QSI Stock Summary and Trading Ideas (Quantum-Si - Class A | NASDAQ:QSI)

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 protein detection and analysis. It has developed a proprietary universal single-molecule detection platform that enables Next-Generation Protein Sequencing (NGPS), the ability to sequence proteins.

Quantum-Si - Class A trades on the NASDAQ stock market under the symbol QSI.

As of January 23, 2026, QSI stock price declined to $1.25 with 3,871,130 million shares trading.

QSI has a beta of 1.92, meaning it tends to be more sensitive to market movements. QSI has a correlation of 0.14 to the broad based SPY ETF.

QSI has a market cap of $269.36 million. This is considered a Small Cap stock.

Last quarter Quantum-Si - Class A reported $552,000 in Revenue and -$.17 earnings per share. This fell short of revenue expectation by $-35,598 and missed earnings estimates by -$.03.

In the last 3 years, QSI traded as high as $5.77 and as low as $.61.

The top ETF exchange traded funds that QSI belongs to (by Net Assets): ARKG, VTI, IWM, VXF, IWN.

QSI has underperformed the market in the last year with a return of -48.1%, while the SPY ETF gained +14.2%. In the last 3 month period, QSI fell short of the market, returning -43.2%, while SPY returned +2.9%. However, in the most recent 2 weeks QSI has outperformed the stock market by returning +2.5%, while SPY returned -0.7%.

QSI support price is $1.25 and resistance is $1.37 (based on 1 day standard deviation move). This means that using the most recent 20 day stock volatility and applying a one standard deviation move around the stock's closing price, stastically there is a 67% probability that QSI shares will trade within this expected range on the day.