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US · QSI

Quantum-Si incorporated

Programmatic access: InvestorsCraft Valuation API · catalog

Sector
Healthcare · Biotechnology
Headquarters
Branford, CT 06405

Price · as of 2026-09-04

$0.77

Market cap 161.11M

Price history

Weekly OHLC price history for QSI, USD per share
WeekOpenHighLowCloseVolume
Nov 9, 2020 – Nov 13, 2020$9.88$9.88$9.88$9.88
Nov 16, 2020 – Nov 20, 2020$9.90$9.90$9.88$9.900
Nov 23, 2020 – Nov 27, 2020$9.90$9.90$9.90$9.900
Nov 30, 2020 – Dec 4, 2020$10.88$11.88$9.95$11.500
Dec 7, 2020 – Dec 11, 2020$10.89$10.89$10.01$10.150
Dec 14, 2020 – Dec 18, 2020$10.23$10.23$9.93$10.000
Dec 21, 2020 – Dec 24, 2020$10.02$10.25$9.95$10.180
Dec 28, 2020 – Dec 31, 2020$10.25$10.88$10.13$10.150
Jan 4, 2021 – Jan 8, 2021$10.06$10.72$10.06$10.270
Jan 11, 2021 – Jan 15, 2021$10.50$10.64$10.18$10.320
Jan 18, 2021 – Jan 22, 2021$10.36$10.80$10.26$10.430
Jan 25, 2021 – Jan 29, 2021$10.40$10.85$10.05$10.220
Feb 1, 2021 – Feb 5, 2021$10.28$10.65$10.24$10.300
Feb 8, 2021 – Feb 12, 2021$10.37$10.48$10.14$10.310
Feb 15, 2021 – Feb 19, 2021$10.40$25.00$10.30$20.490
Feb 22, 2021 – Feb 26, 2021$20.13$21.40$13.56$14.320
Mar 1, 2021 – Mar 5, 2021$15.28$15.28$10.95$13.210
Mar 8, 2021 – Mar 12, 2021$12.67$14.10$11.80$13.960
Mar 15, 2021 – Mar 19, 2021$13.70$14.70$11.81$12.800
Mar 22, 2021 – Mar 26, 2021$13.05$13.40$10.77$12.300
Mar 29, 2021 – Apr 1, 2021$12.30$13.00$11.31$12.650
Apr 5, 2021 – Apr 9, 2021$13.18$13.23$11.34$11.720
Apr 12, 2021 – Apr 16, 2021$11.70$11.77$10.51$10.590
Apr 19, 2021 – Apr 23, 2021$10.51$10.85$10.06$10.440
Apr 26, 2021 – Apr 30, 2021$10.58$10.65$10.23$10.390
May 3, 2021 – May 7, 2021$10.42$10.46$10.16$10.400
May 10, 2021 – May 14, 2021$10.32$10.50$9.85$10.080
May 17, 2021 – May 21, 2021$10.02$10.18$9.95$9.960
May 24, 2021 – May 28, 2021$9.99$10.29$9.95$10.260
May 31, 2021 – Jun 4, 2021$10.38$10.38$9.95$9.990
Jun 7, 2021 – Jun 11, 2021$10.00$10.85$9.34$9.750
Jun 14, 2021 – Jun 18, 2021$9.88$9.98$7.85$9.220
Jun 21, 2021 – Jun 25, 2021$9.26$11.88$9.10$11.520
Jun 28, 2021 – Jul 2, 2021$12.00$13.13$11.60$12.540
Jul 5, 2021 – Jul 9, 2021$12.79$13.60$10.86$13.560
Jul 12, 2021 – Jul 16, 2021$14.03$14.17$10.92$11.090
Jul 19, 2021 – Jul 23, 2021$10.79$12.95$10.76$12.100
Jul 26, 2021 – Jul 30, 2021$12.20$12.59$9.42$9.420
Aug 2, 2021 – Aug 6, 2021$9.94$9.94$8.52$8.720
Aug 9, 2021 – Aug 13, 2021$8.78$9.17$7.93$7.970
Aug 16, 2021 – Aug 20, 2021$8.08$8.87$7.43$8.320
Aug 23, 2021 – Aug 27, 2021$8.40$9.94$8.32$9.680
