Quantum-Si (NASDAQ: QSI) plans 2026 virtual meeting and pay vote
Quantum-Si (NASDAQ: QSI) will hold its fully virtual 2026 annual shareholder meeting on May 15, 2026, at 1:00 p.m. Eastern, where stockholders will vote on electing ten directors, ratifying PricewaterhouseCoopers LLP as auditor, and approving a non-binding advisory say-on-pay for named executive officers. Founder Jonathan M. Rothberg, Ph.D., who beneficially owns all Class B shares, holds approximately 69.33% of the total voting power, effectively controlling the outcome of all proposals. The proxy statement details executive compensation for 2025, outstanding equity awards, and director compensation.
QSIAW Stock Price, News & Analysis
Quantum-Si Incorporated (QSIAW) is a publicly traded company in the Electromedical & Electrotherapeutic Apparatus sector. The stock has seen a significant decline of 66.9% over the past year, with its last traded price at $0.1401. The company reported $2.4M in revenue and a net loss of $101.3M for the trailing twelve months, reflecting substantial negative profit margins.
Quantum-Si (QSI) GC LaPointe sells 11,959 shares to cover RSU taxes
Quantum-Si Inc.'s General Counsel, Christian LaPointe, sold 11,959 shares of Class A Common Stock in mandatory "sell-to-cover" transactions to satisfy tax withholding obligations on vested restricted stock units. These sales, totaling approximately $10,012, were not discretionary investment decisions but rather automatic provisions. Following these transactions, LaPointe continues to hold a substantial 1,198,017 shares directly.
Quantum-Si (QSI) CPO sells 21,997 shares to cover RSU tax
Quantum-Si Chief Product Officer John S. Vieceli reported the mandatory sale of 21,997 shares of Class A common stock. These sales, conducted on March 20 and March 23 at weighted average prices of approximately $0.83–$0.85 per share, were made to cover tax withholding on vested restricted stock units (RSUs). The transactions were executed under a pre-set, unalterable sell-to-cover provision established when the RSUs were granted, and Vieceli still holds over 1.17 million shares after the sale.
Quantum-Si (QSI) CFO’s 8,655-share sale tied to RSU tax withholding
Quantum-Si Inc.'s CFO, Jeffry R. Keyes, sold 8,655 shares of Class A Common Stock across two transactions on March 20 and March 23, with weighted average prices around $0.83 per share. These sales were not discretionary but were mandated by a "sell-to-cover" provision to satisfy federal, state, and local tax withholdings associated with vested restricted stock units. Following these transactions, Keyes directly holds 1,807,345 shares, indicating the sales were a routine tax obligation.
Quantum-Si (NASDAQ: QSI) Form 144: Broker-reported Class A stock sale notice
Quantum-Si Incorporated (NASDAQ: QSI) has filed a Form 144 indicating proposed sales of Class A Common Stock. The filing details a sale of 21,927 shares on December 22, 2025, and also discloses vested equity from restricted stock unit (RSU) vestings of 10,838 shares on March 15, 2024, and 44,271 shares on March 12, 2025. Morgan Stanley Smith Barney LLC is listed as the broker handling these transactions.
Quantum‑Si (NASDAQ: QSI) Form 144 names Morgan Stanley brokered sale
Quantum-Si Incorporated filed a Form 144 notice revealing a proposed sale of 11,959 Class A Common Stock shares through Morgan Stanley Smith Barney LLC on March 20, 2026. The filing also detailed prior restricted stock unit vesting events for 18,063 shares on March 15, 2024, and 26,042 shares on March 12, 2025. Additionally, a past sale of 11,951 shares on December 22, 2025, was reported.
Quantum-Si (QSI) CEO sells 23,777 shares in tax sell-to-cover
Quantum-Si Inc.'s President & CEO, Jeffrey Alan Hawkins, sold a total of 23,777 shares of Class A Common Stock across two transactions on March 20 and March 23, 2026. These sales were mandated "sell-to-cover" provisions to satisfy federal, state, and local tax withholding obligations associated with the vesting of restricted stock units. Following these transactions, Hawkins directly holds 3,859,847 shares of Quantum-Si Class A Common Stock.
