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Purple Biotech (PPBT) Short Interest Ratio & Short Volume

Purple Biotech logo
$2.70 -0.28 (-9.40%)
Closing price 04:00 PM Eastern
Extended Trading
$2.70 +0.00 (+0.11%)
As of 08:00 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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Purple Biotech Short Interest Overview

As of April 30, 2026, Purple Biotech (PPBT) had a short interest of 10,481 shares sold short, representing 0.84% of the public float. This marks a 31.47% increase in short interest since the prior report. The short interest ratio (days to cover) is 0.8, meaning it would take 0.8 days of the average trading volume of 323,592 shares to cover all short positions.

Current Short Interest
10,481 shares
Previous Short Interest
7,972 shares
Change Vs. Previous Month
31.47%
Dollar Volume Sold Short
$43.29 thousand
Short Interest Ratio
0.8 Days to Cover
Last Record Date
April 30, 2026
Outstanding Shares
1,280,000 shares
Short Percent of Float
0.84%
Today's Trading Volume
110,106 shares
Average Trading Volume
323,592 shares
Today's Volume Vs. Average
34%
Short Selling Purple Biotech?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

PPBT Short Interest Over Time

PPBT Days to Cover Over Time

PPBT Percentage of Float Shorted Over Time

Purple Biotech 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
4/30/202610,481 shares $43.29 thousand +31.5%0.8%0.75 $4.13
4/15/20267,972 shares $32.76 thousand -19.7%0.6%0.66 $4.11
3/31/20269,933 shares $39.59 thousand +20.2%0.8%1.08 $3.99
3/13/20268,262 shares $33.87 thousand -89.7%0.7%0.34 $4.10
2/27/202679,903 shares $353.49 thousand +4.4%6.4%0.65 $4.42
2/13/202676,574 shares $44.34 thousand -38.8%0.6%0.81 $0.58
1/30/2026125,042 shares $75.53 thousand +29.9%1.0%1.08 $0.60
1/15/202696,234 shares $62.55 thousand -39.7%0.8%1.2 $0.65
12/31/2025159,633 shares $104.96 thousand -73.4%1.3%1.05 $0.66
12/15/2025600,079 shares $450.78 thousand +131.1%4.8%0.51 $0.75
11/28/2025259,664 shares $207.73 thousand -42.9%2.1%0.92 $0.80
11/14/2025454,974 shares $326.81 thousand -84.0%3.7%0.63 $0.72
10/31/20252,836,678 shares $2.23 million +4,534.2%22.8%0.08 $0.79
10/15/202561,200 shares $39.30 thousand +8.1%0.7%0.1 $0.64
9/30/202556,600 shares $32.50 thousand -67.7%0.6%0.1 $0.57
9/15/2025175,100 shares $99.00 thousand +84.9%5.8%0.2 $0.57
8/31/202594,700 shares $188.45 thousand -8.2%3.1%0.1 $1.99
8/15/2025103,200 shares $245.00 thousand -34.8%3.4%1.1 $2.37
7/31/2025158,200 shares $341.71 thousand +19.3%5.2%1.6 $2.16
7/15/2025132,600 shares $328.85 thousand -8.3%4.7%0.8 $2.48
6/30/2025144,600 shares $339.81 thousand -1.8%5.1%1.4 $2.35
6/15/2025147,300 shares $358.68 thousand -11.1%5.2%1.4 $2.44
5/31/2025165,700 shares $447.39 thousand -9.6%6.0%1.6 $2.70
5/15/2025183,300 shares $420.67 thousand +179.4%6.6%1.8 $2.30
4/30/202565,600 shares $157.44 thousand +33.3%2.5%0.7 $2.40
4/15/202549,200 shares $123 thousand -13.5%1.9%2.7 $2.50
3/31/202556,900 shares $153.06 thousand +11.4%2.2%2.4 $2.69
3/15/202551,100 shares $138.99 thousand +5.6%1.9%1 $2.72
2/28/202548,400 shares $144.23 thousand -10.4%1.8%0.5 $2.98
2/15/202554,000 shares $167.40 thousand -7.2%2.1%0.1 $3.10
1/31/202558,200 shares $187.99 thousand -42.0%2.2%0.1 $3.23
1/15/2025100,400 shares $365.46 thousand -29.1%3.9%0.1 $3.64
12/31/2024141,600 shares $664.10 thousand +3.4%5.5%0.2 $4.69
12/15/2024136,900 shares $524.33 thousand +94.7%5.4%0.2 $3.83
11/30/202470,300 shares $235.86 thousand +103.2%2.8%0.1 $3.36
11/15/202434,600 shares $86.67 thousand +77.4%1.9%0.8 $2.51
10/31/202419,500 shares $62.60 thousand +8.3%1.1%0.5 $3.21
10/15/202418,000 shares $74.52 thousand +37.4%1.0%0.8 $4.14
9/30/202413,100 shares $72.97 thousand -33.5%0.8%0.6 $5.57
9/15/202419,700 shares $0.00 -95.3%1.2%1 $0.00
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8/31/2024418,800 shares $204.79 thousand +28.5%N/A1.5 $0.49
8/15/2024326,000 shares $120.59 thousand -14.1%N/A1.1 $0.37
7/31/2024379,700 shares $146.46 thousand -6.1%N/A1.3 $0.39
7/15/2024404,500 shares $153.79 thousand -48.9%N/A1.2 $0.38
6/30/2024790,900 shares $321.90 thousand +188.7%N/A2.3 $0.41
6/15/2024274,000 shares $164.67 thousand -11.6%N/A1.5 $0.60
5/31/2024309,900 shares $250.24 thousand +20.3%N/A1.7 $0.81
