Greenwich Lifesciences Inc
Ownership
Ownership Structure
Who owns Greenwich Lifesciences Inc (GLSI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 52.1% of the shares are freely tradable; institutional investors hold 12.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 2.96 | 433,860 | +16.8 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.03 | 298,266 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 1.06 | 155,466 | +2.5 | 03/31/2026 |
| State Street Corp | 0.91 | 133,875 | +36.9 | 03/31/2026 |
| Nuveen, LLC | 0.60 | 88,717 | +0.0 | 03/31/2026 |
| Northern Trust Corp | 0.51 | 75,125 | +2.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.36 | 199,015 | +0.0 | 07/31/2026 |
| iShares Russell 2000 ETF | 1.21 | 177,942 | -0.6 | 08/31/2026 |
| Fidelity Small Cap Index | 0.50 | 73,669 | +13.2 | 06/30/2026 |
| Vanguard Institutional Extnd Mkt Idx Tr | 0.49 | 72,268 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Patel Snehal | CEO and CFO | 5,611,402 | 103,249,797 $ | Jul 29, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jul 29, 2026 | Patel Snehal | CEO and CFO | Buy | 700 | 13.10 | 9,170 |
| Jul 28, 2026 | Patel Snehal | CEO and CFO | Buy | 1,500 | 13.59 | 20,385 |
| Jul 27, 2026 | Patel Snehal | CEO and CFO | Buy | 1,500 | 13.62 | 20,430 |
| Jul 24, 2026 | Patel Snehal | CEO and CFO | Buy | 1,100 | 12.88 | 14,168 |
| Jul 23, 2026 | Patel Snehal | CEO and CFO | Buy | 2,500 | 13.14 | 32,850 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.