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Greenwich LifeSciences (GLSI) Short Interest Ratio & Short Volume

Greenwich LifeSciences logo
$23.03 -0.72 (-3.03%)
Closing price 04:00 PM Eastern
Extended Trading
$22.98 -0.05 (-0.22%)
As of 07:42 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Greenwich LifeSciences Short Interest Overview

As of May 29, 2026, Greenwich LifeSciences (GLSI) had a short interest of 1.52 million shares sold short, representing 21.31% of the public float. This marks a -1.53% decrease in short interest since the prior report. The short interest ratio (days to cover) is 13.4, meaning it would take 13.4 days of the average trading volume of 141,496 shares to cover all short positions.

Current Short Interest
1,518,228 shares
Previous Short Interest
1,541,786 shares
Change Vs. Previous Month
-1.53%
Dollar Volume Sold Short
$39.73 million
Short Interest Ratio
13.4 Days to Cover
Last Record Date
May 29, 2026
Outstanding Shares
14,680,000 shares
Short Percent of Float
21.31%
Today's Trading Volume
71,992 shares
Average Trading Volume
141,496 shares
Today's Volume Vs. Average
51%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

GLSI Short Interest Over Time

GLSI Days to Cover Over Time

GLSI Percentage of Float Shorted Over Time

Greenwich LifeSciences Tesla Short Interest History & Recent Changes

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Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
5/29/20261,518,228 shares $39.73 million -1.5%21.3%13.37 $26.17
5/15/20261,541,786 shares $41.95 million -0.2%22.9%11.02 $27.21
4/30/20261,544,439 shares $36.48 million +1.4%23.0%10.97 $23.62
4/15/20261,522,683 shares $39.45 million +1.3%21.4%13.05 $25.91
3/31/20261,503,361 shares $36.11 million +5.9%22.4%7.46 $24.02
3/13/20261,419,597 shares $37.96 million +6.1%21.1%9.03 $26.74
2/27/20261,337,470 shares $37.07 million +4.5%19.9%10.11 $27.72
2/13/20261,280,298 shares $34.38 million -2.9%18.0%5.81 $26.85
1/30/20261,318,481 shares $39.65 million -14.7%19.6%1.32 $30.07
1/15/20261,546,371 shares $42.05 million -7.4%23.0%3.41 $27.19
12/31/20251,669,533 shares $35.08 million +3.1%24.8%1.83 $21.01
12/15/20251,619,259 shares $16.69 million +0.6%24.1%3.68 $10.31
11/28/20251,610,157 shares $14.26 million +1.7%23.9%27.34 $8.86
11/14/20251,582,602 shares $13.17 million +17.6%23.5%14.03 $8.32
10/31/20251,346,362 shares $12.40 million +0.3%20.0%19.89 $9.21
10/15/20251,340,000 shares $13.84 million -2.2%21.9%20.8 $10.33
9/30/20251,370,000 shares $13.63 million +11.4%22.4%19.4 $9.95
9/15/20251,230,000 shares $14.37 million +15.0%20.1%18.4 $11.68
8/31/20251,070,000 shares $12.28 million +0.9%17.5%18.2 $11.48
8/15/20251,060,000 shares $12.90 million +1.9%17.4%19.7 $12.17
7/31/20251,040,000 shares $11.38 million +4.0%17.4%20 $10.94
7/15/20251,000,000 shares $10.08 million -2.9%16.7%17.5 $10.08
