Quantum-Si (QSI) Stock Price, News & Analysis

Company Overview

Quantum-Si, Inc. (NASDAQ: QSI) is a life sciences technology company focused on the development of next-generation protein sequencing and characterization platforms. Founded in 2017 and headquartered in Guilford, Connecticut, the company has built a proprietary platform designed to enable researchers to sequence proteins at the single-molecule level. By combining microfluidics, advanced quantum sensor technologies and machine learning algorithms, Quantum-Si seeks to advance the field of proteomics with enhanced sensitivity and throughput compared to traditional mass spectrometry methods.

The core offering from Quantum-Si is the Infinity™ platform, which integrates sample preparation, fluidics control and a high-resolution quantum semiconductor detector. This system is intended to provide detailed protein identity and abundance data, empowering drug discovery, biomarker research and basic biological studies. Quantum-Si’s technology aims to tackle challenges such as low-abundance protein detection, post-translational modification mapping and complex sample analysis, supporting a broad range of applications in pharmaceutical R&D and clinical proteomics.

Quantum-Si collaborates with academic institutions, biotechnology firms and pharmaceutical companies worldwide, with customers and partners across North America, Europe and the Asia-Pacific region. The company has established strategic alliances for co-development projects, pilot studies and technology evaluations, positioning its platform as a complementary tool for existing proteomic workflows. Quantum-Si also offers reagent kits, consumables and technical support services to accelerate adoption and integration of its technology in research laboratories.

Leadership at Quantum-Si includes President and Chief Executive Officer Steve Rasmussen, who brings extensive experience in genomics and life science instrumentation, and Chief Financial Officer Mark Soudie. Under their guidance, the company has transitioned from early development into commercial readiness, expanding its engineering, operations and customer success teams. Quantum-Si continues to invest in R&D, manufacturing scale-up and global customer engagement to drive the next wave of proteomic innovation.

Key Stats

• Today's Range: $1.81 to $1.95
• 50-Day Range: $1.14 to $2.08
• 52-Week Range: $0.61 to $5.77
• Volume: 16.54 million shs
• Average Volume: 11.32 million shs
• Market Capitalization: $335.81 million
• P/E Ratio: N/A
• Dividend Yield: N/A
• Price Target: $3.48
• Consensus Rating: Moderate Buy

Quantum-Si Stock Analysis - MarketRank™

Quantum-Si scored higher than 46% of companies evaluated by MarketBeat, and ranked 405th out of 653 stocks in the computer and technology sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation.

Analyst's Opinion

• Score: 3.3 / 5
• Analyst Rating: Moderate Buy

Consensus Rating

Quantum-Si has received a consensus rating of Moderate Buy. The company's average rating score is 2.67, and is based on 2 buy ratings, 1 hold rating, and no sell ratings.

Amount of Analyst Coverage

Quantum-Si has only been the subject of 2 research reports in the past 90 days.

Earnings and Valuation

• Score: 0.0 / 5
• Proj. Earnings Growth: Decreasing

Earnings Growth

Earnings for Quantum-Si are expected to decrease in the coming year, from ($0.65) to ($0.75) per share.

Price to Earnings Ratio vs. the Market

The P/E ratio of Quantum-Si is -2.69, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.

Price to Earnings Ratio vs. Sector

The P/E ratio of Quantum-Si is -2.69, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.

Price to Book Value per Share Ratio

Quantum-Si has a P/B Ratio of 1.42. P/B Ratios below 3 indicates that a company is reasonably valued with respect to its assets and liabilities.

Short Interest

• Score: 3.0 / 5
• Short Interest Level: Healthy

Percentage of Shares Shorted

17.52% of the float of Quantum-Si has been sold short.

Short Interest Ratio / Days to Cover

Quantum-Si has a short interest ratio ("days to cover") of 3.4, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in Quantum-Si has recently decreased by 1.37%, indicating that investor sentiment is improving.

Dividend

• Score: 0.0 / 5
• Dividend Strength: N/A

Dividend Yield

Quantum-Si does not currently pay a dividend.

Dividend Growth

Quantum-Si does not have a long track record of dividend growth.

Sustainability and ESG

• Score: N/A
• Environmental Score: N/A

Percentage of Shares Shorted

17.52% of the float of Quantum-Si has been sold short.

Short Interest Ratio / Days to Cover

Quantum-Si has a short interest ratio ("days to cover") of 3.4, which is generally considered an acceptable ratio of short interest to trading volume.

