NASDAQ:QSI Quantum-Si (QSI) Stock Price, News & Analysis $0.75 +0.03 (+4.86%) As of 01:17 PM Eastern This is a fair market value price provided by Massive. Learn more. Add Compare Share Share Stock Analysis Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock About Quantum-Si Stock (NASDAQ:QSI) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get Quantum-Si alerts:Sign Up Key Stats Today's Range$0.71▼$0.7650-Day Range$0.70▼$1.2852-Week Range$0.69▼$3.10Volume1.37 million shsAverage Volume4.84 million shsMarket Capitalization$162.67 millionP/E RatioN/ADividend YieldN/APrice Target$1.00Consensus RatingReduce Company Overview Quantum-Si Inc. is a life sciences instrumentation company headquartered in Guilford, Connecticut, developing next-generation proteomics solutions based on semiconductor sequencing technology. The company’s core offering centers on a proprietary single-molecule protein sequencing platform that uses a silicon-based sensor chip to convert protein data into digital signals. This approach is designed to deliver high sensitivity, single-amino-acid resolution and deep proteome coverage while potentially reducing cost and complexity compared to traditional mass spectrometry methods. Quantum-Si’s product roadmap includes the development and commercialization of an integrated system comprising instruments, consumable reagents and proprietary data analysis software. By optimizing its chemical reagents and licensing its chip technology, the company seeks to enable researchers and biopharmaceutical developers to accelerate biomarker discovery, drug target validation and translational proteomics workflows. In addition to instrument sales, Quantum-Si offers research services and collaborative programs to demonstrate its platform in key disease-area applications. Founded in 2017 by a team of scientists and entrepreneurs combining expertise in genomics and semiconductor engineering, Quantum-Si went public through a SPAC merger in mid-2021. Since inception, the company has invested in R&D facilities in Connecticut and established collaborations with academic laboratories and industry partners across North America and Europe. Its platform represents one of the first commercial efforts to leverage semiconductor-based detection for protein sequencing and proteomics research. Under the leadership of President and Chief Executive Officer Steven Tignanelli—formerly CTO at Illumina—Quantum-Si is guided by a management team experienced in instrument development, bioinformatics and regulatory affairs. The company continues to expand manufacturing capabilities and pursue regulatory clearances with the goal of making advanced proteomic tools broadly accessible to research institutions and pharmaceutical companies worldwide. AI Generated. May Contain Errors. Read More Quantum-Si Stock Analysis - MarketRank™See Top-Rated MarketRank™ Stocks44th Percentile Overall ScoreQSI MarketRank™: Quantum-Si scored higher than 44% of companies evaluated by MarketBeat, and ranked 604th out of 893 stocks in the healthcare sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation. Analyst's Opinion3.0 / 5Analyst RatingReduce Consensus RatingQuantum-Si has received a consensus rating of Reduce. The company's average rating score is 1.50, and is based on no strong buy ratings, no buy ratings, 1 hold rating, and 1 sell rating.Upside PotentialQuantum-Si has a consensus price target of $1.00, representing about 33.2% upside from its current price of $0.75.Amount of Analyst CoverageQuantum-Si has only been the subject of 1 research reports in the past 90 days.Read more about Quantum-Si's stock forecast and price target. Earnings and Valuation1.3 / 5Proj. Earnings GrowthGrowing Earnings GrowthEarnings for Quantum-Si are expected to grow in the coming year, from ($0.49) to ($0.48) per share.Price to Earnings Ratio vs. the MarketThe P/E ratio of Quantum-Si is -1.48, 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. SectorThe P/E ratio of Quantum-Si is -1.48, 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 RatioQuantum-Si has a P/B Ratio of 0.74. P/B Ratios below 1 indicate that a company could be undervalued with respect to its assets and liabilities.Read more about Quantum-Si's valuation and earnings. Short Interest3.0 / 5Short Interest LevelHealthy Percentage of Shares Shorted8.32% of the float of Quantum-Si has been sold short.Short Interest Ratio / Days to CoverQuantum-Si has a short interest ratio ("days to cover") of 4.24.Change versus previous monthShort interest in Quantum-Si has recently decreased by 18.79%, indicating that investor sentiment is improving significantly. Dividend0.0 / 5Dividend StrengthN/A Dividend YieldQuantum-Si does not currently pay a dividend.Dividend GrowthQuantum-Si does not have a long track record of dividend growth. News and Social Media0.6 / 5News Sentiment0.00 News Coverage This WeekMarketBeat has tracked 2 news articles for Quantum-Si this week, compared to 2 articles on an average week.Search InterestOnly 4 people have searched for QSI on MarketBeat in the last 30 days. This is a decrease of -78% compared to the previous 30 days.MarketBeat Follows5 people have added Quantum-Si to their MarketBeat watchlist in the last 30 days. This is an increase of 150% compared to the previous 30 days. Company Ownership1.9 / 5Insider TradingSelling Shares Insider Buying vs. Insider SellingIn 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 $56,802.00 in company stock.Percentage Held by Insiders22.04% 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 Institutions39.90% of the stock of Quantum-Si is held by institutions.Read more about Quantum-Si's insider trading history. Receive QSI Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Quantum-Si and its competitors with MarketBeat's FREE daily newsletter. 