Aug 30, 2021 – Sep 3, 2021$9.89$10.15$9.28$9.530
Sep 6, 2021 – Sep 10, 2021$9.52$9.71$8.44$9.000
Sep 13, 2021 – Sep 17, 2021$8.95$9.27$8.51$8.800
Sep 20, 2021 – Sep 24, 2021$8.46$9.37$8.30$8.810
Sep 27, 2021 – Oct 1, 2021$8.84$9.33$8.07$8.430
Oct 4, 2021 – Oct 8, 2021$8.43$8.54$7.95$8.330
Oct 11, 2021 – Oct 15, 2021$8.26$9.07$8.13$8.600
Oct 18, 2021 – Oct 22, 2021$8.53$9.10$8.08$8.100
Oct 25, 2021 – Oct 29, 2021$8.11$8.35$7.74$8.060
Nov 1, 2021 – Nov 5, 2021$8.09$8.52$7.80$7.900
Nov 8, 2021 – Nov 12, 2021$7.96$8.36$7.61$8.170
Nov 15, 2021 – Nov 19, 2021$8.23$8.23$7.51$7.580
Nov 22, 2021 – Nov 26, 2021$7.61$7.65$6.28$6.590
Nov 29, 2021 – Dec 3, 2021$6.72$6.77$5.57$5.750
Dec 6, 2021 – Dec 10, 2021$5.71$6.79$5.33$6.110
Dec 13, 2021 – Dec 17, 2021$6.05$6.45$5.70$6.240
Dec 20, 2021 – Dec 23, 2021$6.18$8.44$6.07$8.160
Dec 27, 2021 – Dec 31, 2021$8.15$8.31$7.18$7.870
Jan 3, 2022 – Jan 7, 2022$8.06$8.31$6.37$6.450
Jan 10, 2022 – Jan 14, 2022$6.37$6.45$5.63$5.840
Jan 17, 2022 – Jan 21, 2022$5.72$5.95$5.01$5.400
Jan 24, 2022 – Jan 28, 2022$5.17$5.75$4.36$4.520
Jan 31, 2022 – Feb 4, 2022$4.54$4.89$4.22$4.430
Feb 7, 2022 – Feb 11, 2022$4.45$5.00$4.16$4.460
Feb 14, 2022 – Feb 18, 2022$4.45$4.68$3.79$4.410
Feb 21, 2022 – Feb 25, 2022$4.23$4.57$3.93$4.420
Feb 28, 2022 – Mar 4, 2022$4.46$5.00$3.94$4.000
Mar 7, 2022 – Mar 11, 2022$3.99$4.66$3.94$4.100
Mar 14, 2022 – Mar 18, 2022$4.06$5.06$3.72$4.930
Mar 21, 2022 – Mar 25, 2022$4.87$5.16$4.42$4.670
Mar 28, 2022 – Apr 1, 2022$4.65$5.42$4.35$4.900
Apr 4, 2022 – Apr 8, 2022$4.94$4.96$4.04$4.070
Apr 11, 2022 – Apr 14, 2022$4.04$4.48$3.92$4.230
Apr 18, 2022 – Apr 22, 2022$4.21$4.52$4.01$4.160
Apr 25, 2022 – Apr 29, 2022$4.13$4.58$4.10$4.380
May 2, 2022 – May 6, 2022$4.40$4.62$3.82$3.960
May 9, 2022 – May 13, 2022$3.70$3.89$2.86$3.600
May 16, 2022 – May 20, 2022$3.55$4.07$3.42$3.920
May 23, 2022 – May 27, 2022$3.93$4.25$3.79$4.240
May 30, 2022 – Jun 3, 2022$4.24$4.64$4.13$4.380
Jun 6, 2022 – Jun 10, 2022$4.50$4.65$3.38$3.430
Jun 13, 2022 – Jun 17, 2022$3.32$3.45$2.84$2.950
Jun 20, 2022 – Jun 24, 2022$3.00$3.12$2.69$2.890
Jun 27, 2022 – Jul 1, 2022$2.89$2.95$2.22$2.400
Jul 4, 2022 – Jul 8, 2022$2.35$2.99$2.31$2.920
Jul 11, 2022 – Jul 15, 2022$2.90$2.96$2.62$2.890
Jul 18, 2022 – Jul 22, 2022$2.92$3.52$2.76$3.030
Jul 25, 2022 – Jul 29, 2022$3.01$3.30$2.85$3.250
Aug 1, 2022 – Aug 5, 2022$3.21$3.82$3.14$3.820
Aug 8, 2022 – Aug 12, 2022$3.81$4.43$3.54$4.190
Aug 15, 2022 – Aug 19, 2022$4.15$4.41$3.50$3.530
Aug 22, 2022 – Aug 26, 2022$3.42$3.54$3.20$3.220
Aug 29, 2022 – Sep 2, 2022$3.12$3.33$2.99$3.060