Quantum-Si (QSI) affiliate notifies sale of 59,609 Class A shares via MS broker
An affiliate of Quantum-Si Incorporated (QSI) has filed a Form 144, indicating an intended sale of 59,609 Class A Common Stock shares through Morgan Stanley Smith Barney LLC. These shares are linked to a Restricted Stock Unit Vesting event that occurred on March 15, 2024. The filing also disclosed a prior sale of 23,707 shares on December 22, 2025.
Quantum-Si (QSI) CEO receives large stock option and RSU grants
Quantum-Si (QSI) CEO Jeffrey Alan Hawkins received significant equity compensation awards, including a stock option for 1,561,695 shares at an exercise price of $0.976 and 1,305,606 restricted stock units (RSUs). These grants are subject to vesting schedules tied to his continued service, with the options vesting quarterly starting June 20, 2026, and RSUs vesting annually starting April 20, 2027. Following the RSU grant, Hawkins' direct holdings of Class A common stock increased to 3,883,624 shares.
Quantum-Si (QSI) GC granted 261K RSUs and options on 312K shares
Quantum-Si Inc.'s General Counsel and Corporate Secretary, Christian LaPointe, was granted 261,121 Class A common stock in restricted stock units (RSUs) and options to purchase 312,339 shares at an exercise price of $0.976 per share. Both the RSUs and options will vest in equal quarterly installments starting June 20, 2026, contingent on continued service. Following these grants, LaPointe directly holds 1,209,976 shares of Class A common stock.
Quantum-Si (QSI) CFO receives 780,847 options and 652,803 RSUs
Quantum-Si Inc.'s CFO, Jeffry R. Keyes, was granted 780,847 stock options with an exercise price of $0.976 per share, expiring in 2036, and 652,803 restricted stock units (RSUs). These awards are compensation grants, not open-market transactions, and are subject to multi-year vesting schedules contingent on his continued employment. Following these grants, Keyes directly holds 1,816,000 shares of Class A common stock.
Quantum-Si (QSI) CPO Vieceli awarded options and 391,681 RSUs
Quantum-Si Inc.'s Chief Product Officer, John S. Vieceli, was granted new equity awards, including options to purchase 468,508 shares of Class A common stock and 391,681 restricted stock units (RSUs). These awards, effective March 12, 2026, will vest in equal quarterly installments starting June 20, 2026, contingent on his continued service. Following these grants, Vieceli directly holds 1,192,654 shares of Class A common stock, with the awards classified as compensation-related and not open-market transactions.
Kummeth buys Quantum-Si (QSI) shares worth $459,800
Charles R. Kummeth, a director at Quantum-Si Inc. (NASDAQ:QSI), recently purchased 500,000 shares of Class A Common Stock for $459,800, at a weighted average price of $0.9196 per share. This purchase comes as the stock trades near its 52-week low, and an InvestingPro analysis suggests it is undervalued. The company also reported mixed Q4 2025 results, with better-than-expected EPS but lower-than-anticipated revenue, leading Canaccord to lower its price target.
Director Paula Dowdy adds 109,890 Quantum-Si (QSI) shares in open-market buy
Quantum-Si Inc. director Paula Dowdy purchased 109,890 Class A common stock shares in an open-market transaction on March 5, 2026. The shares were bought at a weighted average price of $0.9505, bringing her direct holdings to 269,107 shares. This insider buy indicates a positive sentiment, with transaction prices ranging from $0.9051 to $0.9730 per share.
Director buys 500,000 Quantum-Si (QSI) shares in open-market trade
Quantum-Si Inc director Charles R. Kummeth purchased 500,000 shares of Class A common stock for $0.9196 per share in an open-market transaction on March 5, 2026. This purchase increased his direct holdings to 855,000 shares. The transaction, executed between $0.8906 and $0.9735 per share, indicates a discretionary decision to boost his exposure to the company.
