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GLSI Overview

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ET
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Intellectia

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High
29.380
Open
29.340
VWAP
27.19
Vol
199.53K
Mkt Cap
404.97M
Low
26.000
Amount
5.42M
EV/EBITDA(TTM)
--
Total Shares
13.85M
EV
397.84M
EV/OCF(TTM)
--
P/S(TTM)
--
Greenwich LifeSciences, Inc. is a clinical-stage biopharmaceutical company focused on the development of GP2, an immunotherapy to prevent breast cancer recurrences in patients who have previously undergone surgery. GP2 is a 9-amino acid transmembrane peptide of the human epidermal growth factor receptor 2 (HER2) /neu protein, a cell surface receptor protein that is expressed in a variety of common cancers. It has commenced a Phase III clinical trial, Flamingo-01, an immunotherapy to prevent breast cancer recurrences. GP2 is delivered in combination with granulocyte-macrophage colony-stimulating factor (GM-CSF) to induce GP2 peptide-specific immunity. GP2 treatment is administered via an intradermal injection by mixing GP2 peptide and GM-CSF at the time of administration. Its cancer immunotherapy seeks to stimulate an individual's immune system to selectively attack cancer cells while not affecting normal cells or to deliver immune system components to inhibit the spread of cancer.
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Events Timeline

(ET)
2026-04-22
17:10:00
Greenwich LifeSciences Receives Nasdaq Compliance Notice
select
2026-04-20 (ET)
2026-04-20
06:20:00
Greenwich LifeSciences Presents Preliminary Data from FLAMINGO-01 Trial
select
2026-03-19 (ET)
2026-03-19
06:10:00
Greenwich LifeSciences Initiates New Clinical Trials in the US
select
2026-03-17 (ET)
2026-03-17
06:20:00
Greenwich LifeSciences Updates GLSI-100 Clinical Trial Progress
select
2026-03-16 (ET)
2026-03-16
06:30:00
Greenwich LifeSciences Updates on GP2 Drug Progress
select
2026-03-03 (ET)
2026-03-03
06:10:00
Greenwich LifeSciences Updates Patient Screening Rate for FLAMINGO-01 Trial
select

