Director Paula Dowdy receives 251,185 options at Quantum-Si (QSI)
Quantum-Si director Paula Dowdy was granted 251,185 stock options for Class A Common Stock with an exercise price of $0.8539 per share, expiring on May 18, 2036. These options will vest on the date of the company's next annual stockholders meeting, contingent on her continued service. Following this transaction, Dowdy directly owns 269,107 shares of Class A Common Stock.
Quantum-Si (QSI) grants 251K stock options to director Scott Mendel
Quantum-Si Inc. director Scott Mendel was granted 251,185 stock options to purchase Class A Common Stock at an exercise price of $0.8539 per share, expiring on May 18, 2036. These options will vest on the date of the company's next annual stockholders meeting, contingent on his continued service. Following this transaction, Mendel directly holds 141,843 shares of Class A Common Stock and 251,185 options.
Quantum-Si (QSI) director receives 251,185 stock options as equity grant
Quantum-Si Inc. director Ruth A. Fattori was granted 251,185 stock options for Class A Common Stock, with an exercise price of $0.8539 per share and an expiration date of May 18, 2036. These options vest on the date of the company's next annual stockholders meeting, contingent on her continued service. Following this transaction, Fattori directly holds 170,512 shares of Class A Common Stock.
Quantum-Si (QSI) director awarded 251,185 stock options expiring 2036
Quantum-Si Inc. director Charles R. Kummeth was granted 251,185 stock options at an exercise price of $0.8539 per share, expiring on May 18, 2036. The shares underlying these options will vest at the company's next annual stockholders meeting, contingent on his continued service. This award is compensation-related and increases his direct holdings to 855,000 shares of Class A Common Stock in addition to the new options.
Quantum-Si (QSI) director awarded 251,185 options at $0.8539 strike
Jonathan M. Rothberg, a director and 10% owner of Quantum-Si Inc., was granted 251,185 stock options at an exercise price of $0.8539 per share. These options vest upon the company's next annual stockholders meeting, subject to his continued service, and expire on May 18, 2036. Following this grant, Rothberg's direct holdings amount to 2,568,443 Class A Common Stock shares, with additional indirect holdings through various LLCs.
Quantum-Si (QSI) director Brigid Makes receives 251,185 stock options grant
Quantum-Si Inc. director Brigid Makes was granted 251,185 stock options to buy Class A Common Stock at an exercise price of $0.8539 per share, expiring May 18, 2036. These options will vest on the date of the company's next annual stockholders meeting, contingent on her continued service. Following this transaction, Ms. Makes directly holds 20,512 shares of Class A Common Stock in addition to the newly granted options.
Quantum-Si shareholders reelect board, approve auditor and executive pay
Quantum-Si Inc. shareholders reelected all ten director nominees, ratified PricewaterhouseCoopers LLP as their independent auditor, and approved executive compensation during their recent annual meeting. This occurred amidst operational challenges for the company, including a 37% stock price decline over the past year and a 46% revenue decrease, despite exceeding Q1 2026 earnings and revenue expectations.
Quantum-Si shareholders reelect board, approve auditor and executive pay
Quantum-Si Inc. (NASDAQ:QSI) shareholders reelected all ten director nominees, approved PricewaterhouseCoopers LLP as the independent auditor, and endorsed executive compensation at their annual meeting. These decisions come as the company faces operational challenges, including a 37% stock price drop over the past year and a 46% revenue decline, despite recently surpassing Q1 2026 earnings and revenue expectations.
Quantum-Si Inc stock (US7491641091): Q1 2026 earnings spotlight Proteus platform progress
Quantum-Si Inc (QSI) reported its Q1 2026 earnings, emphasizing significant progress in its Proteus platform development and its strategy in proteomics research tools. The company’s focus is on next-generation protein sequencing technology, aiming to create a hardware-consumables-software ecosystem for academic, biopharmaceutical, and clinical research. While the stock's valuation reflects expectations for future growth, the company acknowledges typical risks associated with early-stage life sciences technology firms.
Quantum Si incorporated : Quarterly Report for Quarter Ending March 31, 2026 (Form 10-Q)
Quantum-Si Incorporated reported its Q1 2026 earnings, showing a significant decrease in total revenue by 69.4% compared to Q1 2025, primarily due to customers delaying purchases in anticipation of the Proteus platform launch. The company continues to invest heavily in research and development, particularly for the upcoming Proteus next-generation protein sequencing platform, anticipated to launch by the end of 2026. Despite a net loss, the company maintains sufficient liquidity with $190.4 million in cash and marketable securities, expecting these to fund operations for at least the next 12 months.
Quantum-Si (NASDAQ: QSI) Q1 2026 results and Proteus launch plans
Quantum-Si (NASDAQ: QSI) reported its Q1 2026 financial results, with revenues of $258,000 and a net loss of $21.7 million, as the company continues to invest heavily in its Proteus single-molecule protein sequencing system. The company reiterated its full-year 2026 guidance, focusing on the anticipated commercial launch of Proteus by the end of 2026. Quantum-Si maintains a strong cash position of $190.4 million, expected to fund operations into Q2 2028.
