Quantum-Si

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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. 

CEO
Jeffrey Alan Hawkins
CEOJeffrey Alan Hawkins
Employees
145
Employees145
Headquarters
Branford, Connecticut
HeadquartersBranford, Connecticut
Founded
2013
Founded2013
Employees
145
Employees145

QSI Key Statistics

Market cap
182.72M
Market cap182.72M
Price-Earnings ratio
-1.63
Price-Earnings ratio-1.63
Dividend yield
Dividend yield
Average volume
2.66M
Average volume2.66M
High today
$0.8629
High today$0.8629
Low today
$0.792
Low today$0.792
Open price
$0.80
Open price$0.80
Volume
3.07M
Volume3.07M
52 Week high
$3.10
52 Week high$3.10
52 Week low
$0.6912
52 Week low$0.6912

Stock Snapshot

With a market cap of 182.72M, Quantum-Si(QSI) trades at $0.85. The stock has a price-to-earnings ratio of -1.63.

During the trading session on 2026-04-15, Quantum-Si(QSI) shares reached a daily high of $0.86 and a low of $0.79. At a current price of $0.85, the stock is +7.7% higher than the low and still -1.1% under the high.

Trading volume for Quantum-Si(QSI) stock has reached 3.07M, versus its average volume of 2.66M.

Over the past 52 weeks, Quantum-Si(QSI) stock has traded between a high of $3.10 and a low of $0.69.

Over the past 52 weeks, Quantum-Si(QSI) stock has traded between a high of $3.10 and a low of $0.69.

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