News

Newsfilter
9.5
10:43 AMNewsfilter
PinnedGreenwich LifeSciences Updates on 10-K Filing
  • Financial Reporting Progress: Greenwich LifeSciences is currently auditing its 10-K report for the fiscal year ending December 31, 2025, with final approval expected soon, although delays due to auditor coordination issues may impact investor confidence.
  • Accounts Payable Adjustments: The company reported significant increases in accounts payable due to unexpectedly high patient screening and enrollment in clinical trials in Europe during 2024 and 2025, but believes these adjustments do not materially affect its financial fundamentals.
  • Cash Flow Status: As of March 31, 2026, the company reported a cash balance of approximately $10.5 million, an improvement over 2025, and has retired over 75% of its accounts payable, indicating positive progress in financial management.
  • Clinical Trial Data: In the FLAMINGO-01 trial, over 1,300 patients have been screened, with preliminary analysis showing a 70-80% reduction in recurrence rates in the non-HLA-A*02 arm after completing the Primary Immunization Series, indicating the potential efficacy of GLSI-100.
NASDAQ.COM
9.0
15:04 PMNASDAQ.COM
Greenwich LifeSciences Reports Positive Phase 3 Data for Breast Cancer Vaccine
  • Clinical Trial Results: Greenwich LifeSciences presented positive Phase 3 FLAMINGO-01 data at ASCO, indicating that GLSI-100 achieved a 70%-80% reduction in recurrence rates among non-HLA-A*02 subjects, establishing a strong foundation for future market promotion.
  • Vaccine Composition and Mechanism: GLSI-100 is an investigational cancer vaccine containing GP2 peptide and Granulocyte Macrophage-stimulating factor (GM-CSF), aimed at preventing metastasis through immunotherapy targeting HER2+ breast cancer, showcasing its potential in tumor immunotherapy.
  • New Testing Arm Progress: A new testing arm of approximately 250 non-HLA-A*02 patients has completed enrollment, evaluating GLSI-100 administered via 6 intradermal injections over 6 months and 5 subsequent boosters over 2.5 years, further validating its immune response.
  • Market Reaction: GLSI is currently trading at $27.73, up 5.94%, reflecting positive investor sentiment towards the clinical data of the vaccine, which may drive further growth in the biopharmaceutical sector.
stocktwits
9.5
12:10 PMstocktwits
Greenwich LifeSciences Updates Financial Status Amid Nasdaq Filing Delay
  • Financial Status Update: Greenwich LifeSciences reported that the delay in its 2025 annual report audit does not materially affect its cash position, with an unaudited cash balance of approximately $10.5 million as of March 31, 2026, ensuring business fundamentals remain stable.
  • Clinical Trial Progress: The company is conducting the Flamingo-01 trial for GLSI-100, having screened over 1,300 patients, with preliminary data indicating a 70% to 80% reduction in breast cancer recurrence rates after the initial six-dose treatment series, showcasing promising therapeutic potential.
  • Nasdaq Compliance Notice: Greenwich received a compliance notice from Nasdaq on April 22, 2026, for failing to file its annual Form 10-K on time, with subsequent notices indicating ongoing audits involving accounts payable adjustments related to patient screening and enrollment.
  • Positive Investor Sentiment: Retail sentiment on Stocktwits remains bullish with extremely high message volumes, and the stock has gained nearly 24% year-to-date, reflecting strong market interest and confidence in the Flamingo trial.
seekingalpha
7.0
05-22seekingalpha
Greenwich LifeSciences Receives Nasdaq Notification on Compliance
  • Compliance Notification: Greenwich LifeSciences (GLSI) received a notification from Nasdaq on Friday indicating non-compliance with listing rules due to the late filing of its Quarterly Report on Form 10-Q for the three months ended March 31, 2026, although the notice does not have an immediate effect on the listing or trading of the company's common stock.
  • Impact of Filing Delay: The failure to submit the quarterly report on time may affect investor confidence, leading to concerns about the company's future financial transparency, which could exert negative pressure on the stock price.
  • Market Reaction: Despite the compliance notification, the market's response to Greenwich LifeSciences has been relatively stable, indicating that investor confidence in the company's fundamentals has not been significantly impacted.
  • Future Outlook: The company must resolve the compliance issue promptly to avoid further regulatory actions and ensure its continued listing on Nasdaq, thereby maintaining investor trust and market reputation.
seekingalpha
7.0
04-22seekingalpha
Greenwich LifeSciences Receives Nasdaq Notification Regarding 10-K Filing
  • Nasdaq Compliance Notification: Greenwich LifeSciences received a notification from Nasdaq indicating non-compliance due to the failure to file its 10-K report for the fiscal year ending December 31, 2025, although this notice does not have an immediate impact on the listing or trading of its stock.
  • Stock Trading Status: The company's common stock continues to trade on the Nasdaq Capital Market under the symbol 'GLSI', indicating that despite compliance issues, the liquidity of its shares remains unaffected in the market.
  • Future Plans: The company intends to file its 10-K for the fiscal year 2025 as soon as possible, demonstrating a proactive approach to resolving compliance issues and aiming to restore full compliance with Nasdaq regulations.
  • Investor Attention: Despite facing compliance challenges, recent open-label data and patent claims from Greenwich LifeSciences continue to attract investor interest, which may influence its future market performance.
stocktwits
8.5
04-20stocktwits
Greenwich LifeSciences Expands Vaccine Trial to Broader Patient Population
  • Trial Expansion Plans: CEO Snehal Patel announced that the FDA has reviewed plans to expand the trial to include all patient types, with over 1,300 patients enrolled, indicating a significant market opportunity for the breast cancer vaccine.
  • Significant Immune Response Increase: Data presented at the 2026 AACR Annual Meeting revealed that the vaccine candidate GLSI-100 showed nearly a 4-fold increase in immune response in non-HLA-A*02 patients, with some patients improving by 2 to 8 times, demonstrating its broader applicability.
  • Clinical Trial Results: In the Phase III FLAMINGO-01 trial, delayed-type hypersensitivity (DTH) responses in the specific HLA-A*02 patient cohort increased fourfold from month 4 to 6 of treatment, indicating significant immune activation by the vaccine.
  • Positive Market Reaction: Shares of Greenwich LifeSciences rose over 2% in premarket trading on Monday, and the stock has increased by over 28% year-to-date, reflecting bullish sentiment among retail investors regarding the company's prospects.
Wall Street analysts forecast GLSI stock price to rise
2 Analyst Rating
Wall Street analysts forecast GLSI stock price to rise
2 Buy
0 Hold
0 Sell
Moderate Buy
Current: 0.000
sliders
Low
45.00
Averages
47.50
High
50.00
Current: 0.000
sliders
Low
45.00
Averages
47.50
High
50.00
H.C. Wainwright
Buy
upgrade
$39 -> $50
AI Analysis
2025-12-30
Reason
H.C. Wainwright
Price Target
$39 -> $50
AI Analysis
2025-12-30
upgrade
Buy
Reason
H.C. Wainwright raised the firm's price target on Greenwich LifeSciences to $50 from $39 and keeps a Buy rating on the shares. The firm cites the positive efficacy in the non-HLA-A*02 arm of the ongoing Phase 3 FLAMINGO-01 trial of GLSI-100 in breast cancer for the target boost. GLSI-100 reduced breast cancer recurrence by 80% in the non- HLA-A*02 arm, the analyst tells investors in a research note. H.C. Wainwright views the preliminary data as "highly encouraging," saying it could double the market for GLSI-100.
Noble Capital
Outperform
initiated
$45
2025-08-20
Reason
Noble Capital
Price Target
$45
2025-08-20
initiated
Outperform
Reason
Noble Capital initiated coverage of Greenwich LifeSciences with an Outperform rating and $45 price target. Greenwich is developing GSLI-100, which has completed four clinical trials that lead to the design of the current Phase 3 Flamingo-01 trial for prevention of breast cancer recurrence in high-risk patients, the analyst tells investors. The firm, which estimates market entry by FY28, sees \"large market potential\" for GLSI-100.
Unlock Full Analyst Thesis, Get the complete breakdown of rating reason for GLSI
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Valuation Metrics

