Quantum-Si incorporated (QSI) Stock

Healthcare · Medical Devices · Member of Other US Stocks

Quantum-Si incorporated (QSI) closed at USD 1.39 on 2026-10-14, a change of -36.2 % over the past year, with a market capitalization of USD 286.74M.

Quantum-Si incorporated recent closing prices

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Quantum-Si incorporated key figures

Previous close

USD 1.39 (2026-10-14)

1-year change

-36.2 %

Market cap

USD 286.74M

Enterprise value

USD 178.25M

P/E ratio (trailing)

-2.98

P/E ratio (forward)

-3.74

EPS (trailing)

-0.44

EPS (forward)

-0.35

PEG ratio

n/a

Price to book

1.59

Revenue growth

-41.8 %

Earnings growth

n/a

Dividend per share (trailing)

0.00

Short ratio

3.88

Employees

145

Analyst consensus (third-party)

buy

Source: Yahoo Finance via yfinance. Data may be delayed, incomplete or incorrect.

About Quantum-Si incorporated

Quantum-Si incorporated, a life sciences company, develops proprietary, universal, and single-molecule detection platform applied to proteomics to enable next-gen protein sequencing (NGPS). The company offers Platinum and Platinum Pro NGPS instruments for single-molecule, amino acid level resolution, and automated data analysis; library preparation kits to prepare a customer's protein sample for sequencing; and sequencing kits, which contain the reagents and consumables used to perform NGPS. It also provides Platinum analysis software, a cloud-based solution that automates data analysis workflows and visualizes the sequencing results. The company was founded in 2013 and is headquartered in Branford, Connecticut.

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