NexusTrade Loading NexusTrade… Taking too long? Reload this page

About Quantum-Si Incorporated Class A Common Stock (QSI)

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.

Ticker
QSI
Exchange
XNAS
Sector
Healthcare
Industry
Medical Devices

Company profile updated October 10, 2026.

Stored market snapshot

As of October 8, 2026. Daily closing data may differ from the live quote shown in the dashboard.

Stored daily close (USD)
$1.22
Company market capitalization (USD)
$267,038,372.64
Price / book
1.48×

Research QSI

Compare the company’s price history and fundamentals in the dashboard. Explore disclosed trading and ownership activity in these research collections: