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Quantum-Si incorporated (QSI)
NASDAQ: QSI · Real-Time Price · USD
0.926
+0.064 (7.44%)
At close: Mar 9, 2026, 4:00 PM EDT
0.937
+0.011 (1.19%)
After-hours: Mar 9, 2026, 7:59 PM EDT

Quantum-Si incorporated Stock Price History

Historical Data

DateOpenHighLowCloseAdj. CloseChangeVolume
Mar 9, 20260.880.930.850.930.937.44%4,865,887
Mar 6, 20260.890.900.840.860.86-5.24%5,626,389
Mar 5, 20260.900.970.890.910.91-0.05%4,158,510
Mar 4, 20260.950.980.910.910.91-4.01%2,873,100
Mar 3, 20260.920.970.900.950.951.56%3,000,391
Mar 2, 20260.930.960.910.930.93-2.40%1,797,558
Feb 27, 20260.981.000.950.960.96-5.31%2,566,672
Feb 26, 20261.011.030.971.011.012.01%2,249,643
Feb 25, 20260.951.020.930.990.996.44%3,103,335
Feb 24, 20260.910.950.910.930.932.01%1,348,225
Feb 23, 20260.940.950.900.910.91-3.07%1,888,673
Feb 20, 20260.960.960.930.940.94-2.07%1,739,432
Feb 19, 20260.900.980.890.960.965.99%3,983,365
Feb 18, 20260.960.980.900.910.91-3.45%4,899,185
Feb 17, 20260.990.990.940.940.94-5.23%3,529,981
Feb 13, 20260.991.050.990.990.991.59%3,089,288
Feb 12, 20261.051.060.960.980.98-6.24%5,847,448
Feb 11, 20261.121.121.011.041.04-5.45%4,038,842
Feb 10, 20261.101.111.061.101.102.80%3,593,026
Feb 9, 20261.091.091.021.071.070.47%3,105,765
Feb 6, 20261.021.090.961.071.0714.26%7,381,004
Feb 5, 20261.031.040.920.930.93-9.50%8,117,180
Feb 4, 20261.101.111.001.031.03-5.50%6,304,086
Feb 3, 20261.111.131.051.091.09-0.91%5,027,494
Feb 2, 20261.111.131.091.101.10-2.65%3,741,410
Jan 30, 20261.161.191.111.131.13-3.42%5,411,907
Jan 29, 20261.201.211.131.171.17-2.50%6,121,144
Jan 28, 20261.231.241.171.201.20-2.44%3,851,182
Jan 27, 20261.221.261.201.231.231.65%2,801,259
Jan 26, 20261.251.271.211.211.21-3.20%3,088,906
Jan 23, 20261.311.321.241.251.25-4.58%4,036,112
Jan 22, 20261.231.331.221.311.316.50%6,352,030
Jan 21, 20261.201.241.141.231.233.36%4,896,116
Jan 20, 20261.211.241.181.191.19-6.30%5,641,105
Jan 16, 20261.251.321.231.271.273.25%5,377,801
Jan 15, 20261.291.301.231.231.23-3.15%3,656,506
Jan 14, 20261.271.311.241.271.27-4,337,857
Jan 13, 20261.251.321.201.271.274.96%5,510,845
Jan 12, 20261.211.251.181.211.21-0.82%4,684,250
Jan 9, 20261.271.281.211.221.22-2.40%4,421,206
Jan 8, 20261.251.311.241.251.25-0.79%4,893,077
Jan 7, 20261.291.321.261.261.26-1.56%4,107,769
Jan 6, 20261.261.341.261.281.281.59%7,655,044
Jan 5, 20261.191.311.191.261.268.62%8,340,539
Jan 2, 20261.151.161.111.161.165.45%4,871,648
Dec 31, 20251.111.151.071.101.10-0.90%5,902,294
