Quantum-Si Incorporated Class A (QSI)

Quantum-Si's stock price has declined over the past six months, underperforming the S&P500 Index. As of early May 2026, the share price was around $0.90-$0.99. The company reported Q1 2026 revenue of $258,000, a gross profit of $74,000, and a net loss of $21.7 million. Insider trading activity in the past three months has shown both buying and selling, with insiders purchasing a net of $359,375.00 in company stock. Analysts currently have a "Hold" consensus rating for QSI, with an average price target of $3.25.

Quantum-Si's products and services exhibit very little to no demand seasonality, as indicated by a seasonality score of -1. The company has noted slow growth in the academic sector due to NIH funding issues, which can impact demand from that segment.

Quantum-Si, Inc. is a life sciences and proteomics technology company focused on single-molecule protein sequencing, operating in the Healthcare sector, specifically in the Medical Devices and Instruments industry. Its major products include the Platinum and Platinum Pro NGPS instruments, library preparation kits, sequencing kits, and Platinum analysis software. The company is developing the Proteus platform, expected to launch by the end of 2026.

Quantum-Si's headquarters are in Branford, Connecticut, where it has been since 2013, and debuted a new headquarters in June 2023. The company is initiating "Proteus roadshows" to build market awareness across various geographies and end-market segments.

Quantum-Si's brand reputation is characterized by its innovative technology in next-generation protein sequencing, particularly with its Platinum platform and the upcoming Proteus system. The company is actively working to educate the market about its technology through various events. Analysts generally hold a "neutral-to-bullish" sentiment, but the company has experienced a lower news sentiment score. The ongoing development and anticipated launch of the Proteus platform is seen as a significant event, but the company's history of operating losses presents challenges.

Quantum-Si has a diverse ownership structure, including institutional, retail, and individual investors. As of May 2026, 155 institutional owners hold a total of 76,188,255 shares. Individual investors hold a substantial 52% stake in the company. Insiders own approximately 22.04% of the stock, with Jonathan Rothberg being the largest individual shareholder.