QSI | Quantum-Si-A | Historical Data

S&P 500$7,520.93
-0.38%
2m
DOW 30$52,231.89
-0.30%
2m
NASDAQ 100$27,740.79
-0.60%
2m
Russell 2000$280.58
-0.68%
2m
Russell 1000$410.85
-0.36%
2m
S&P 400$3,700.81
-0.39%
2m
S&P 600$1,716.22
-0.36%
2m

Quantum-Si-A (QSI)

NASDAQ

$1.23-$0.05 (-3.83%)

Price as of Nov 11, 2026 7:55 PM EST

$255.8M
Market Cap
-18.99%
1-Year Change
Medical Devices
Industry

1 Month
-16.34%

Low Price$1.09

High Price$1.75
3 Months
+62.00%

Low Price$0.72

High Price$1.75
1 Year
-18.99%

Low Price$0.70

High Price$1.75

From

Show

Frequency

Date	Open	High	Low	Close	Change (%)	Volume
11/10/2026	1.33	1.39	1.24	1.28	-6.57%	5,463,866
11/09/2026	1.37	1.38	1.30	1.37	+3.01%	5,626,578
11/06/2026	1.18	1.45	1.18	1.33	+13.68%	8,224,124
11/05/2026	1.27	1.28	1.08	1.17	-9.30%	6,889,112
11/05/2026	-$0.10 Earnings
11/04/2026	1.31	1.33	1.21	1.29	-0.77%	6,354,852
11/03/2026	1.27	1.34	1.24	1.30	+3.17%	4,600,114
11/02/2026	1.49	1.50	1.23	1.26	-13.70%	8,200,835
10/30/2026	1.57	1.60	1.41	1.46	-16.57%	9,905,915
10/29/2026	1.68	1.81	1.66	1.75	+1.74%	8,841,398
10/28/2026	1.63	1.73	1.59	1.72	+4.24%	10,048,279
10/27/2026	1.50	1.75	1.50	1.65	+13.01%	16,529,703
10/26/2026	1.43	1.48	1.36	1.46	+4.29%	10,346,556
10/23/2026	1.16	1.42	1.15	1.40	+21.74%	11,461,196
10/22/2026	1.17	1.21	1.15	1.15	-6.50%	3,572,179
10/21/2026	1.16	1.23	1.16	1.23	+6.03%	3,422,744
10/20/2026	1.06	1.20	1.04	1.16	+6.42%	6,160,805
10/19/2026	1.15	1.15	1.01	1.09	-2.68%	8,691,379
10/16/2026	1.33	1.33	1.10	1.12	-14.50%	7,690,617
10/15/2026	1.35	1.39	1.24	1.31	-5.76%	9,269,416
10/14/2026	1.34	1.44	1.33	1.39	-1.42%	5,364,923
10/13/2026	1.35	1.46	1.31	1.41	+3.68%	6,239,642
10/12/2026	1.48	1.48	1.34	1.36	-11.11%	10,356,374
10/09/2026	1.26	1.66	1.26	1.53	+25.41%	40,903,937
10/08/2026	1.29	1.30	1.20	1.22	-4.69%	5,851,471
10/07/2026	1.17	1.31	1.09	1.28	+4.92%	8,036,980
10/06/2026	1.29	1.41	1.19	1.22	-4.69%	8,703,208
10/05/2026	1.53	1.53	1.26	1.28	-17.42%	19,184,998
10/02/2026	1.39	1.55	1.17	1.55	+8.39%	18,774,124
10/01/2026	1.20	1.48	1.15	1.43	+33.64%	33,062,747
09/30/2026	0.96	1.12	0.96	1.07	+11.68%	13,838,833
09/29/2026	0.81	1.03	0.81	0.96	+20.52%	23,007,057
09/28/2026	0.83	0.83	0.80	0.80	-4.71%	1,567,026
09/25/2026	0.79	0.84	0.78	0.83	+6.28%	2,593,482
09/24/2026	0.75	0.80	0.74	0.79	+3.47%	1,593,305
09/23/2026	0.79	0.81	0.75	0.76	-3.31%	1,476,524
09/22/2026	0.76	0.79	0.75	0.78	+3.81%	2,417,540
09/21/2026	0.76	0.77	0.75	0.76	+1.45%	1,126,539
09/18/2026	0.79	0.80	0.74	0.75	-3.23%	1,701,347
09/17/2026	0.75	0.80	0.75	0.77	+5.47%	2,824,983
09/16/2026	0.72	0.75	0.72	0.73	+1.40%	915,220
09/15/2026	0.72	0.74	0.72	0.72	-0.69%	1,166,814
09/14/2026	0.73	0.75	0.72	0.73	-2.03%	1,390,457
