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    Greenwich LifeSciences (GLSI)

    Market Price (10/5/2026): $17.09 | Market Cap: $249.9 MilSector: Health Care | Industry: Biotechnology

    Greenwich LifeSciences (GLSI)

    Market Price (10/5/2026): $17.09
    Market Cap: $249.9 Mil
    Sector: Health Care
    Industry: Biotechnology

    Investment Highlights Why It Matters Detailed financial logic regarding cash flow yields vs trend-riding momentum.

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    Megatrend and thematic drivers
    Megatrends include Precision Medicine, and Aging Population & Chronic Disease. Themes include Targeted Therapies, Biopharmaceutical R&D, Show more.

    Weak multi-year price returns
    2Y Excs Rtn is -15%

    Meaningful short interest
    Short Interest % of Basic SharesShort Interest % of Basic Shares = (Short Interest Quantity) / (Basic Shares Outstanding). A high fraction of short interest can indicate potential risk of a short squeeze. is 11%

    Very low revenue
    Rev LTMTotal Revenue or Sales, Last Twelve Months is 0

    Not profitable at operating income level
    Op Inc LTMOperating Income, Last Twelve Months is -22 Mil

    Yield minus risk free rate is negative
    ERPEquity Risk Premium (ERP) = Total Yield - Risk Free Rate, Reflects the premium above risk free assets offered by the investment. is -13%

    High stock price volatility
    Vol 12M is 103%

    Significant short interest
    Short Interest Days-to-CoverDTC = (Short Interest Share Quantity) / (Average Daily Trading Volume). Reflects how many days it would take to cover (close out) the short interest based on average volumes. High DTC can signify an increased risk of a short squeeze. is 19.78

    Key risks
    GLSI key risks include [1] its total dependence on the successful clinical trial outcome and regulatory approval of its single product candidate, Show more.

    0 Megatrend and thematic drivers
    Megatrends include Precision Medicine, and Aging Population & Chronic Disease. Themes include Targeted Therapies, Biopharmaceutical R&D, Show more.
    1 Weak multi-year price returns
    2Y Excs Rtn is -15%
    2 Meaningful short interest
    Short Interest % of Basic SharesShort Interest % of Basic Shares = (Short Interest Quantity) / (Basic Shares Outstanding). A high fraction of short interest can indicate potential risk of a short squeeze. is 11%
    3 Very low revenue
    Rev LTMTotal Revenue or Sales, Last Twelve Months is 0
    4 Not profitable at operating income level
    Op Inc LTMOperating Income, Last Twelve Months is -22 Mil
    5 Yield minus risk free rate is negative
    ERPEquity Risk Premium (ERP) = Total Yield - Risk Free Rate, Reflects the premium above risk free assets offered by the investment. is -13%
    6 High stock price volatility
    Vol 12M is 103%
    7 Significant short interest
    Short Interest Days-to-CoverDTC = (Short Interest Share Quantity) / (Average Daily Trading Volume). Reflects how many days it would take to cover (close out) the short interest based on average volumes. High DTC can signify an increased risk of a short squeeze. is 19.78
    8 Key risks
    GLSI key risks include [1] its total dependence on the successful clinical trial outcome and regulatory approval of its single product candidate, Show more.

    GLSI in ETFs

    Weight = GLSI's share of each fund

    VTI0.00%
    IWM0.00%
    IWO0.01%
    VTWO0.00%

    Valuation & Metrics

    FYE: 12/31GLSI [1]S&P 500 [2]
    REVENUE GROWTH
    LTM Revenue [3]$0.0 Mil—
    FY 2026 Sales$0.0 Mil—
    FY 2027 Sales$8.8 Mil—
    FY 2026 Sales Growth——
    FY 2027 Sales Growth—12.8%
    EARNINGS
    LTM Net Income (GAAP) [3]$-21.7 Mil—
    FY 2026 Net Income (Non-GAAP)$-18.7 Mil—
    FY 2027 Net Income (Non-GAAP)$-15.8 Mil—
    FY 2027 Net Income Growth—18.2%
    FY 2026 EPS (Non-GAAP)$-1.39—
    FY 2027 EPS (Non-GAAP)$-1.17—
    FY 2027 EPS Growth——
    VALUATION
    FY 2026 P/S—1.7
    FY 2027 P/S28.6—
    FY 2026 P/E—7.8
    FY 2027 P/E——

    [1] GLSI forward figures are analyst consensus for the next two fiscal years (fiscal year end 12/31). Net Income and EPS are non-GAAP (adjusted) consensus. P/S and P/E divide the current market cap by the consensus figure.
    [2] S&P 500 figures are the SPY ETF's holdings-weighted forward aggregate. P/S and P/E reflect FY1/FY2 consensus blended to the 12-month window ending 10/31/27 (~one year forward), shown when ≥90% of index weight has estimates. Growth is the aggregate next-fiscal-year vs current-fiscal-year (FY1→FY2) change. Index-level dollar Sales, Net Income and EPS are not applicable.
    [3] LTM = reported trailing-twelve-month actuals (GAAP).
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    AI Analysis | Feedback

    MetricValueDateSource
    Number of Countries in Flamingo-01 Clinical Trial1110092025Link
    Number of Active Clinical Sites in Flamingo-01 Trial1174032025Link
    Planned Patient Enrollment in Flamingo-01 Trial (Double-Blinded Arms)approximately 5001222025Link
    Planned Patient Enrollment in Flamingo-01 Trial (Open-Label Arm)up to 2501222025Link
    FDA Regulatory DesignationFast Track9102025Link
    Potential Patent Life ExtensionBeyond 20403032022Link
    Commercially Manufactured Doses of GP2approximately 200,0001222025Link
    Total Patients Treated with GLSI-100 Across All Clinical Trials1464192022Link

    Price Chart

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    Upcoming
    11/13/2026Earnings ReleaseRev: -
    EPS: -

    Why The Stock Moved

    Qualitative Assessment

    AI Analysis | Feedback

    Updated on 10/1/2026

    Greenwich LifeSciences (GLSI) stock has lost about 30% since 6/30/2026 because of the following key factors:

    1. Clinical Trial Design Modification and Initial Investor Uncertainty.

    In July 2026, Greenwich LifeSciences announced that its Phase III FLAMINGO-01 clinical trial design was modified by the FDA and EMA to include all HLA types, a change projected to increase patient enrollment by 122%. Despite the long-term potential for expanding the addressable market for its GP2 immunotherapy, the stock experienced an immediate 14% decline on July 20, 2026, following this announcement, reflecting initial investor uncertainty or profit-taking.

