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 — 2023

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2023-12-29$2.01$2.011,239,700——
2023-12-28$2.27$2.271,564,100——
2023-12-27$2.08$2.081,002,500——
2023-12-26$1.94$1.94604,600——
2023-12-22$1.88$1.88708,800——
2023-12-21$1.82$1.82445,200——
2023-12-20$1.74$1.74712,000——
2023-12-19$1.88$1.88998,600——
2023-12-18$1.67$1.67581,200——
2023-12-15$1.70$1.701,223,700——
2023-12-14$1.80$1.801,197,000——
2023-12-13$1.72$1.72799,500——
2023-12-12$1.54$1.54326,200——
2023-12-11$1.51$1.51444,700——
2023-12-08$1.57$1.57517,400——
2023-12-07$1.55$1.55416,900——
2023-12-06$1.57$1.57442,300——
2023-12-05$1.59$1.59569,200——
2023-12-04$1.76$1.76549,500——
2023-12-01$1.74$1.74920,700——
2023-11-30$1.61$1.61610,300——
2023-11-29$1.62$1.62774,300——
2023-11-28$1.51$1.51483,500——
2023-11-27$1.49$1.49514,600——
2023-11-24$1.53$1.53322,900——
2023-11-22$1.52$1.52590,100——
2023-11-21$1.55$1.55571,000——
2023-11-20$1.58$1.58654,500——
2023-11-17$1.65$1.65640,500——
2023-11-16$1.59$1.59653,500——
2023-11-15$1.66$1.661,380,900——
2023-11-14$1.60$1.601,486,000——
2023-11-13$1.35$1.35498,900——
2023-11-10$1.42$1.421,125,000——
2023-11-09$1.33$1.331,181,900——
2023-11-08$1.24$1.24711,500——
2023-11-07$1.32$1.32435,000——
2023-11-06$1.25$1.25516,800——
2023-11-03$1.37$1.371,142,000——
2023-11-02$1.38$1.38877,000——
2023-11-01$1.19$1.19431,900——
2023-10-31$1.20$1.20659,100——
2023-10-30$1.17$1.17261,400——
2023-10-27$1.15$1.15667,600——
2023-10-26$1.26$1.26431,800——
2023-10-25$1.24$1.24612,100——
2023-10-24$1.34$1.34778,300——
2023-10-23$1.26$1.26515,000——
2023-10-20$1.26$1.26738,000——
2023-10-19$1.21$1.21882,900——
2023-10-18$1.29$1.29519,400——
2023-10-17$1.36$1.36681,200——
2023-10-16$1.31$1.311,255,300——
2023-10-13$1.34$1.34568,800——
2023-10-12$1.38$1.38583,700——
2023-10-11$1.47$1.47379,400——
2023-10-10$1.50$1.50804,300——
2023-10-09$1.43$1.431,032,900——
2023-10-06$1.54$1.54619,600——
2023-10-05$1.57$1.57692,400——
2023-10-04$1.54$1.54466,800——
2023-10-03$1.52$1.52671,300——
2023-10-02$1.57$1.57719,500——
2023-09-29$1.66$1.66529,500——
2023-09-28$1.70$1.70479,900——
2023-09-27$1.66$1.66788,500——
2023-09-26$1.60$1.60844,600——
2023-09-25$1.73$1.731,468,400——
2023-09-22$1.98$1.98680,300——
2023-09-21$1.98$1.98756,500——
2023-09-20$2.01$2.01920,400——
2023-09-19$2.10$2.10783,400——
2023-09-18$2.09$2.09816,500——
2023-09-15$2.24$2.241,154,000——
2023-09-14$2.28$2.28693,200——
2023-09-13$2.32$2.32896,400——
2023-09-12$2.41$2.41803,700——
2023-09-11$2.30$2.301,018,200——
2023-09-08$2.24$2.241,299,100——
2023-09-07$2.30$2.301,631,800——
2023-09-06$2.31$2.31824,100——