Sep 5, 2022 – Sep 9, 2022$3.10$3.42$2.97$3.300
Sep 12, 2022 – Sep 16, 2022$3.30$3.51$2.83$2.930
Sep 19, 2022 – Sep 23, 2022$2.85$3.02$2.57$2.650
Sep 26, 2022 – Sep 30, 2022$2.64$2.91$2.55$2.750
Oct 3, 2022 – Oct 7, 2022$2.77$3.61$2.64$2.850
Oct 10, 2022 – Oct 14, 2022$2.81$2.88$2.53$2.620
Oct 17, 2022 – Oct 21, 2022$2.69$2.97$2.45$2.650
Oct 24, 2022 – Oct 28, 2022$2.68$3.17$2.58$3.070
Oct 31, 2022 – Nov 4, 2022$3.06$3.11$2.25$2.500
Nov 7, 2022 – Nov 11, 2022$2.50$3.34$2.31$3.170
Nov 14, 2022 – Nov 18, 2022$3.15$3.35$2.92$3.020
Nov 21, 2022 – Nov 25, 2022$3.00$3.00$2.55$2.700
Nov 28, 2022 – Dec 2, 2022$2.69$2.76$2.26$2.490
Dec 5, 2022 – Dec 9, 2022$2.44$2.47$2.23$2.240
Dec 12, 2022 – Dec 16, 2022$2.23$2.51$1.87$1.950
Dec 19, 2022 – Dec 23, 2022$1.98$2.14$1.82$2.070
Dec 26, 2022 – Dec 30, 2022$2.03$2.04$1.72$1.830
Jan 2, 2023 – Jan 6, 2023$1.84$2.04$1.64$1.720
Jan 9, 2023 – Jan 13, 2023$1.77$2.26$1.75$2.210
Jan 16, 2023 – Jan 20, 2023$2.21$2.49$2.13$2.250
Jan 23, 2023 – Jan 27, 2023$2.25$2.40$2.11$2.190
Jan 30, 2023 – Feb 3, 2023$2.21$2.64$2.10$2.450
Feb 6, 2023 – Feb 10, 2023$2.49$2.53$2.09$2.130
Feb 13, 2023 – Feb 17, 2023$2.10$2.19$1.97$2.030
Feb 20, 2023 – Feb 24, 2023$2.02$2.03$1.81$1.840
Feb 27, 2023 – Mar 3, 2023$1.87$2.22$1.73$2.160
Mar 6, 2023 – Mar 10, 2023$2.14$2.14$1.58$1.590
Mar 13, 2023 – Mar 17, 2023$1.59$1.84$1.57$1.730
Mar 20, 2023 – Mar 24, 2023$1.76$1.78$1.54$1.600
Mar 27, 2023 – Mar 31, 2023$1.61$1.83$1.59$1.760
Apr 3, 2023 – Apr 6, 2023$1.75$1.78$1.51$1.580
Apr 10, 2023 – Apr 14, 2023$1.58$1.64$1.47$1.520
Apr 17, 2023 – Apr 21, 2023$1.49$1.64$1.48$1.600
Apr 24, 2023 – Apr 28, 2023$1.62$1.69$1.39$1.470
May 1, 2023 – May 5, 2023$1.48$1.52$1.38$1.450
May 8, 2023 – May 12, 2023$1.49$1.65$1.40$1.410
May 15, 2023 – May 19, 2023$1.41$1.58$1.36$1.520
May 22, 2023 – May 26, 2023$1.55$1.94$1.54$1.630
May 29, 2023 – Jun 2, 2023$1.68$1.70$1.46$1.690
Jun 5, 2023 – Jun 9, 2023$1.68$1.91$1.58$1.600
Jun 12, 2023 – Jun 16, 2023$1.60$1.78$1.45$1.460
Jun 19, 2023 – Jun 23, 2023$1.46$1.60$1.38$1.550
Jun 26, 2023 – Jun 30, 2023$1.54$1.82$1.47$1.790
Jul 3, 2023 – Jul 7, 2023$1.79$2.12$1.77$2.050
Jul 10, 2023 – Jul 14, 2023$2.04$2.91$2.02$2.420
Jul 17, 2023 – Jul 21, 2023$2.55$3.86$2.37$2.990
Jul 24, 2023 – Jul 28, 2023$3.09$3.50$2.94$3.450
Jul 31, 2023 – Aug 4, 2023$3.46$3.90$3.30$3.390
Aug 7, 2023 – Aug 11, 2023$2.72$2.79$2.01$2.210
Aug 14, 2023 – Aug 18, 2023$2.16$2.18$1.86$1.970
Aug 21, 2023 – Aug 25, 2023$2.02$2.20$1.92$2.120
Aug 28, 2023 – Sep 1, 2023$2.20$2.46$2.07$2.370