    2. Persistent Regulatory and Financial Reporting Delays.

    Greenwich LifeSciences faced ongoing administrative challenges related to its financial reporting during this period. While a Nasdaq non-compliance notice for failing to timely file its fiscal Q1 2026 Form 10-Q was received in May 2026, the company also experienced delays in filing its annual Form 10-K for the fiscal year ended December 31, 2025, due to coordination issues between auditors. These regulatory and reporting delays contributed to a decrease in investor confidence throughout the period from June 30, 2026.

    Show more
    Updated on 10/1/2026

    Greenwich LifeSciences (GLSI) stock has lost about 30% since 6/30/2026 because of the following key factors:

    1. Clinical Trial Design Modification and Initial Investor Uncertainty.

    In July 2026, Greenwich LifeSciences announced that its Phase III FLAMINGO-01 clinical trial design was modified by the FDA and EMA to include all HLA types, a change projected to increase patient enrollment by 122%. Despite the long-term potential for expanding the addressable market for its GP2 immunotherapy, the stock experienced an immediate 14% decline on July 20, 2026, following this announcement, reflecting initial investor uncertainty or profit-taking.

    2. Persistent Regulatory and Financial Reporting Delays.

    Greenwich LifeSciences faced ongoing administrative challenges related to its financial reporting during this period. While a Nasdaq non-compliance notice for failing to timely file its fiscal Q1 2026 Form 10-Q was received in May 2026, the company also experienced delays in filing its annual Form 10-K for the fiscal year ended December 31, 2025, due to coordination issues between auditors. These regulatory and reporting delays contributed to a decrease in investor confidence throughout the period from June 30, 2026.

    3. Deteriorating Financial Performance and "Going Concern" Warning.

    The company's financial health deteriorated, as evidenced by a net loss of $9.6 million for the six months ended June 30, 2026 (fiscal H1 2026), an increase from $6.5 million in the prior-year period, primarily due to higher research and development and stock-based compensation expenses. This financial update, reported around October 3, 2026, included a warning that recurring losses and negative operating cash flows raise substantial doubt about the company's ability to continue as a going concern within one year without securing additional capital. This significantly impacted investor confidence regarding the company's financial stability.

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    Stock Movement Drivers

    Fundamental Drivers

    The -27.6% change in GLSI stock from 6/30/2026 to 10/4/2026 was primarily driven by a -0.4% change in the company's Shares Outstanding (Mil).
    (LTM values as of)630202610042026Change
    Stock Price ($)23.4616.98-27.6%
    Change Contribution By: 
    Total Revenues ($ Mil)000.0%
    P/S Multiple∞∞0.0%
    Shares Outstanding (Mil)1515-0.4%
    Cumulative Contribution0.0%

    LTM = Last Twelve Months as of date shown

    Market Drivers

    6/30/2026 to 10/4/2026
    ReturnCorrelation
    GLSI-27.6% 
    Market (SPY)3.1%41.4%
    Sector (XLV)4.7%17.0%

    Fundamental Drivers

    The -29.3% change in GLSI stock from 3/31/2026 to 10/4/2026 was primarily driven by a -6.7% change in the company's Shares Outstanding (Mil).
    (LTM values as of)331202610042026Change
    Stock Price ($)24.0216.98-29.3%
    Change Contribution By: 
    Total Revenues ($ Mil)000.0%
    P/S Multiple∞∞0.0%
    Shares Outstanding (Mil)1415-6.7%
    Cumulative Contribution0.0%

    LTM = Last Twelve Months as of date shown

    Market Drivers

    3/31/2026 to 10/4/2026
    ReturnCorrelation
    GLSI-29.3% 
    Market (SPY)18.6%36.1%
    Sector (XLV)13.8%17.4%

    Fundamental Drivers

    The 70.7% change in GLSI stock from 9/30/2025 to 10/4/2026 was primarily driven by a 0.0% change in the company's Total Revenues ($ Mil).
    (LTM values as of)930202510042026Change
    Stock Price ($)9.9516.9870.7%
    Change Contribution By: 
    Total Revenues ($ Mil)000.0%
    P/S Multiple∞∞0.0%
    Shares Outstanding (Mil)1315-8.6%
    Cumulative Contribution0.0%

    LTM = Last Twelve Months as of date shown

    Market Drivers

    9/30/2025 to 10/4/2026
    ReturnCorrelation
    GLSI70.7% 
    Market (SPY)16.5%38.2%
    Sector (XLV)20.9%20.4%

    Fundamental Drivers

    The 92.1% change in GLSI stock from 9/30/2023 to 10/4/2026 was primarily driven by a 0.0% change in the company's Total Revenues ($ Mil).
    (LTM values as of)930202310042026Change
    Stock Price ($)8.8416.9892.1%
    Change Contribution By: 
    Total Revenues ($ Mil)000.0%
    P/S Multiple∞∞0.0%
    Shares Outstanding (Mil)1315-12.1%
    Cumulative Contribution0.0%

