GLSI (Greenwich LifeSciences) Insider Ownership: 49.66 % (As of Aug. 01, 2026)

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GLSI Greenwich LifeSciences Inc GLSI
35 GF Score
Price $13.59
! 1 Warning Sign
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What is Greenwich LifeSciences Insider Ownership?

Greenwich LifeSciences GLSI -4.05% 35 Insider Ownership is 49.66 % as of Aug. 01, 2026. GuruFocus rates GLSI with a GF Score™ of 35/100. The stock has 1 warning sign investors should review.

Insider ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, Greenwich LifeSciences's insider ownership is 49.66%.

Institutional Ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, Greenwich LifeSciences's Institutional Ownership is 11.70%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, Greenwich LifeSciences's Float Percentage Of Total Shares Outstanding is 52.13%.

Greenwich LifeSciences Insider Ownership Historical Data

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The historical data trend for Greenwich LifeSciences's Insider Ownership can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Greenwich LifeSciences Insider Ownership Chart

Greenwich LifeSciences Historical Data

The historical data trend for Greenwich LifeSciences can be seen below:

2025-06-30 2025-07-31 2025-08-31 2025-09-30 2025-10-31 2025-11-30 2026-01-31 2026-02-28 2026-05-31 2026-06-30
Insider Ownership 54.28 54.28 53.23 53.23 53.23 52.50 52.61 52.61 52.61 49.66
GLSI
35GF Score
Greenwich LifeSciences Inc GLSI
Insider Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
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Greenwich LifeSciences Insider Ownership Calculation

The percentage of shares that are owned by company insiders relative to the total shares outstanding.

Frequently Asked Questions Learn more about Insider Ownership →
What does a Insider Ownership of 49.66 % mean?
Greenwich LifeSciences (GLSI) has a Insider Ownership of 49.66 % as of Aug. 01, 2026. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Greenwich LifeSciences and its competitors.
Is Greenwich LifeSciences' Insider Ownership too high?
Greenwich LifeSciences' current Insider Ownership is 49.66 %. Overall, Greenwich LifeSciences has a GF Score™ of 35/100, reflecting its overall financial health beyond just this single metric.
How does Greenwich LifeSciences' Insider Ownership compare to PLX and DTIL?
Greenwich LifeSciences' Insider Ownership of 49.66 % can be compared against companies in the Biotechnology industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Insider Ownership for a Biotechnology company?
A good Insider Ownership depends on the Biotechnology industry context. However, Insider Ownership should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Insider Ownership mean?
A high Insider Ownership can signal that a stock is expensive relative to its fundamentals. Insider ownership equals the percent of shares owned by company insiders relative to total shares. View historical data on Greenwich LifeSciences and its competitors. Greenwich LifeSciences's current Insider Ownership is 49.66 %. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Greenwich LifeSciences stock overvalued right now?
Greenwich LifeSciences (GLSI) has a current Insider Ownership of 49.66 %. The current Insider Ownership is 49.66 %. Greenwich LifeSciences' overall GF Score™ is 35/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Insider Ownership calculated?
Insider Ownership is calculated from a company's financial statements. For Greenwich LifeSciences (GLSI), the current Insider Ownership is 49.66 % as of Aug. 01, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Greenwich LifeSciences Business Description

Address 3992 Bluebonnet Drive, Building 14, Stafford, TX, USA, 77477
Greenwich LifeSciences Inc a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, Flamingo-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences. GP2 is a 9 amino acid transmembrane peptide of the HER2/neu protein, a cell surface receptor protein that is expressed in a variety of common cancers, including expression in 75 percent of breast cancers at low (1+), intermediate (2+), and high (3+ or over-expressor) levels. The combination of GP2 + GM-CSF is called GLSI-100. The company is currently expanding Flamingo-01 into Europe with plans to open up to 150 sites globally.
35GF Score

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Insider Ownership is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

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