The current forward P/E ratio for Greenwich Lifesciences Inc (GLSI.O) is 0.00, compared to its 5-year average forward P/E of -23.59. For a more detailed relative valuation and DCF analysis to assess Greenwich Lifesciences Inc's fair value, Click here.

Forward PE

The forward P/E ratio is a valuation metric that divides a company's current stock price by its estimated future earnings per share over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average PE
-23.59
Current PE
0.00
Overvalued PE
-1.29
Undervalued PE
-45.88

Forward EV/EBITDA

The forward EV/EBITDA ratio is a valuation metric that divides a company's enterprise value (EV) by its estimated future earnings before interest, taxes, depreciation, and amortization (EBITDA) over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average EV/EBITDA
0.00
Current EV/EBITDA
0.00
Overvalued EV/EBITDA
0.00
Undervalued EV/EBITDA
0.00

Forward PS

The forward P/S ratio is a valuation metric that divides a company's current stock price by its estimated future sales (or revenue) per share over the next 12 months.
StronglyUndervaluedUndervaluedFairOvervaluedStronglyOvervalueddotted line Image
N/A
5Y Average PS
0.00
Current PS
0.00
Overvalued PS
0.00
Undervalued PS
0.00

Financials

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Frequently Asked Questions

What is Greenwich Lifesciences Inc (GLSI) stock price today?

The current price of GLSI is 26.175 USD — it has decreased -9.71

What is Greenwich Lifesciences Inc (GLSI)'s business?

Greenwich LifeSciences, Inc. is a clinical-stage biopharmaceutical company focused on the development of GP2, an immunotherapy to prevent breast cancer recurrences in patients who have previously undergone surgery. GP2 is a 9-amino acid transmembrane peptide of the human epidermal growth factor receptor 2 (HER2) /neu protein, a cell surface receptor protein that is expressed in a variety of common cancers. It has commenced a Phase III clinical trial, Flamingo-01, an immunotherapy to prevent breast cancer recurrences. GP2 is delivered in combination with granulocyte-macrophage colony-stimulating factor (GM-CSF) to induce GP2 peptide-specific immunity. GP2 treatment is administered via an intradermal injection by mixing GP2 peptide and GM-CSF at the time of administration. Its cancer immunotherapy seeks to stimulate an individual's immune system to selectively attack cancer cells while not affecting normal cells or to deliver immune system components to inhibit the spread of cancer.

What is the price predicton of GLSI Stock?

Wall Street analysts forecast GLSI stock price to rise over the next 12 months. According to Wall Street analysts, the average 1-year price target for GLSI is47.50 USD with a low forecast of 45.00 USD and a high forecast of 50.00 USD. However, analyst price targets are subjective and often lag stock prices, so investors should focus on the objective reasons behind analyst rating changes, which better reflect the company's fundamentals.

What is Greenwich Lifesciences Inc (GLSI)'s revenue for the last quarter?

Greenwich Lifesciences Inc revenue for the last quarter amounts to 0.00 USD, decreased

What is Greenwich Lifesciences Inc (GLSI)'s earnings per share (EPS) for the last quarter?

Greenwich Lifesciences Inc. EPS for the last quarter amounts to -0.30 USD, increased 50.00

How many employees does Greenwich Lifesciences Inc (GLSI). have?

Greenwich Lifesciences Inc (GLSI) has 4 emplpoyees as of June 01 2026.

What is Greenwich Lifesciences Inc (GLSI) market cap?

Today GLSI has the market capitalization of 404.97M USD.