09/11/2026	0.74	0.76	0.74	0.74	+0.12%	1,074,254
09/10/2026	0.75	0.76	0.73	0.74	-1.45%	1,715,325
09/09/2026	0.76	0.77	0.75	0.75	-1.32%	1,449,017
09/08/2026	0.77	0.79	0.76	0.76	-0.78%	1,053,670
09/04/2026	0.76	0.77	0.76	0.77	+0.66%	898,780
09/03/2026	0.77	0.79	0.76	0.76	0.00%	979,996
09/02/2026	0.76	0.79	0.75	0.76	+0.49%	1,619,343
09/01/2026	0.75	0.78	0.75	0.76	-1.12%	1,504,027
08/31/2026	0.78	0.78	0.76	0.77	-1.81%	1,130,895
08/28/2026	0.82	0.82	0.77	0.78	-2.88%	2,417,639
08/27/2026	0.79	0.83	0.79	0.80	+1.58%	1,375,317
08/26/2026	0.85	0.86	0.79	0.79	-6.69%	2,662,728
08/25/2026	0.79	0.86	0.78	0.85	+10.14%	4,371,714
08/24/2026	0.80	0.83	0.75	0.77	-7.87%	3,853,818
08/21/2026	0.78	0.93	0.78	0.84	+7.05%	7,825,142
08/20/2026	0.77	0.81	0.77	0.78	+1.29%	3,233,617
08/19/2026	0.72	0.78	0.72	0.77	+5.78%	2,855,864
08/18/2026	0.73	0.74	0.72	0.73	-2.18%	1,520,320
08/17/2026	0.74	0.80	0.74	0.74	+0.59%	2,429,723
08/14/2026	0.75	0.77	0.71	0.74	-6.35%	6,999,480
08/13/2026	0.86	0.91	0.79	0.79	-5.66%	4,378,334
08/13/2026	-$0.11 Earnings
08/12/2026	0.83	0.87	0.83	0.84	+2.10%	1,499,136
08/11/2026	0.80	0.85	0.80	0.82	+3.81%	2,056,311
08/10/2026	0.82	0.84	0.79	0.79	-2.98%	2,434,391
08/07/2026	0.76	0.83	0.76	0.81	+7.87%	2,730,130
08/06/2026	0.75	0.78	0.75	0.76	-0.20%	1,493,531
08/05/2026	0.78	0.79	0.76	0.76	-1.16%	2,484,838
08/04/2026	0.76	0.80	0.76	0.77	+2.60%	3,986,331
08/03/2026	0.72	0.76	0.71	0.75	+4.72%	2,706,253
07/31/2026	0.73	0.75	0.71	0.71	-1.06%	1,840,507
07/30/2026	0.73	0.74	0.69	0.72	+2.52%	3,557,133
07/29/2026	0.76	0.78	0.70	0.70	-7.67%	4,102,774
07/28/2026	0.78	0.78	0.74	0.76	-2.91%	3,268,923
07/27/2026	0.79	0.81	0.77	0.78	+1.73%	1,086,514
07/24/2026	0.79	0.80	0.76	0.77	-2.52%	2,588,776
07/23/2026	0.79	0.83	0.78	0.79	-1.25%	3,288,670
07/22/2026	0.81	0.85	0.80	0.80	-4.31%	2,843,612
07/21/2026	0.82	0.85	0.82	0.84	+2.33%	1,470,894
07/20/2026	0.83	0.84	0.81	0.82	-0.66%	1,502,239
07/17/2026	0.82	0.85	0.80	0.82	+0.38%	2,295,009
07/16/2026	0.85	0.86	0.81	0.82	-4.95%	3,743,406
07/15/2026	0.87	0.90	0.86	0.86	-0.48%	2,254,275
07/14/2026	0.87	0.90	0.86	0.87	-0.36%	1,202,686
07/13/2026	0.88	0.88	0.85	0.87	-1.52%	3,532,949
07/10/2026	0.95	0.95	0.88	0.88	-8.28%	2,906,541
07/09/2026	0.91	0.97	0.90	0.96	+5.45%	2,575,863
07/08/2026	0.89	0.93	0.89	0.91	-0.74%	3,421,649
07/07/2026	0.94	0.95	0.90	0.92	-3.38%	3,710,303
07/06/2026	0.93	0.98	0.93	0.95	+2.29%	2,626,554
07/02/2026	0.93	1.01	0.92	0.93	+0.68%	6,037,313
07/01/2026	0.88	0.96	0.88	0.92	+4.42%	5,506,506
06/30/2026	0.88	0.92	0.87	0.89	-0.44%	3,187,245
06/29/2026	0.86	0.91	0.85	0.89	+3.99%	3,989,604
06/26/2026	0.84	0.89	0.80	0.85	-0.29%	18,909,693
06/25/2026	0.85	0.89	0.78	0.86	+3.64%	8,412,380
06/24/2026	0.90	0.92	0.83	0.83	-6.00%	5,134,223