Sep 4, 2023 – Sep 8, 2023$2.34$2.39$2.13$2.240
Sep 11, 2023 – Sep 15, 2023$2.20$2.47$2.17$2.240
Sep 18, 2023 – Sep 22, 2023$2.23$2.23$1.95$1.980
Sep 25, 2023 – Sep 29, 2023$1.89$1.90$1.57$1.660
Oct 2, 2023 – Oct 6, 2023$1.67$1.71$1.51$1.540
Oct 9, 2023 – Oct 13, 2023$1.53$1.55$1.33$1.340
Oct 16, 2023 – Oct 20, 2023$1.32$1.43$1.20$1.260
Oct 23, 2023 – Oct 27, 2023$1.26$1.39$1.13$1.150
Oct 30, 2023 – Nov 3, 2023$1.16$1.49$1.12$1.370
Nov 6, 2023 – Nov 10, 2023$1.39$1.47$1.21$1.420
Nov 13, 2023 – Nov 17, 2023$1.41$1.83$1.34$1.650
Nov 20, 2023 – Nov 24, 2023$1.65$1.65$1.48$1.530
Nov 27, 2023 – Dec 1, 2023$1.55$1.76$1.42$1.740
Dec 4, 2023 – Dec 8, 2023$1.75$1.83$1.53$1.570
Dec 11, 2023 – Dec 15, 2023$1.55$1.85$1.48$1.700
Dec 18, 2023 – Dec 22, 2023$1.72$1.95$1.65$1.880
Dec 25, 2023 – Dec 29, 2023$1.92$2.31$1.86$2.010
Jan 1, 2024 – Jan 5, 2024$2.00$2.16$1.82$1.870
Jan 8, 2024 – Jan 12, 2024$1.89$2.06$1.71$1.730
Jan 15, 2024 – Jan 19, 2024$1.70$1.72$1.53$1.590
Jan 22, 2024 – Jan 26, 2024$1.63$1.89$1.60$1.650
Jan 29, 2024 – Feb 2, 2024$1.66$1.77$1.49$1.520
Feb 5, 2024 – Feb 9, 2024$1.55$1.58$1.38$1.540
Feb 12, 2024 – Feb 16, 2024$1.55$1.83$1.51$1.700
Feb 19, 2024 – Feb 23, 2024$1.65$1.69$1.53$1.560
Feb 26, 2024 – Mar 1, 2024$1.56$1.92$1.54$1.850
Mar 4, 2024 – Mar 8, 2024$1.86$2.43$1.54$2.230
Mar 11, 2024 – Mar 15, 2024$2.20$2.27$1.71$1.730
Mar 18, 2024 – Mar 22, 2024$1.80$2.01$1.75$1.790
Mar 25, 2024 – Mar 28, 2024$1.79$2.00$1.74$1.970
Apr 1, 2024 – Apr 5, 2024$1.99$1.99$1.73$1.820
Apr 8, 2024 – Apr 12, 2024$1.83$1.93$1.69$1.690
Apr 15, 2024 – Apr 19, 2024$1.75$1.76$1.48$1.570
Apr 22, 2024 – Apr 26, 2024$1.58$1.77$1.54$1.650
Apr 29, 2024 – May 3, 2024$1.65$1.99$1.61$1.840
May 6, 2024 – May 10, 2024$1.84$1.90$1.67$1.700
May 13, 2024 – May 17, 2024$1.69$1.98$1.67$1.800
May 20, 2024 – May 24, 2024$1.81$1.84$1.60$1.620
May 27, 2024 – May 31, 2024$1.61$1.65$1.50$1.520
Jun 3, 2024 – Jun 7, 2024$1.57$1.66$1.47$1.480
Jun 10, 2024 – Jun 14, 2024$1.48$1.60$1.35$1.370
Jun 17, 2024 – Jun 21, 2024$1.41$1.41$1.16$1.190
Jun 24, 2024 – Jun 28, 2024$1.20$1.25$0.73$1.050
Jul 1, 2024 – Jul 5, 2024$1.03$1.04$0.90$0.930
Jul 8, 2024 – Jul 12, 2024$0.95$1.15$0.88$1.070
Jul 15, 2024 – Jul 19, 2024$1.08$1.26$1.01$1.030
Jul 22, 2024 – Jul 26, 2024$1.05$1.23$1.03$1.110
Jul 29, 2024 – Aug 2, 2024$1.11$1.14$0.88$0.890
Aug 5, 2024 – Aug 9, 2024$0.79$0.91$0.79$0.890
Aug 12, 2024 – Aug 16, 2024$0.90$1.08$0.79$0.970
Aug 19, 2024 – Aug 23, 2024$0.98$1.04$0.93$1.010
Aug 26, 2024 – Aug 30, 2024$1.01$1.08$0.93$0.950
