Quantum-Si incorporated (QSI) Stock

Quantum-Si incorporated (QSI) is a Technology stock trading at $0.99 (as of 2026-06-18), with a market capitalization of $257.60M and a trailing P/E of -2.4. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.

Quantum-Si incorporated is a life sciences company that develops a single-molecule detection platform intended to support sample preparation and sequencing. The platform is used across applications including semiconductor-based workflows and proteomics for protein sequencing. The company is based in Guilford, Connecticut and was incorporated in 2013.

Valuation — source: SEC EDGAR (first-party)
Price	$0.99
Market Cap	$257.60M
P/E Ratio	-2.4
EV / EBITDA	-2.0
Price / Book	1.28
Price / Sales	139.09
DCF Value (model)	$-8.26
DCF Upside vs Price	-934.7%

Profitability & Growth — source: SEC EDGAR
Revenue (TTM)	$2.44M
Net Margin	-4160.1%
Return on Equity	-51.7%
Current Ratio	12.60
Revenue Growth (YoY)	-20.3%
EPS Growth (YoY)	-28.2%
FCF Growth (YoY)	5.3%

Financial Health — source: SEC EDGAR
Altman Z-Score	-0.16 (distress)

Valuation vs Sector & Industry
Stock P/E	-2.4
Sector P/E (Technology)	32.6
Industry P/E (Measuring & Control Equipment)	60.1
vs Sector	-107.3%
vs Industry	-104.0%

Smart-Money Activity — SEC Form 4 / 13F / Congressional disclosures
Top Institutional Holder	EverSource Wealth Advisors, LLC ($24.37M)
Institutional Holders Tracked	10

Company
Sector	Technology
Industry	Measuring & Control Equipment
CEO	Jeffrey Alan Hawkins
Employees	149
Country	US
IPO Date	2020-11-13

Related Companies (Business model: Medical Devices / Life Science Tools; 8 closest by market cap; US-domiciled)

Data as of 2026-06-18.

Figures sourced from U.S. Securities and Exchange Commission (SEC EDGAR) filings and market data. Not personalized investment advice.