    LTM = Last Twelve Months as of date shown

    Market Drivers

    9/30/2023 to 10/4/2026
    ReturnCorrelation
    GLSI92.1% 
    Market (SPY)86.2%31.4%
    Sector (XLV)35.2%21.9%

    Return vs. Risk

    Price Returns Compared

     202120222023202420252026Total [1]
    Returns
    GLSI Return-33%-38%-31%7%87%-13%-50%
    Peers Return-15%-20%-11%0%-35%-48%-79%
    S&P 500 Return27%-19%24%23%16%12%104%

    Monthly Win Rates [3]
    GLSI Win Rate42%50%25%50%42%44% 
    Peers Win Rate46%31%44%47%47%22% 
    S&P 500 Win Rate75%42%67%75%67%44% 

    Max Drawdowns [4]
    GLSI Max Drawdown-59%-71%-63%-46%-43%-62% 
    Peers Max Drawdown-35%-40%-49%-45%-59%-50% 
    S&P 500 Max Drawdown-5%-25%-10%-8%-19%-9% 

    [1] Cumulative total returns since the beginning of 2021
    [2] Peers: VRTX, CMND, CNSY, CNXU, CSBR.
    [3] Win Rate = % of calendar months in which monthly returns were positive
    [4] Max drawdown represents maximum peak-to-trough decline within a year
    [5] 2026 data is for the year up to 10/2/2026 (YTD)

    How Low Can It Go

    EventGLSIS&P 500
    2025 US Tariff Shock
      % Loss-29.9%-18.8%
      % Gain to Breakeven42.6%23.1%
      Time to Breakeven259 days79 days
    2024 Yen Carry Trade Unwind
      % Loss-17.6%-7.8%
      % Gain to Breakeven21.4%8.5%
      Time to Breakeven497 days18 days
    Summer-Fall 2023 Five Percent Yield Shock
      % Loss-13.7%-9.5%
      % Gain to Breakeven15.8%10.5%
      Time to Breakeven11 days24 days
    2023 SVB Regional Banking Crisis
      % Loss-49.1%-6.7%
      % Gain to Breakeven96.6%7.1%
      Time to Breakeven249 days31 days
    2022 Inflation Shock & Fed Tightening
      % Loss-69.7%-24.5%
      % Gain to Breakeven230.5%32.4%
      Time to Breakeven1292 days427 days

    Compare to VRTX, APMD, ATTO, BLSM, BRVE

    In The Past

    Greenwich LifeSciences's stock fell -29.9% during the 2025 US Tariff Shock. Such a loss loss requires a 42.6% gain to breakeven.

    Preserve Wealth

    Limiting losses and compounding gains is essential to preserving wealth.

    Asset Allocation

    Actively managed asset allocation strategies protect wealth. Learn more.

    EventGLSIS&P 500
    2025 US Tariff Shock
      % Loss-29.9%-18.8%
      % Gain to Breakeven42.6%23.1%
      Time to Breakeven259 days79 days
    2023 SVB Regional Banking Crisis
      % Loss-49.1%-6.7%
      % Gain to Breakeven96.6%7.1%
      Time to Breakeven249 days31 days
    2022 Inflation Shock & Fed Tightening
      % Loss-69.7%-24.5%
      % Gain to Breakeven230.5%32.4%
      Time to Breakeven1292 days427 days

    Compare to VRTX, APMD, ATTO, BLSM, BRVE

    In The Past

    Greenwich LifeSciences's stock fell -29.9% during the 2025 US Tariff Shock. Such a loss loss requires a 42.6% gain to breakeven.

    Preserve Wealth

    Limiting losses and compounding gains is essential to preserving wealth.

    Asset Allocation

    Actively managed asset allocation strategies protect wealth. Learn more.

    About Greenwich LifeSciences (GLSI)

    Greenwich LifeSciences (GLSI) is a clinical-stage biopharmaceutical company focused on developing innovative cancer immunotherapies. The company's core mission is to address breast cancer and other cancers that express the HER2/neu protein, aiming to provide novel treatment options in the oncology field.

    The company's lead product candidate is GP2, an immunotherapy designed to prevent the recurrence of breast cancer. GP2 has successfully completed a Phase IIb clinical trial, marking a significant milestone in its development. This immunotherapy is specifically intended for patients who have previously undergone surgery for breast cancer, with the goal of reducing the risk of the disease returning.

    Therefore, Greenwich LifeSciences primarily serves the market of breast cancer patients who have completed initial surgical treatment and are seeking advanced therapies to prevent recurrence. Its target customers are within the oncology sector, specifically the post-surgical patient population requiring preventative immunological treatments for HER2/neu-expressing cancers.

    AI Analysis | Feedback

    Here are 1-3 brief analogies to describe Greenwich LifeSciences (GLSI):

    • It's like a small, highly focused Genentech working on new immunotherapies for breast cancer.
    • Imagine a startup division of a major pharmaceutical like Merck or Roche, solely dedicated to developing immunotherapies for breast cancer.

    AI Analysis | Feedback

    • GP2: An immunotherapy drug candidate in Phase IIb clinical trials for preventing breast cancer recurrence.

    AI Analysis | Feedback

    Greenwich LifeSciences, Inc. (GLSI) is a clinical-stage biopharmaceutical company focused on the development of novel cancer immunotherapies. Its lead product candidate, GP2, has completed Phase IIb clinical trials. At this stage of development, the company is primarily engaged in research, development, and clinical trials, rather than commercial sales of a product.

    Therefore, Greenwich LifeSciences (GLSI) does not currently have major customers in the traditional sense, as it is not yet selling a commercialized product to individuals or other companies. Its primary activities are focused on advancing its drug candidates through clinical trials and seeking regulatory approval, not on generating revenue from product sales.

