Quantum-Si Incorporated Class A Share Price
NASDAQ: QSI | Micro CapQuantum-Si Incorporated Class A Stock Performance
Quantum-Si Incorporated Class A Share Price Today
As of 19 September 2026, Quantum-Si Incorporated Class A's share price is $0.75. The stock opened at $0.77, compared to its previous close of $0.78. During today's trading session, Quantum-Si Incorporated Class A's share price traded between $0.75 and $0.77, with an average price of $0.76. Over the past 52 weeks, the stock has recorded a high of $3.09 and a low of $0.69. In terms of performance, Quantum-Si Incorporated Class A's share price has declined by 4.22% over the last six months and is down 47.34% 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 incorporated, a life sciences company, engages in the development of single-molecule detection platform to enable Next Generation Protein Sequencing (NGPS). The company offers Platinum NGPS instrument that provides single molecule amino acid level resolution with a streamlined workflow, including automated data analysis that accessible to researchers in all laboratory types; Platinum Pro NGPS instrument, a single molecule amino acid resolution, which provides an enhanced user interface, cloud or on instrument data analysis and an available pro mode; Library preparation kits to prepare protein sample for sequencing; Barcoding Kits to optimize the workflow and performance of technology; and Sequencing Kits contains the reagents and consumables used to perform NGPS on the Platinum or Platinum Pro instrument. It also provides Platinum Analysis Software, a cloud-based solution that automates data analysis workflows and provides a user-friendly interface and visualization of the sequencing results. Its products are used in antibody characterization, biomarker identification, protein identification, protein variants, protein barcoding, and post translational modification analysis applications. Quantum-Si incorporated was founded in 2013 is headquartered in Branford, Connecticut.
Quantum-Si Incorporated Class A Historical Returns
| Month | Open | Close | Change % |
|---|---|---|---|
Sep 2026 | $0.76 | $0.75 | -6.59% |
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% |
Oct 2025 | $1.42 | $2.14 | +51.24% |