Positive News SentimentPositive NewsNASDAQ:GLSI Greenwich LifeSciences (GLSI) Stock Price, News & Analysis $15.45 +0.39 (+2.59%) Closing price 09/11/2026 04:00 PM EasternExtended Trading$15.59 +0.14 (+0.91%) As of 09/11/2026 07:49 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more. Add Compare Share Share Stock Analysis Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsInsider TradesNews and TrendsOwnershipSEC FilingsShort Interest About Greenwich LifeSciences Stock (NASDAQ:GLSI) View Price History Chart DataSkip Price History Chart 1 Day 5 Days 30 Days 90 Days 1 Year Advanced 1 Day 1 Day 5 Days 30 Days 90 Days 1 Year Advanced Show volume Show extended hours Get Greenwich LifeSciences alerts:Sign Up Key Stats Today's Range$15.09▼$15.6050-Day Range$12.77▼$20.4452-Week Range$7.78▼$34.10Volume74,806 shsAverage Volume114,603 shsMarket Capitalization$226.78 millionP/E RatioN/ADividend YieldN/APrice Target$69.00Consensus RatingHold Company Overview Greenwich LifeSciences, Inc. (NASDAQ: GLSI) is a clinical-stage biotechnology company focused on the development of novel immune modulators for the treatment of cancer and autoimmune diseases. The company’s product pipeline includes candidates engineered to activate or regulate key components of the innate and adaptive immune systems, with programs advancing through preclinical and early-stage clinical studies. Headquartered in Greenwich, Connecticut, Greenwich LifeSciences conducts its research and development activities primarily in the United States. The company leverages proprietary technologies to identify immune-modulating compounds and works with contract research organizations to support its preclinical and clinical programs. Greenwich LifeSciences pursues strategic collaborations and licensing arrangements to expand its scientific expertise and accelerate the progress of its therapeutic candidates. With a focus on unmet medical needs in oncology and inflammatory disorders, the company aims to bring first-in-class or best-in-class treatments to patients through disciplined clinical development and regulatory strategies.AI Generated. May Contain Errors. Read More Greenwich LifeSciences Stock Analysis - MarketRank™See Top-Rated MarketRank™ Stocks54th Percentile Overall ScoreGLSI MarketRank™: Greenwich LifeSciences scored higher than 54% of companies evaluated by MarketBeat, and ranked 480th out of 904 stocks in the healthcare sector. Scores are calculated by averaging available category scores, with extra weight given to analysis and valuation. Analyst's Opinion3.4 / 5Analyst RatingHold Consensus RatingGreenwich LifeSciences has received a consensus rating of Hold. The company's average rating score is 2.00, and is based on no strong buy ratings, 1 buy rating, no hold ratings, and 1 sell rating.Upside PotentialGreenwich LifeSciences has a consensus price target of $69.00, representing about 346.6% upside from its current price of $15.45.Amount of Analyst CoverageGreenwich LifeSciences has only been the subject of 2 research reports in the past 90 days.Read more about Greenwich LifeSciences' stock forecast and price target. Earnings and Valuation0.6 / 5Proj. Earnings GrowthGrowing Earnings GrowthEarnings for Greenwich LifeSciences are expected to grow in the coming year, from ($1.38) to ($1.17) per share.Price to Earnings Ratio vs. the MarketThe P/E ratio of Greenwich LifeSciences is -10.03, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.Price to Earnings Ratio vs. SectorThe P/E ratio of Greenwich LifeSciences is -10.03, which means that its earnings are negative and its P/E ratio cannot be compared to companies with positive earnings.Price to Book Value per Share RatioGreenwich LifeSciences has a P/B Ratio of 515.00. P/B Ratios above 3 indicate that a company could be overvalued with respect to its assets and liabilities.Read more about Greenwich LifeSciences' valuation and earnings. Short Interest0.0 / 5Short Interest LevelBearish Percentage of Shares Shorted23.32% of the float of Greenwich LifeSciences has been sold short.Short Interest Ratio / Days to CoverGreenwich LifeSciences has a short interest ratio ("days to cover") of 11.35, which indicates bearish sentiment.Change versus previous monthShort interest in Greenwich LifeSciences has recently increased by 4.22%, indicating that investor sentiment is decreasing. Dividend0.0 / 5Dividend StrengthN/A Dividend YieldGreenwich LifeSciences does not currently pay a dividend.Dividend GrowthGreenwich LifeSciences does not have a long track record of dividend growth. News and Social Media3.6 / 5News SentimentN/A News SentimentGreenwich LifeSciences has a news sentiment score of 1.76. This score is calculated as an average of sentiment of articles about the company over the last seven days and ranges from 2 (good news) to -2 (bad news). This is a higher news sentiment than the 0.86 average news sentiment score of Healthcare companies.News Coverage This WeekMarketBeat has tracked 1 news article for Greenwich LifeSciences this week, compared to 3 articles on an average week.MarketBeat Follows2 people have added Greenwich LifeSciences to their MarketBeat watchlist in the last 30 days. Company Ownership3.6 / 5Insider TradingAcquiring Shares Net Insider BuyingOver the last three months, insiders have purchased a net $76,618.00 in company stock, which represents 0.0338% of the company's market cap.Insider Buying vs. Insider SellingIn the past three months, Greenwich LifeSciences insiders have bought more of their company's stock than they have sold. Specifically, they have bought $76,618.00 in company stock and sold $0.00 in company stock.Percentage Held by Insiders51.47% of the stock of Greenwich LifeSciences is held by insiders. A high percentage of insider ownership can be a sign of company health.Percentage Held by Institutions4.16% of the stock of Greenwich LifeSciences is held by institutions.Read more about Greenwich LifeSciences' insider trading history. Receive GLSI Stock News and Ratings via Email Sign-up to receive the latest news and ratings for Greenwich LifeSciences and its competitors with MarketBeat's FREE daily newsletter. Submit View SMS TermsSMS is currently available in Australia, Belgium, Canada, France, Germany, Ireland, Italy, New Zealand, the Netherlands, Singapore, South Africa, Spain, Switzerland, the United Kingdom, and the United States. By entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. 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The government has already taken stakes in companies like Intel, Lithium Americas, and MP Materials, while political rhetoric on both sides points toward deeper centralization. Stansberry has spent months investigating what this bipartisan shift could mean for investors navigating the months ahead.September 12 at 1:00 AM | Porter & Company (Ad)Greenwich LifeSciences Announces UK Regulatory Approval to Expand Phase III FLAMINGO-01 Breast Cancer TrialJuly 22, 2026 | quiverquant.comQGreenwich LifeSciences Announces Approval to Expand FLAMINGO-01 into the United KingdomJuly 22, 2026 | globenewswire.comGreenwich LifeSciences Updates FLAMINGO-01 Phase III Trial Design, Enrollment and Financial OutlookJuly 20, 2026 | quiverquant.comQGreenwich LifeSciences Provides Clinical Updates on FLAMINGO-01July 20, 2026 | globenewswire.comGreenwich LifeSciences Announces European Regulatory Review Allows Combined Enrollment of HLA-A*02 and Non-HLA-A*02 Patients in Phase III FLAMINGO-01 TrialJuly 16, 2026 | quiverquant.comQSee More Headlines GLSI Stock Analysis - Frequently Asked Questions How have GLSI shares performed this year? Greenwich LifeSciences' stock was trading at $21.01 at the beginning of the year. Since then, GLSI shares have decreased by 26.5% and is now trading at $15.45. How were Greenwich LifeSciences' earnings last quarter? Greenwich LifeSciences, Inc. (NASDAQ:GLSI) issued its quarterly earnings results on Tuesday, August, 11th. The company reported ($0.27) earnings per share for the quarter, beating analysts' consensus estimates of ($0.33) by $0.06. When did Greenwich LifeSciences IPO? Greenwich LifeSciences (GLSI) raised $8 million in an IPO on Friday, September 25th 2020. The company issued 1,260,870 shares at a price of $5.75-$6.75 per share. Aegis Capital served as the underwriter for the IPO. Who are Greenwich LifeSciences' major shareholders? Top institutional shareholders of Greenwich LifeSciences include BlackRock Inc. (3.31%), Bank of New York Mellon Corp (0.33%), GSA Capital Partners LLP (0.13%) and Ancora Advisors LLC (0.07%). Insiders that own company stock include Snehal Patel and Jaye Thompson. View institutional ownership trends. How do I buy shares of Greenwich LifeSciences? Shares of GLSI stock can be purchased through any online brokerage account. Popular online brokerages with access to the U.S. stock market include Charles Schwab, E*TRADE, Fidelity, and Vanguard Brokerage Services. What other stocks do shareholders of Greenwich LifeSciences own? Based on aggregate information from My MarketBeat watchlists, some other companies that Greenwich LifeSciences investors own include Zomedica (ZOM), Jumia Technologies (JMIA), Tesla (TSLA), Advanced Micro Devices (AMD), Netflix (NFLX), Meta Platforms (META) and NVIDIA (NVDA). Company Calendar Last Earnings8/11/2026Today9/12/2026Next Earnings (Estimated)11/13/2026Fiscal Year End12/31/2026Get Stock Alerts Health Indicator TradeSmith's Health IndicatorA long-term volatility-based measure designed for securities held 12 months or longer.Green: Strong and healthy uptrend with normal pullbacks.Yellow: Significant pullback but still within expected volatility.Red: Dropped beyond expected volatility; considered unhealthy. Red Zone (1m+) 1-Year History Sep 25 Dec 25 Mar 26 Jun 26 Sep 26 GLSI's financial health is in the Red zone, according to TradeSmith. GLSI has been in this zone for over one month. Industry, Sector and Symbol Stock ExchangeNASDAQ SectorHealthcare Industry Biotechnology Sub-IndustryBiotechnology Current SymbolNASDAQ:GLSI CIK1799788 Webwww.greenwichlifesciences.com Phone832-819-3232FaxN/AEmployees3Year Founded2006Price Target and Rating Average Price Target for Greenwich LifeSciences$69.00 High Price Target$69.00 Low Price Target$69.00 Potential Upside/Downside+346.6%Consensus RatingHold Rating Score (0-4)2.00 Research Coverage2 Analysts Profitability EPS (Trailing Twelve Months)($1.54) Trailing P/E RatioN/A Forward P/E RatioN/A P/E GrowthN/ANet Income-$19.36 million Net MarginsN/A Pretax MarginN/A Return on Equity-793.81% Return on Assets-295.32% Debt Debt-to-Equity RatioN/A Current Ratio1.54 Quick Ratio1.54 Sales & Book Value Annual SalesN/A Price / SalesN/A Cash FlowN/A Price / Cash FlowN/A Book Value$0.03 per share Price / Book515.00Miscellaneous Outstanding Shares14,678,000Free Float7,123,000Market Cap$226.78 million OptionableNot Optionable Beta1.47 Social Links Options Trading Made Easy - Download NowLearn the basics of options trading and how to use them to boost returns and manage risk with this free report from MarketBeat. Click the link below to get your free copy.Get This Free Report This page (NASDAQ:GLSI) was last updated on 9/12/2026 by MarketBeat.com Staff. From Our PartnersGold led me to Mount RushmoreA small miner just hit on gold in the hills surrounding Mount Rushmore, thanks to a breakthrough new technolog...Stansberry Research | SponsoredGold majors have a big problemNewmont spent 15 billion dollars acquiring Newcrest in 2023, the largest deal in gold mining history. Yet prod...Golden Portfolio | SponsoredWhy I'm NOT Buying the SpaceX IPO (And What I'm Buying Instead)Don't buy Nvidia... Not when the AI companies that will define the next decade are selling for pennies. You wo...Decentralized Masters | SponsoredThey didn't warn anyone in 1971. 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