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    Creative Peptides

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    Snehal S. Patel, Chief Executive Officer, Chief Financial Officer, and Director
    Mr. Patel possesses over 30 years of experience in executive management, corporate development, operations, and investment banking within the healthcare industry. He has provided consulting, management, and advisory services for R&D and manufacturing design, scale-up, and operations at numerous public and private biotech companies, focusing on clinical and pre-clinical assets in areas such as stem cell therapy, multiple sclerosis t-cell therapy, oncolytic viruses, and disposable biotech manufacturing equipment. Prior to his current role, he served as an investment banker at Sanders Morris Harris, Ferghana Partners, and JP Morgan Chase, where his work centered on healthcare and biotech financing and strategic transactions. He also worked in operations and business development at consulting firms and at Bayer Corporation, specifically in the biotechnology division on the commercialization of recombinant Factor VIII and in Corporate Development involving licensing and M&A transactions. Mr. Patel frequently acquires company stock, indicating his confidence in Greenwich LifeSciences' future prospects.

    F. Joseph Daugherty, M.D., Chief Medical Officer and Director
    Dr. Daugherty brings over 35 years of experience in managing and overseeing biotechnology and biomedical projects. He is currently the Managing Partner of Phenolics, LLC and PharmaPrint, LLC, which are nutraceutical companies, and serves on the boards of several startup companies and a charitable foundation. Dr. Daugherty previously held positions as President, Chief Executive Officer, Chief Medical Officer, and Chairman of the board of directors at Eleos, Inc., a private, clinical-stage biotech company focused on anti-sense technology in cancer.

    Jaye Thompson, M.S., Ph.D., Vice President, Clinical and Regulatory Affairs
    Dr. Thompson holds the crucial role of Vice President, Clinical and Regulatory Affairs for Greenwich LifeSciences.

    David B. McWilliams, Chairman of the Board
    Mr. McWilliams has more than 40 years of experience in establishing biopharmaceutical and healthcare companies. He currently serves as the Chairman of the board of directors of BioHouston, Inc., an organization dedicated to advocating for Houston's life sciences industry. Mr. McWilliams has acted as a consultant and advisor at various levels for multiple private start-up biotech companies, assisting in the development of pre-clinical and clinical assets for cancer and other therapeutic areas. He was formerly the Chief Executive Officer of Greenwich LifeSciences. His career also includes roles as President of Harleco Diagnostics Division (EM Industries), General Manager and Program Manager of Abbott Laboratories, and Management Consultant at McKinsey & Company. He also served as Chief Executive Officer and President of Kallestad Diagnostics (Erbamont).

    AI Analysis | Feedback

    The key risks to Greenwich LifeSciences (GLSI) are primarily associated with its stage of development as a clinical-stage biopharmaceutical company focused on a single lead product. *

    Clinical Trial and Regulatory Risk

    Greenwich LifeSciences' success is heavily dependent on the successful completion of clinical trials and subsequent regulatory approval for its lead product candidate, GP2 (also referred to as GLSI-100), an immunotherapy for breast cancer. GP2 is currently in a Phase III clinical trial (FLAMINGO-01). Despite positive preliminary safety data from earlier phases and the ongoing Phase III trial, and the FDA's Fast Track designation, there is no guarantee of successful trial outcomes or market approval. Biopharmaceutical product development inherently carries a significant risk of failure at various stages of clinical trials, and regulatory requirements can be stringent and subject to change, potentially leading to delays or outright rejection. Manufacturing and pharmacy process concerns have also posed regulatory challenges in the past, though these have been addressed. *

    Financial Risk and Capital Constraints

    As a clinical-stage company, Greenwich LifeSciences has a history of substantial losses and does not generate revenue from product sales, anticipating continued losses as it advances GP2 through development and towards commercialization. The company requires significant additional financing to fund its operations and complete the development and potential commercialization of its product candidate. Its existing cash reserves are expected to fund operations for a limited period, necessitating ongoing efforts to raise capital. The reliance on "at-the-market" share sales for funding can lead to shareholder dilution, and a failure to secure adequate additional funds could force the company to delay or reduce its development programs. *

    Concentration Risk

    The company's business is highly concentrated on a single immunotherapy, GP2 (GLSI-100), as its primary product candidate. While Greenwich LifeSciences is exploring follow-on indications to expand the patient population and target other HER2/neu-expressing cancers, the entire pipeline strategy revolves around this single asset. This singular focus means that any setback, delay, or failure related to GP2 would have a severe and potentially catastrophic impact on the company's financial performance and future viability.

    AI Analysis | Feedback

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    AI Analysis | Feedback

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    Greenwich LifeSciences' lead product candidate, GP2, an immunotherapy focused on preventing breast cancer recurrences in patients who have previously undergone surgery, targets HER2/neu-expressing cancers. The addressable markets for products and services related to breast cancer, particularly HER2-positive and HER2-low cancers, and cancer immunotherapies, are substantial.

    • The global breast cancer therapeutics market was estimated at USD 31.5 billion in 2024 and is projected to reach USD 71.3 billion by 2034, growing at a Compound Annual Growth Rate (CAGR) of 8.5%. Another estimate places the global breast cancer market size at USD 26.23 billion in 2025, expected to grow to USD 38.54 billion by 2034 with a CAGR of 4.37%.
    • The global HER2-positive breast cancer treatment market is estimated at USD 11.38 billion in 2026 and is projected to reach USD 13.79 billion by 2031, with a CAGR of 3.92%. North America accounted for 41.52% of this market's revenue in 2025.
    • The global HER2 inhibitors market was valued at approximately USD 8.36 billion in 2025 and is expected to increase to approximately USD 13.69 billion by 2032, growing at a CAGR of 7.3%.
    • The global cancer immunotherapy market was valued at USD 136.39 billion in 2025 and is projected to reach approximately USD 367.63 billion by 2035, growing at a CAGR of 10.42%. Within this, the breast cancer segment is anticipated to show significant growth.
    • For HER2-low cancers, which GP2 also addresses (HER2 1-2+ patients), the market size across the 7 major markets (7MM) was approximately USD 3.2 billion in 2024. This market is projected to grow to USD 8.997 billion by 2034 in leading countries (US, EU4, UK, and Japan), at a CAGR of 11%. The United States market for HER2-low cancers was approximately USD 1.6 billion in 2024.
    ```

    AI Analysis | Feedback

    The future revenue growth for Greenwich LifeSciences (GLSI) over the next 2-3 years is primarily driven by the advancement and potential commercialization of its lead product candidate, GP2 (GLSI-100), an immunotherapy aimed at preventing breast cancer recurrences.