5/15/2024257,600 shares $128.80 thousand -13.3%N/A1.5 $0.50
4/30/2024297,200 shares $153.86 thousand +27.3%N/A2 $0.52
4/15/2024233,500 shares $132.32 thousand +5.1%N/A2 $0.57
3/31/2024222,200 shares $148.87 thousand -0.4%N/A2.3 $0.67
3/15/2024223,000 shares $161.64 thousand -24.6%N/A2.2 $0.72
2/29/2024295,900 shares $249.86 thousand -6.2%N/A2.9 $0.84
2/15/2024315,400 shares $239.67 thousand -24.6%N/A3.5 $0.76
1/31/2024418,100 shares $275.95 thousand -7.7%N/A5.2 $0.66
1/15/2024452,800 shares $312.43 thousand -4.7%N/A4.6 $0.69
12/31/2023475,100 shares $370.58 thousand -13.5%N/A4.6 $0.78
12/15/2023548,900 shares $521.46 thousand +7.8%N/A5.2 $0.95
11/30/2023509,100 shares $529.46 thousand -8.6%N/A5.6 $1.04
11/15/2023556,700 shares $578.97 thousand -20.5%N/A6.4 $1.04
10/31/2023700,100 shares $945.14 thousand -6.5%N/A8.1 $1.35
10/15/2023748,400 shares $950.47 thousand +15.9%N/A9.5 $1.27
9/30/2023645,900 shares $768.62 thousand -0.1%N/A7.1 $1.19
9/15/2023646,600 shares $724.19 thousand -4.7%N/A7.5 $1.12
8/31/2023678,400 shares $820.86 thousand -0.5%N/A7.7 $1.21
8/15/2023681,600 shares $763.39 thousand -2.5%N/A8 $1.12
7/31/2023698,700 shares $761.58 thousand -11.3%N/A8.5 $1.09
7/15/2023787,900 shares $961.24 thousand +17.2%N/A11.2 $1.22
6/30/2023672,100 shares $937.58 thousand -0.5%N/A11.5 $1.40
6/15/2023675,400 shares $1.08 million -0.3%N/A21.5 $1.60
5/31/2023677,700 shares $1.19 million -0.3%N/A23.6 $1.76
5/15/2023679,900 shares $1.23 million -2.7%N/A22 $1.81
4/30/2023698,800 shares $1.41 million +1.5%N/A19 $2.02
4/15/2023688,600 shares $1.36 million -0.2%N/A16.8 $1.97
3/31/2023690,100 shares $1.24 million -5.7%N/A16.5 $1.79
3/15/2023731,600 shares $1.51 million -0.4%N/A16 $2.07
2/28/2023734,500 shares $1.47 million -3.0%N/A15.7 $2.00
2/15/2023757,400 shares $1.70 million +3.8%N/A16 $2.25
1/31/2023729,800 shares $1.16 million -3.8%N/A16.1 $1.59
1/15/2023758,400 shares $1.21 million -3.9%N/A18.8 $1.59
12/30/2022789,400 shares $1.09 million -5.2%N/A20 $1.38
12/15/2022832,400 shares $1.27 million -3.5%N/A23.6 $1.53
11/30/2022862,200 shares $1.69 million -0.6%N/A21.1 $1.96
11/15/2022867,500 shares $1.87 million -0.5%N/A11 $2.16
10/31/2022871,500 shares $1.86 million -1.0%N/A11.3 $2.13
10/15/2022880,000 shares $1.74 million -0.7%N/A11 $1.98
9/30/2022886,000 shares $1.80 million -4.1%N/A10.7 $2.03
9/15/2022924,100 shares $1.98 million +10.2%N/A10.6 $2.14
8/31/2022838,400 shares $1.97 million -0.6%N/A9.8 $2.35
8/15/2022843,200 shares $2.16 million -3.0%N/A18.6 $2.56
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7/31/2022869,600 shares $2.19 million +1.1%N/A16.8 $2.52
7/15/2022859,800 shares $1.96 million -4.3%N/A16.3 $2.28
6/30/2022898,600 shares $2.15 million -3.2%N/A13.4 $2.39
6/15/2022928,400 shares $2.38 million -4.5%N/A12.8 $2.56
5/31/2022971,700 shares $2.80 million -2.8%N/A11.9 $2.88
5/15/20221,000,000 shares $2.92 million -2.0%5.7%11.4 $2.92
4/30/20221,020,000 shares $3.01 million +2.0%5.9%10.7 $2.95
4/15/20221,000,000 shares $3.12 million +2.2%5.7%9.2 $3.12
3/31/2022978,200 shares $3.84 million +5.3%5.6%8.7 $3.93
3/15/2022928,800 shares $2.50 million -4.5%5.3%8.5 $2.69
2/28/2022972,900 shares $2.84 million -2.7%5.6%9.2 $2.92
2/15/20221,000,000 shares $3.06 million +0.9%5.7%9.4 $3.06
1/31/2022991,500 shares $2.54 million -9.0%5.7%9 $2.56
1/15/20221,090,000 shares $4.43 million +0.9%6.3%10 $4.06
12/31/20211,080,000 shares $4.20 million -1.8%6.2%11.1 $3.89
12/15/20211,100,000 shares $4.55 million +5.8%6.3%11.1 $4.14
11/30/20211,040,000 shares $4.13 million +4.0%6.0%9.9 $3.97
11/15/20211,000,000 shares $4.48 million -3.9%5.7%8.4 $4.48
10/29/20211,040,000 shares $4.46 million -4.6%N/A8.2 $4.29
10/15/20211,090,000 shares $4.98 million -3.5%N/A7 $4.57
9/30/20211,130,000 shares $5.18 million -8.1%N/A6.2 $4.58
9/15/20211,230,000 shares $6.14 million -2.4%N/A6.1 $4.99
8/31/20211,260,000 shares $6.25 million +10.5%N/A5.2 $4.96
8/13/20211,140,000 shares $5.38 million -2.6%N/A2.6 $4.72
7/30/20211,170,000 shares $6.46 million +17.4%N/A2.6 $5.52
7/15/2021996,400 shares $4.80 million +2.5%N/A2.3 $4.82
6/30/2021972,400 shares $4.75 million +4.6%N/A2.1 $4.88
6/15/2021929,500 shares $4.86 million +70.7%N/A1.9 $5.23
5/28/2021544,600 shares $2.97 million +54.2%N/A1.2 $5.46