2023-09-05$2.31$2.31819,400——
2023-09-01$2.37$2.371,285,000——
2023-08-31$2.34$2.341,149,300——
2023-08-30$2.26$2.26890,500——
2023-08-29$2.25$2.251,728,900——
2023-08-28$2.20$2.201,104,500——
2023-08-25$2.12$2.121,237,200——
2023-08-24$2.09$2.091,931,500——
2023-08-23$2.13$2.131,789,900——
2023-08-22$1.97$1.971,185,700——
2023-08-21$2.02$2.021,441,200——
2023-08-18$1.97$1.971,209,600——
2023-08-17$1.96$1.961,894,200——
2023-08-16$2.02$2.021,937,300——
2023-08-15$2.09$2.091,953,700——
2023-08-14$2.00$2.002,735,500——
2023-08-11$2.21$2.212,256,100——
2023-08-10$2.18$2.183,010,400——
2023-08-09$2.32$2.323,056,500——
2023-08-08$2.05$2.054,152,600——
2023-08-07$2.30$2.3010,609,000——
2023-08-04$3.39$3.392,829,900——
2023-08-03$3.54$3.541,856,700——
2023-08-02$3.40$3.392,112,000——
2023-08-01$3.71$3.713,101,000——
2023-07-31$3.89$3.894,293,700——
2023-07-28$3.45$3.453,168,600——
2023-07-27$3.10$3.103,754,000——
2023-07-26$3.07$3.074,005,300——
2023-07-25$2.99$2.992,524,100——
2023-07-24$3.22$3.223,605,700——
2023-07-21$2.99$2.992,018,400——
2023-07-20$3.13$3.132,631,800——
2023-07-19$3.55$3.553,991,200——
2023-07-18$3.55$3.555,634,800——
2023-07-17$3.24$3.2413,165,300——
2023-07-14$2.42$2.423,628,000——
2023-07-13$2.58$2.583,954,900——
2023-07-12$2.37$2.371,369,900——
2023-07-11$2.07$2.07670,900——
2023-07-10$2.16$2.16745,300——
2023-07-07$2.05$2.05858,600——
2023-07-06$1.97$1.971,219,600——
2023-07-05$2.02$2.021,656,200——
2023-07-03$1.79$1.79422,400——
2023-06-30$1.79$1.79720,100——
2023-06-29$1.71$1.71513,800——
2023-06-28$1.73$1.73639,700——
2023-06-27$1.60$1.601,030,800——
2023-06-26$1.52$1.52881,400——
2023-06-23$1.55$1.553,031,400——
2023-06-22$1.55$1.55922,400——
2023-06-21$1.49$1.492,050,500——
2023-06-20$1.44$1.442,225,000——
2023-06-16$1.46$1.461,917,100——
2023-06-15$1.60$1.60518,800——
2023-06-14$1.61$1.61430,700——
2023-06-13$1.68$1.68598,100——
2023-06-12$1.61$1.61541,500——
2023-06-09$1.60$1.60390,800——
2023-06-08$1.69$1.69282,300——
2023-06-07$1.77$1.77534,000——
2023-06-06$1.83$1.83535,900——
2023-06-05$1.66$1.66543,300——
2023-06-02$1.69$1.69459,100——
2023-06-01$1.54$1.54333,500——
2023-05-31$1.51$1.51521,400——
2023-05-30$1.59$1.59414,200——
2023-05-26$1.63$1.63210,600——
2023-05-25$1.57$1.57283,000——
2023-05-24$1.67$1.67290,700——
2023-05-23$1.72$1.72974,700——
2023-05-22$1.75$1.751,029,900——
2023-05-19$1.52$1.52333,700——
2023-05-18$1.45$1.45182,500——
2023-05-17$1.44$1.44312,500——
2023-05-16$1.38$1.38201,500——
2023-05-15$1.42$1.42390,000——
2023-05-12$1.41$1.41287,500——
2023-05-11$1.54$1.54480,400——
2023-05-10$1.63$1.63900,800——
2023-05-09$1.42$1.42191,400——
2023-05-08$1.44$1.44338,600——