6/30/20251,030,000 shares $9.34 million +6.3%17.2%16.1 $9.07
6/15/2025968,600 shares $8.91 million +0.9%16.2%12.5 $9.20
5/31/2025959,900 shares $9.42 million -5.0%16.0%12.6 $9.81
5/15/20251,010,000 shares $9.79 million +1.2%16.9%13.7 $9.69
4/30/2025998,000 shares $10.08 million +9.6%16.8%14.1 $10.10
4/15/2025910,700 shares $8.15 million +22.5%15.3%13.1 $8.95
3/31/2025743,300 shares $7.09 million +12.9%12.6%12.4 $9.54
3/15/2025658,400 shares $7.90 million +2.3%11.1%19.8 $12.00
2/28/2025643,500 shares $7.86 million -1.5%10.9%21 $12.22
2/15/2025653,100 shares $8.09 million +1.4%11.1%20 $12.38
1/31/2025644,000 shares $8.33 million +5.1%10.9%19.1 $12.94
1/15/2025612,700 shares $7.64 million +10.1%10.4%17.8 $12.47
12/31/2024556,700 shares $6.25 million +5.0%9.4%18.3 $11.23
12/15/2024530,200 shares $7.16 million +8.1%9.0%18.8 $13.51
11/30/2024490,400 shares $6.99 million +4.2%8.3%16.8 $14.25
11/15/2024470,700 shares $5.91 million -2.9%8.0%15.4 $12.56
10/31/2024484,600 shares $6.52 million -3.3%8.2%16.3 $13.45
10/15/2024501,200 shares $7.10 million +1.1%8.5%16.3 $14.16
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9/30/2024495,700 shares $7.12 million -1.9%8.4%14.8 $14.37
9/15/2024505,200 shares $7.54 million +8.3%8.5%10.9 $14.93
8/31/2024466,600 shares $6.54 million +3.3%7.9%9.8 $14.02
8/15/2024451,700 shares $6.13 million +8.7%7.8%10 $13.58
7/31/2024415,600 shares $6.70 million +12.1%7.3%9.2 $16.12
7/15/2024370,600 shares $5.80 million +42.4%6.5%8.2 $15.66
6/30/2024260,200 shares $4.49 million +13.4%4.6%5.7 $17.26
6/15/2024229,400 shares $3.39 million +17.6%4.1%6.8 $14.76
5/31/2024195,100 shares $2.89 million +10.2%3.3%5.2 $14.83
5/15/2024177,100 shares $2.61 million -6.4%3.0%4.1 $14.75
4/30/2024189,100 shares $2.35 million +2.2%3.2%3.6 $12.42
4/15/2024185,100 shares $2.64 million +31.7%3.2%3.6 $14.26
3/31/2024140,500 shares $2.80 million +2.5%2.4%2.9 $19.94
3/15/2024137,100 shares $2.40 million +13.0%2.4%3 $17.50
2/29/2024121,300 shares $1.48 million -30.1%2.1%3.2 $12.16
2/15/2024173,600 shares $2.01 million +12.4%3.0%5.5 $11.60
1/31/2024154,500 shares $1.33 million -4.2%2.6%8.1 $8.64
1/15/2024161,200 shares $1.49 million +5.8%2.8%9.2 $9.26
12/31/2023152,300 shares $1.60 million +32.8%2.6%9.5 $10.52
12/15/2023114,700 shares $1.23 million -31.3%2.0%7.9 $10.76
11/30/2023167,000 shares $1.95 million +0.1%2.9%11.6 $11.70
11/15/2023166,800 shares $1.83 million +2.0%2.9%12.4 $10.98
10/31/2023163,500 shares $1.37 million -11.3%2.8%12.7 $8.36
10/15/2023184,300 shares $1.59 million -5.5%3.1%13.8 $8.64
9/30/2023195,100 shares $1.72 million +0.1%3.3%14.2 $8.84
9/15/2023194,900 shares $1.76 million +7.9%3.3%12.8 $9.04
8/31/2023180,700 shares $1.66 million -3.4%3.1%10.2 $9.17
8/15/2023187,000 shares $1.99 million +5.2%3.2%9.4 $10.66
7/31/2023177,800 shares $1.64 million -4.6%3.0%8.6 $9.20
7/15/2023186,300 shares $1.74 million -4.7%3.2%7.8 $9.34
