Stock Analysis

Greenwich LifeSciences, Inc. (NASDAQ:GLSI) CEO Snehal Patel's holdings dropped 12% in value as a result of the recent pullback

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Key Insights

To get a sense of who is truly in control of Greenwich LifeSciences, Inc. (NASDAQ:GLSI), it is important to understand the ownership structure of the business. With 53% stake, individual insiders possess the maximum shares in the company. Put another way, the group faces the maximum upside potential (or downside risk).

And last week, insiders endured the biggest losses as the stock fell by 12%.

In the chart below, we zoom in on the different ownership groups of Greenwich LifeSciences.

Check out our latest analysis for Greenwich LifeSciences

ownership-breakdown
NasdaqCM:GLSI Ownership Breakdown September 29th 2025

What Does The Institutional Ownership Tell Us About Greenwich LifeSciences?

Many institutions measure their performance against an index that approximates the local market. So they usually pay more attention to companies that are included in major indices.

We can see that Greenwich LifeSciences does have institutional investors; and they hold a good portion of the company's stock. This suggests some credibility amongst professional investors. But we can't rely on that fact alone since institutions make bad investments sometimes, just like everyone does. If multiple institutions change their view on a stock at the same time, you could see the share price drop fast. It's therefore worth looking at Greenwich LifeSciences' earnings history below. Of course, the future is what really matters.

earnings-and-revenue-growth
NasdaqCM:GLSI Earnings and Revenue Growth September 29th 2025

Greenwich LifeSciences is not owned by hedge funds. With a 41% stake, CEO Snehal Patel is the largest shareholder. With 4.6% and 2.9% of the shares outstanding respectively, David McWilliams and Kenneth Hallock are the second and third largest shareholders. Interestingly, the third-largest shareholder, Kenneth Hallock is also a Member of the Board of Directors, again, indicating strong insider ownership amongst the company's top shareholders.

On looking further, we found that 51% of the shares are owned by the top 4 shareholders. In other words, these shareholders have a meaningful say in the decisions of the company.

Researching institutional ownership is a good way to gauge and filter a stock's expected performance. The same can be achieved by studying analyst sentiments. There is some analyst coverage of the stock, but it could still become more well known, with time.

Insider Ownership Of Greenwich LifeSciences

The definition of an insider can differ slightly between different countries, but members of the board of directors always count. The company management answer to the board and the latter should represent the interests of shareholders. Notably, sometimes top-level managers are on the board themselves.

Insider ownership is positive when it signals leadership are thinking like the true owners of the company. However, high insider ownership can also give immense power to a small group within the company. This can be negative in some circumstances.

Our information suggests that insiders own more than half of Greenwich LifeSciences, Inc.. This gives them effective control of the company. Given it has a market cap of US$142m, that means they have US$75m worth of shares. It is good to see this level of investment. You can check here to see if those insiders have been buying recently.

General Public Ownership

The general public-- including retail investors -- own 36% stake in the company, and hence can't easily be ignored. This size of ownership, while considerable, may not be enough to change company policy if the decision is not in sync with other large shareholders.

Next Steps:

While it is well worth considering the different groups that own a company, there are other factors that are even more important. Be aware that Greenwich LifeSciences is showing 2 warning signs in our investment analysis , you should know about...

But ultimately it is the future, not the past, that will determine how well the owners of this business will do. Therefore we think it advisable to take a look at this free report showing whether analysts are predicting a brighter future.

NB: Figures in this article are calculated using data from the last twelve months, which refer to the 12-month period ending on the last date of the month the financial statement is dated. This may not be consistent with full year annual report figures.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.