Greenwich LifeSciences, Inc.

GLSINASDAQHealthcare● Active

$21.65

$-0.60(-2.70%)

Market Cap$317783203

P/E Ratio—

52W High$34.1

52W Low$7.78

Avg Volume155K

Open$22.64

Beta1.38

Insider Trades Ownership Employees

Greenwich LifeSciences, Inc. (GLSI) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · GLSI · as of Jun 9, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

∞

Buy/Sell (by trades)

Overall sentiment

BULLISH

↑ Buy 100%Active transactions only · RSU vesting excluded0% Sell ↓

Greenwich LifeSciences, Inc. insiders have been net buyers of shares over the past 12 Months, which may signal confidence in the company's outlook.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 9, 2026

GLSI insider buying and selling by quarter

GLSI insider selling · GLSI insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

1.6M790K0

2024 Q1

2024 Q2

2024 Q3

2024 Q4

2025 Q1

2025 Q2

2025 Q4

2026 Q1

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 9, 2026

Active insiders

Most active in past 12 months · GLSI ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

GLSI executive sell shares · GLSI board member insider trading · GLSI insider trading SEC filing

Showing 84 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Jan 13, 2026	Patel Snehal CEO and CFO · Director	Purchase	1,800	$29.83	$54K	5,604,102	Form 4
Jan 12, 2026	Patel Snehal CEO and CFO · Director	Purchase	2,900	$27.54	$80K	5,602,302	Form 4
Dec 31, 2025	Patel Snehal CEO and CFO · Director	Purchase	4,300	$21.36	$92K	5,599,402	Form 4
Dec 30, 2025	Patel Snehal CEO and CFO · Director	Purchase	2,900	$21.73	$63K	5,595,102	Form 4
Dec 18, 2025	Patel Snehal CEO and CFO · Director	Purchase	4,100	$12.62	$52K	5,592,202	Form 4
Nov 25, 2025	Patel Snehal CEO and CFO · Director	Purchase	4,600	$8.37	$39K	5,588,102	Form 4
Nov 7, 2025	Patel Snehal CEO and CFO · Director	Purchase	10,600	$8.43	$89K	5,583,502	Form 4
Oct 31, 2025	Patel Snehal CEO and CFO · Director	Purchase	2,300	$9.26	$21K	5,572,902	Form 4
Apr 25, 2025	Patel Snehal CEO and CFO · Director	Purchase	3,600	$9.88	$36K	5,570,602	Form 4
Apr 17, 2025	Patel Snehal CEO and CFO · Director	Purchase	5,400	$8.98	$48K	5,567,002	Form 4
Apr 7, 2025	Patel Snehal CEO and CFO · Director	Purchase	3,600	$9.10	$33K	5,561,602	Form 4
Apr 4, 2025	Patel Snehal CEO and CFO · Director	Purchase	5,500	$8.73	$48K	5,558,002	Form 4
Jan 10, 2025	Patel Snehal CEO and CFO · Director	Purchase	2,500	$12.51	$31K	5,552,502	Form 4
Jan 7, 2025	Patel Snehal CEO and CFO · Director	Purchase	1,800	$13.75	$25K	5,550,002	Form 4
Jan 6, 2025	Patel Snehal CEO and CFO · Director	Purchase	1,100	$13.31	$15K	5,548,202	Form 4
Jan 3, 2025	Patel Snehal CEO and CFO · Director	Purchase	3,400	$12.95	$44K	5,547,102	Form 4
Jan 2, 2025	Patel Snehal CEO and CFO · Director	Purchase	2,000	$11.97	$24K	5,543,702	Form 4
Dec 31, 2024	Patel Snehal CEO and CFO · Director	Purchase	2,400	$11.36	$27K	5,541,702	Form 4
Dec 30, 2024	Patel Snehal CEO and CFO · Director	Purchase	3,200	$11.12	$36K	5,539,302	Form 4
Nov 21, 2024	Thompson Jaye VP Clinical Reg Affairs	Purchase	1,000	$12.91	$13K	264,148	Form 4
Sep 26, 2024	Patel Snehal CEO and CFO · Director	Purchase	1,500	$14.63	$22K	5,536,102	Form 4
Aug 12, 2024	Thompson Jaye VP Clinical Reg Affairs	Purchase	800	$13.85	$11K	263,148	Form 4
Aug 6, 2024	Patel Snehal CEO and CFO · Director	Purchase	2,000	$13.81	$28K	5,534,602	Form 4
Aug 5, 2024	Patel Snehal CEO and CFO · Director	Purchase	5,500	$13.18	$72K	5,532,602	Form 4
Aug 2, 2024	Thompson Jaye VP Clinical Reg Affairs	Purchase	1,000	$15.15	$15K	262,348	Form 4

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 13

1,800

Price

$29.83

Value

$54K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 12

2,900

Price

$27.54

Value

$80K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Dec 31

4,300

Price

$21.36

Value

$92K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Dec 30

2,900

Price

$21.73

Value

$63K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Dec 18

4,100

Price

$12.62

Value

$52K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Nov 25

4,600

Price

$8.37

Value

$39K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Nov 7

10,600

Price

$8.43

Value

$89K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Oct 31

2,300

Price

$9.26

Value

$21K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Apr 25

3,600

Price

$9.88

Value

$36K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Apr 17

5,400

Price

$8.98

Value

$48K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Apr 7

3,600

Price

$9.10

Value

$33K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Apr 4

5,500

Price

$8.73

Value

$48K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 10

2,500

Price

$12.51

Value

$31K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 7

1,800

Price

$13.75

Value

$25K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 6

1,100

Price

$13.31

Value

$15K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 3

3,400

Price

$12.95

Value

$44K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Jan 2

2,000

Price

$11.97

Value

$24K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Dec 31

2,400

Price

$11.36

Value

$27K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Dec 30

3,200

Price

$11.12

Value

$36K

View Form 4 on SEC.gov

Thompson Jaye

VP Clinical Reg Affairs

Purchase

Date

Nov 21

1,000

Price

$12.91

Value

$13K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Sep 26

1,500

Price

$14.63

Value

$22K

View Form 4 on SEC.gov

Thompson Jaye

VP Clinical Reg Affairs

Purchase

Date

Aug 12

800

Price

$13.85

Value

$11K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Aug 6

2,000

Price

$13.81

Value

$28K

View Form 4 on SEC.gov

Patel Snehal

CEO and CFO · Director

Purchase

Date

Aug 5

5,500

Price

$13.18

Value

$72K

View Form 4 on SEC.gov

Thompson Jaye

VP Clinical Reg Affairs

Purchase

Date

Aug 2

1,000

Price

$15.15

Value

$15K

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 4

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About GLSI insider trading

GLSI insider trades

Greenwich LifeSciences, Inc. (GLSI) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Patel Snehal (CEO and CFO · Director). Over the past 12 months, 1 insiders have filed transactions with the SEC. GLSI insiders have been primarily buying, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Greenwich LifeSciences, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

GLSI insider trading · 5 questions

The insiders of Greenwich LifeSciences, Inc. (GLSI) include executives and directors such as Patel Snehal (CEO and CFO · Director), among others. Over the past 12 months, 1 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

GLSI board member insider tradingwho are GLSI insidersGLSI insider rosterGreenwich LifeSciences, Inc. executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026