    1. Successful Completion and Positive Data from the Phase III FLAMINGO-01 Clinical Trial: The ongoing global Phase III FLAMINGO-01 clinical trial evaluating GLSI-100 is a critical driver. The company expects to report topline efficacy and safety data once a prespecified number of recurrence events occurs, with a projected timeframe of 12 to 18 months, depending on event rates. Preliminary data from the non-HLA-A*02 arm of the trial have shown an approximately 80% reduction in recurrence rate after the primary immunization series. Positive outcomes from this trial are essential for subsequent regulatory submissions and potential market entry.
    2. Regulatory Approvals for GP2 (GLSI-100): The company is actively progressing toward filing a Biological License Application (BLA) with the FDA in the US and pursuing regulatory filings with European Medicines Agency (EMA) in Europe. The FDA's approval of the first commercially manufactured lot of GP2 vials for use in the Phase III trial has significantly de-risked the future BLA filing process from a manufacturing perspective. If approved, GLSI-100 could be granted up to 12 years of market exclusivity under current law.
    3. Commercial Manufacturing and Supply Chain Readiness: Greenwich LifeSciences has made substantial progress in establishing its commercial manufacturing capabilities. The company manufactured the first three commercial lots of GP2 active ingredient in 2023, capable of producing approximately 200,000 doses, and the first commercial lot of finished GP2 vials in 2024. This readiness in manufacturing and supply chain is crucial for a timely and efficient market launch following regulatory approval.
    4. Market Penetration Addressing Unmet Medical Need: Upon potential approval, GP2 is positioned to address a significant unmet need in preventing breast cancer recurrences, particularly in patients who do not adequately respond to existing treatments like Herceptin or Kadcyla. There are approximately 700,000 new breast cancer patients and 9.5 million breast cancer survivors in the US and EU in 2025. Successful market penetration within this patient population would be a key driver of revenue growth.

    AI Analysis | Feedback

    Share Repurchases

    • Greenwich LifeSciences suspended its share repurchase program in July 2022.
    • Prior to suspension, the company repurchased approximately 520,000 shares of common stock for an aggregate of about $7.5 million.

    Share Issuance

    • Between January 1, 2024, and September 30, 2024, Greenwich LifeSciences raised approximately $1.75 million through an At-The-Market (ATM) agreement and nearly $2.5 million through a private placement offering.
    • In the first three weeks of January 2026, the company raised approximately $7 million via its ATM financing vehicle.
    • Cash burn in 2024 was offset in part through the sale of common stock via an ATM program and a private placement. The company also sold $1.2 million worth of shares in the ATM arrangement between January 1 and April 11, 2025.

    Capital Expenditures

    • Greenwich LifeSciences reported minimal to no significant capital expenditures on physical assets, with recent financial snapshots listing Capital Expenditures as $0.0.
    • The primary focus of capital utilization is on research and development, particularly funding for its Phase III FLAMINGO-01 clinical trial.
    • Research and development expenses increased to $2,292,040 for the three months ended September 30, 2024, up from $2,158,167 in the same quarter the previous year, mainly due to increased clinical expenses.

    Peer Outperformance in Biotechnology

    GLSI has outperformed 61% of its 361 Biotechnology peers over 5Y. Biotechnology ranks 10th of 10 industries in Health Care by median 5Y return. The sector’s gains have largely come from elsewhere.
    Share of Biotechnology constituents that GLSI has outperformed, by holding period. Peers without a full price history over a given window are excluded from that window.
    1Y
    80%
    of 453 industry peers · 55.6% return
    3Y
    77%
    of 401 industry peers · 99.5% return
    5Y
    61%
    of 361 industry peers · -55.0% return
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    Median price return by industry across the Health Care sector, ranked by 5Y. Biotechnology is GLSI's own industry. Use this to see which corners of the sector have carried the returns.
    Industry Names 1Y med3Y med5Y med Top 3 by 5Y
    Health Care Distributors 6 12.8%43.2%91.3% CAH 414% · MCK 366% · COR 175%
    Health Care Services 20 18.8%36.3%9.1% HIMS 295% · RDNT 144% · DGX 81%
    Managed Health Care 8 25.4%-8.6%4.2% OSCR 92% · HQY 38% · ELV 11%
    Health Care Facilities 24 -2.1%5.0%-3.6% THC 291% · NHC 272% · ENSG 131%
    Health Care Equipment 50 -8.9%-0.2%-16.2% POCI 11050% · UFPT 374% · GKOS 253%
    Pharmaceuticals 62 -7.4%-2.8%-30.9% INDV 1117% · ETON 1046% · LQDA 953%
    Health Care Supplies 12 21.5%-4.9%-37.5% LNTH 296% · HAE 52% · MMSI 19%
    Life Sciences Tools & Services 109 -5.7%-11.3%-66.7% SNWV 1867% · NTRA 269% · MEDP 210%
    Health Care Technology 21 -35.8%-55.3%-79.1% SPOK 79% · HSTM 10% · VEEV -2%
    Biotechnology ← 362 -18.3%-24.6%-79.3% CELZ 1252% · ELVN 1139% · DNTH 1108%
    Median of constituents with a full price history over each window. Top names are unfiltered by size in this render.

