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Pulse Biosciences (PLSE) Short Interest Ratio & Short Volume

Pulse Biosciences logo
$54.21 +1.10 (+2.07%)
Closing price 04:00 PM Eastern
Extended Trading
$54.97 +0.76 (+1.40%)
As of 07:54 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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Pulse Biosciences Short Interest Overview

As of August 31, 2026, Pulse Biosciences (PLSE) had a short interest of 3.12 million shares sold short, representing 17.34% of the public float. This marks a 12.85% increase in short interest since the prior report. The short interest ratio (days to cover) is 7.9, meaning it would take 7.9 days of the average trading volume of 581,439 shares to cover all short positions.

Current Short Interest
3,121,131 shares
Previous Short Interest
2,765,732 shares
Change Vs. Previous Month
12.85%
Dollar Volume Sold Short
$157.09 million
Short Interest Ratio
7.9 Days to Cover
Last Record Date
August 31, 2026
Outstanding Shares
69,210,000 shares
Short Percent of Float
17.34%
Today's Trading Volume
505,751 shares
Average Trading Volume
581,439 shares
Today's Volume Vs. Average
87%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

PLSE Short Interest Over Time

PLSE Days to Cover Over Time

PLSE Percentage of Float Shorted Over Time

Pulse Biosciences 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
8/31/20263,121,131 shares $157.09 million +12.9%17.3%7.94 $50.33
8/14/20262,765,732 shares $123.19 million -7.3%15.4%6.38 $44.54
7/31/20262,983,029 shares $104.79 million +3.2%16.6%7 $35.13
7/15/20262,889,600 shares $76.05 million +1.2%16.1%11.62 $26.32
6/30/20262,856,310 shares $79.21 million +1.4%15.9%6.59 $27.73
6/15/20262,818,371 shares $73.05 million -8.7%15.7%8.65 $25.92
5/29/20263,086,437 shares $77.16 million -4.1%17.2%10.47 $25.00
5/15/20263,218,960 shares $79.03 million +10.1%17.9%6.94 $24.55
4/30/20262,924,507 shares $61.91 million +0.6%16.9%12.11 $21.17
4/15/20262,908,150 shares $57.15 million -0.3%16.2%11.32 $19.65
3/31/20262,915,409 shares $62.94 million +11.1%16.2%11.83 $21.59
3/13/20262,623,201 shares $56.58 million +3.6%15.2%9.76 $21.57
2/27/20262,532,229 shares $47.43 million +0.0%14.7%6.31 $18.73
2/13/20262,531,449 shares $58.25 million -3.4%14.1%3.47 $23.01
1/30/20262,620,331 shares $36.24 million +1.9%15.2%18.47 $13.83
1/15/20262,571,795 shares $36.26 million -3.6%14.9%13.86 $14.10
12/31/20252,668,535 shares $36.64 million +2.9%15.5%13.67 $13.73
12/15/20252,592,843 shares $36.64 million +5.2%15.1%15.34 $14.13
11/28/20252,464,906 shares $33.79 million +1.8%14.3%12.48 $13.71
11/14/20252,422,500 shares $34.88 million +2.1%14.1%15.7 $14.40
10/31/20252,371,998 shares $40.16 million -3.2%13.8%19.95 $16.93
10/15/20252,450,000 shares $42.36 million -1.6%19.7%13.3 $17.29
9/30/20252,490,000 shares $44.07 million -2.0%20.1%13.5 $17.70
9/15/20252,540,000 shares $39.98 million +1.6%20.5%13.6 $15.74
8/31/20252,500,000 shares $38.85 million -2.0%19.5%14.7 $15.54
8/15/20252,550,000 shares $41.21 million +4.1%20.2%14.9 $16.16
7/31/20252,450,000 shares $36.80 million +0.4%19.4%14.7 $15.02
7/15/20252,440,000 shares $37.14 million -2.4%19.4%14.2 $15.22
6/30/20252,500,000 shares $37.73 million +2.0%19.8%14.3 $15.09
6/15/20252,450,000 shares $38.64 million +2.1%19.4%12.9 $15.77
5/31/20252,400,000 shares $41.90 million -2.4%19.1%13 $17.46
5/15/20252,460,000 shares $40.57 million +3.4%19.6%13.3 $16.49
4/30/20252,380,000 shares $40.51 million +1.3%19.0%12.8 $17.02
4/15/20252,350,000 shares $40.02 million -4.5%18.7%12.6 $17.03
3/31/20252,460,000 shares $39.58 million +6.0%19.6%13.6 $16.09
3/15/20252,320,000 shares $39.23 million +2.7%20.2%14.6 $16.91
2/28/20252,260,000 shares $41.38 million +2.7%19.7%14.1 $18.31
2/15/20252,200,000 shares $46.18 million +3.8%19.2%13.8 $20.99
1/31/20252,120,000 shares $44.37 million -0.5%18.4%12.1 $20.93
1/15/20252,130,000 shares $37.89 million +1.4%18.4%12.7 $17.79
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12/31/20242,100,000 shares $36.56 million -3.2%18.2%12.8 $17.41
12/15/20242,170,000 shares $38.30 million +2.4%18.8%13.3 $17.65
11/30/20242,120,000 shares $45.37 million +1.9%12.4%12.9 $21.40
11/15/20242,080,000 shares $34.61 million -18.1%12.2%12.2 $16.64
10/31/20242,540,000 shares $44.27 million -7.6%14.9%15.9 $17.43
10/15/20242,750,000 shares $45.07 million -0.7%16.2%17.2 $16.39
9/30/20242,770,000 shares $48.59 million +0.7%16.3%14.8 $17.54
9/15/20242,750,000 shares $50.90 million -1.8%16.1%11.8 $18.51
