Quantum-Si - Class A (QSI) closed at $1.33 on November 6, 2026, up 13.7% from the previous close, on volume of 7,885,540 shares (30-day average 10,504,632).
Data as of November 6, 2026.
6-Nov-2026
Quantum-Si (QSI) Receives a Hold from Canaccord Genuity
TipRanks (Fri, 6-Nov 9:56 AM ET)
Quantum-Si GAAP EPS of -$0.10 beats by $0.02, revenue of $0.21M misses by $0.06M
Seeking Alpha News (Thu, 5-Nov 4:29 PM ET)
Quantum-Si Reports Third Quarter 2026 Financial Results and Provides Business Update
Globe Newswire (Thu, 5-Nov 4:05 PM ET)
Globe Newswire (Fri, 16-Oct 8:00 AM ET)
Quantum-Si Regains Compliance with Nasdaq Minimum Bid Price Requirement
Globe Newswire (Thu, 15-Oct 9:00 AM ET)
Quantum-Si Demonstrates Detection of 19 Amino Acids in Proteus Development Program
Globe Newswire (Thu, 8-Oct 4:05 PM ET)
Market Chameleon (Tue, 29-Sep 7:04 AM ET)
Globe Newswire (Mon, 28-Sep 8:15 PM ET)
Quantum-Si Announces Detection of 18 Amino Acids Using a Developmental Sequencing Kit on Proteus
Globe Newswire (Tue, 15-Sep 7:00 AM ET)
Quantum-Si Expands Proteus Roadshow with Additional U.S. and European Cities
Globe Newswire (Wed, 9-Sep 8:00 AM ET)
Quantum-Si Inc is a life sciences company focused on proteomics research and analytical technologies. It develops single-molecule detection platforms designed to enable next-generation protein sequencing (NGPS) and large-scale protein analysis. Its technology supports massively parallel sequencing of proteins and can also be applied to the study of nucleic acids, providing tools for researchers and clinical applications in molecular analysis. The company's revenue is derived from sales of products and services.
Quantum-Si - Class A trades on the NASDAQ stock market under the symbol QSI.
As of November 6, 2026, QSI stock price climbed to $1.33 with 7,885,540 million shares trading.
QSI has a beta of 3.53, meaning it tends to be more sensitive to market movements. QSI has a correlation of 0.15 to the broad based SPY ETF.
QSI has a market cap of $291.12 million. This is considered a Small Cap stock.
Last quarter Quantum-Si - Class A reported $212,000 in Revenue and -$.10 earnings per share. This fell short of revenue expectation by $-62,664 and exceeded earnings estimates by $.02.
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, VXF, IBB, PRFZ.
QSI has underperformed the market in the last year with a return of -26.1%, while SPY returned +9.6%. This shows that you would have done better investing in the overall market (through SPY) over the last year than in QSI shares. However, QSI has outperformed the market in the last 3 month and 2 week periods, returning +75.8% and +15.7%, while SPY returned -4.2% and -3.8%, respectively. This indicates QSI has been having a stronger performance recently.
QSI support price is $1.07 and resistance is $1.27 (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.