6/30/2023195,500 shares $1.89 million -12.7%3.3%5.2 $9.65
6/15/2023224,000 shares $2.47 million -1.0%3.8%5.5 $11.04
5/31/2023226,200 shares $2.46 million -6.5%6.3%5.5 $10.89
5/15/2023242,000 shares $2.72 million -21.7%6.8%5.6 $11.25
4/30/2023308,900 shares $3.31 million -9.2%8.6%6.7 $10.71
4/15/2023340,000 shares $4.02 million +23.3%9.5%6.9 $11.81
3/31/2023275,700 shares $3.80 million +43.2%7.7%6.3 $13.79
3/15/2023192,500 shares $2.49 million +9.9%5.4%4.7 $12.92
2/28/2023175,100 shares $2.73 million -1.1%4.9%4.4 $15.61
2/15/2023177,100 shares $2.98 million -2.2%4.9%4.1 $16.85
1/31/2023181,100 shares $3.59 million -9.8%5.0%4 $19.84
1/15/2023200,800 shares $3.27 million -10.6%5.6%4.5 $16.26
12/30/2022224,600 shares $3.41 million +15.6%6.2%5.3 $15.20
12/15/2022194,300 shares $2.52 million -17.8%5.4%5 $12.97
11/30/2022236,400 shares $3.30 million +0.2%6.6%5.5 $13.95
11/15/2022235,900 shares $2.61 million +26.5%6.6%5.8 $11.08
10/31/2022186,500 shares $1.68 million -21.6%5.2%4.4 $9.01
10/15/2022238,000 shares $2.35 million -10.6%6.6%4.9 $9.86
9/30/2022266,200 shares $2.42 million +3.5%24.0%1.2 $9.10
9/15/2022257,100 shares $2.66 million +10.6%23.2%1.1 $10.35
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8/31/2022232,400 shares $2.20 million +19.5%18.3%0.9 $9.48
8/15/2022194,500 shares $2.02 million -34.6%15.1%0.6 $10.39
7/31/2022297,200 shares $2.40 million -29.0%23.0%1 $8.09
7/15/2022418,400 shares $3.87 million +59.8%32.4%1.3 $9.24
6/30/2022261,800 shares $2.22 million -28.7%20.3%1.8 $8.47
6/15/2022367,000 shares $2.98 million +5.6%10.1%2.8 $8.12
5/31/2022347,500 shares $2.69 million +12.7%11.3%3.2 $7.74
5/15/2022308,400 shares $2.99 million +3.4%10.1%4.4 $9.69
4/30/2022298,300 shares $3.53 million +8.9%9.7%4.4 $11.85
4/15/2022273,900 shares $4.70 million -14.3%3.1%4 $17.16
3/31/2022319,500 shares $6.27 million +59.8%3.6%4.9 $19.62
3/15/2022200,000 shares $4.27 million +7.2%2.2%2.6 $21.33
2/28/2022186,500 shares $3.63 million +1.3%2.0%2.5 $19.49
2/15/2022184,200 shares $3.55 million +25.7%2.0%2.6 $19.26
1/31/2022146,500 shares $2.71 million +67.2%1.6%2.5 $18.47
1/15/202287,600 shares $1.77 million -18.4%N/A1.7 $20.24
12/31/2021107,300 shares $2.61 million -2.7%1.2%2.4 $24.33
12/15/2021110,300 shares $2.91 million +3.6%1.1%2.8 $26.36
11/30/2021106,500 shares $3.35 million +24.9%3.9%3.2 $31.43
11/15/202185,300 shares $2.99 million -21.2%3.1%2.3 $35.11
10/29/2021108,300 shares $3.83 million -7.1%4.0%3 $35.36
10/15/2021116,600 shares $4.43 million -49.4%4.4%3 $37.96
9/30/2021230,300 shares $9.00 million +72.3%9.2%5.4 $39.07
9/15/2021133,700 shares $5.59 million -11.0%5.3%2 $41.82
8/31/2021150,300 shares $6.02 million -18.1%6.0%1.9 $40.02
8/13/2021183,500 shares $7.43 million -10.5%7.5%1.8 $40.50
7/30/2021205,100 shares $8.10 million +3.1%8.4%1.9 $39.47
7/15/2021199,000 shares $8.34 million +2.4%8.2%1.6 $41.92
6/30/2021194,400 shares $8.74 million +63.5%8.0%1 $44.94

