Quantum-Si Incorporated Class A (QSI)

Quantum-Si's stock price has experienced volatility and a decline in the past six months. Key events impacting the stock include the Q3 2025 earnings call, Investor & Analyst Day, the launch of the V4 Sequencing Kit, Q4 and full-year 2025 financial results, capital raises, and a period of "Quantum Hype" where the stock was mistakenly associated with quantum computing.

Demand for Quantum-Si's products and services is influenced by academic funding cycles and year-end budgeting. Management has acknowledged challenges with NIH funding impacting capital sales from U.S. academic labs. Fourth-quarter revenue momentum in 2024 was partly impacted by year-end pricing incentives and customers closing out their budgets. Quantum-Si has introduced expanded instrument acquisition options to address capital purchasing challenges.

Quantum-Si, Inc. is a life sciences company focused on making protein sequencing widely accessible through its next-generation protein sequencing (NGPS) technology. The company operates in the Healthcare sector, specifically in the Life Sciences Tools and Services industry. Its major products include Platinum and Platinum Pro NGPS Instruments, consumable kits, Platinum Analysis Software, and the upcoming Proteus Platform.

Quantum-Si, Inc. is headquartered in Branford, Connecticut, United States. The company has expanded internationally with a distributor network across Europe, Asia Pacific, and South America, with international sales constituting 71.3% of its revenue in 2025.

Quantum-Si is perceived as a pioneering company in proteomics, aiming to revolutionize protein analysis. Its technology is recognized for enabling direct protein sequencing at the single-molecule level. The company holds over 400 patents. The company's stock performance has been influenced by factors such as being mistakenly associated with "quantum computing".

Quantum-Si's ownership structure includes institutional, insider, and retail investors. Approximately 28.76% of the company's stock is owned by Institutional Investors, 21.75% by Insiders, and 49.49% by Public Companies and Individual Investors. Major institutional owners include BlackRock, Inc., Vanguard Group Inc, and ARK Investment Management LLC. The largest individual shareholder is Jonathan M. Rothberg.