NASDAQ:QSI | Historical Stock Price | Quantum-Si Inc

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2020-11-13 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$0.63$1.24$2.44$4.80$9.44$18.602020-11-132026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2021

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2021-12-31$7.87$7.87698,300
2021-12-30$7.83$7.831,118,200
2021-12-29$7.20$7.20956,000
2021-12-28$7.34$7.34917,500
2021-12-27$7.88$7.881,006,100
2021-12-23$8.16$8.161,152,000
2021-12-22$7.84$7.841,838,700
2021-12-21$7.78$7.786,856,500
2021-12-20$6.33$6.33903,500
2021-12-17$6.24$6.241,118,600
2021-12-16$5.88$5.88688,200
2021-12-15$6.24$6.24779,100
2021-12-14$5.91$5.91592,600
2021-12-13$6.01$6.01546,800
2021-12-10$6.11$6.11605,500
2021-12-09$6.24$6.24530,200
2021-12-08$6.68$6.68721,100
2021-12-07$6.44$6.441,054,300
2021-12-06$5.65$5.651,083,300
2021-12-03$5.75$5.751,187,000
2021-12-02$6.04$6.041,061,800
2021-12-01$6.18$6.18914,400
2021-11-30$6.48$6.482,552,000
2021-11-29$6.28$6.28834,500
2021-11-26$6.59$6.59459,500
2021-11-24$6.50$6.501,250,600
2021-11-23$6.65$6.65894,000
2021-11-22$6.81$6.811,438,500
2021-11-19$7.58$7.58483,100
2021-11-18$7.58$7.58780,200
2021-11-17$7.94$7.94559,700
2021-11-16$8.04$8.04491,400
2021-11-15$7.89$7.89922,800
2021-11-12$8.17$8.17869,700
2021-11-11$7.87$7.87751,100
2021-11-10$7.68$7.68684,300
2021-11-09$7.78$7.78649,300
2021-11-08$8.02$8.02431,900
2021-11-05$7.90$7.90796,100
2021-11-04$8.20$8.20408,600
2021-11-03$8.39$8.39464,400
2021-11-02$8.40$8.40431,600
2021-11-01$8.45$8.45525,700
2021-10-29$8.06$8.06661,300
2021-10-28$8.03$8.03645,200
2021-10-27$7.89$7.89619,000
2021-10-26$8.17$8.17469,100
2021-10-25$8.33$8.33697,200
2021-10-22$8.10$8.10662,200
2021-10-21$8.49$8.49513,800
2021-10-20$8.72$8.72975,300
2021-10-19$8.51$8.51670,500
2021-10-18$8.18$8.18755,600
2021-10-15$8.60$8.60443,500
2021-10-14$8.75$8.75486,100
2021-10-13$8.70$8.70395,600
2021-10-12$8.55$8.55333,800
2021-10-11$8.57$8.57451,900
2021-10-08$8.33$8.33495,800
2021-10-07$8.39$8.39592,800
2021-10-06$8.00$8.00638,000
2021-10-05$8.22$8.22503,900
2021-10-04$8.07$8.07649,400
2021-10-01$8.43$8.43756,900
2021-09-30$8.34$8.34548,200
2021-09-29$8.41$8.411,151,000
2021-09-28$8.99$8.99860,900
2021-09-27$9.24$9.24581,900
2021-09-24$8.81$8.81585,000
2021-09-23$9.12$9.12419,000
2021-09-22$9.15$9.15606,200
2021-09-21$8.47$8.47446,300
2021-09-20$8.63$8.63802,600
2021-09-17$8.80$8.804,643,900
2021-09-16$8.60$8.60974,800
2021-09-15$9.10$9.10745,400
2021-09-14$9.11$9.11484,400
2021-09-13$8.93$8.93689,200
2021-09-10$9.00$9.00719,500