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    LINDLindblad Expeditions2.322.2%141.2%
    IBRXImmunityBio10.821.9%419.4%
    ACLSAxcelis Technologies4.620.0%83.9%
    RXORXO4.018.1%85.0%
    SYNASynaptics4.717.9%63.6%
    MTRNMaterion6.517.8%151.6%

    Top Losers

    TickerCompanyMkt Cap (B)1W RtnYTD Rtn
    LQDALiquidia2.5-58.1%-17.0%
    QUREuniQure1.6-38.6%-2.0%
    EMATEvolution Metals & Technologies1.3-36.3%-90.4%
    OCULOcular Therapeutix1.6-27.9%-42.7%
    CYPHCypherpunk Technologies0.6-26.5%161.2%
    NKTRNektar Therapeutics1.4-23.6%3.1%
    FICOFair Isaac15.0-23.4%-60.9%
    IARTIntegra Lifesciences1.0-21.3%2.1%
    BXBLBOXABL9.7-19.9%-67.1%
    EVEXEve0.6-19.8%-56.4%

    Top Gainers

    TickerCompanyMkt Cap (B)1M RtnYTD Rtn
    KODKodiak Sciences5.9151.9%237.8%
    SECZSecuritize1.999.5%5.6%
    PACBPacific Biosciences of California0.892.4%35.8%
    CYPHCypherpunk Technologies0.680.4%161.2%
    GRALGRAIL6.277.8%67.4%
    MXLMaxLinear9.576.3%507.7%
    DNAGinkgo Bioworks0.875.7%48.6%
    VICRVicor14.270.1%181.8%
    IOVAIovance Biotherapeutics6.464.9%420.7%
    COHUCohu3.560.6%215.8%

    Top Losers

    TickerCompanyMkt Cap (B)1M RtnYTD Rtn
    CTVACorteva8.0-86.8%-82.1%
    LQDALiquidia2.5-58.9%-17.0%
    XNDUXanadu Quantum Technologies1.3-56.7%-62.6%
    QUREuniQure1.6-49.3%-2.0%
    METCRamaco Resources0.5-43.8%-55.0%
    RAREUltragenyx Pharmaceutical1.6-42.6%-33.8%
    ALHCAlignment Healthcare1.6-41.6%-59.8%
    EMATEvolution Metals & Technologies1.3-40.4%-90.4%
    NKTRNektar Therapeutics1.4-40.1%3.1%
    FICOFair Isaac15.0-39.9%-60.9%

    More From Trefis

    Research & Analysis

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    Wealth Management

    Peer Comparisons

    Peers to compare with:

    Financials

    GLSIVRTXCMNDCNSYCNXUCSBRMedian
    NameGreenwic.Vertex P.Clearmin.Cerenome Conexeu .Champion. 
    Mkt Price17.09504.730.711.553.094.964.03
    Mkt Cap0.2128.1----64.1
    Rev LTM012,587-0--0
    Op Inc LTM-224,777--26---22
    FCF LTM-123,796--24---12
    FCF 3Y Avg-91,957--17---9
    CFO LTM-124,293--22---12
    CFO 3Y Avg-92,398--16---9

    Growth & Margins

    GLSIVRTXCMNDCNSYCNXUCSBRMedian
    NameGreenwic.Vertex P.Clearmin.Cerenome Conexeu .Champion. 
    Rev Chg LTM-10.2%----10.2%
    Rev Chg 3Y Avg-9.8%----9.8%
    Rev Chg Q-12.5%----12.5%
    QoQ Delta Rev Chg LTM-3.0%----3.0%
    Op Inc Chg LTM-15.2%2,497.9%--106.7%---15.2%
    Op Inc Chg 3Y Avg-36.3%792.2%--26.9%---26.9%
    Op Mgn LTM-37.9%----37.9%
    Op Mgn 3Y Avg-23.9%----23.9%
    QoQ Delta Op Mgn LTM--0.2%-----0.2%
    CFO/Rev LTM-34.1%----34.1%
    CFO/Rev 3Y Avg-19.6%----19.6%
    FCF/Rev LTM-30.2%----30.2%
    FCF/Rev 3Y Avg-15.7%----15.7%

    Valuation

    GLSIVRTXCMNDCNSYCNXUCSBRMedian
    NameGreenwic.Vertex P.Clearmin.Cerenome Conexeu .Champion. 
    Mkt Cap0.2128.1----64.1
    P/S-10.2----10.2
    P/Op Inc-11.426.8----7.7
    P/EBIT-11.425.4----7.0
    P/E-11.529.1----8.8
    P/CFO-20.029.8----4.9
    Total Yield-8.7%3.4%-----2.6%
    Dividend Yield0.0%0.0%----0.0%
    FCF Yield 3Y Avg-4.6%1.6%-----1.5%
    D/E0.00.0----0.0
    Net D/E-0.0-0.0-----0.0

    Returns

    GLSIVRTXCMNDCNSYCNXUCSBRMedian
    NameGreenwic.Vertex P.Clearmin.Cerenome Conexeu .Champion. 
    1M Rtn7.1%-7.6%-38.8%-43.7%-37.8%-5.0%-22.7%
    3M Rtn-22.3%-4.4%-69.9%-60.9%-71.5%-13.9%-41.6%
    6M Rtn-25.1%15.0%-93.4%-60.9%-78.5%-14.0%-43.0%
    12M Rtn56.6%25.2%-99.8%-60.9%-78.5%-21.3%-41.1%
    3Y Rtn100.8%42.1%-100.0%-60.9%-78.5%-20.0%-40.4%
    1M Excs Rtn7.8%-10.1%-62.3%-48.0%-45.2%-4.4%-27.6%
    3M Excs Rtn-18.9%-7.2%-72.1%-63.2%-73.8%-17.7%-41.1%
    6M Excs Rtn-42.5%-2.3%-110.6%-77.6%-95.8%-31.4%-60.1%
    12M Excs Rtn53.9%9.8%-114.8%-75.5%-93.6%-37.6%-56.5%
    3Y Excs Rtn18.5%-36.3%-180.1%-139.0%-159.0%-95.2%-117.1%