Here's Why We're Watching Quantum-Si's (NASDAQ:QSI) Cash Burn Situation
Quantum-Si (NASDAQ:QSI) has a cash runway of about 20 months based on its current burn rate of US$97m against US$163m in cash. The company's cash burn increased by 5.2% year-on-year, and operating revenue decreased by 20%, raising concerns about its development. Furthermore, its cash burn represents 47% of its market capitalization, suggesting potential significant shareholder dilution if more capital is needed.
Quantum-Si CFO Jeffry Keyes sells $74,815 in company stock.
Quantum-Si CFO Jeffry Keyes sold $74,815 worth of Class A Common Stock over two days in April 2026, representing shares sold to cover withholding taxes from restricted stock unit vesting. Following these mandatory transactions, Mr. Keyes directly holds 1,732,582 shares. The company recently reported mixed Q4 2025 financial results and announced a multi-city roadshow for its Proteus protein sequencing platform.
Quantum-Si (QSI) CEO sells 167,424 shares in tax-related trades
Quantum-Si's President & CEO, Jeffrey Alan Hawkins, sold a total of 167,424 Class A Common Stock shares in two separate transactions on April 20 and April 21, 2026. These sales were mandatory "sell-to-cover" provisions to satisfy tax withholding obligations arising from the vesting of previously granted restricted stock units. After these transactions, Hawkins still directly holds 3,692,423 shares of Quantum-Si.
Quantum-Si (QSI) CFO sells 74,763 shares to cover RSU taxes
Quantum-Si Inc.'s Chief Financial Officer, Jeffry R. Keyes, sold a total of 74,763 shares of Class A Common Stock across April 20 and April 21, 2026. These sales were mandatory "sell-to-cover" provisions to satisfy federal, state, and local withholding taxes associated with vesting restricted stock units (RSUs). After these transactions, Keyes directly owns 1,732,582 Class A shares.
Quantum-Si (QSI) RSU vesting triggers 187,500-share proposed sale
Quantum-Si Incorporated has filed a Form 144 notice for the proposed sale of 187,500 shares of Class A Common Stock. This sale is linked to the vesting of Restricted Stock Units on April 22, 2026, and is described as equity compensation for services rendered. The filing also reports an earlier sale of 8,655 shares on March 20, 2026, by Morgan Stanley Smith Barney LLC.
RSU sale notice for Quantum-Si (NASDAQ: QSI) — 416,667 Class A shares
Quantum-Si Incorporated has filed a Form 144 notice indicating a proposed sale of 416,667 Class A Common Stock shares related to a Restricted Stock Unit (RSU) vesting event on April 22, 2026. This filing also disclosures a prior sale of 23,777 shares on March 20, 2026. Morgan Stanley Smith Barney LLC is listed as the broker for these transactions.
Quantum-Si president & CEO Jeffrey Hawkins sells $167,541 in shares
Jeffrey Alan Hawkins, President and CEO of Quantum-Si Inc, sold 167,424 shares of Class A Common Stock for approximately $167,541 across two recent transactions. These sales were mandatory "sell-to-cover" provisions for tax withholding related to previously granted restricted stock units, and Mr. Hawkins still holds over 3.6 million shares directly. The company's stock has been volatile, and Quantum-Si recently reported mixed Q4 2025 results, with an EPS beat but a revenue miss.
Quantum-Si Incorporated Tests First Customer Samples on Proteus Prototype System
Quantum-Si Incorporated has announced that it successfully sequenced customer samples using its Proteus prototype system, comparing the results to its Platinum Pro system. The Proteus prototype, utilizing a developmental sequencing kit, showed significant improvements over Platinum Pro in metrics such as amino acid coverage, read length, peptide identification, and sequencing output. These findings align with information previously shared at the company's Investor and Analyst Day in November 2025, emphasizing the enhanced performance of the Proteus platform.
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.
Morgan Stanley Smith Barney to sell QSI (NASDAQ: QSI) Class A shares
Morgan Stanley Smith Barney LLC has filed a Form 144 notice indicating its intent to sell 8,655 shares of Quantum-Si Incorporated (NASDAQ: QSI) Class A Common Stock. The filing also notes previous restricted stock unit vesting of 21,676 units on March 15, 2024, and past sales of 8,627 shares on December 22, 2025. This notice is a standard regulatory requirement for broker-serviced resales, allowing the broker to effect sales under SEC rules, with specific execution details and proceeds expected to be disclosed in future filings.
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.
Vieceli, Quantum-Si CPO, sells $18k in QSI stock
John S. Vieceli, Chief Product Officer of Quantum-Si Inc (NASDAQ:QSI), sold approximately $18,416 worth of Class A Common Stock across two transactions in March 2026. These sales were mandated due to a sell-to-cover provision for tax withholdings related to restricted stock unit vesting. The transactions occurred while Quantum-Si shares traded around $0.85, down 42% over the past year, with analysts noting the stock's volatility and current undervaluation despite recent mixed financial results.
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 (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 (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 (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 (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.
Quantum-Si Reports Fourth Quarter and Full Year 2025 Financial Results
Quantum-Si Incorporated announced its financial results for the fourth quarter and full year 2025. The report was released via Quantisnow, a platform that provides real-time market data and news to investors. This information was also alerted to Quantisnow Plus members shortly after publication.
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.
