NASDAQ : QSI
Quantum-Si incorporated — Price history
Healthcare · Medical Devices · United States
Last price 1.46 USD (Oct 30, 2026, 4:00 PM EST) · Market cap 319.57M
Overview · Financial statements · Key statistics · Dividends · Company profile · Price history · Reports
Price history
Quantum-Si incorporated (QSI) closed at 1.26 USD on 2026-11-02. Daily open, high, low, close and volume for recent sessions:
| Date | Open | High | Low | Close | Volume | Change |
|---|---|---|---|---|---|---|
| 2026-11-02 | 1.49 | 1.5 | 1.23 | 1.26 | 8,205,435 | -13.70% |
| 2026-10-30 | 1.57 | 1.6 | 1.405 | 1.46 | 9,906,415 | -16.57% |
| 2026-10-29 | 1.681 | 1.81 | 1.66 | 1.75 | 8,843,404 | +1.74% |
| 2026-10-28 | 1.63 | 1.73 | 1.59 | 1.72 | 10,048,379 | +4.24% |
| 2026-10-27 | 1.5 | 1.75 | 1.495 | 1.65 | 16,529,703 | +13.01% |
| 2026-10-26 | 1.425 | 1.48 | 1.36 | 1.46 | 10,346,556 | +4.29% |
| 2026-10-23 | 1.155 | 1.42 | 1.15 | 1.4 | 11,461,196 | +21.74% |
| 2026-10-22 | 1.17 | 1.21 | 1.145 | 1.15 | 3,572,179 | -6.50% |
| 2026-10-21 | 1.16 | 1.23 | 1.16 | 1.23 | 3,422,744 | +6.03% |
| 2026-10-20 | 1.06 | 1.2 | 1.04 | 1.16 | 6,182,607 | +6.42% |
| 2026-10-19 | 1.145 | 1.15 | 1.01 | 1.09 | 8,713,998 | -2.68% |
| 2026-10-16 | 1.33 | 1.33 | 1.1 | 1.12 | 7,690,617 | -14.50% |
| 2026-10-15 | 1.35 | 1.39 | 1.24 | 1.31 | 9,269,416 | -5.76% |
| 2026-10-14 | 1.34 | 1.44 | 1.33 | 1.39 | 5,364,923 | -1.42% |
| 2026-10-13 | 1.345 | 1.46 | 1.31 | 1.41 | 6,239,642 | +3.68% |
| 2026-10-12 | 1.475 | 1.475 | 1.34 | 1.36 | 10,356,374 | -11.11% |
| 2026-10-09 | 1.26 | 1.66 | 1.258 | 1.53 | 40,903,937 | +25.41% |
| 2026-10-08 | 1.29 | 1.3 | 1.2 | 1.22 | 5,851,471 | -4.69% |
| 2026-10-07 | 1.17 | 1.31 | 1.09 | 1.28 | 8,036,980 | +4.92% |
| 2026-10-06 | 1.29 | 1.41 | 1.19 | 1.22 | 8,703,208 | -4.69% |
| 2026-10-05 | 1.525 | 1.53 | 1.26 | 1.28 | 19,185,008 | -17.42% |
| 2026-10-02 | 1.385 | 1.55 | 1.17 | 1.55 | 18,774,124 | +8.39% |
| 2026-10-01 | 1.2 | 1.48 | 1.15 | 1.43 | 33,063,446 | +33.64% |
| 2026-09-30 | 0.96 | 1.12 | 0.96 | 1.07 | 13,838,833 | +11.68% |
| 2026-09-29 | 0.805 | 1.03 | 0.805 | 0.9581 | 23,007,123 | +20.52% |