2021-09-09$9.17$9.17911,100
2021-09-08$8.53$8.53824,000
2021-09-07$8.85$8.851,197,200
2021-09-03$9.53$9.53755,200
2021-09-02$9.91$9.91537,100
2021-09-01$9.76$9.76707,300
2021-08-31$9.72$9.72588,800
2021-08-30$9.44$9.44857,900
2021-08-27$9.68$9.68942,600
2021-08-26$8.88$8.88511,900
2021-08-25$8.97$8.971,293,300
2021-08-24$8.95$8.951,468,200
2021-08-23$8.47$8.471,057,500
2021-08-20$8.32$8.32840,300
2021-08-19$8.28$8.281,153,400
2021-08-18$8.63$8.631,282,000
2021-08-17$8.12$8.121,059,800
2021-08-16$8.13$8.132,535,700
2021-08-13$7.97$7.971,530,200
2021-08-12$8.61$8.611,060,600
2021-08-11$8.32$8.321,469,900
2021-08-10$8.83$8.831,174,900
2021-08-09$9.11$9.111,551,300
2021-08-06$8.72$8.721,467,600
2021-08-05$9.29$9.291,395,900
2021-08-04$8.96$8.961,080,900
2021-08-03$9.00$9.001,923,000
2021-08-02$8.65$8.653,799,800
2021-07-30$9.42$9.422,334,900
2021-07-29$10.00$10.003,243,900
2021-07-28$11.00$11.003,048,000
2021-07-27$11.22$11.221,971,700
2021-07-26$12.30$12.30997,100
2021-07-23$12.10$12.10951,300
2021-07-22$11.96$11.963,387,300
2021-07-21$12.72$12.72404,900
2021-07-20$12.28$12.28773,100
2021-07-19$11.87$11.87782,400
2021-07-16$11.09$11.091,196,800
2021-07-15$11.86$11.861,189,500
2021-07-14$12.01$12.011,064,800
2021-07-13$11.60$11.601,439,800
2021-07-12$12.81$12.811,107,500
2021-07-09$13.56$13.561,594,400
2021-07-08$12.13$12.131,350,400
2021-07-07$11.58$11.581,630,200
2021-07-06$12.64$12.641,063,400
2021-07-02$12.54$12.541,031,900
2021-07-01$12.06$12.061,234,700
2021-06-30$12.26$12.261,278,900
2021-06-29$12.54$12.541,813,600
2021-06-28$12.38$12.382,453,800
2021-06-25$11.52$11.521,123,400
2021-06-24$11.00$11.00849,300
2021-06-23$10.55$10.551,016,100
2021-06-22$10.19$10.191,437,500
2021-06-21$9.71$9.711,217,600
2021-06-18$9.22$9.222,105,400
2021-06-17$8.10$8.103,495,000
2021-06-16$8.30$8.30888,300
2021-06-15$8.58$8.581,129,300
2021-06-14$8.49$8.491,583,900
2021-06-11$9.75$9.75577,900
2021-06-10$10.68$10.68316,800
2021-06-09$10.55$10.55560,900
2021-06-08$10.55$10.55512,200
2021-06-07$10.30$10.30476,800
2021-06-04$9.99$9.99396,000
2021-06-03$10.12$10.12393,600
2021-06-02$10.14$10.14499,800
2021-06-01$10.15$10.15295,900
2021-05-28$10.26$10.26714,000
2021-05-27$9.97$9.97298,100
2021-05-26$9.99$9.99414,500
2021-05-25$9.96$9.96238,700
2021-05-24$9.96$9.96184,600
2021-05-21$9.96$9.96227,000
2021-05-20$9.97$9.97218,700
2021-05-19$10.00$10.00133,200
2021-05-18$10.05$10.05302,300
2021-05-17$10.06$10.06133,700
2021-05-14$10.08$10.08229,200
2021-05-13$10.02$10.02484,000
2021-05-12$10.11$10.11252,100
2021-05-11$10.14$10.14363,100
2021-05-10$10.35$10.35158,300
