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Greenwich LifeSciences, Inc.

$15.45 -$4.02 (-20.65%)
NASDAQ · 11 Sep 2026 20:00 UTC
Previous Close
$15.06
Day Range
$15.19$15.52
Year Range
$7.78$34.1
Market Cap
226.78M
AVG Volume
145.69K
Trailing/Forward PE
-10.03/-
PEG ratio
0.65
Dividend Yield
-
Next Earnings Date
2026-11-13
Primary Exchange
NASDAQUS
Net Income (USD)
-20M-15M-10M-5M02019202020212022202320242025
GLSI Net Income (USD) by year
PeriodNet Income (USD)
2025-18.84M
2024-15.79M
2023-8.89M
2022-7.83M
2021-4.57M
2020-1.86M
2019-3.43M
Operating Income (USD)
-20M-15M-10M-5M02019202020212022202320242025
GLSI Operating Income (USD) by year
PeriodOperating Income (USD)
2025-18.93M
2024-16.01M
2023-9.33M
2022-8.04M
2021-4.6M
2020-1.86M
2019-3.43M
EBITDA (USD)
-20M-15M-10M-5M02019202020212022202320242025
GLSI EBITDA (USD) by year
PeriodEBITDA (USD)
2025-18.84M
2024-15.79M
2023-8.89M
2022-7.82M
2021-4.57M
2020-1.86M
2019-3.42M
Cash Flows (USD)
-10M-7.5M-5M-2.5M02019202020212022202320242025
GLSI Cash Flows (USD) by year
PeriodCash Flows (USD)
2025-9.91M
2024-7.27M
2023-6.48M
2022-6.2M
2021-4.29M
2020-1.15M
2019-293.27K
EPS (USD)
-1.5-1-0.502019202020212022202320242025
GLSI EPS (USD) by year
PeriodEPS (USD)
2025-1.43
2024-1.2
2023-0.69
2022-0.6
2021-0.35
2020-0.19
2019-0.29
Expenses (USD)
-5M05M10M15M20MR&DSG&ACapex2019202020212022202320242025
GLSI Expenses (USD) by year
PeriodExpenses (USD)
202515.16M
202416.01M
20239.33M
20228.04M
20214.6M
20201.86M
20193.43M
Cash & Debt (USD)
010M20M30MCashShort Term Debt2019202020212022202320242025
GLSI Cash & Debt (USD) by year
PeriodCash & Debt (USD)
20256.18M
20244.09M
20236.99M
202213.47M
202127.2M
202028.66M
20196.83K
Debt ratios
00.20.40.60.82022202320242025
GLSI Debt ratios by year
PeriodDebt ratios
20250.12
20240.11
20230.3
20220.76
Return on Capital
-6000%-4000%-2000%0%2000%2019202020212022202320242025
GLSI Return on Capital by year
PeriodReturn on Capital
2025-5335.14%
2024-623.07%
2023-132.71%
2022-59.22%
2021-17.03%
2020-6.74%
2019253.65%
Shares Outstanding
05M10M15M2019202020212022202320242025
GLSI Shares Outstanding by year
PeriodShares Outstanding
202513.64M
202413.15M
202312.85M
202212.65M
202112.9M
20208.79M
201911.97M
Book Value Per Share (USD)
-1012342019202020212022202320242025
GLSI Book Value Per Share (USD) by year
PeriodBook Value Per Share (USD)
20250.03
20240.19
20230.52
20221.04
20212.08
20203.14
2019-0.11
Total Assets (USD)
010M20M30M2019202020212022202320242025
GLSI Total Assets (USD) by year
PeriodTotal Assets (USD)
20256.18M
20244.09M
20236.99M
202213.48M
202127.22M
202028.68M
201926.67K
Employee Count
01234202020212022202320242025
GLSI Employee Count by year
PeriodEmployee Count
20254
20244
20233
20223
20213
20201
Free Cash Flow Yield
-8%-6%-4%-2%med -4.74%Dec 24Apr 25Jul 25Oct 25Feb 26May 26Sep 26