8/31/20242,800,000 shares $52.19 million -4.8%16.5%12.2 $18.64
8/15/20242,940,000 shares $56.12 million +1.0%17.3%11.3 $19.09
7/31/20242,910,000 shares $43.53 million +3.9%23.9%10.8 $14.96
7/15/20242,800,000 shares $54.63 million +12.0%23.0%10.5 $19.51
6/30/20242,500,000 shares $27.98 million +2.9%15.3%9.9 $11.19
6/15/20242,430,000 shares $29.23 million -14.4%14.9%11 $12.03
5/31/20242,840,000 shares $32.80 million -3.1%17.4%13.2 $11.55
5/15/20242,930,000 shares $21.27 million +3.9%17.9%15.8 $7.26
4/30/20242,820,000 shares $20.78 million -3.1%17.4%16.9 $7.37
4/15/20242,910,000 shares $22.76 million +10.7%18.0%17 $7.82
3/31/20242,630,000 shares $22.91 million +5.2%16.2%14.6 $8.71
3/15/20242,500,000 shares $25.78 million -2.7%15.5%13 $10.31
2/29/20242,570,000 shares $25.39 million -1.2%15.9%10.3 $9.88
2/15/20242,600,000 shares $23.92 million -1.1%16.1%9.1 $9.20
1/31/20242,630,000 shares $23.35 million +6.5%16.3%9 $8.88
1/15/20242,470,000 shares $19.83 million +5.1%15.3%8.5 $8.03
12/31/20232,350,000 shares $28.76 million -8.2%14.5%8.7 $12.24
12/15/20232,560,000 shares $25.19 million +7.1%N/A10.2 $9.84
11/30/20232,390,000 shares $21.58 million +2.6%N/A12.2 $9.03
11/15/20232,330,000 shares $14.87 million +8.4%N/A12.8 $6.38
10/31/20232,150,000 shares $9.72 million +3.9%N/A11.5 $4.52
10/15/20232,070,000 shares $8.40 million -2.8%N/A11.2 $4.06
9/30/20232,130,000 shares $8.58 million +4.9%N/A11.6 $4.03
9/15/20232,030,000 shares $9.50 million +8.0%N/A11.5 $4.68
8/31/20231,880,000 shares $8.85 million +9.9%N/A9.2 $4.71
8/15/20231,710,000 shares $13.54 million +0.6%N/A10.8 $7.92
7/31/20231,700,000 shares $13.43 million -5.0%N/A12.3 $7.90
7/15/20231,790,000 shares $12.53 million -4.3%N/A12.7 $7.00
6/30/20231,870,000 shares $13.45 million +17.6%N/A12.3 $7.19
6/15/20231,590,000 shares $10.35 million +3.3%N/A10 $6.51
5/31/20231,540,000 shares $9.55 million -8.3%25.8%13.6 $6.20
5/15/20231,680,000 shares $13.46 million -6.2%28.1%16.3 $8.01
4/30/20231,790,000 shares $11.53 million -5.3%11.4%20.4 $6.44
4/15/20231,890,000 shares $10.92 million -4.1%12.0%27 $5.78
3/31/20231,970,000 shares $6.62 million -5.7%12.5%30.2 $3.36
3/15/20232,090,000 shares $6.60 million +4.5%13.4%38 $3.16
2/28/20232,000,000 shares $5.46 million -5.7%12.8%26.5 $2.73
2/15/20232,120,000 shares $6.21 million -3.2%13.6%26.9 $2.93
1/31/20232,190,000 shares $6.85 million -1.8%14.0%26.2 $3.13
1/15/20232,230,000 shares $8.65 million +4.2%14.3%25.5 $3.88
12/30/20222,140,000 shares $5.93 million -5.3%13.7%23.8 $2.77
12/15/20222,260,000 shares $5.70 million -6.6%14.5%10 $2.52
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11/30/20222,420,000 shares $4.84 million -1.2%15.6%10.5 $2.00
11/15/20222,450,000 shares $5.07 million +7.9%15.8%11.3 $2.07
10/31/20222,270,000 shares $4.79 million +1.3%14.7%10.1 $2.11
10/15/20222,240,000 shares $5.06 million +9.8%14.5%9.8 $2.26
9/30/20222,040,000 shares $4.69 million +6.3%13.2%8.9 $2.30
9/15/20221,920,000 shares $2.86 million +1.1%12.4%10.4 $1.49
8/31/20221,900,000 shares $2.41 million +2.7%12.3%15.8 $1.27
8/15/20221,850,000 shares $3.27 million +1.1%11.9%14.1 $1.77
7/31/20221,830,000 shares $2.85 million -3.7%11.8%11.6 $1.56
7/15/20221,900,000 shares $3.80 million No Change13.3%10.1 $2.00
6/30/20221,900,000 shares $2.91 million -21.2%21.8%7.9 $1.53
6/15/20222,410,000 shares $4.94 million -15.4%34.5%9.5 $2.05
5/31/20222,850,000 shares $6.36 million -0.7%22.0%12.1 $2.23
5/15/20222,870,000 shares $4.88 million +2.9%22.2%11.4 $1.70
4/30/20222,790,000 shares $6.98 million +12.5%21.8%10.9 $2.50
4/15/20222,480,000 shares $8.61 million -4.3%19.3%9.7 $3.47
3/31/20222,590,000 shares $12.59 million +2.0%20.3%13.6 $4.86
3/15/20222,540,000 shares $11.84 million +7.2%19.9%15.4 $4.66
2/28/20222,370,000 shares $12.04 million +13.4%18.6%15.5 $5.08
2/15/20222,090,000 shares $13.73 million +13.0%16.4%15.2 $6.57
1/31/20221,850,000 shares $22.50 million +7.6%14.5%17.2 $12.16
1/15/20221,720,000 shares $21.38 million +4.9%13.5%24.4 $12.43
12/31/20211,640,000 shares $24.29 million +4.5%12.9%30.3 $14.81
12/15/20211,570,000 shares $26.71 million +6.1%12.3%31.6 $17.01
11/30/20211,480,000 shares $30.04 million +1.4%11.6%30.2 $20.30
11/15/20211,460,000 shares $31.65 million No Change11.5%31.1 $21.68
10/29/20211,460,000 shares $30.79 million +1.4%11.5%28.1 $21.09
10/15/20211,440,000 shares $31.18 million -2.0%11.3%25.6 $21.65
9/30/20211,470,000 shares $31.75 million -6.4%11.5%23.3 $21.60
9/15/20211,570,000 shares $32.26 million -1.9%12.3%14.2 $20.55