2021-05-07$10.40$10.40138,900
2021-05-06$10.30$10.30317,800
2021-05-05$10.33$10.33109,300
2021-05-04$10.28$10.28312,900
2021-05-03$10.27$10.27184,100
2021-04-30$10.39$10.39130,500
2021-04-29$10.39$10.39234,900
2021-04-28$10.38$10.38169,100
2021-04-27$10.50$10.50136,400
2021-04-26$10.48$10.48170,700
2021-04-23$10.44$10.44288,000
2021-04-22$10.63$10.63168,600
2021-04-21$10.67$10.67293,500
2021-04-20$10.22$10.22384,000
2021-04-19$10.45$10.45441,400
2021-04-16$10.59$10.59226,400
2021-04-15$10.78$10.78426,600
2021-04-14$11.15$11.15202,500
2021-04-13$11.40$11.40222,700
2021-04-12$11.53$11.53245,600
2021-04-09$11.72$11.72178,500
2021-04-08$11.76$11.76237,100
2021-04-07$11.79$11.79309,800
2021-04-06$12.04$12.04459,200
2021-04-05$12.44$12.44430,000
2021-04-01$12.65$12.65532,700
2021-03-31$11.92$11.92335,600
2021-03-30$11.89$11.89362,500
2021-03-29$12.05$12.05382,200
2021-03-26$12.30$12.30974,300
2021-03-25$11.23$11.23427,800
2021-03-24$11.27$11.27547,300
2021-03-23$12.06$12.06384,800
2021-03-22$12.75$12.75366,900
2021-03-19$12.80$12.80232,500
2021-03-18$12.73$12.73957,400
2021-03-17$13.08$13.08337,400
2021-03-16$13.12$13.12545,800
2021-03-15$14.41$14.41463,900
2021-03-12$13.96$13.96341,200
2021-03-11$13.64$13.64528,700
2021-03-10$13.24$13.241,052,800
2021-03-09$13.01$13.01942,100
2021-03-08$12.08$12.081,054,000
2021-03-05$13.21$13.211,754,400
2021-03-04$11.67$11.672,301,300
2021-03-03$12.90$12.901,374,100
2021-03-02$13.68$13.68750,500
2021-03-01$14.65$14.651,017,600
2021-02-26$14.32$14.321,037,200
2021-02-25$14.40$14.401,964,500
2021-02-24$16.49$16.491,639,100
2021-02-23$15.06$15.063,109,200
2021-02-22$17.71$17.712,991,500
2021-02-19$20.49$20.494,896,600
2021-02-18$22.41$22.4139,472,800
2021-02-17$10.38$10.3816,800
2021-02-16$10.39$10.3926,800
2021-02-12$10.31$10.3114,000
2021-02-11$10.36$10.3611,600
2021-02-10$10.46$10.4611,600
2021-02-09$10.27$10.2724,400
2021-02-08$10.14$10.1451,900
2021-02-05$10.30$10.30700
2021-02-04$10.27$10.277,700
2021-02-03$10.38$10.3812,900
2021-02-02$10.49$10.4910,800
2021-02-01$10.65$10.6518,600
2021-01-29$10.22$10.227,100
2021-01-28$10.28$10.287,800
2021-01-27$10.05$10.0562,200
2021-01-26$10.21$10.2162,900
2021-01-25$10.26$10.2617,800
2021-01-22$10.43$10.436,600
2021-01-21$10.35$10.3536,600
2021-01-20$10.30$10.30900
2021-01-19$10.33$10.337,400
2021-01-15$10.32$10.3226,700
2021-01-14$10.44$10.4441,200
2021-01-13$10.55$10.5517,400
2021-01-12$10.33$10.331,500
2021-01-11$10.40$10.404,000
2021-01-08$10.27$10.274,000
2021-01-07$10.72$10.720
2021-01-06$10.72$10.726,100
2021-01-05$10.24$10.247,700
2021-01-04$10.49$10.493,000