Sep 2, 2024 – Sep 6, 2024$0.96$0.97$0.87$0.910
Sep 9, 2024 – Sep 13, 2024$0.93$0.98$0.87$0.920
Sep 16, 2024 – Sep 20, 2024$0.90$1.10$0.90$0.980
Sep 23, 2024 – Sep 27, 2024$0.99$0.99$0.88$0.910
Sep 30, 2024 – Oct 4, 2024$0.93$0.94$0.82$0.880
Oct 7, 2024 – Oct 11, 2024$0.86$0.89$0.78$0.820
Oct 14, 2024 – Oct 18, 2024$0.82$0.86$0.77$0.820
Oct 21, 2024 – Oct 25, 2024$0.81$0.83$0.74$0.750
Oct 28, 2024 – Nov 1, 2024$0.74$0.80$0.70$0.770
Nov 4, 2024 – Nov 8, 2024$0.74$0.95$0.74$0.940
Nov 11, 2024 – Nov 15, 2024$0.95$1.01$0.73$0.730
Nov 18, 2024 – Nov 22, 2024$0.73$1.89$0.61$1.620
Nov 25, 2024 – Nov 29, 2024$1.68$1.77$1.08$1.250
Dec 2, 2024 – Dec 6, 2024$1.30$1.37$1.08$1.330
Dec 9, 2024 – Dec 13, 2024$1.41$2.58$1.40$1.720
Dec 16, 2024 – Dec 20, 2024$1.72$1.73$1.17$1.300
Dec 23, 2024 – Dec 27, 2024$1.35$4.14$1.23$3.600
Dec 30, 2024 – Jan 3, 2025$3.50$5.77$2.47$4.290
Jan 6, 2025 – Jan 10, 2025$4.02$4.63$2.30$2.650
Jan 13, 2025 – Jan 17, 2025$2.34$2.68$1.85$2.240
Jan 20, 2025 – Jan 24, 2025$2.30$2.58$2.24$2.300
Jan 27, 2025 – Jan 31, 2025$2.14$2.30$1.90$1.980
Feb 3, 2025 – Feb 7, 2025$1.80$2.25$1.75$2.040
Feb 10, 2025 – Feb 14, 2025$2.10$2.11$1.83$1.950
Feb 17, 2025 – Feb 21, 2025$2.00$2.10$1.71$1.710
Feb 24, 2025 – Feb 28, 2025$1.71$1.72$1.28$1.380
Mar 3, 2025 – Mar 7, 2025$1.47$1.48$1.15$1.290
Mar 10, 2025 – Mar 14, 2025$1.24$1.37$1.12$1.360
Mar 17, 2025 – Mar 21, 2025$1.64$1.76$1.36$1.460
Mar 24, 2025 – Mar 28, 2025$1.51$1.54$1.25$1.270
Mar 31, 2025 – Apr 4, 2025$1.21$1.25$1.03$1.130
Apr 7, 2025 – Apr 11, 2025$1.02$1.27$1.02$1.250
Apr 14, 2025 – Apr 17, 2025$1.30$1.31$1.11$1.150
Apr 21, 2025 – Apr 25, 2025$1.11$1.25$1.08$1.230
Apr 28, 2025 – May 2, 2025$1.22$1.28$1.10$1.260
May 5, 2025 – May 9, 2025$1.23$1.35$1.15$1.260
May 12, 2025 – May 16, 2025$1.32$1.60$1.32$1.480
May 19, 2025 – May 23, 2025$1.42$2.03$1.36$1.940
May 26, 2025 – May 30, 2025$2.09$2.15$1.59$1.680
Jun 2, 2025 – Jun 6, 2025$1.66$1.82$1.57$1.740
Jun 9, 2025 – Jun 13, 2025$1.77$1.90$1.64$1.660
Jun 16, 2025 – Jun 20, 2025$1.67$1.79$1.65$1.730
Jun 23, 2025 – Jun 27, 2025$1.68$2.14$1.55$1.950
Jun 30, 2025 – Jul 3, 2025$1.97$2.18$1.87$2.140
Jul 7, 2025 – Jul 11, 2025$1.92$1.95$1.72$1.730
Jul 14, 2025 – Jul 18, 2025$1.71$1.86$1.67$1.760
Jul 21, 2025 – Jul 25, 2025$1.78$1.99$1.68$1.930
Jul 28, 2025 – Aug 1, 2025$1.93$1.95$1.40$1.460
Aug 4, 2025 – Aug 8, 2025$1.49$1.49$1.26$1.270
Aug 11, 2025 – Aug 15, 2025$1.27$1.28$1.08$1.100
Aug 18, 2025 – Aug 22, 2025$1.11$1.16$0.95$1.140
Aug 25, 2025 – Aug 29, 2025$1.13$1.22$1.10$1.120
Sep 1, 2025 – Sep 5, 2025$1.10$1.13$1.03$1.080