GLSI Short Interest - Frequently Asked Questions

Short interest is the volume of Greenwich LifeSciences shares that have been sold short but have not yet been covered or closed out. As of May 29th, traders have sold 1,518,228 shares of GLSI short. 21.31% of Greenwich LifeSciences' shares are currently sold short. Learn More on Greenwich LifeSciences' current short interest.

The short interest ratio, also known as the "days to cover ratio", is calculated by dividing the number of shares of a stock sold short divided by its average trading volume. A short interest ratio ranging between 1 and 4 generally indicates strong positive sentiment about a stock and a lack of short sellers. A short interest ratio of 10 or greater indicates strong pessimism about a stock. GLSI shares currently have a short interest ratio of 13.4. Learn More on Greenwich LifeSciences's short interest ratio.

Companies that have a short interest as a percentage of float below 10% indicates positive investor sentiment and few short sellers. Stocks with a short interest percentage above 10% is considered high, suggesting some investors are pessimistic about the stock. Companies with a short interest percentage of 20% or more indicates widespread negative sentiment. 21.31% of Greenwich LifeSciences' floating shares are currently sold short.

Greenwich LifeSciences saw a drop in short interest during the month of May. As of May 29th, there was short interest totaling 1,518,228 shares, a drop of 1.5% from the previous total of 1,541,786 shares. Changes in short volume can be used to identify positive and negative investor sentiment. Investors that short sell a stock are betting that its price will decline in the future. An increase in short sale volume suggests bearish (negative) sentiment among investors. A decrease on short sale volume suggests bullish (positive) sentiment.

21.31% of Greenwich LifeSciences' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Greenwich LifeSciences: Harrow, Inc. (20.58%), Immunocore Holdings PLC Sponsored ADR (19.20%), Bicara Therapeutics Inc. (17.80%), ArriVent BioPharma, Inc. (18.11%), Ardelyx, Inc. (10.59%), Inhibrx Biosciences, Inc. (26.51%), MoonLake Immunotherapeutics (8.60%), GH Research PLC (3.21%), Maravai LifeSciences Holdings, Inc. (3.13%), Maze Therapeutics, Inc. (7.44%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($81.27 billion), Invesco QQQ ($49.06 billion), iShares Russell 2000 ETF ($23.61 billion), Western Digital Corporation ($16.93 billion), Sandisk Corporation ($15.61 billion), Salesforce Inc. ($11.65 billion), SPDR S&P Biotech ETF ($10.52 billion), Nebius Group N.V. ($10.24 billion), Lumentum Holdings Inc. ($8.74 billion), and iShares iBoxx $ High Yield Corporate Bond ETF ($8.21 billion). View all of the most shorted stocks.

Short selling GLSI is an investing strategy that aims to generate trading profit from Greenwich LifeSciences as its price is falling. GLSI shares are trading down $0.72 today. To short a stock, an investor borrows shares, sells them and buys the shares back on the public market later to return it to the lender. Short sellers are betting that a stock will decline in price. If the stock does drop after selling, the short seller buys it back at a lower price and returns it to the lender. The difference between the sell price and the buy price is the trader's profit.

A short squeeze for Greenwich LifeSciences occurs when it has a large amount of short interest and its stock increases in price. This forces short sellers to cover their short interest positions by buying actual shares of GLSI, which in turn drives the price of the stock up even further.

Short interest is typically published by a stock exchange once per month. However, NASDAQ publishes a report for U.S. stocks, including GLSI, twice per month. The most recent reporting period available is May, 29 2026.

Understanding short interest metrics can help you assess how traders are positioning around a stock like GLSI:

  • Shares Sold Short: The total number of shares that have been sold by short sellers but have not yet been covered or closed out. A high number may indicate bearish sentiment.
  • Short Float: The percentage of a company’s publicly available shares (or "float") that are sold short. A higher short float suggests a greater portion of the stock is being bet against.
  • Days to Cover (Short Interest Ratio): This estimates how many days it would take short sellers to cover their positions, based on average daily trading volume. Higher values can signal potential for a short squeeze if buying pressure increases.

These metrics are often used by traders to gauge sentiment, volatility risk, and the potential for price movements based on short covering activity.


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This page (NASDAQ:GLSI) was last updated on 6/9/2026 by MarketBeat.com Staff.
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