Quantum-Si
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Robinhood gives you the tools you need to put your money in motion. You can buy or sell Quantum-Si and other ETFs, options, and stocks.About QSI
Quantum-Si, Inc. is a life sciences company focused on revolutionizing the growing field of proteomics. It engages in the development of a proprietary universal single-molecule detection platform to enable Next-Generation Protein Sequencing (NGPS), the ability to sequence proteins in a massively parallel fashion.
CEOJeffrey Alan Hawkins
CEOJeffrey Alan Hawkins
Employees149
Employees149
HeadquartersBranford, Connecticut
HeadquartersBranford, Connecticut
Founded2013
Founded2013
Employees149
Employees149
QSI Key Statistics
Market cap283.37M
Market cap283.37M
Price-Earnings ratio-1.99
Price-Earnings ratio-1.99
Dividend yield—
Dividend yield—
Average volume5.07M
Average volume5.07M
High today—
High today—
Low today—
Low today—
Open price$1.23
Open price$1.23
Volume20.06K
Volume20.06K
52 Week high$3.10
52 Week high$3.10
52 Week low$0.9499
52 Week low$0.9499
Stock Snapshot
With a market cap of 283.37M, Quantum-Si(QSI) trades at $1.28. The stock has a price-to-earnings ratio of -1.99.
On 2026-01-23, Quantum-Si(QSI) shares started trading at $1.23, with intraday highs of — and lows of —.
Trading volume for Quantum-Si(QSI) stock has reached 20.06K, versus its average volume of 5.07M.
Over the past 52 weeks, Quantum-Si(QSI) stock has traded between a high of $3.10 and a low of $0.95.
Over the past 52 weeks, Quantum-Si(QSI) stock has traded between a high of $3.10 and a low of $0.95.
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