Sep 8, 2025 – Sep 12, 2025$1.09$1.26$1.04$1.180
Sep 15, 2025 – Sep 19, 2025$1.20$1.64$1.18$1.500
Sep 22, 2025 – Sep 26, 2025$1.53$1.79$1.43$1.490
Sep 29, 2025 – Oct 3, 2025$1.40$1.76$1.35$1.720
Oct 6, 2025 – Oct 10, 2025$1.71$1.95$1.66$1.670
Oct 13, 2025 – Oct 17, 2025$1.75$3.10$1.73$2.280
Oct 20, 2025 – Oct 24, 2025$2.42$2.73$2.00$2.290
Oct 27, 2025 – Oct 31, 2025$2.38$2.42$2.02$2.150
Nov 3, 2025 – Nov 7, 2025$2.15$2.19$1.46$1.580
Nov 10, 2025 – Nov 14, 2025$1.73$1.74$1.27$1.370
Nov 17, 2025 – Nov 21, 2025$1.37$1.41$1.19$1.270
Nov 24, 2025 – Nov 28, 2025$1.27$1.43$1.26$1.410
Dec 1, 2025 – Dec 5, 2025$1.36$1.49$1.26$1.440
Dec 8, 2025 – Dec 12, 2025$1.47$1.54$1.29$1.290
Dec 15, 2025 – Dec 19, 2025$1.31$1.32$1.18$1.270
Dec 22, 2025 – Dec 26, 2025$1.28$1.33$1.20$1.230
Dec 29, 2025 – Jan 2, 2026$1.21$1.26$1.07$1.160
Jan 5, 2026 – Jan 9, 2026$1.19$1.34$1.19$1.220
Jan 12, 2026 – Jan 16, 2026$1.21$1.32$1.18$1.270
Jan 19, 2026 – Jan 23, 2026$1.21$1.33$1.14$1.250
Jan 26, 2026 – Jan 30, 2026$1.25$1.27$1.11$1.130
Feb 2, 2026 – Feb 6, 2026$1.11$1.13$0.92$1.070
Feb 9, 2026 – Feb 13, 2026$1.09$1.12$0.96$0.990
Feb 16, 2026 – Feb 20, 2026$0.99$0.99$0.89$0.940
Feb 23, 2026 – Feb 27, 2026$0.94$1.02$0.90$0.960
Mar 2, 2026 – Mar 6, 2026$0.93$0.98$0.84$0.860
Mar 9, 2026 – Mar 13, 2026$0.88$1.10$0.85$0.950
Mar 16, 2026 – Mar 20, 2026$0.96$0.98$0.83$0.850
Mar 23, 2026 – Mar 27, 2026$0.85$0.91$0.76$0.760
Mar 30, 2026 – Apr 2, 2026$0.76$0.80$0.72$0.750
Apr 6, 2026 – Apr 10, 2026$0.74$0.78$0.69$0.740
Apr 13, 2026 – Apr 17, 2026$0.74$1.14$0.72$1.070
Apr 20, 2026 – Apr 24, 2026$1.02$1.07$0.90$0.910
Apr 27, 2026 – May 1, 2026$0.91$1.02$0.86$0.960
May 4, 2026 – May 8, 2026$0.95$1.04$0.88$0.910
May 11, 2026 – May 15, 2026$0.90$1.03$0.88$0.890
May 18, 2026 – May 22, 2026$0.90$1.09$0.82$1.060
May 25, 2026 – May 29, 2026$1.08$1.21$1.01$1.190
Jun 1, 2026 – Jun 5, 2026$1.17$1.30$1.01$1.050
Jun 8, 2026 – Jun 12, 2026$1.09$1.10$0.92$0.950
Jun 15, 2026 – Jun 18, 2026$1.01$1.05$0.93$1.000
Jun 22, 2026 – Jun 26, 2026$1.00$1.07$0.78$0.850
Jun 29, 2026 – Jul 2, 2026$0.86$1.01$0.85$0.930
Jul 6, 2026 – Jul 10, 2026$0.93$0.98$0.88$0.880
Jul 13, 2026 – Jul 17, 2026$0.88$0.90$0.80$0.820
Jul 20, 2026 – Jul 24, 2026$0.83$0.85$0.76$0.770
Jul 27, 2026 – Jul 31, 2026$0.79$0.81$0.69$0.710
Aug 3, 2026 – Aug 7, 2026$0.72$0.83$0.71$0.810
Aug 10, 2026 – Aug 14, 2026$0.82$0.91$0.71$0.740
Aug 17, 2026 – Aug 21, 2026$0.74$0.93$0.72$0.840
Aug 24, 2026 – Aug 28, 2026$0.80$0.86$0.75$0.780
Aug 31, 2026 – Sep 4, 2026$0.78$0.79$0.75$0.770

