Market Cap

$278.52M

Current · Retrieved: Oct 23, 2026 · USD

QSI Market Cap

Current$278.52MretrievedOct 23, 2026

QSI Market Cap ($1.97B → $278.52M · CAGR -28.0%)

Latest values, visible window

High-resolution chart · PNG

QSI market cap history

Daily history. Dates identify market observations.

Quantum Si Inc Class A Market Cap — Daily history
Date	Market Cap
Nov 8, 2023	246,693,551
Nov 7, 2023	262,609,264
Nov 6, 2023	247,688,283
Nov 3, 2023	272,556,585
Nov 2, 2023	274,546,049
Nov 1, 2023	236,746,230
Oct 31, 2023	238,735,695
Oct 30, 2023	232,767,302
Oct 27, 2023	227,793,642
Oct 26, 2023	250,672,479
Oct 25, 2023	246,693,551
Oct 24, 2023	266,588,192
Oct 23, 2023	250,672,479
Oct 20, 2023	250,672,479
Oct 19, 2023	240,725,159
Oct 18, 2023	256,640,872
Oct 17, 2023	270,567,121
Oct 16, 2023	260,619,800
Oct 13, 2023	266,588,192
Oct 12, 2023	274,546,049
Oct 11, 2023	292,451,226
Oct 10, 2023	298,419,618
Oct 9, 2023	284,493,369
Oct 6, 2023	306,377,475
Oct 5, 2023	312,345,867
Oct 4, 2023	306,377,475
Oct 3, 2023	302,398,546
Oct 2, 2023	312,345,867
Sep 29, 2023	330,251,044
Sep 28, 2023	338,208,901
Sep 27, 2023	330,251,044
Sep 26, 2023	317,319,527
Sep 25, 2023	343,182,561
Sep 22, 2023	393,913,896
Sep 21, 2023	393,913,896
Sep 20, 2023	399,882,288
Sep 19, 2023	417,787,466
Sep 18, 2023	415,798,001
Sep 15, 2023	445,639,963
Sep 14, 2023	453,597,820
Sep 13, 2023	461,555,676
Sep 12, 2023	479,460,853
Sep 11, 2023	457,576,748
Sep 8, 2023	445,639,963
Sep 7, 2023	457,576,748
Sep 6, 2023	459,566,212
Sep 5, 2023	459,566,212
Sep 1, 2023	471,502,997
Aug 31, 2023	465,534,604
Aug 30, 2023	449,618,891
Aug 29, 2023	447,629,427
Aug 28, 2023	437,682,107
Aug 25, 2023	421,766,394
Aug 24, 2023	415,798,001
Aug 23, 2023	423,755,858
Aug 22, 2023	391,924,432
Aug 21, 2023	401,871,753
Aug 18, 2023	391,924,432
Aug 17, 2023	389,934,968
Aug 16, 2023	401,871,753
Aug 15, 2023	415,798,001
Aug 14, 2023	396,898,092
Aug 11, 2023	439,671,571
Aug 10, 2023	433,703,178
Aug 9, 2023	461,555,676
Aug 8, 2023	407,840,145
Aug 7, 2023	457,576,748
Aug 4, 2023	674,428,337
Aug 3, 2023	703,275,567
Aug 2, 2023	675,423,069
Aug 1, 2023	738,091,189
Jul 31, 2023	773,901,543
Jul 28, 2023	686,365,122
Jul 27, 2023	616,733,878
Jul 26, 2023	610,765,485
Jul 25, 2023	594,849,772
Jul 24, 2023	640,607,447
Jul 21, 2023	594,849,772
Jul 20, 2023	622,702,270
Jul 19, 2023	706,259,763
Jul 18, 2023	706,259,763
Jul 17, 2023	644,586,375
Jul 14, 2023	481,450,317
Jul 13, 2023	513,281,743
Jul 12, 2023	471,502,997
Jul 11, 2023	411,819,073
Jul 10, 2023	429,724,250
Jul 7, 2023	407,840,145
Jul 6, 2023	391,924,432
Jul 5, 2023	401,871,753
Jul 4, 2023	356,114,078
Jul 3, 2023	356,114,078
Jun 30, 2023	356,114,078
Jun 29, 2023	340,198,365
Jun 28, 2023	344,177,293
Jun 27, 2023	318,314,259
Jun 26, 2023	302,398,546
Jun 23, 2023	308,366,939
Jun 22, 2023	308,366,939
Jun 21, 2023	296,430,154