Quantum-Si (QSI)

Common Shares

Sell: $2.62|Buy: $2.63|Change: 0.48 (22.33%)

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Open

$2.45

Previous close

$2.15

Trade high

$2.75

Volume

53,572,323

Year high

$5.77

Year low

$0.6121

Dividend yield

–

Market capitalisation

$532.56 mn

P/E ratio

4.55

ISIN

US74765K1051

This share can be held in a Dealing account Stocks and shares ISA Lifetime ISA JISA SIPP

Share price

Performance 15/10/2025

1D | 1M | 3M | 1Y | 3Y ann | 5Y ann | 10Y ann

	Total return (%)
Quantum-Si	+ 22.33
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Company profile

Quantum-Si Inc is a life sciences company focused on the development and commercialization of proteomics research tools. The company has designed and developed a hardware, consumable, and software solution to provide a solution for proteindetection and analysis. It has developed a proprietary universal single-molecule detection platform that enables Next-Generation Protein Sequencing (NGPS), the ability to sequence proteins.

Sector

Healthcare

AJ Bell Management Limited (company number 03948391), AJ Bell Securities Limited (company number 02723420) and AJ Bell Asset Management Limited (company number 09742568) are authorised and regulated by the Financial Conduct Authority. All companies are registered in England and Wales at 4 Exchange Quay, Salford Quays, Manchester M5 3EE. See website for full details. AJ Bell procures the provision of the Morningstar Licensed Tools on an “as is” basis and does not guarantee the performance of or accept liability for the Licensed Tools. To the maximum extent permitted by law, AJ Bell excludes liability for the Licensed Tools, including liability for any failure, interruption, delay or defect in the performance of any Licensed Tool, unless it arises as a direct result of the negligence of AJ Bell.