    Comparison Analyses

    null

    Financials

    $ Mil | FY: 12/312026Q22026Q12025Q42025Q32025Q22025Q12024Q42024Q32024Q22024Q12023Q42023Q3
    Period End6/30/20263/31/202612/31/20259/30/20256/30/20253/31/202512/31/20249/30/20246/30/20243/31/202412/31/20239/30/2023
    Filing Date8/11/20266/4/20266/1/202611/14/20258/14/20255/20/20254/15/202511/14/20248/14/20245/20/20244/15/202410/19/2023
    Key Financials Quarterly            
    Total Revenue000000000000
    Ebitda-4-6-8-4-4-3-10-3-3-3-3-3
    Operating Income-4-6-8-4-4-3-10-3-3-3-3-3
    Net Income-4-6-8-4-4-3-10-3-3-2-3-2
    EPS-0.27-0.39-0.58-0.30-0.28-0.21-0.74-0.20-0.20-0.19-0.21-0.19
    Key Financials TTM            
    Total Revenue TTM000000000000
    Ebitda TTM-22-22-19-20-19-18-18-11-11-10-9-9
    Operating Income TTM-22-22-19-20-19-18-18-11-11-10-9-9
    Net Income TTM-22-21-19-20-19-18-17-10-10-9-9-9
    Growth Rates Quarterly            
    Total Revenue Growth------------
    EBITDA Growth-6.7%-106.9%18.2%-53.0%-41.6%-9.1%-242.4%-9.0%-52.3%-13.2%2.0%-5.0%
    Operating Income Growth-6.7%-106.8%18.2%-53.0%-41.6%-9.1%-242.4%-9.0%-52.3%-13.2%2.0%-5.0%
    Net Income Growth-5.3%-106.1%18.0%-55.6%-43.8%-11.0%-251.9%-11.6%-60.1%-16.4%1.6%-3.1%
    Margins Quarterly            
    EBITDA Margin------------
    Operating Income Margin------------
    Net Income Margin------------
    Cash & Debt            
    Total Cash9116433467679
    Total Debt000000000000
    Net Debt / (Cash)-9-11-6-4-3-3-4-6-7-6-7-9
    Cash Flows Quarterly            
    FCF from Operations-2-5-3-3-2-2-2-3-1-2-2-2
    Cash Flows TTM            
    FCF from Operations TTM-12-13-10-9-9-7-7-8-7-7-6-6
    Returns to Shareholders Quarterly            
    Dividends000000000000
    Share Repurchases-0-0-0-0-0-0-0-0-0-0-0-0
    Return on Invested Capital (ROIC) Quarterly            
    ROIC-17.7%-26.2%-39.1%-22.0%-21.0%-16.3%-60.1%-19.1%-19.7%-19.3%-22.7%-21.2%
    Return on Invested Capital (ROIC) TTM            
    ROIC TTM-24.0%-24.7%-22.9%-26.9%-26.4%-26.3%-27.3%-18.8%-19.5%-18.3%-18.6%-19.8%

    Segment Financials

    Revenue by Segment
    $ Mil2025202420232022
    Clinical development programs0000
    Total0000


    Assets by Segment
    $ Mil20252024202320222021
    Clinical development programs6471327
    Total6471327


    Price Behavior

    Price Behavior
    Market Price$16.98 
    Market Cap ($ Bil)0.2 
    First Trading Date09/25/2020 
    Distance from 52W High-49.4% 
       50 Days200 Days
    DMA Price$16.20$21.87
    DMA Trendupdown
    Distance from DMA4.8%-22.4%
     3M1YR
    Volatility93.8%103.7%
    Downside Capture510.76318.08
    Upside Capture295.48318.74
    Correlation (SPY)42.2%38.5%
    GLSI Betas & Captures as of 9/30/2026

     1M2M3M6M1Y3Y
    Beta3.153.123.672.713.051.65
    Up Beta-0.670.291.633.412.791.36
    Down Beta6.888.664.541.432.861.28
    Up Capture419%498%433%256%1171%1440%
    Bmk +ve Days6162766132424
    Stock +ve Days13273768131364
    Down Capture113%192%392%267%176%112%
    Bmk -ve Days16263760120328
    Stock -ve Days9152757120381

    [1] Upside and downside betas calculated using positive and negative benchmark daily returns respectively
    Based On 1-Year Data
    Annualized
    Return    		Annualized
    Volatility    		Sharpe
    Ratio    		Correlation
    with GLSI
    GLSI68.3%103.2%0.97-
    Sector ETF (XLV)17.4%15.7%0.8220.5%
    Equity (SPY)16.2%13.0%0.8838.2%
    Gold (GLD)6.8%29.6%0.228.7%
    Commodities (DBC)44.9%20.8%1.67-16.7%
    Real Estate (VNQ)1.5%13.6%-0.1513.2%
    Bitcoin (BTCUSD)-28.9%44.3%-0.6424.7%