| 2026-09-28 | 0.825 | 0.8338 | 0.795 | 0.795 | 1,567,026 | -4.71% |
| 2026-09-25 | 0.7943 | 0.84 | 0.7755 | 0.8343 | 2,593,482 | +6.28% |
| 2026-09-24 | 0.75 | 0.7991 | 0.7434 | 0.785 | 1,593,305 | +3.47% |
| 2026-09-23 | 0.79 | 0.805 | 0.7515 | 0.7587 | 1,476,524 | -3.31% |
| 2026-09-22 | 0.76 | 0.792 | 0.7511 | 0.7847 | 2,429,915 | +3.81% |
| 2026-09-21 | 0.7588 | 0.7661 | 0.75 | 0.7559 | 1,126,539 | +1.45% |
| 2026-09-18 | 0.79 | 0.8015 | 0.74 | 0.7451 | 1,713,327 | -3.23% |
| 2026-09-17 | 0.7495 | 0.7963 | 0.7495 | 0.77 | 2,826,083 | +5.47% |
| 2026-09-16 | 0.721 | 0.7532 | 0.721 | 0.7301 | 915,220 | +1.40% |
| 2026-09-15 | 0.72 | 0.7409 | 0.72 | 0.72 | 1,166,814 | -0.69% |
| 2026-09-14 | 0.7287 | 0.7478 | 0.7201 | 0.725 | 1,390,457 | -2.03% |
| 2026-09-11 | 0.7391 | 0.755 | 0.7391 | 0.74 | 1,074,254 | +0.12% |
| 2026-09-10 | 0.75 | 0.755 | 0.7251 | 0.7391 | 1,715,325 | -1.45% |
| 2026-09-09 | 0.7602 | 0.7748 | 0.746 | 0.75 | 1,449,017 | -1.32% |
| 2026-09-08 | 0.7672 | 0.79 | 0.76 | 0.76 | 1,054,362 | -0.78% |
| 2026-09-04 | 0.76 | 0.7742 | 0.76 | 0.766 | 898,780 | +0.66% |
| 2026-09-03 | 0.7669 | 0.7862 | 0.76 | 0.761 | 979,996 | +0.00% |
| 2026-09-02 | 0.7586 | 0.785 | 0.75 | 0.761 | 1,619,343 | +0.49% |
| 2026-09-01 | 0.75 | 0.7768 | 0.7499 | 0.7573 | 1,504,027 | -1.12% |
| 2026-08-31 | 0.7787 | 0.78 | 0.763 | 0.7659 | 1,134,395 | -1.81% |
| 2026-08-28 | 0.8219 | 0.822 | 0.77 | 0.78 | 2,417,639 | -2.88% |
| 2026-08-27 | 0.7911 | 0.8337 | 0.79 | 0.8031 | 1,375,317 | +1.58% |
| 2026-08-26 | 0.85 | 0.855 | 0.7901 | 0.7906 | 2,662,928 | -6.69% |
| 2026-08-25 | 0.7888 | 0.859 | 0.7817 | 0.8473 | 4,371,714 | +10.14% |
| 2026-08-24 | 0.8 | 0.83 | 0.7515 | 0.7693 | 3,853,818 | -7.87% |
| 2026-08-21 | 0.7848 | 0.931 | 0.78 | 0.835 | 7,825,142 | +7.05% |
| 2026-08-20 | 0.7666 | 0.8099 | 0.7666 | 0.78 | 3,233,617 | +1.29% |
| 2026-08-19 | 0.7193 | 0.7845 | 0.7193 | 0.7701 | 2,863,169 | +5.78% |
| 2026-08-18 | 0.7325 | 0.7439 | 0.7184 | 0.728 | 1,520,320 | -2.18% |
| 2026-08-17 | 0.74 | 0.795 | 0.7394 | 0.7442 | 2,429,723 | +0.59% |
| 2026-08-14 | 0.75 | 0.767 | 0.71 | 0.7398 | 7,000,672 | -6.35% |
| 2026-08-13 | 0.855 | 0.9138 | 0.79 | 0.79 | 4,378,334 | -5.66% |
