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 cap268.26M
Market cap268.26M
Price-Earnings ratio-1.84
Price-Earnings ratio-1.84
Dividend yield—
Dividend yield—
Average volume6.11M
Average volume6.11M
High today$1.25
High today$1.25
Low today$1.18
Low today$1.18
Open price$1.21
Open price$1.21
Volume4.93M
Volume4.93M
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 268.26M, Quantum-Si(QSI) trades at $1.24. The stock has a price-to-earnings ratio of -1.84.
During the trading session on 2026-01-13, Quantum-Si(QSI) shares reached a daily high of $1.25 and a low of $1.18. At a current price of $1.24, the stock is +5.0% higher than the low and still -0.8% under the high.
Trading volume for Quantum-Si(QSI) stock has reached 4.93M, versus its average volume of 6.11M.
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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