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QSI Stock News HeadlinesQuantum-Si to Report Second Quarter 2026 Financial Results on August 13, 2026July 27, 2026 | globenewswire.comQuantum-Si Announces Inducement Grants Under Nasdaq Listing Rule 5635(c)(4)June 16, 2026 | businesswire.comReady to give options a try? Your first trade (Ticker included) -INSIDETired of trying tactic after tactic when it comes to options trades... only to be met with market noise and stinging losses? Dave Aquino is giving away the exact 11-hour options strategy he uses in volatile markets. You get the plain English blueprint behind the strategy and the very same "rinse and repeat" ticker he's traded nearly 900 times with a 95.3% success rate. It's so simple to understand, you could trade it tomorrow.August 3 at 1:00 AM | Base Camp Trading (Ad)Quantum-Si Announces the Expansion of the Proteus™ RoadshowJune 3, 2026 | finance.yahoo.comQuantum-Si Announces the Expansion of the Proteus™ RoadshowJune 3, 2026 | businesswire.comIs Quantum-Si (NASDAQ:QSI) In A Good Position To Invest In Growth?June 1, 2026 | finance.yahoo.comQuantum-Si incorporated (QSI) Shareholder/Analyst Call Prepared Remarks TranscriptMay 15, 2026 | seekingalpha.comAlliance Global Partners Sticks to Its Buy Rating for Quantum-Si (QSI)May 14, 2026 | theglobeandmail.comSee More Headlines QSI Stock Analysis - Frequently Asked Questions How have QSI shares performed this year? Quantum-Si's stock was trading at $1.10 at the beginning of the year. Since then, QSI shares have decreased by 31.7% and is now trading at $0.7510. How were Quantum-Si's earnings last quarter? Quantum-Si Incorporated (NASDAQ:QSI) issued its quarterly earnings data on Thursday, May, 7th. The company reported ($0.10) EPS for the quarter, beating analysts' consensus estimates of ($0.12) by $0.02. The firm had revenue of $0.26 million for the quarter, compared to analyst estimates of $0.30 million. Quantum-Si had a negative net margin of 5,605.88% and a negative trailing twelve-month return on equity of 47.35%. 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 Earnings5/07/2026Today8/03/2026Next Earnings (Estimated)8/04/2026Fiscal Year End12/31/2026Get Stock Alerts Health Indicator TradeSmith's Health IndicatorA long-term volatility-based measure designed for securities held 12 months or longer.Green: Strong and healthy uptrend with normal pullbacks.Yellow: Significant pullback but still within expected volatility.Red: Dropped beyond expected volatility; considered unhealthy. Red Zone (5m+) 1-Year History Aug 25 Nov 25 Feb 26 May 26 Aug 26 QSI's financial health is in the Red zone, according to TradeSmith. QSI has been in this zone for over 5 months. Industry, Sector and Symbol Stock ExchangeNASDAQ SectorHealthcare Industry Life Sciences Tools & Services Sub-IndustryLife Sciences Tools & Services Current SymbolNASDAQ:QSI CIK1816431 Webwww.quantum-si.com Phone866-688-7374FaxN/AEmployees150Year Founded2013Price Target and Rating Average Price Target for Quantum-Si$1.00 High Price Target$1.00 Low Price Target$1.00 Potential Upside/Downside+33.2%Consensus RatingReduce Rating Score (0-4)1.50 Research Coverage2 Analysts Profitability EPS (Trailing Twelve Months)($0.51) Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet Income-$101.34 million Net Margins-5,605.88% Pretax Margin-5,609.94% Return on Equity-47.35% Return on Assets-42.66% Debt Debt-to-Equity RatioN/A Current Ratio12.60 Quick Ratio12.40 Sales & Book Value Annual Sales$1.85 million Price / Sales88.30 Cash FlowN/A Price / Cash FlowN/A Book Value$1.02 per share Price / Book0.74Miscellaneous Outstanding Shares217,760,000Free Float169,766,000Market Cap$163.54 million OptionableOptionable Beta3.20 Social Links 7 Stocks to Buy Before the Robotics RevolutionRobotics and automation are rapidly becoming essential infrastructure across healthcare, manufacturing, logistics, and many other industries. "Physical AI" is coming to the United States, and there are four ways that investors can gain exposure to this new robotics revolution. Plus, learn which seven companies are most positioned to benefit as intelligent robots enter the workforce.Get This Free Report This page (NASDAQ:QSI) was last updated on 8/3/2026 by MarketBeat.com Staff. From Our PartnersALERT: Drop these 5 stocks before the market opens tomorrow!The Wall Street Journal is already raising the alarm about a potential market crash, and Weiss Ratings researc...Weiss Ratings | SponsoredLouis Navellier: My #1 AI stock for 2026 (name & ticker inside)Louis Navellier's Stock Grader system helped him flag Nvidia before its 82,000% run and has identified the top...InvestorPlace | SponsoredTrump Takes Emergency Action - Plus Elon Musk's New VentureElon Musk has quietly launched a new venture - one that has nothing to do with rockets, EVs, or Neuralink. Tru...Altimetry | SponsoredReady to give options a try? 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