Change versus previous month

Short interest in Quantum-Si has recently decreased by 1.37%, indicating that investor sentiment is improving.

News and Social Media

• Score: 1.7 / 5
• News Sentiment: 0.13

News Sentiment

Quantum-Si has a news sentiment score of 0.13. This score is calculated as an average of sentiment of articles about the company over the last seven days and ranges from 2 (good news) to -2 (bad news). This is a lower news sentiment than the 0.66 average news sentiment score of Computer and Technology companies.

News Coverage This Week

MarketBeat has tracked 8 news articles for Quantum-Si this week, compared to 3 articles on an average week.

Search Interest

Only 12 people have searched for QSI on MarketBeat in the last 30 days. This is a decrease of -70% compared to the previous 30 days.

MarketBeat Follows

Only 8 people have added Quantum-Si to their MarketBeat watchlist in the last 30 days. This is a decrease of -47% compared to the previous 30 days.

Company Ownership

• Score: 2.5 / 5
• Insider Trading: Selling Shares

Insider Buying vs. Insider Selling

In the past three months, Quantum-Si insiders have sold more of their company's stock than they have bought. Specifically, they have bought $0.00 in company stock and sold $87,346.00 in company stock.

Percentage Held by Insiders

22.95% of the stock of Quantum-Si is held by insiders. A high percentage of insider ownership can be a sign of company health.

Percentage Held by Institutions

Only 39.90% of the stock of Quantum-Si is held by institutions.

QSI Stock Analysis - Frequently Asked Questions

How have QSI shares performed this year?

Quantum-Si's stock was trading at $2.70 at the beginning of 2025. Since then, QSI stock has decreased by 32.2% and is now trading at $1.83.

How were Quantum-Si's earnings last quarter?

Quantum-Si Incorporated (NASDAQ:QSI) announced its quarterly earnings data on Thursday, May, 15th. The company reported ($0.11) EPS for the quarter, beating analysts' consensus estimates of ($0.17) by $0.06. The company had revenue of $0.84 million for the quarter, compared to analyst estimates of $0.96 million. Quantum-Si had a negative trailing twelve-month return on equity of 41.44% and a negative net margin of 2,925.41%.
Read the conference call transcript.

How do I buy shares of Quantum-Si?

Shares of QSI stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services.

What other stocks do shareholders of Quantum-Si own?

Based on aggregate information from My MarketBeat watchlists, some other companies that Quantum-Si investors own include Digital Turbine (APPS), Archer Aviation (ACHR), SoFi Technologies (SOFI), ChargePoint (CHPT) and Canoo (GOEV).

Company Calendar

• Last Earnings: 5/15/2025
• Today: 7/07/2025
• Next Earnings (Estimated): 8/06/2025
• Fiscal Year End: 12/31/2025

Industry, Sector and Symbol

• Stock Exchange: NASDAQ
• Sector: Computer and Technology
• Industry: ELEC COMP - SEMIC
• Sub-Industry: Measuring And Control Equipment
• Current Symbol: NASDAQ:QSI
• CIK: 1816431
• Web: www.quantum-si.com
• Phone: 866-688-7374
• Fax: N/A
• Employees: 150
• Year Founded: N/A

Price Target and Rating

• Average Stock Price Target: $3.48
• High Stock Price Target: $5.50
• Low Stock Price Target: $1.00
• Potential Upside/Downside: +89.9%
• Consensus Rating: Moderate Buy
• Rating Score (0-4): 2.67
• Research Coverage: 3 Analysts

Profitability

• EPS (Trailing Twelve Months): ($0.68)
• Trailing P/E Ratio: N/A
• Forward P/E Ratio: N/A
• P/E Growth: N/A
• Net Income: -$101.01 million
• Net Margins: -2,925.41%
• Pretax Margin: -2,923.47%
• Return on Equity: -41.44%
• Return on Assets: -37.09%

Debt

• Debt-to-Equity Ratio: N/A
• Current Ratio: 19.24
• Quick Ratio: 18.89

Sales & Book Value

• Annual Sales: $3.06 million
• Price / Sales: 109.74
• Cash Flow: N/A
• Price / Cash Flow: N/A
• Book Value: $1.29 per share
• Price / Book: 1.42

Miscellaneous

• Outstanding Shares: 183,500,000
• Free Float: 141,385,000
• Market Cap: $335.81 million
• Optionable: Optionable
• Beta: 2.89