    Smart multi-asset allocation framework can stack odds in your favor. Learn How
    Based On 5-Year Data
    Annualized
    Return    		Annualized
    Volatility    		Sharpe
    Ratio    		Correlation
    with GLSI
    GLSI-16.7%81.2%0.12-
    Sector ETF (XLV)6.4%15.2%0.2320.6%
    Equity (SPY)13.1%17.2%0.5828.8%
    Gold (GLD)18.4%18.9%0.795.8%
    Commodities (DBC)10.3%19.6%0.41-4.6%
    Real Estate (VNQ)0.7%18.8%-0.0719.2%
    Bitcoin (BTCUSD)14.6%52.2%0.4517.9%

    Smart multi-asset allocation framework can stack odds in your favor. Learn How
    Based On 10-Year Data
    Annualized
    Return    		Annualized
    Volatility    		Sharpe
    Ratio    		Correlation
    with GLSI
    GLSI12.8%417.4%0.43-
    Sector ETF (XLV)10.4%16.7%0.502.7%
    Equity (SPY)15.3%17.9%0.723.0%
    Gold (GLD)11.5%16.4%0.57-3.1%
    Commodities (DBC)8.2%18.1%0.37-0.7%
    Real Estate (VNQ)4.2%20.7%0.162.2%
    Bitcoin (BTCUSD)64.1%66.2%1.043.6%

    Smart multi-asset allocation framework can stack odds in your favor. Learn How

    Short Interest

    Short Interest: As Of Date9152026
    Short Interest: Shares Quantity1.6 Mil
    Short Interest: % Change Since 8312026-1.8%
    Average Daily Volume0.1 Mil
    Days-to-Cover Short Interest19.8 days
    Basic Shares Quantity14.6 Mil
    Short % of Basic Shares11.2%

    Earnings Returns History

    Updated 6/3/2026
    Expand for More
     Forward Returns
    Earnings Date1D Returns5D Returns21D Returns
    SUMMARY STATS   
    # Positive000
    # Negative000
    Median Positive   
    Median Negative   
    Max Positive   
    Max Negative   
     Collapse to Preview
     Forward Returns
    Earnings Date1D Returns5D Returns21D Returns
    SUMMARY STATS   
    # Positive000
    # Negative000
    Median Positive   
    Median Negative   
    Max Positive   
    Max Negative   

    SEC Filings

    Expand for More
    Report DateFiling DateFiling
    06/30/202608/11/202610-Q
    03/31/202606/04/202610-Q
    12/31/202506/01/202610-K
    09/30/202511/14/202510-Q
    06/30/202508/14/202510-Q
    03/31/202505/20/202510-Q
    12/31/202404/15/202510-K
    09/30/202411/14/202410-Q
    06/30/202408/14/202410-Q
    03/31/202405/20/202410-Q
    12/31/202304/15/202410-K
    09/30/202310/19/202310-Q
    06/30/202308/21/202310-Q
    03/31/202305/22/202310-Q
    12/31/202203/31/202310-K
    09/30/202211/14/202210-Q
     Collapse to Preview
    Report DateFiling DateFiling
    06/30/202608/11/202610-Q
    03/31/202606/04/202610-Q
    12/31/202506/01/202610-K
    09/30/202511/14/202510-Q
    06/30/202508/14/202510-Q
    03/31/202505/20/202510-Q
    12/31/202404/15/202510-K
    09/30/202411/14/202410-Q
    06/30/202408/14/202410-Q
    03/31/202405/20/202410-Q
    12/31/202304/15/202410-K
    09/30/202310/19/202310-Q
    06/30/202308/21/202310-Q
    03/31/202305/22/202310-Q
    12/31/202203/31/202310-K
    09/30/202211/14/202210-Q
    06/30/202208/15/202210-Q
    03/31/202205/20/202210-Q
    12/31/202103/21/202210-K
    09/30/202111/15/202110-Q
    06/30/202108/13/202110-Q
    03/31/202105/20/202110-Q
    12/31/202003/31/202110-K
    09/30/202011/16/202010-Q
    06/30/202009/28/2020424B4

    Insider Activity

    Updated 7/29/2026
    Expand for More
    #OwnerTitleHoldingActionFiling DatePriceSharesTransacted
    Value    		Value of
    Held Shares    		Form
    1Patel, SnehalCEO and CFODirectBuy729202613.621,50020,43076,397,331Form
    2Patel, SnehalCEO and CFODirectBuy727202612.881,10014,16872,227,202Form
    3Patel, SnehalCEO and CFODirectBuy727202613.142,50032,85073,670,750Form
    4Patel, SnehalCEO and CFODirectBuy114202627.542,90079,866154,287,397Form
    5Patel, SnehalCEO and CFODirectBuy105202621.364,30091,848119,603,227Form
     Collapse to Preview
    #OwnerTitleHoldingActionFiling DatePriceSharesTransacted
    Value    		Value of
    Held Shares    		Form
    1Patel, SnehalCEO and CFODirectBuy729202613.621,50020,43076,397,331Form
    2Patel, SnehalCEO and CFODirectBuy727202612.881,10014,16872,227,202Form
    3Patel, SnehalCEO and CFODirectBuy727202613.142,50032,85073,670,750Form
    4Patel, SnehalCEO and CFODirectBuy114202627.542,90079,866154,287,397Form
    5Patel, SnehalCEO and CFODirectBuy105202621.364,30091,848119,603,227Form
    6Patel, SnehalCEO and CFODirectBuy102202621.732,90063,017121,581,566Form
    7Patel, SnehalCEO and CFODirectBuy1219202512.624,10051,74270,573,589Form
    8Patel, SnehalCEO and CFODirectBuy112820258.374,60038,50246,772,414Form
    9Patel, SnehalCEO and CFODirectBuy111220258.4310,60089,35847,068,922Form
    10Patel, SnehalCEO and CFODirectBuy110420259.262,30021,29851,605,073Form

    Industry Resources

    External Quote Links


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    Core Cache Last Updated: 10/4/2026