GLSI

Greenwich Lifesciences Inc

GLSI.US greenwichlifesciences.com + Research + Basket
CIK 0001799788
Employees 4
Phone 832-819-3232
Fiscal year end December
IPO Sep 25, 2020
Address Building 14, Stafford, TX, United States, 77477
16.35
+0.43 (+2.70%)
USD · NASDAQ
52-week range
7.78
34.10
Trading at 33% of the 52-week range
Market Cap
233.68M
P/E Ratio
0.00
Forward P/E
0.00
Book Value
0.21
Div. Yield
N/A
% Institutions
12.39%
% Insiders
47.91%

1 Year

+102.1%

3 Year

+56.8%

10 Year

+227.0%
Description

Greenwich LifeSciences, Inc., a clinical-stage biopharmaceutical company, develops novel cancer immunotherapies for breast cancer and other HER2/neu-expressing cancers in the United States. Its lead product candidate is GP2, a HER2/neu transmembrane peptide, which is in Phase III clinical trial to prevent breast cancer recurrences in patients. The company also develops FLAMINGO-01, which is in Phase IIb and 3 Phase I clinical trial designed to evaluate the safety and efficacy of GLSI-100 in HER2 positive breast cancer patients. Greenwich LifeSciences, Inc. was formerly known as Norwell, Inc. and changed its name to Greenwich LifeSciences, Inc. in March 2018. The company was incorporated in 2006 and is headquartered in Stafford, Texas.

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People

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Directors & Officers

Name Title Year Born
Mr. Snehal S. Patel CEO, CFO & Director 1964
Mr. Eric Rothe Founder & Independent Director 1975
Dr. Frank Joseph Daugherty M.D. Chief Medical Officer & Director 1950
Dr. Jaye L. Thompson Ph.D. Vice President Clinical & Regulatory Affairs 1966
Dr. Christine T. Fischette Ph.D. VP of Business Development 1951

Insider Trading

Open insider trading
Date Insider Name Title Transaction Type Shares Price Value SEC
Jan 13, 2026 Snehal Patel N/A Purchase 1.80K $29.83 $53.69K SEC
Jan 12, 2026 Snehal Patel N/A Purchase 2.90K $27.54 $79.87K SEC
Dec 31, 2025 Snehal Patel N/A Purchase 4.30K $21.36 $91.85K SEC
Dec 30, 2025 Snehal Patel N/A Purchase 2.90K $21.73 $63.02K SEC
Dec 18, 2025 Snehal Patel N/A Purchase 4.10K $12.62 $51.74K SEC
Nov 25, 2025 Snehal Patel N/A Purchase 4.60K $8.37 $38.50K SEC
Nov 07, 2025 Snehal Patel N/A Purchase 10.60K $8.43 $89.36K SEC
Oct 31, 2025 Snehal Patel N/A Purchase 2.30K $9.26 $21.30K SEC

Shareholders

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Institutional Holders

Holder Name Shares Date Reported % Out Value % Change
BlackRock Inc 485.85K Jun 30, 2026 3.31% $0.00 11.98%
Vanguard Capital Management, LLC 278.19K Jun 30, 2026 1.90% $0.00 -6.73%
Geode Capital Management, LLC 168.18K Jun 30, 2026 1.15% $0.00 8.18%
State Street Corp 143.09K Jun 30, 2026 0.97% $0.00 6.88%
Vanguard Portfolio Management, LLC 80.86K Jun 30, 2026 0.55% $0.00 37.26%
Northern Trust Corp 80.23K Jun 30, 2026 0.55% $0.00 6.79%
Bank of New York Mellon Corp 47.90K Jun 30, 2026 0.33% $0.00 2.96%
Vanguard Fiduciary Trust Co 45.97K Jun 30, 2026 0.31% $0.00 2.35%
Morgan Stanley - Brokerage Accounts 43.45K Jun 30, 2026 0.30% $0.00 45.66%
The Goldman Sachs Group Inc 39.33K Jun 30, 2026 0.27% $0.00 -0.49%
Jane Street Group LLC 27.69K Jun 30, 2026 0.19% $0.00 0.00%
UBS Group AG 23.41K Jun 30, 2026 0.16% $0.00 10.86%
State Of Wisconsin Investment Board 22.64K Jun 30, 2026 0.15% $0.00 11.31%
GSA Capital Partners LLP 19.54K Jun 30, 2026 0.13% $0.03 0.00%
Massachusetts Financial Services Company 17.92K Jun 30, 2026 0.12% $0.00 0.00%
STRS OHIO 17.80K Jun 30, 2026 0.12% $0.00 29.93%
Charles Schwab Investment Management Inc 17.10K Jun 30, 2026 0.12% $0.00 2.98%
Vanguard Global Advisers, LLC 11.87K Jun 30, 2026 0.08% $0.00 14.86%
Ancora Advisors LLC 10.74K Jun 30, 2026 0.07% $0.00 -71.36%
Stifel Financial Corp 10.02K Jun 30, 2026 0.07% $0.00 0.00%