2023-05-05$1.45$1.45393,800——
2023-05-04$1.41$1.41431,300——
2023-05-03$1.46$1.46353,900——
2023-05-02$1.42$1.42300,900——
2023-05-01$1.46$1.46260,100——
2023-04-28$1.47$1.47612,900——
2023-04-27$1.47$1.47361,500——
2023-04-26$1.53$1.53372,100——
2023-04-25$1.65$1.65440,900——
2023-04-24$1.65$1.65422,700——
2023-04-21$1.60$1.60360,800——
2023-04-20$1.58$1.58565,900——
2023-04-19$1.54$1.54405,300——
2023-04-18$1.52$1.52206,600——
2023-04-17$1.54$1.54414,700——
2023-04-14$1.52$1.52526,700——
2023-04-13$1.54$1.54508,400——
2023-04-12$1.49$1.49801,400——
2023-04-11$1.61$1.61664,500——
2023-04-10$1.55$1.55970,200——
2023-04-06$1.58$1.58391,000——
2023-04-05$1.56$1.56458,900——
2023-04-04$1.61$1.611,799,000——
2023-04-03$1.73$1.73591,900——
2023-03-31$1.76$1.761,001,400——
2023-03-30$1.65$1.65347,400——
2023-03-29$1.66$1.66308,300——
2023-03-28$1.60$1.60456,500——
2023-03-27$1.65$1.65364,700——
2023-03-24$1.60$1.60715,800——
2023-03-23$1.59$1.591,261,300——
2023-03-22$1.65$1.65708,200——
2023-03-21$1.75$1.75474,000——
2023-03-20$1.71$1.71830,300——
2023-03-17$1.73$1.731,367,000——
2023-03-16$1.77$1.77528,300——
2023-03-15$1.77$1.77455,100——
2023-03-14$1.78$1.781,220,800——
2023-03-13$1.68$1.68855,700——
2023-03-10$1.59$1.591,113,000——
2023-03-09$1.69$1.691,030,400——
2023-03-08$1.79$1.79877,200——
2023-03-07$1.89$1.89374,300——
2023-03-06$1.88$1.88997,500——
2023-03-03$2.16$2.16926,300——
2023-03-02$1.94$1.94700,500——
2023-03-01$1.79$1.79770,600——
2023-02-28$1.82$1.821,971,400——
2023-02-27$1.81$1.81644,300——
2023-02-24$1.84$1.84576,100——
2023-02-23$1.92$1.92361,100——
2023-02-22$1.92$1.92610,900——
2023-02-21$1.93$1.93755,700——
2023-02-17$2.03$2.03680,100——
2023-02-16$2.02$2.02614,400——
2023-02-15$2.16$2.16521,500——
2023-02-14$2.10$2.10609,700——
2023-02-13$2.07$2.07534,800——
2023-02-10$2.13$2.13615,400——
2023-02-09$2.16$2.16517,400——
2023-02-08$2.28$2.28362,500——
2023-02-07$2.37$2.37390,300——
2023-02-06$2.36$2.36448,800——
2023-02-03$2.45$2.45732,300——
2023-02-02$2.58$2.581,194,400——
2023-02-01$2.17$2.17971,900——
2023-01-31$2.22$2.22531,700——
2023-01-30$2.15$2.15488,700——
2023-01-27$2.19$2.19445,000——
2023-01-26$2.22$2.22510,700——
2023-01-25$2.28$2.28427,300——
2023-01-24$2.14$2.14326,100——
2023-01-23$2.25$2.25483,900——
2023-01-20$2.25$2.25622,600——
2023-01-19$2.22$2.22584,500——
2023-01-18$2.29$2.29772,800——
2023-01-17$2.37$2.37622,300——
2023-01-13$2.21$2.21581,600——
2023-01-12$2.18$2.18651,300——
2023-01-11$2.10$2.10699,600——
2023-01-10$1.97$1.97450,500——
2023-01-09$1.87$1.87924,300——
2023-01-06$1.72$1.721,015,200——
2023-01-05$1.74$1.74810,800——
2023-01-04$1.89$1.89516,600——
2023-01-03$1.84$1.84721,000——