Kummeth buys Quantum-Si (QSI) shares worth $459,800 By Investing.com
Director Charles R. Kummeth of Quantum-Si Inc (QSI) purchased 500,000 shares of Class A Common Stock for $459,800 on March 5, 2026. This acquisition comes as the stock trades near its 52-week low, and an InvestingPro analysis suggests it is undervalued. The company recently reported mixed Q4 2025 results, with EPS beating estimates but revenue falling short, leading Canaccord to lower its price target.
Dowdy Paula, director at Quantum-Si, buys $104,450 in stock By Investing.com
Quantum-Si director Paula Dowdy recently purchased 109,890 shares of Class A Common Stock for $104,450, bringing her total direct ownership to 269,107 shares. This insider buying occurs as QSI stock trades near its 52-week low. The company recently reported mixed Q4 2025 results with an EPS beat but revenue miss, leading Canaccord to lower its price target to $1.00 while maintaining a Hold rating.
Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results
Quantum-Si (Nasdaq: QSI) announced its financial results for the fourth quarter and full year ended December 31, 2025, reporting $451,000 in Q4 revenue and $2.4 million for the full year. The company confirmed an on-track development for its Proteus™ platform, with a list price of $425,000, and provided 2026 financial guidance projecting approximately $1.0 million in revenue, focusing on strategic positioning for the Proteus launch. Despite expected tempered near-term revenue due to placement programs and upgrade credits, Quantum-Si believes these actions will lead to a stronger Proteus launch and long-term shareholder value.
Quantum-Si Shares Slip After Q4 Revenue Miss
Quantum-Si (NASDAQ: QSI) shares dropped in extended trading after the company missed Street revenue estimates for its fourth quarter. The company reported a loss of 8 cents per share, beating estimates, but revenue came in at $451,000 against an estimated $762,000. Quantum-Si also projected fiscal 2026 revenue of $1 million, well below analyst estimates of $7.15 million.
[8-K] Quantum-Si Inc Reports Material Event | QSI SEC Filing - Form 8-K
Quantum-Si Incorporated reported its financial results for the fourth quarter and full year 2025, showing wider full-year losses but decreased adjusted operating expenses. The company announced the list price for its next-generation Proteus platform at $425,000, targeting a launch by the end of 2026, and provided 2026 revenue guidance of approximately $1.0 million, reflecting a strategic moderation as it prepares for the Proteus launch. Despite tempered near-term revenue, the company's cash reserves of $215.8 million are expected to fund operations into the second quarter of 2028.
Examining the Future: Quantum-Si's Earnings Outlook
Quantum-Si (NASDAQ: QSI) is set to release its quarterly earnings, with analysts expecting an EPS of $-0.13. The company has a history of missing EPS estimates, which has negatively impacted its stock price. Investors will be looking for positive guidance, especially given the company's negative stock performance over the past year and its current financial metrics like market capitalization and revenue growth challenges.
Earnings Breakdown: Quantum-Si Q4
Quantum-Si (NASDAQ: QSI) announced its Q4 earnings on Tuesday, March 3, 2026, beating estimated earnings by 38.46% with an EPS of $-0.08 against an estimate of $-0.13. Despite the beat, revenue was down $741 thousand from the previous year. The company's stock previously dropped by 8.33% after missing EPS estimates in the last quarter.
Director Amir Jafri granted 114,055 Quantum-Si (QSI) stock options
Quantum-Si Inc. director Amir Jafri was granted 114,055 stock options on Class A Common Stock with an exercise price of $0.00 per share. These options will vest in equal monthly installments starting March 31, 2026, contingent upon his continued service. Following this transaction, Jafri directly holds 115,942 Class A shares, in addition to the newly acquired stock options.
Highcape Capital $7.6M Securities Class Action Settlement
A $7.6 million class action settlement has been reached with HighCape Capital LP and related defendants over allegations of false and misleading statements and breach of fiduciary duties concerning its business combination with Quantum-Si Inc. Investors who held HighCape Class A common stock between May 10, 2021, and June 10, 2021, may be eligible to claim a cash payment. The deadline to file a claim is May 7, 2026, and the amount each class member receives will depend on several factors, including the number of valid claims and shares held.