Fund Holdings

Rank Holder Name Shares Held % of Shares Change Date Reported
1 Vanguard MStar Total Stk Mkt Idx Invest 199.02K 1.36% ▲ 0.00% Sep 30, 2026
2 iShares Russell 2000 ETF 195.54K 1.33% ▼ 0.40% Oct 29, 2026
3 Fidelity Small Cap Index 74.35K 0.51% ▲ 0.92% Jul 31, 2026
4 iShares Russell 2000 Growth ETF 73.35K 0.50% ▲ 0.25% Oct 29, 2026
5 Vanguard Russell 2000 ETF 45.53K 0.31% ▲ 17.87% Sep 30, 2026
6 Vanguard US Momentum Factor ETF 38.22K 0.26% ▲ 11.51% Sep 30, 2026
7 Fidelity Extended Market Index 33.39K 0.23% ▲ 10.53% Aug 31, 2026
8 iShares Micro-Cap ETF 23.58K 0.16% ▲ 0.00% Oct 29, 2026
9 Ancora/Thelen Small-Mid Cap I 20.00K 0.14% ▲ 0.00% Sep 30, 2026
10 Schwab Small Cap Index 19.16K 0.13% ▲ 18.16% Sep 30, 2026

Financial Highlights

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Market Cap: $233.68M
EBITDA: $-22.66M
Book Value: $0.21
Earnings/Share: $-1.53
Profit Margin: 0.00%
Operating Margin: 0.00%
ROA (TTM): -235.98%
ROE (TTM): -986.32%
Revenue (TTM): $0.00
Revenue/Share (TTM): $0.00
Earnings Growth (YOY): 0.00%
Revenue Growth (YOY): 0.00%

Valuation Metrics

Enterprise Value: $231.99M
Trailing P/E: 0.00
Forward P/E: 0.00

Shares Statistics

Shares Outstanding: 14.68M
Shares Float: 7.65M
% Insiders: 47.91%
% Institutions: 12.39%
Shares Short: 1.55M
Shares Short (Prior Month): 1.58M
Short Ratio: 11.01
Short % Float: 20.28%

Stock Price History

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1 Year Price History

3 Years Price History

10 Years Price History

Max Price History

Financial Charts

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Open balance sheet Open capital intensity Download Financials (Excel)

Revenue, Net Income & Operating Cash Flow (Yearly)

Change % vs Prior Year

Revenue, Net Income & Operating Cash Flow (Quarterly)

Change % vs Prior Quarter

Operating Expenses (Yearly)

Operating Expenses (Quarterly)

Balance Sheet (Yearly)

Balance Sheet (Quarterly)

Assets Breakdown (Yearly)

Assets Breakdown (Quarterly)

Liabilities Breakdown (Yearly)

Liabilities Breakdown (Quarterly)

Income Statement Waterfall

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Open full waterfall Open balance sheet
Line Item
Step Type
Value
Revenue
adjust
$0.00
Cost of Goods Sold
adjust
$-1.78K
Gross Profit
subtotal
$-1.78K
SG&A
adjust
$-2.23M
R&D
adjust
$-17.22M
Operating Income
subtotal
$-19.45M
Other / Non-Operating Items
adjust
$89.70K
Net Income
subtotal
$-19.36M

Earnings Per Share (EPS) History

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Financial Ratios

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📦 Raw API Data (JSON Explorer)

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