PPBT Short Interest - Frequently Asked Questions

Short interest is the volume of Purple Biotech shares that have been sold short but have not yet been closed out or covered. As of April 30th, traders have sold 10,481 shares of PPBT short. 0.84% of Purple Biotech's shares are currently sold short. Learn More on Purple Biotech's 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. PPBT shares currently have a short interest ratio of 0.8. Learn More on Purple Biotech'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. 0.84% of Purple Biotech's floating shares are currently sold short.

Purple Biotech saw a increase in short interest in the month of April. As of April 30th, there was short interest totaling 10,481 shares, an increase of 31.5% from the previous total of 7,972 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.

0.84% of Purple Biotech's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Purple Biotech: Pasithea Therapeutics Corp. (1.09%), Lipocine Inc. (2.25%), Cocrystal Pharma, Inc. (5.92%), NLS Pharmaceutics Ltd. (1.24%), Longeveron Inc. (12.63%), Traws Pharma, Inc. (6.41%), Natural Alternatives International, Inc. (0.07%), Passage Bio, Inc. (4.75%), Applied Therapeutics Inc. (0.96%), IN8bio, Inc. (2.92%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($86.09 billion), Invesco QQQ ($39.89 billion), iShares Russell 2000 ETF ($26.13 billion), Western Digital Corporation ($12.66 billion), Salesforce Inc. ($12.29 billion), Sandisk Corporation ($11.87 billion), SPDR S&P Biotech ETF ($9.82 billion), Lumentum Holdings Inc. ($8.51 billion), iShares 20+ Year Treasury Bond ETF ($7.76 billion), and Bloom Energy Corporation ($7.40 billion). View all of the most shorted stocks.

Short selling PPBT is an investing strategy that aims to generate trading profit from Purple Biotech as its price is falling. PPBT shares are trading down $0.28 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 Purple Biotech occurs when it has a large amount of short interest and its stock appreciates in price. This forces short sellers to cover their short interest positions by buying actual shares of PPBT, 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 PPBT, twice per month. The most recent reporting period available is April, 30 2026.

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

  • 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:PPBT) was last updated on 5/21/2026 by MarketBeat.com Staff.
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