0.03 +2.21%
After hours · Nov 13, 7:57 PM ET
1.14 Day range 1.23
0.702 52-week range 1.75
- YTD
- +4.55%
- 1 year
- -17.27%
QSI price history
| Date | Open | High | Low | Close | Change | Change % | Volume |
|---|---|---|---|---|---|---|---|
| Nov 13, 2026 | 1.23 | 1.23 | 1.14 | 1.15 | -0.07 | -5.74% | 3,534,773 |
| Nov 12, 2026 | 1.17 | 1.25 | 1.16 | 1.22 | -0.05 | -3.94% | 5,464,513 |
| Nov 11, 2026 | 1.35 | 1.45 | 1.24 | 1.27 | -0.01 | -0.78% | 6,848,954 |
| Nov 10, 2026 | 1.33 | 1.39 | 1.24 | 1.28 | -0.09 | -6.57% | 5,387,757 |
| Nov 9, 2026 | 1.36 | 1.38 | 1.30 | 1.37 | +0.04 | +3.01% | 5,572,636 |
| Nov 6, 2026 | 1.18 | 1.45 | 1.18 | 1.33 | +0.16 | +13.68% | 8,206,700 |
| Nov 5, 2026 | 1.27 | 1.27 | 1.08 | 1.17 | -0.12 | -9.30% | 6,878,300 |
| Nov 4, 2026 | 1.31 | 1.33 | 1.21 | 1.29 | -0.01 | -0.77% | 6,364,800 |
| Nov 3, 2026 | 1.27 | 1.34 | 1.24 | 1.30 | +0.04 | +3.17% | 4,595,300 |
| Nov 2, 2026 | 1.49 | 1.50 | 1.23 | 1.26 | -0.20 | -13.70% | 8,195,500 |
| Oct 30, 2026 | 1.57 | 1.60 | 1.40 | 1.46 | -0.29 | -16.57% | 9,906,400 |
| Oct 29, 2026 | 1.68 | 1.81 | 1.66 | 1.75 | +0.03 | +1.74% | 8,843,400 |
| Oct 28, 2026 | 1.63 | 1.73 | 1.59 | 1.72 | +0.07 | +4.24% | 10,048,400 |
| Oct 27, 2026 | 1.50 | 1.75 | 1.50 | 1.65 | +0.19 | +13.01% | 16,529,700 |
| Oct 26, 2026 | 1.42 | 1.48 | 1.36 | 1.46 | +0.06 | +4.29% | 10,346,600 |
| Oct 23, 2026 | 1.15 | 1.42 | 1.15 | 1.40 | +0.25 | +21.74% | 11,461,200 |
| Oct 22, 2026 | 1.17 | 1.21 | 1.14 | 1.15 | -0.08 | -6.50% | 3,572,200 |
| Oct 21, 2026 | 1.16 | 1.23 | 1.16 | 1.23 | +0.07 | +6.03% | 3,422,700 |
| Oct 20, 2026 | 1.06 | 1.20 | 1.04 | 1.16 | +0.07 | +6.42% | 6,172,600 |
| Oct 19, 2026 | 1.14 | 1.15 | 1.01 | 1.09 | -0.03 | -2.68% | 8,714,000 |
| Oct 16, 2026 | 1.33 | 1.33 | 1.10 | 1.12 | -0.19 | -14.50% | 7,690,600 |
| Oct 15, 2026 | 1.35 | 1.39 | 1.24 | 1.31 | -0.08 | -5.76% | 9,269,400 |
| Oct 14, 2026 | 1.34 | 1.44 | 1.33 | 1.39 | -0.02 | -1.42% | 5,364,900 |
| Oct 13, 2026 | 1.35 | 1.46 | 1.31 | 1.41 | +0.05 | +3.68% | 6,239,600 |
| Oct 12, 2026 | 1.48 | 1.48 | 1.34 | 1.36 | -0.17 | -11.11% | 10,356,400 |
| Oct 9, 2026 | 1.26 | 1.66 | 1.26 | 1.53 | +0.31 | +25.41% | 40,903,900 |
| Oct 8, 2026 | 1.29 | 1.30 | 1.20 | 1.22 | -0.06 | -4.69% | 5,851,500 |
| Oct 7, 2026 | 1.17 | 1.31 | 1.09 | 1.28 | +0.06 | +4.92% | 8,037,000 |
| Oct 6, 2026 | 1.29 | 1.41 | 1.19 | 1.22 | -0.06 | -4.69% | 8,703,200 |
| Oct 5, 2026 | 1.52 | 1.53 | 1.26 | 1.28 | -0.27 | -17.42% | 19,185,000 |
| Oct 2, 2026 | 1.38 | 1.55 | 1.17 | 1.55 | +0.12 | +8.39% | 18,774,100 |
| Oct 1, 2026 | 1.20 | 1.48 | 1.15 | 1.43 | +0.36 | +33.64% | 33,063,400 |
