Market Cap

$228.79M

Current · Retrieved: Oct 23, 2026 · USD

QSI Market Cap

Current$228.79MretrievedOct 23, 2026

QSI Market Cap ($1.97B → $228.79M · CAGR -30.4%)

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
Jan 22, 2026	260,619,800
Jan 21, 2026	244,704,087
Jan 20, 2026	236,746,230
Jan 16, 2026	252,661,943
Jan 15, 2026	244,704,087
Jan 14, 2026	252,661,943
Jan 13, 2026	252,661,943
Jan 12, 2026	240,725,159
Jan 9, 2026	242,714,623
Jan 8, 2026	248,683,015
Jan 7, 2026	250,672,479
Jan 6, 2026	254,651,408
Jan 5, 2026	250,672,479
Jan 2, 2026	230,777,838
Dec 31, 2025	218,841,053
Dec 30, 2025	220,830,518
Dec 29, 2025	234,756,766
Dec 26, 2025	244,704,087
Dec 24, 2025	260,619,800
Dec 23, 2025	244,704,087
Dec 22, 2025	252,661,943
Dec 21, 2025	242,714,623
Dec 20, 2025	242,714,623
Dec 19, 2025	252,661,943
Dec 18, 2025	242,714,623
Dec 17, 2025	238,735,695
Dec 16, 2025	242,714,623
Dec 15, 2025	244,704,087
Dec 14, 2025	278,524,977
Dec 13, 2025	278,524,977
Dec 12, 2025	256,640,872
Dec 11, 2025	278,524,977
Dec 10, 2025	286,482,834
Dec 9, 2025	282,503,905
Dec 8, 2025	288,472,298
Dec 7, 2025	292,451,226
Dec 6, 2025	292,451,226
Dec 5, 2025	286,482,834
Dec 4, 2025	292,451,226
Dec 3, 2025	270,567,121
Dec 2, 2025	252,661,943
Dec 1, 2025	256,640,872
Nov 30, 2025	268,577,656
Nov 29, 2025	268,577,656
Nov 28, 2025	280,514,441
Nov 27, 2025	268,577,656
Nov 26, 2025	268,577,656
Nov 25, 2025	268,577,656
Nov 24, 2025	268,577,656
Nov 23, 2025	246,693,551
Nov 22, 2025	246,693,551
Nov 21, 2025	252,661,943
Nov 20, 2025	246,693,551
Nov 19, 2025	254,651,408
Nov 18, 2025	252,661,943
Nov 17, 2025	258,630,336
Nov 16, 2025	276,535,513
Nov 15, 2025	276,535,513
Nov 14, 2025	272,556,585
Nov 13, 2025	276,535,513
Nov 12, 2025	302,398,547
Nov 11, 2025	314,335,331
Nov 10, 2025	318,314,259
Nov 9, 2025	328,261,580
Nov 8, 2025	328,261,580
Nov 7, 2025	314,335,331
Nov 6, 2025	328,261,580
Nov 5, 2025	358,103,542
Nov 4, 2025	366,061,398
Nov 3, 2025	397,892,824
Nov 2, 2025	403,861,217
Nov 1, 2025	403,861,217
Oct 31, 2025	427,734,786
Oct 30, 2025	403,861,217
Oct 29, 2025	425,745,322
Oct 28, 2025	433,703,179
Oct 27, 2025	465,534,604
Oct 26, 2025	437,682,107
Oct 25, 2025	437,682,107
Oct 24, 2025	455,587,284
Oct 23, 2025	437,682,107
Oct 22, 2025	437,682,107
Oct 21, 2025	465,534,604
Oct 20, 2025	515,271,208
Oct 19, 2025	505,323,887
Oct 18, 2025	505,323,887
Oct 17, 2025	453,597,820
Oct 16, 2025	505,323,887
Oct 15, 2025	523,229,064
Oct 14, 2025	427,734,786
Oct 13, 2025	413,808,537
Oct 12, 2025	346,166,757
Oct 11, 2025	346,166,757
Oct 10, 2025	332,240,508
Oct 9, 2025	346,166,757
Oct 8, 2025	352,135,150
Oct 7, 2025	352,135,150
Oct 6, 2025	360,093,006
Oct 5, 2025	306,377,475
Oct 4, 2025	306,377,475