| 2026-08-12 | 0.8308 | 0.8699 | 0.8256 | 0.8374 | 1,499,136 | +2.10% |
| 2026-08-11 | 0.7951 | 0.8489 | 0.7951 | 0.8202 | 2,056,311 | +3.81% |
| 2026-08-10 | 0.8176 | 0.84 | 0.7901 | 0.7901 | 2,434,391 | -2.98% |
| 2026-08-07 | 0.7618 | 0.8285 | 0.7618 | 0.8144 | 2,730,130 | +7.87% |
| 2026-08-06 | 0.7522 | 0.779 | 0.75 | 0.755 | 1,493,531 | -0.20% |
| 2026-08-05 | 0.7752 | 0.7926 | 0.7565 | 0.7565 | 2,484,838 | -1.16% |
| 2026-08-04 | 0.7642 | 0.796 | 0.7642 | 0.7654 | 3,986,331 | +2.60% |
| 2026-08-03 | 0.72 | 0.7599 | 0.711 | 0.746 | 2,706,253 | +4.72% |
| 2026-07-31 | 0.73 | 0.748 | 0.71 | 0.7124 | 1,840,507 | -1.06% |
| 2026-07-30 | 0.7256 | 0.7441 | 0.69 | 0.72 | 3,557,133 | +2.52% |
| 2026-07-29 | 0.7574 | 0.7799 | 0.7023 | 0.7023 | 4,102,774 | -7.67% |
| 2026-07-28 | 0.775 | 0.7799 | 0.7401 | 0.7606 | 3,268,923 | -2.91% |
| 2026-07-27 | 0.7884 | 0.8097 | 0.7715 | 0.7834 | 1,086,514 | +1.73% |
| 2026-07-24 | 0.7944 | 0.8012 | 0.7608 | 0.7701 | 2,588,776 | -2.52% |
| 2026-07-23 | 0.79 | 0.828 | 0.7809 | 0.79 | 3,288,670 | -1.25% |
| 2026-07-22 | 0.81 | 0.8454 | 0.8 | 0.8 | 2,843,612 | -4.31% |
| 2026-07-21 | 0.8216 | 0.8498 | 0.8216 | 0.836 | 1,470,894 | +2.33% |
| 2026-07-20 | 0.83 | 0.8422 | 0.8099 | 0.817 | 1,502,339 | -0.66% |
| 2026-07-17 | 0.82 | 0.8462 | 0.803 | 0.8224 | 2,295,009 | +0.38% |
| 2026-07-16 | 0.854 | 0.8558 | 0.806 | 0.8193 | 3,743,406 | -4.95% |
| 2026-07-15 | 0.8727 | 0.896 | 0.86 | 0.862 | 2,255,407 | -0.48% |
| 2026-07-14 | 0.87 | 0.9 | 0.861 | 0.8662 | 1,213,247 | -0.36% |
| 2026-07-13 | 0.88 | 0.8828 | 0.85 | 0.8693 | 3,532,949 | -1.52% |
| 2026-07-10 | 0.9464 | 0.9544 | 0.882 | 0.8827 | 2,906,641 | -8.28% |
| 2026-07-09 | 0.91 | 0.9698 | 0.902 | 0.9624 | 2,575,863 | +5.45% |
| 2026-07-08 | 0.8855 | 0.93 | 0.8855 | 0.9127 | 3,422,649 | -0.74% |
| 2026-07-07 | 0.9369 | 0.9478 | 0.901 | 0.9195 | 3,710,303 | -3.38% |
| 2026-07-06 | 0.928 | 0.9799 | 0.9275 | 0.9517 | 2,626,554 | +2.29% |
| 2026-07-02 | 0.9257 | 1.01 | 0.9202 | 0.9304 | 6,037,313 | +0.68% |
| 2026-07-01 | 0.88 | 0.964 | 0.8792 | 0.9241 | 5,506,506 | +4.42% |
| 2026-06-30 | 0.88 | 0.9166 | 0.87 | 0.885 | 3,187,245 | -0.44% |