| Sep 30, 2026 | 0.96 | 1.12 | 0.96 | 1.07 | +0.11 | +11.69% | 13,838,800 |
| Sep 29, 2026 | 0.81 | 1.03 | 0.81 | 0.96 | +0.16 | +20.50% | 23,007,100 |
| Sep 28, 2026 | 0.83 | 0.83 | 0.80 | 0.80 | -0.04 | -4.68% | 1,562,300 |
| Sep 25, 2026 | 0.79 | 0.84 | 0.78 | 0.83 | +0.05 | +6.24% | 2,593,500 |
| Sep 24, 2026 | 0.75 | 0.80 | 0.74 | 0.79 | +0.03 | +3.43% | 1,593,300 |
| Sep 23, 2026 | 0.79 | 0.81 | 0.75 | 0.76 | -0.03 | -3.31% | 1,476,500 |
| Sep 22, 2026 | 0.76 | 0.79 | 0.75 | 0.79 | +0.03 | +3.84% | 2,429,900 |
| Sep 21, 2026 | 0.76 | 0.77 | 0.75 | 0.76 | +0.01 | +1.48% | 1,122,800 |
| Sep 18, 2026 | 0.79 | 0.80 | 0.74 | 0.75 | -0.03 | -3.25% | 1,708,600 |
| Sep 17, 2026 | 0.75 | 0.80 | 0.75 | 0.77 | +0.04 | +5.48% | 2,823,600 |
| Sep 16, 2026 | 0.72 | 0.75 | 0.72 | 0.73 | +0.01 | +1.39% | 909,700 |
| Sep 15, 2026 | 0.72 | 0.74 | 0.72 | 0.72 | -0.01 | -0.69% | 1,164,700 |
| Sep 14, 2026 | 0.73 | 0.75 | 0.72 | 0.73 | -0.02 | -2.03% | 1,387,900 |
| Sep 11, 2026 | 0.74 | 0.76 | 0.74 | 0.74 | 0.00 | +0.14% | 1,069,100 |
| Sep 10, 2026 | 0.75 | 0.76 | 0.73 | 0.74 | -0.01 | -1.47% | 1,712,500 |
| Sep 9, 2026 | 0.76 | 0.78 | 0.75 | 0.75 | -0.01 | -1.32% | 1,441,900 |
| Sep 8, 2026 | 0.77 | 0.79 | 0.76 | 0.76 | -0.01 | -0.78% | 1,049,000 |
| Sep 4, 2026 | 0.76 | 0.77 | 0.76 | 0.77 | +0.01 | +0.66% | 897,300 |
| Sep 3, 2026 | 0.77 | 0.79 | 0.76 | 0.76 | 0.00 | 0.00% | 980,000 |
| Sep 2, 2026 | 0.76 | 0.79 | 0.75 | 0.76 | 0.00 | +0.53% | 1,615,600 |
| Sep 1, 2026 | 0.75 | 0.78 | 0.75 | 0.76 | -0.01 | -1.17% | 1,503,700 |
| Aug 31, 2026 | 0.78 | 0.78 | 0.76 | 0.77 | -0.01 | -1.79% | 1,133,200 |
| Aug 28, 2026 | 0.82 | 0.82 | 0.77 | 0.78 | -0.02 | -2.86% | 2,412,700 |
| Aug 27, 2026 | 0.79 | 0.83 | 0.79 | 0.80 | +0.01 | +1.52% | 1,373,600 |
| Aug 26, 2026 | 0.85 | 0.86 | 0.79 | 0.79 | -0.06 | -6.61% | 2,662,900 |
| Aug 25, 2026 | 0.79 | 0.86 | 0.78 | 0.85 | +0.08 | +10.14% | 4,366,300 |
| Aug 24, 2026 | 0.80 | 0.83 | 0.75 | 0.77 | -0.07 | -7.90% | 3,853,800 |
| Aug 21, 2026 | 0.79 | 0.93 | 0.78 | 0.84 | +0.05 | +7.05% | 7,825,100 |
| Aug 20, 2026 | 0.77 | 0.81 | 0.77 | 0.78 | +0.01 | +1.30% | 3,233,600 |
| Aug 19, 2026 | 0.72 | 0.79 | 0.72 | 0.77 | +0.04 | +5.77% | 2,863,200 |
| Aug 18, 2026 | 0.73 | 0.74 | 0.72 | 0.73 | -0.02 | -2.15% | 1,520,300 |
| Aug 17, 2026 | 0.74 | 0.80 | 0.74 | 0.74 | 0.00 | +0.54% | 2,429,700 |
| Aug 14, 2026 | 0.75 | 0.77 | 0.71 | 0.74 | -0.05 | -6.33% | 7,000,700 |
65 days, newest first. Daily bars as drawn on the QSI chart; change is against the previous day's close. Open, high, low and volume are in the download and on a wider screen.