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Greenwich LifeSciences, Inc. (GLSI) institutional ownership

Market cap$163M SectorHealthcare
Funds holding · Q1 2026
58
reported GLSI position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
37 buyers · 21 sellers

Greenwich LifeSciences, Inc. (GLSI) price and institutional activity

Dates

Q1 2026

$0 bought by 37 investors
VanguardNuveen, LLC +35 more
$0 sold by 21 investors
Credit Agricole S AVirtu Financial LLC +19 more
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Bought Sold Totals per quarter; hover a bar for the names.

Greenwich LifeSciences, Inc. (GLSI) institutional activity · 58

Investor Type Est. change Change Δ Own Date
Vanguard · Added
Change +116K Date Q1 2026
Vanguard Added· Q1 2026 +116K Q1 2026
Nuveen, LLC · New
Change +89K Date Q1 2026
Nuveen, LLC New· Q1 2026 +89K Q1 2026
Credit Agricole S A · Exited
Change −87K Δ Own −100.0% Date Q1 2026
Credit Agricole S A Exited· Q1 2026 −87K −100.0% Q1 2026
BlackRock · Added
Change +62K Date Q1 2026
BlackRock Added· Q1 2026 +62K Q1 2026
Russell Investments Group, Ltd. · Added
Change +39K Date Q1 2026
Russell Investments Group, Ltd. Added· Q1 2026 +39K Q1 2026
Ancora Advisors LLC · New
Change +38K Date Q1 2026
Ancora Advisors LLC New· Q1 2026 +38K Q1 2026
State Street · Added
Change +36K Date Q1 2026
State Street Added· Q1 2026 +36K Q1 2026
Bank of New York Mellon Corp · Added
Change +33K Date Q1 2026
Bank of New York Mellon Corp Added· Q1 2026 +33K Q1 2026
Virtu Financial LLC · Exited
Change −29K Δ Own −100.0% Date Q1 2026
Virtu Financial LLC Exited· Q1 2026 −29K −100.0% Q1 2026
Man Group PLC · Exited
Change −28K Δ Own −100.0% Date Q1 2026
Man Group PLC Exited· Q1 2026 −28K −100.0% Q1 2026
Marshall Wace, LLP · New
Change +26K Date Q1 2026
Marshall Wace, LLP New· Q1 2026 +26K Q1 2026
Informed Momentum Co LLC · New
Change +21K Date Q1 2026
Informed Momentum Co LLC New· Q1 2026 +21K Q1 2026
State of Wisconsin Investment Board · New
Change +20K Date Q1 2026
State of Wisconsin Investment Board New· Q1 2026 +20K Q1 2026
Goldman Sachs Group Inc · Added
Change +18K Date Q1 2026
Goldman Sachs Group Inc Added· Q1 2026 +18K Q1 2026
Millennium Management LLC · New
Change +17K Date Q1 2026
Millennium Management LLC New· Q1 2026 +17K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 58

Famous investor activity in Greenwich LifeSciences, Inc. (GLSI)

Greenwich LifeSciences, Inc. (GLSI) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Patel Snehal · Director, Officer, 10% Owner Buy +$54K
Price $29.83 Qty +2K Owned 5.6M Trade date Jan 13, 2026 Filed date Jan 15, 2026
Patel Snehal Director, Officer, 10% Owner Buy $29.83 +2K +$54K 5.6M Jan 13, 2026 Jan 15, 2026
Patel Snehal · Director, Officer, 10% Owner Buy +$80K
Price $27.54 Qty +3K Owned 5.6M Trade date Jan 12, 2026 Filed date Jan 14, 2026
Patel Snehal Director, Officer, 10% Owner Buy $27.54 +3K +$80K 5.6M Jan 12, 2026 Jan 14, 2026
Patel Snehal · Director, Officer, 10% Owner Buy +$92K
Price $21.36 Qty +4K Owned 5.6M Trade date Dec 31, 2025 Filed date Jan 5, 2026
Patel Snehal Director, Officer, 10% Owner Buy $21.36 +4K +$92K 5.6M Dec 31, 2025 Jan 5, 2026
Patel Snehal · Director, Officer, 10% Owner Buy +$63K
Price $21.73 Qty +3K Owned 5.6M Trade date Dec 30, 2025 Filed date Jan 2, 2026
Patel Snehal Director, Officer, 10% Owner Buy $21.73 +3K +$63K 5.6M Dec 30, 2025 Jan 2, 2026
Patel Snehal · Director, Officer, 10% Owner Buy +$52K
Price $12.62 Qty +4K Owned 5.6M Trade date Dec 18, 2025 Filed date Dec 19, 2025
Patel Snehal Director, Officer, 10% Owner Buy $12.62 +4K +$52K 5.6M Dec 18, 2025 Dec 19, 2025
Patel Snehal · Director, Officer, 10% Owner Buy +$39K
Price $8.37 Qty +5K Owned 5.6M Trade date Nov 25, 2025 Filed date Nov 28, 2025
Patel Snehal Director, Officer, 10% Owner Buy $8.37 +5K +$39K 5.6M Nov 25, 2025 Nov 28, 2025
Patel Snehal · Director, Officer, 10% Owner Grant (A) 100K
Owned 2.3M Trade date Nov 13, 2025 Filed date Nov 17, 2025
Patel Snehal Director, Officer, 10% Owner Grant (A) 100K 2.3M Nov 13, 2025 Nov 17, 2025
Patel Snehal · Director, Officer, 10% Owner Buy +$89K
Price $8.43 Qty +11K Owned 5.6M Trade date Nov 7, 2025 Filed date Nov 12, 2025
Patel Snehal Director, Officer, 10% Owner Buy $8.43 +11K +$89K 5.6M Nov 7, 2025 Nov 12, 2025
Patel Snehal · Director, Officer, 10% Owner Buy +$21K
Price $9.26 Qty +2K Owned 5.6M Trade date Oct 31, 2025 Filed date Nov 4, 2025
Patel Snehal Director, Officer, 10% Owner Buy $9.26 +2K +$21K 5.6M Oct 31, 2025 Nov 4, 2025
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Greenwich LifeSciences, Inc. (GLSI) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Weiner Michael Guy 2.3M
% of shares outstanding 17.7% Filing date Jun 22, 2022
Weiner Michael Guy 2.3M 17.7% Jun 22, 2022
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Greenwich LifeSciences, Inc. (GLSI) ownership FAQ

Who owns GLSI?

58 reporting institutions disclosed GLSI position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.