Quantum-Si Incorporated Announces the Release of Two New Manuscripts Demonstrating the Value of Single-Molecule Protein Sequencing in Clinical Proteomics and Pathogen & Toxin Detection
Quantum-Si Incorporated has announced the release of two new manuscripts highlighting the utility of its single-molecule protein sequencing technology. One paper, published in the Journal of Analytical Chemistry, demonstrates the technology's effectiveness in identifying clinically relevant hemoglobin variants. The company believes this advancement positions its protein sequencing technology as a valuable tool for clinical proteomics and hemoglobinopathy research.
Quantum-Si (NASDAQ:QSI) adds US$32m to market cap in the past 7 days, though investors from five years ago are still down 88%
Quantum-Si (NASDAQ:QSI) experienced a 14% share price climb in the past week, adding US$32 million to its market capitalization. However, long-term investors from five years ago are still down by 88%. Despite strong revenue growth of 77% per year over the last five years, the stock has underperformed, leading to questions about its long-term recovery potential.
Hawkins, Quantum-Si CEO, sells $30k in shares By Investing.com
Jeffrey Alan Hawkins, President and CEO of Quantum-Si Inc (NASDAQ:QSI), sold 23,707 shares for a total of $30,250 on December 22, 2025. This sale was a mandatory sell-to-cover provision for tax purposes related to restricted stock units. Quantum-Si recently reported a larger-than-expected Q3 2025 loss and is progressing with its Proteus protein analysis platform, with H.C. Wainwright reiterating a "Buy" rating.
Hawkins, Quantum-Si CEO, sells $30k in shares
Jeffrey Alan Hawkins, President and CEO of Quantum-Si Inc. (NASDAQ:QSI), sold 23,707 shares of Class A Common Stock for approximately $30,250 on December 22, 2025. This sale was a mandatory "sell-to-cover" provision for tax withholding related to restricted stock units. The company recently reported a larger-than-expected Q3 2025 loss and revenue shortfall but is progressing with its Proteus protein analysis platform.
Quantum-Si Announces Launch of New Version 3 Library Preparation Kit and a Suite of Data Analysis Tool Enhancements
Quantum-Si Incorporated (Nasdaq: QSI) has launched its Version 3 Library Preparation Kit and a new suite of data analysis tool enhancements, significantly improving protein analysis. The new kit requires 100-fold less protein input and enables detection of proteins with as little as 1-2 ng, greatly benefiting scarce biologic sample processing. These advancements allow for better detection of low abundance biomarkers and expand amino acid coverage to 15, with a goal of all 20 by 2026.
Vieceli, Quantum-Si CPO, sells $28k in shares
John S. Vieceli, Chief Product Officer of Quantum-Si Inc (NASDAQ:QSI), sold 21,927 shares for approximately $27,978 on December 22, 2025, to cover tax obligations related to restricted stock units. Despite this, he still directly owns 800,973 shares. While the company holds more cash than debt, it is quickly burning through cash and is not profitable yet, though it is considered slightly undervalued by InvestingPro analysis.
LaPointe, Quantum-Si GC, sells $15k in QSI stock
Christian LaPointe, General Counsel & Corp. Secretary at Quantum-Si Inc (NASDAQ:QSI), sold 11,951 shares of Class A Common Stock for approximately $15,249 to cover tax obligations related to restricted stock units. This sale comes as Quantum-Si reported third-quarter 2025 earnings below analyst expectations but continues to make progress in product development with the launch of a new preparation kit and the Proteus platform prototype. H.C. Wainwright maintains a Buy rating on QSI, citing the potential of the Proteus system.
Hawkins, Quantum-Si CEO, sells $30k in shares
Jeffrey Alan Hawkins, President and CEO of Quantum-Si Inc. (NASDAQ:QSI), sold 23,707 shares of Class A Common Stock for approximately $30,250 on December 22, 2025, to cover tax obligations. This transaction comes amidst recent company news including a third-quarter earnings miss and advancements in its Proteus protein analysis platform, which is expected to launch commercially by the end of 2026. H.C. Wainwright maintained a Buy rating on Quantum-Si with a $4.00 price target.