GLSI Free Cash Flow Yield by year
PeriodFree Cash Flow Yield
Sep 26-5.53%
Sep 26-5.35%
Aug 26-5.45%
Aug 26-5.12%
Aug 26-5.08%
Aug 26-6.11%
Jul 26-6.5%
Jul 26-6.76%
Jul 26-5.38%
Jul 26-4.43%
Jul 26-3.99%
Jun 26-4.43%
Jun 26-3.75%
Jun 26-3.65%
Jun 26-3.94%
May 26-2.41%
May 26-2.28%
May 26-2.31%
May 26-2.75%
May 26-2.66%
Apr 26-2.6%
Apr 26-2.27%
Apr 26-2.44%
Apr 26-2.76%
Mar 26-2.82%
Mar 26-2.61%
Mar 26-2.36%
Mar 26-2.73%
Feb 26-2.27%
Feb 26-2.62%
Feb 26-2.35%
Feb 26-2.17%
Jan 26-2.09%
Jan 26-2.47%
Jan 26-2.53%
Jan 26-2.49%
Jan 26-3.23%
Dec 25-3.04%
Dec 25-4.84%
Dec 25-5.87%
Dec 25-7.04%
Nov 25-7.21%
Nov 25-7.73%
Nov 25-7.57%
Nov 25-7.34%
Oct 25-6.91%
Oct 25-6.37%
Oct 25-6.7%
Oct 25-5.97%
Oct 25-5.83%
Sep 25-6.12%
Sep 25-5.55%
Sep 25-5.66%
Sep 25-5.82%
Aug 25-5.54%
Aug 25-4.56%
Aug 25-4.57%
Aug 25-4.56%
Aug 25-5.01%
Jul 25-4.8%
Jul 25-4.79%
Jul 25-5.13%
Jul 25-5.54%
Jun 25-6.18%
Jun 25-6.24%
Jun 25-6.04%
Jun 25-5.75%
May 25-5.64%
May 25-5.66%
May 25-5.67%
May 25-5.86%
May 25-5.53%
Apr 25-5.54%
Apr 25-6.17%
Apr 25-5.84%
Apr 25-6.52%
Mar 25-5.63%
Mar 25-5.18%
Mar 25-4.8%
Mar 25-4.76%
Feb 25-4.71%
Feb 25-4.82%
Feb 25-4.65%
Feb 25-4.64%
Jan 25-4.45%
Jan 25-4.4%
Jan 25-4.47%
Jan 25-4.65%
Jan 25-4.47%
Dec 24-5.01%
Dec 24-4.65%
Dec 24-4.26%
Dec 24-4.22%
Nov 24-4.04%
Nov 24-4.25%
Nov 24-4.59%
Nov 24-3.65%
Nov 24-3.91%
Oct 24-3.89%
Oct 24-3.89%
Price to Book
050100150200med 78.5Dec 24Apr 25Jul 25Oct 25Feb 26May 26Sep 26
GLSI Price to Book by year
PeriodPrice to Book
Sep 2672.47
Sep 2674.82
Aug 2673.51
Aug 2678.2
Aug 2678.81
Aug 2639.69
Jul 2637.31
Jul 2635.87
Jul 2645.1
Jul 2654.72
Jul 2660.8
Jun 2654.72
Jun 2664.62
Jun 2666.49
Jun 2661.49
May 26163.45
May 26172.63
May 26169.88
May 26142.72
May 26147.97
Apr 26151.15
Apr 26173.19
Apr 26160.95
Apr 26142.47
Mar 26139.41
Mar 26150.46
Mar 26166.94
Mar 26144.16
Feb 26173.06
Feb 26150.21
Feb 26167.63
Feb 26181.05
Jan 26187.73
Jan 26159.02
Jan 26155.33
Jan 26157.83
Jan 26121.56
Dec 25129.17
Dec 2581.22
Dec 2566.99
Dec 2555.81
Nov 2554.5
Nov 2550.88
Nov 2551.94
Nov 2580.44
Oct 2585.55
Oct 2592.79
Oct 2588.15
Oct 2598.92
Oct 25101.34
Sep 2596.6
Sep 25106.45
Sep 25104.31
Sep 25101.53
Aug 25106.63
Aug 25122.25
Aug 25122.15
Aug 25122.25
Aug 25111.31
Jul 25116.13
Jul 25116.33
Jul 25108.8
Jul 25100.67
Jun 2590.23
Jun 2589.33
Jun 2592.34
Jun 2596.96
May 2598.86
May 2598.46
May 2550.55
May 2548.95
May 2551.85
Apr 2551.8
Apr 2546.45
Apr 2526.01
Apr 2523.29
Mar 2526.96
Mar 2529.3
Mar 2531.65
Mar 2531.92
Feb 2532.23
Feb 2531.52
Feb 2532.65
Feb 2532.71
Jan 2534.13
Jan 2534.53
Jan 2533.95
Jan 2532.65
Jan 2533.97
Dec 2430.33
Dec 2432.68
Dec 2435.63
Dec 2436.03
Nov 2437.59
Nov 2435.74
Nov 2433.13
Nov 2431.61
Nov 2429.52
Oct 2429.66
Oct 2429.72
Greenwich LifeSciences, Inc.
GLSI
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News: GLSI