Valuation

MetricValueUpside
IC Value$0.65-15%
P/E-1.85
P/B0.85
P/S77.13
EV/EBITDA-0.31
PEG
P/TBV0.85

Valuation history

Annual price overlaid with each model's fair value. Y-axis is log scale.

Annual price and model valuations for QSI, USD per share
YearPriceAIICGraham-DoddGraham Formula
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020$13.96
2021$4.10
2022$1.59
2023$2.23
2024$1.29
2025$0.95$12.91

Historic valuation ratios

Pick a category, then toggle metrics to compare.

USD millions

Line items

    USD millions

    Line items

      USD millions

      Line items

        About Quantum-Si incorporated

        Quantum-Si incorporated operates within the life sciences sector, focusing on the creation of an advanced platform for individual molecule detection. This innovative technology is designed to streamline sample preparation and subsequent sequencing processes. The company offers a unique, proprietary single molecule detection system that draws on advancements from the semiconductor industry. This system is specifically applied to the field of proteomics, paving the way for next-generation protein sequencing. Established in 2013, Quantum-Si's headquarters are located in Guilford, Connecticut.

        CEO
        Jeffrey Alan Hawkins
        Employees
        145
        Beta
        3.20

        Peer comparison

        Same-industry comparables, ranked by market cap.

        Scroll horizontally for additional metrics. Ticker column stays fixed.