PLSE Short Interest - Frequently Asked Questions

Short interest is the volume of Pulse Biosciences shares that have been sold short but have not yet been covered or closed out. As of August 31st, traders have sold 3,121,131 shares of PLSE short. 17.34% of Pulse Biosciences' shares are currently sold short. Learn More on Pulse Biosciences' 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. PLSE shares currently have a short interest ratio of 7.9. Learn More on Pulse Biosciences'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. 17.34% of Pulse Biosciences' floating shares are currently sold short.

Pulse Biosciences saw a increase in short interest in the month of August. As of August 31st, there was short interest totaling 3,121,131 shares, an increase of 12.9% from the previous total of 2,765,732 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.

17.34% of Pulse Biosciences' shares are currently sold short. Here is how the short interest of companies in the industry of "healthcare equipment" compare to Pulse Biosciences: Baxter International Inc. (4.51%), Penumbra, Inc. (4.53%), Smith & Nephew SNATS, Inc. (1.50%), Globus Medical, Inc. (6.04%), Glaukos Corporation (6.89%), Insulet Corporation (6.44%), Teleflex Incorporated (9.56%), MiniMed Group Inc (2.87%), Haemonetics Corporation (6.43%), LivaNova PLC (9.09%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($62.68 billion), Invesco QQQ ($47.06 billion), iShares Russell 2000 ETF ($23.54 billion), SPDR S&P Biotech ETF ($12.10 billion), Nebius Group N.V. ($9.34 billion), Western Digital Corporation ($8.96 billion), Financial Select Sector SPDR Fund ($8.16 billion), iShares 20+ Year Treasury Bond ETF ($7.98 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($7.52 billion), and VanEck Semiconductor ETF ($7.39 billion). View all of the most shorted stocks.

Short selling PLSE is an investing strategy that aims to generate trading profit from Pulse Biosciences as its price is falling. PLSE shares are trading up $1.10 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 Pulse Biosciences 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 PLSE, 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 PLSE, twice per month. The most recent reporting period available is August, 31 2026.

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

  • 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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Short Interest Tools

Short interest data for NASDAQ:PLSE is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 9/10/2026. FINRA publishes updated short interest twice a month.
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