Vieceli, Quantum-Si CPO, sells $28k in shares
John S. Vieceli, Chief Product Officer of Quantum-Si Inc (NASDAQ:QSI), sold 21,927 shares for approximately $27,978 on December 22, 2025. The sale was executed to cover withholding taxes related to vested restricted stock units, and Vieceli still directly owns 800,973 shares. Quantum-Si is experiencing rapid cash burn and is not profitable, although it holds more cash than debt.
Is Quantum-Si (NASDAQ:QSI) In A Good Position To Invest In Growth?
Quantum-Si (NASDAQ:QSI) is being evaluated on its cash burn and growth prospects. The company has a cash runway of 2.1 years, based on its US$226m cash reserves and US$105m annual cash burn. While its cash burn increased by 19% year-on-year, revenue grew by 40%, indicating improving business performance.
Quantum-Si Highlights Significant Development Advancements for Proteus and Industry Leading Technology Pipeline at Investor & Analyst Day
Quantum-Si announced significant advancements for its Proteus platform and technology pipeline during its Investor & Analyst Day. Key highlights include the Proteus platform being on track for an end-of-2026 launch with initial coverage of 18 amino acids, and a new controlled cleavage sequencing chemistry enabling billions of sequencing reads. The company also expects to demonstrate detection of all 20 amino acids in 2026, aiming to redefine protein analysis.
Quantum-Si Incorporated (QSI) Reports Q3 Loss, Lags Revenue Estimates
Quantum-Si Incorporated (QSI) reported a Q3 loss of $0.17 per share, which was in line with Zacks Consensus Estimate but missed revenue estimates by 3.16%, bringing in $0.55 million against an expected $0.57 million. The company's stock has underperformed the S&P 500 year-to-date, and its Zacks Rank is currently #3 (Hold), indicating an expectation to perform in line with the market. Investors await management's commentary on the earnings call for insights into future price movements.
Both retail investors who control a good portion of Quantum-Si incorporated (NASDAQ:QSI) along with institutions must be dismayed after last week's 13% decrease
Quantum-Si Incorporated (NASDAQ:QSI) saw a 13% stock decrease last week, negatively impacting both retail investors (55% ownership) and institutional holders (27%). While institutions experienced pressure from a market cap drop, retail investors bore the brunt of the losses. Insider ownership, particularly by Jonathan Rothberg, is significant, suggesting a positive alignment of interests between leadership and shareholders, despite broader ownership being fragmented among many small holders.
Quantum-Si incorporated's (NASDAQ:QSI) 21% loss last week hit both individual investors who own 49% as well as institutions
Quantum-Si incorporated (NASDAQ:QSI) experienced a 21% stock price decrease last week, significantly impacting both its individual investors, who collectively own 49% of the company, and institutional investors, who hold 28%. The largest shareholder is Jonathan Rothberg, a key executive, with 17% ownership, indicating significant insider holding and alignment with shareholders. Despite the decline, the stock has some analyst coverage, suggesting potential for increased attention in the future.
Quantum-Si Reports Third Quarter 2025 Financial Results
Quantum-Si (Nasdaq: QSI) announced its financial results for the third quarter ended September 30, 2025. The company reported revenue of $552,000, with a net loss of $35.7 million for the quarter. Key highlights include successful sequencing runs on a prototype Proteus system, an instrument placement program to expand academic customer access, and the upcoming Investor and Analyst Day on November 19, 2025.
Rothberg, director at Quantum-Si, sells $80,111 in stock By Investing.com - Investing.com UK
Jonathan M. Rothberg, a director and ten percent owner of Quantum-Si Inc (NASDAQ:QSI), sold 26,095 shares of Class A Common Stock for approximately $80,111 on October 16, 2025. This sale was conducted pursuant to a pre-arranged 10b5-1 trading plan established for estate planning purposes. Despite the sale, Rothberg retains significant indirect and direct ownership in the company.