| 2026-06-29 | 0.8587 | 0.9139 | 0.85 | 0.8889 | 3,989,704 | +3.99% |
| 2026-06-26 | 0.8377 | 0.8898 | 0.7951 | 0.8548 | 18,909,693 | -0.29% |
| 2026-06-25 | 0.85 | 0.8873 | 0.7802 | 0.8573 | 8,412,380 | +3.64% |
| 2026-06-24 | 0.9 | 0.918 | 0.8251 | 0.8272 | 5,134,233 | -6.00% |
| 2026-06-23 | 0.91 | 0.93 | 0.88 | 0.88 | 5,546,420 | -4.47% |
| 2026-06-22 | 1 | 1.07 | 0.9208 | 0.9212 | 5,934,924 | -7.79% |
| 2026-06-18 | 0.9638 | 1.03 | 0.96 | 0.999 | 6,343,780 | +5.79% |
| 2026-06-17 | 0.97 | 0.996 | 0.9312 | 0.9443 | 3,473,136 | -1.02% |
| 2026-06-16 | 0.995 | 0.995 | 0.94 | 0.954 | 3,727,901 | -3.49% |
| 2026-06-15 | 1.01 | 1.05 | 0.9821 | 0.9885 | 9,422,150 | +4.42% |
| 2026-06-12 | 0.9849 | 1.01 | 0.9332 | 0.9467 | 3,328,009 | -2.70% |
| 2026-06-11 | 0.946 | 0.9847 | 0.915 | 0.973 | 3,444,732 | +2.80% |
| 2026-06-10 | 0.9751 | 1.02 | 0.9464 | 0.9465 | 3,451,896 | -4.11% |
| 2026-06-09 | 1.06 | 1.08 | 0.94 | 0.9871 | 8,116,899 | -6.88% |
| 2026-06-08 | 1.09 | 1.095 | 1.03 | 1.06 | 4,310,428 | +0.95% |
| 2026-06-05 | 1.25 | 1.25 | 1.01 | 1.05 | 8,905,019 | -17.97% |
| 2026-06-04 | 1.19 | 1.3 | 1.174 | 1.28 | 9,559,236 | +7.56% |
| 2026-06-03 | 1.22 | 1.22 | 1.16 | 1.19 | 7,952,203 | -4.03% |
| 2026-06-02 | 1.17 | 1.26 | 1.16 | 1.24 | 7,380,077 | +5.08% |
| 2026-06-01 | 1.17 | 1.25 | 1.12 | 1.18 | 7,407,284 | -0.84% |
| 2026-05-29 | 1.205 | 1.21 | 1.11 | 1.19 | 7,289,734 | -0.83% |
| 2026-05-28 | 1.11 | 1.21 | 1.084 | 1.2 | 7,411,582 | +6.19% |
| 2026-05-27 | 1.06 | 1.185 | 1.03 | 1.13 | 8,573,709 | +4.63% |
| 2026-05-26 | 1.08 | 1.09 | 1.01 | 1.08 | 7,550,891 | +1.89% |
| 2026-05-22 | 0.9994 | 1.09 | 0.9955 | 1.06 | 8,816,195 | +7.07% |
| 2026-05-21 | 0.87 | 0.99 | 0.867 | 0.99 | 11,368,930 | +13.05% |
| 2026-05-20 | 0.872 | 0.88 | 0.8406 | 0.8757 | 4,706,237 | +1.71% |
| 2026-05-19 | 0.85 | 0.8665 | 0.821 | 0.861 | 3,116,017 | +0.83% |
| 2026-05-18 | 0.8955 | 0.8955 | 0.8268 | 0.8539 | 4,577,467 | -4.07% |
| 2026-05-15 | 0.9054 | 0.9111 | 0.882 | 0.8901 | 3,706,076 | -4.59% |
| 2026-05-14 | 0.9333 | 0.96 | 0.905 | 0.9329 | 4,436,223 | +0.38% |
| 2026-05-13 | 0.93 | 0.9584 | 0.9022 | 0.9294 | 4,868,987 | -1.60% |