20 stocks likely to lose money even if the bull market continues

marketwatch.com · 27 Aug 2026

20 stocks likely to lose money even if the bull market continues

Certain stocks are such poor bets that they are likely to lose ground even in bull markets.

Greenwich LifeSciences Extends Lock-up of Directors and Officers to January 31, 2027

globenewswire.com · 10 Aug 2026

Greenwich LifeSciences Extends Lock-up of Directors and Officers to January 31, 2027

STAFFORD, Texas, Aug. 10, 2026 (GLOBE NEWSWIRE) -- Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating Fast Track designated GLSI-100, an immunotherapy to prevent breast cancer recurrences, today announced that its Board of Directors has extended the lock-up of the shares owned by the Company's directors, officers, and existing pre-IPO investors to January 31, 2027 which is approximately 76 months from the date of the Company's IPO. During this period, current officers, directors and certain shareholders will not be able to sell their shares of the Company's common stock unless otherwise modified by the Board of Directors. After January 31, 2027, the quantity of these locked-up shares that can be sold daily and over various periods of time will be restricted under a leak-out plan unless otherwise modified by the Board of Directors.

Greenwich LifeSciences Announces Approval to Expand FLAMINGO-01 into the United Kingdom

globenewswire.com · 22 Jul 2026

Greenwich LifeSciences Announces Approval to Expand FLAMINGO-01 into the United Kingdom

STAFFORD, Texas, July 22, 2026 (GLOBE NEWSWIRE) -- Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences, today announced the regulatory approval to expand FLAMINGO-01 into the United Kingdom.

Greenwich LifeSciences Provides Clinical Updates on FLAMINGO-01

globenewswire.com · 20 Jul 2026

Greenwich LifeSciences Provides Clinical Updates on FLAMINGO-01

STAFFORD, Texas, July 20, 2026 (GLOBE NEWSWIRE) -- Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences, today provided the following clinical updates on FLAMINGO-01.

Greenwich LifeSciences Announces European Approval for Combining Both HLA Populations in FLAMINGO-01

globenewswire.com · 16 Jul 2026

Greenwich LifeSciences Announces European Approval for Combining Both HLA Populations in FLAMINGO-01

STAFFORD, Texas, July 16, 2026 (GLOBE NEWSWIRE) -- Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences, today provided the following update on the combination of both HLA-A*02 and non-HLA-A*02 patients in FLAMINGO-01 in Europe.

Greenwich LifeSciences The Overlooked Need

seekingalpha.com · 16 Jul 2026

Greenwich LifeSciences The Overlooked Need

Greenwich LifeSciences is a single-asset biotech focused on GLSI-100, an immunotherapy for HER2-positive breast cancer, currently in Phase 3 trials. GLSI-100 demonstrated a 70-80% reduction in cancer recurrence in Phase 2b, outperforming approved therapies, with no serious adverse events reported. GLSI trades at a ~$279M market cap, below recent M&A comps, despite advanced clinical progress and a large addressable market in HER2/neu-positive breast cancer.

Greenwich LifeSciences Announces European Approval for Use of Commercially Manufactured GP2 in FLAMINGO-01

globenewswire.com · 9 Jul 2026

Greenwich LifeSciences Announces European Approval for Use of Commercially Manufactured GP2 in FLAMINGO-01

STAFFORD, Texas, July 09, 2026 (GLOBE NEWSWIRE) -- Greenwich LifeSciences, Inc. (Nasdaq: GLSI) (the "Company"), a clinical-stage biopharmaceutical company focused on its Phase III clinical trial, FLAMINGO-01, which is evaluating GLSI-100, an immunotherapy to prevent breast cancer recurrences, today provided the following update on the use of commercially manufactured GP2 in FLAMINGO-01 in Europe.

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