Rothberg, director at Quantum-Si, sells $80,111 in stock By Investing.com - Investing.com Nigeria
This article reports on an application error encountered while attempting to load content regarding a stock sale by Rothberg, a director at Quantum-Si. The intended content was to detail the sale of $80,111 in stock. Due to the error, no further details about this transaction are available.
Rothberg, director at Quantum-Si, sells $80,111 in stock - Investing.com India
Jonathan M. Rothberg, a director at Quantum-Si Inc (NASDAQ:QSI), sold 26,095 shares for approximately $80,111 on October 16, 2025, as part of a pre-arranged 10b5-1 trading plan for estate planning. Despite the sale occurring above the current market price, QSI has shown significant volatility and strong momentum, gaining over 98% in the past six months. Rothberg retains a substantial indirect and direct ownership in the company.
Quantum-Si to Report Third Quarter 2025 Financial Results on November 5, 2025 - MarketScreener
Quantum-Si Incorporated announced it will report its third-quarter 2025 financial results on Wednesday, November 5, 2025. The company's President and CEO, Jeff Hawkins, along with CFO Jeff Keyes, will host a conference call to discuss the results and provide a business update. Quantum-Si is a proteomics technology company focused on single-molecule protein analysis.
Why Quantum-Si Stock Flopped on Friday
Quantum-Si's stock fell nearly 5% on Friday after the company filed a shelf registration statement indicating its intention to raise up to $300 million through the issuance of various securities. Investors are concerned that a significant capital raise, especially through equity, could dilute existing shares given the company's current market cap of $336 million. The healthcare technology company specializing in protein sequencing stated that it retains broad discretion over the use of these proceeds, including for product development, commercialization, and administrative expenses.
Quantum-Si enters $100 million at-the-market sales agreement with Leerink Partners
Quantum-Si (NASDAQ:QSI) has announced a sales agreement with Leerink Partners LLC to potentially sell up to $100 million of its Class A common stock through at-the-market offerings. The company, valued at $282.48 million, retains the discretion to sell shares and can suspend or terminate the agreement at any time, with Leerink Partners receiving up to 3.0% commission on gross proceeds. This announcement follows a recent stock decline and precedes the release of their new V4 Sequencing Kit, which aims to enhance protein analysis capabilities.
Quantum-Si Terminates Lease Agreement with Winchester Office
Quantum-Si (QSI) has terminated its lease agreement with Winchester Office LLC for its New Haven, CT premises, which was originally set to expire in 2032. The company will pay an $11 million termination fee, adjusted for credits, and will have no further rent obligations after September 23, 2025. Spark, TipRanks' AI Analyst, rated QSI as "Neutral" due to consistent losses, negative cash flows, and weak valuation metrics, despite some bullish technical indicators.
Quantum-si GC Lapointe sells shares worth $17,795
Christian LaPointe, General Counsel and Corporate Secretary of Quantum-Si Inc (NASDAQ:QSI), sold 10,728 shares of Class A Common Stock for a total of $17,795 on September 22 and 23, 2025. These sales were executed in two tranches to cover tax withholdings related to vested restricted stock units. Following these transactions, LaPointe directly owns 960,806 shares of the company, which recently reported mixed Q2 2025 earnings and released a new V4 Sequencing Kit.
Quantum-Si Incorporated (QSI) Stock Price | Live Quotes & Charts | NASDAQ
This page provides live quotes and charts for Quantum-Si Incorporated (QSI) stock, currently trading at $1.44. It notes a lack of analyst ratings and earnings information for the company. The page also features advertising for stock trading algorithms and educational content.
QSIAW SEC Filings - Quantum-Si Incorporated 10-K, 10-Q, 8-K Forms
This page provides a comprehensive resource for Quantum-Si Incorporated (QSIAW) SEC filings, including 10-K, 10-Q, 8-K, and insider trading forms. It features AI-generated summaries, sentiment and impact scores from Rhea-AI, and end-of-day stock performance data for each filing. The article highlights two recent filings: a stock option grant to director Amir Jafri and an insider filing by Jonathan M. Rothberg detailing his holdings and a 10b5-1 trading plan.
