Quantum-Si Incorporated Class A Share Price
NASDAQ: QSI | Small CapQuantum-Si Incorporated Class A Stock Performance
Quantum-Si Incorporated Class A Share Price Today
As of 29 October 2026, Quantum-Si Incorporated Class A's share price is $1.74. The stock opened at $1.68, compared to its previous close of $1.73. During today's trading session, Quantum-Si Incorporated Class A's share price traded between $1.67 and $1.76, with an average price of $1.71. Over the past 52 weeks, the stock has recorded a high of $2.23 and a low of $0.69. In terms of performance, Quantum-Si Incorporated Class A's share price has risen by 76.32% over the last six months and is down 18.93% on a year-on-year basis.
Quantum-Si Incorporated Class A Share Price Chart
Quantum-Si Incorporated Class A Quarterly Profit & Loss
All figures in USD
Quantum-Si Incorporated Class A Annual Profit & Loss
All figures in USD
About Quantum-Si Incorporated Class A
Quantum-Si Inc is a life sciences company focused on proteomics research and analytical technologies. It develops single-molecule detection platforms designed to enable next-generation protein sequencing (NGPS) and large-scale protein analysis. Its technology supports massively parallel sequencing of proteins and can also be applied to the study of nucleic acids, providing tools for researchers and clinical applications in molecular analysis. The company's revenue is derived from sales of products and services.
Quantum-Si Incorporated Class A Historical Returns
| Month | Open | Close | Change % |
|---|---|---|---|
Oct 2026 | $1.20 | $1.74 | +62.91% |
Sep 2026 | $0.76 | $1.06 | +32.46% |
Aug 2026 | $0.72 | $0.80 | +12.13% |
Jul 2026 | $0.90 | $0.72 | -18.98% |
Jun 2026 | $1.14 | $0.89 | -25.63% |
May 2026 | $0.97 | $1.19 | +20.93% |
Apr 2026 | $0.79 | $0.98 | +26.48% |
Mar 2026 | $0.94 | $0.78 | -19.38% |
Feb 2026 | $1.12 | $0.96 | -15.35% |
Jan 2026 | $1.13 | $1.14 | +4.59% |
Dec 2025 | $1.34 | $1.09 | -22.97% |
Nov 2025 | $2.16 | $1.42 | -33.88% |