Quantum-Si Incorporated Class A (QSI)

Quantum-Si's stock price has experienced fluctuations in the past six months. In June 2025, stocks traded down amid market reactions to company developments. In July 2025, the company filed a Follow-on Equity Offering for approximately $49.999999 million. In September 2025, stocks traded up following positive news, including the launch of the V4 Sequencing Kit. In October 2025, the stock was trading at $1.77, showing significant volatility over the past year. As of November 26, 2025, the stock price was $1.35 per share, decreasing by 43.28% over the past month. The 50-day moving average moved above the 200-day moving average on October 29, 2025, which could be a long-term bullish signal.

Information regarding the specific demand seasonality for Quantum-Si, Inc.'s products and services is not explicitly available in the provided search results.

Quantum-Si, Inc. is a biotechnology company focused on revolutionizing proteomics through its semiconductor chip-based technology. The company develops a universal single-molecule detection platform for Next-Generation Protein Sequencing (NGPS), enabling massively parallel protein sequencing. Quantum-Si operates primarily in the Life Sciences Tools & Services industry within the Healthcare sector. The company's major products include the Platinum NGPS instrument, Platinum Pro NGPS instrument, Consumables and Reagents, and Platinum Analysis Software, which are utilized in various applications such as antibody characterization, biomarker identification, and post-translational modification analysis.

Quantum-Si has a growing global presence, having expanded its international distribution network to 15 partners, including increased reach in Western and Eastern Europe, Asia, and new markets in the Middle East, Africa, South America, and the South Pacific. In North America, the company has a distribution agreement with Avantor. The company's headquarters are located in Branford, Connecticut, USA.

Quantum-Si's brand reputation appears to be positively influenced by its advancements and product launches. The launch of new products like the Platinum Library Prep Kit, V2, the Protein Barcoding Kit, and the V4 Sequencing Kit have been highlighted as significant advancements. Analyst ratings have been largely positive. Concerns about liquidity and financial stability have also been noted in market activity reports, which can implicitly influence market perception and investor sentiment.

Quantum-Si, Inc. has a diverse ownership structure comprising institutional, insider, and retail investors. Institutional investors hold approximately 9.77% to 29.96% of the company's stock. Individual investors hold a substantial stake, with some reports indicating around 50.30% to 52% of the shares. Insiders own a significant portion, approximately 21.57% to 47.56% of the stock. Jonathan M. Rothberg, the company's founder and Executive Director, is the largest individual shareholder.