Dec 30, 20251.161.171.101.111.11-5.93%7,955,380
Dec 29, 20251.211.261.171.181.18-4.07%8,021,451
Dec 26, 20251.311.311.221.231.23-6.11%4,175,380
Dec 24, 20251.241.331.241.311.316.50%4,344,521
Dec 23, 20251.251.261.201.231.23-3.15%4,209,448
Dec 22, 20251.281.321.251.271.27-5,156,059
Dec 19, 20251.221.291.211.271.274.10%6,700,084
Dec 18, 20251.241.311.211.221.221.67%3,418,947
Dec 17, 20251.241.281.201.201.20-1.64%3,826,984
Dec 16, 20251.211.261.181.221.22-0.81%4,898,602
Dec 15, 20251.311.321.221.231.23-4.65%4,129,140
Dec 12, 20251.401.431.291.291.29-7.86%5,641,030
Dec 11, 20251.441.441.351.401.40-2.78%4,342,003
Dec 10, 20251.421.451.391.441.441.41%3,567,291
Dec 9, 20251.441.461.391.421.42-2.07%3,710,382
Dec 8, 20251.471.541.411.451.450.69%3,170,964
Dec 5, 20251.481.491.411.441.44-2.04%3,673,275
Dec 4, 20251.341.491.341.471.478.09%5,885,608
Dec 3, 20251.281.361.261.361.367.09%4,068,880
Dec 2, 20251.301.341.271.271.27-1.55%3,326,862
Dec 1, 20251.361.361.281.291.29-8.51%3,490,419
Nov 28, 20251.361.431.361.411.414.44%2,455,624
Nov 26, 20251.361.391.311.351.35-4,590,912
Nov 25, 20251.361.371.291.351.35-3,544,906
Nov 24, 20251.271.351.261.351.356.30%4,733,966
Nov 21, 20251.221.281.191.271.272.42%5,215,927
Nov 20, 20251.371.401.231.241.24-3.13%6,779,598
Nov 19, 20251.271.381.251.281.280.79%5,939,770
Nov 18, 20251.281.351.231.271.27-2.31%5,006,762
Nov 17, 20251.371.411.261.301.30-5.11%4,656,763
Nov 14, 20251.271.451.271.371.37-1.44%7,297,913
Nov 13, 20251.501.521.381.391.39-8.55%7,063,552
Nov 12, 20251.581.621.521.521.52-3.80%5,462,113
Nov 11, 20251.591.651.551.581.58-0.94%4,498,553
Nov 10, 20251.731.741.591.601.601.27%5,590,422
Nov 7, 20251.551.621.461.581.58-4.55%9,690,597
Nov 6, 20251.771.771.591.651.65-8.33%9,785,114
Nov 5, 20251.851.891.771.801.80-2.17%8,577,197
Nov 4, 20251.861.951.821.841.84-8.00%7,175,474
Nov 3, 20252.152.191.952.002.00-6.98%9,521,727
Oct 31, 20252.042.162.032.152.155.91%6,172,895
Oct 30, 20252.052.122.022.032.03-5.14%6,739,675
Oct 29, 20252.142.232.092.142.14-1.83%7,171,252
Oct 28, 20252.312.322.142.182.18-6.84%9,163,726
Oct 27, 20252.382.422.222.342.342.18%10,282,659
Oct 24, 20252.322.442.262.292.294.09%11,745,557
Oct 23, 20252.382.382.172.202.20-12,164,767
Oct 22, 20252.222.342.002.202.20-5.98%18,410,361
Oct 21, 20252.482.522.272.342.34-9.48%15,333,668
Oct 20, 20252.422.732.392.592.5913.38%22,176,467
Oct 17, 20252.382.532.262.282.28-10.24%20,988,672
Oct 16, 20252.813.102.502.542.54-3.42%49,550,529
Oct 15, 20252.452.752.362.632.6322.33%53,572,323
Oct 14, 20252.012.261.962.152.153.37%23,794,582