        Peer comparison for QSI: basic info, valuation models, ratios, profitability, leverage, growth, cash flow, dividends, enterprise value, and Altman Z-score.
        Basic InfoIC ValuationCore ValuationProfitabilityLeverage & LiquidityGrowthCash FlowDividendsEnterprise ValueRisk
        TickerCompany NamePriceMarket CapValueUpsideP/EP/BP/SEV/EBITDAPEGP/TBVGross MarginOperating MarginNet MarginROEROICROADebt/EquityInterest CoverageCurrent RatioQuick RatioNet Debt/EBITDAEPS GrowthSales GrowthFCF GrowthFCF YieldOp Cash Flow RatioCash ROICDividend YieldDividend PayoutShareholder YieldEV/EBITEV/FCFEV/SalesAltman Z-Score
        QSIQuantum-Si incorporated$0.81161.11M$12.91+1,485%-1.850.8577.13-0.310.8547.33%-3996.72%-4160.06%-46.52%-242.65%-41.07%0.027.647.100.19-28.17%-20.34%5.26%-51.75%-4.11-242.34%0.00%0.00%0.00%-0.30-0.3011.96-0.09
        ADCTADC Therapeutics S.A.$1.13143.73M$12.58+1,013%-3.68-2.826.45-7.87-2.8290.57%-133.21%-175.31%73.43%63.93%-44.22%-2.36-2.104.374.14-1.99-30.86%14.85%13.42%-26.95%-2.0183.53%0.00%0.00%0.00%-6.48-4.978.63-6.45
        ALTAltimmune, Inc.$3.08271.83M$18.06+486%-3.501.377521.08-0.811.37100.00%-230460.98%-214860.98%-50.57%957.85%-42.03%0.16-57.7618.5518.350.09-25.37%105.00%-15.41%-21.90%-4.50690.02%0.00%0.00%0.00%-0.75-1.051721.860.13
        ANNXAnnexon, Inc.$5.41886.39M-4.254.15-3.26-13.004.150.00%0.00%0.00%-81.90%-4525.45%-65.86%0.125.685.590.6732.67%58.02%-21.24%-4.37-3899.90%0.21%-0.90%13.35%-3.08-3.571.65
        AURAAura Biosciences, Inc.$7.99826.46M-3.382.62-2.21-590.642.620.00%0.00%0.00%-73.52%-759.69%-60.35%0.138.157.850.400.57%5.10%-23.77%-4.61-573.78%0.00%0.00%8.15%-2.05-2.721.38
        AUTLAutolus Therapeutics plc$2.11561.56M$41.85+1,883%-1.332.155.07-1.73-5.522.42-27.83%-372.45%-381.40%-94.98%-451.87%-41.92%1.97-7.665.945.13-0.9924.14%646.68%28.87%-81.07%-3.86-513.82%0.00%0.00%0.00%-1.54-1.405.74-3.45
        DBVTDBV Technologies S.A.$13.48322.47M-12.0710.51-11.49-28.9710.510.00%0.00%0.00%-149.83%29889.40%-98.17%0.133.673.621.2441.67%13.95%-6.86%-2.0924738.72%0.00%0.00%8.33%-10.89-13.1612.75
        ENGNenGene Holdings Inc.$1.8092.15M-3.842.69-2.53-6.752.690.00%0.00%0.00%-53.28%-379.44%-44.05%0.19-41.146.306.130.1656.85%104.70%-22.37%-3.10-310.30%0.00%0.00%0.00%-2.34-2.861.76
        LBRXLB Pharmaceuticals Inc Co…$48.001.38B-25.772.16-14.382.160.00%0.00%0.00%-24.38%55.69%-14.55%0.0141.4439.679.91-94.39%-34.49%-5.43%-4.7364.59%0.00%0.00%35.00%-11.77-10.1533.78
        RCKTRocket Pharmaceuticals, I…$3.61394.19M-2.361.90-1.722.470.00%0.00%0.00%-60.27%-199.09%-52.00%0.09-120.846.386.250.25-26.37%-11.66%-36.23%-6.29-165.93%0.00%0.00%0.01%-1.58-1.90-1.87
        SLDBSolid Biosciences Inc.$8.39825.99M-3.673.55-2.743.550.00%0.00%0.00%-109.90%-1387.90%-82.78%0.126.145.610.22-34.97%56.40%-24.61%-4.67-1219.35%0.00%0.00%0.00%-2.64-3.00-0.12

        Disclaimer: Information on this page is provided for educational purposes only and does not constitute investment advice. Upside computed as ($0.65 ÷ $0.77) − 1 = -15.14% (IC, example).