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Ultralife (ULBI) Short Interest Ratio & Short Volume

Ultralife logo
$6.31 +0.32 (+5.34%)
As of 02:11 PM Eastern
This is a fair market value price provided by Massive. Learn more.
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Ultralife Short Interest Overview

As of April 30, 2026, Ultralife (ULBI) had a short interest of 79,419 shares sold short, representing 0.79% of the public float. This marks a -0.73% decrease in short interest since the prior report. The short interest ratio (days to cover) is 3.4, meaning it would take 3.4 days of the average trading volume of 46,447 shares to cover all short positions.

Current Short Interest
79,419 shares
Previous Short Interest
80,003 shares
Change Vs. Previous Month
-0.73%
Dollar Volume Sold Short
$547.99 thousand
Short Interest Ratio
3.4 Days to Cover
Last Record Date
April 30, 2026
Outstanding Shares
16,660,000 shares
Short Percent of Float
0.79%
Today's Trading Volume
65,539 shares
Average Trading Volume
46,447 shares
Today's Volume Vs. Average
141%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

ULBI Short Interest Over Time

ULBI Days to Cover Over Time

ULBI Percentage of Float Shorted Over Time

Ultralife 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
4/30/202679,419 shares $547.99 thousand -0.7%0.8%3.44 $6.90
11/14/2025105,584 shares $587.05 thousand -8.4%1.1%2.01 $5.56
10/31/2025115,317 shares $810.68 thousand -15.4%1.2%2.93 $7.03
10/15/2025136,300 shares $962.28 thousand +5.8%1.4%2.4 $7.06
9/30/2025128,800 shares $878.42 thousand -14.6%1.3%2.4 $6.82
9/15/2025150,800 shares $1.03 million -4.9%1.5%1.8 $6.83
8/31/2025158,500 shares $1.10 million -3.2%1.6%1.6 $6.95
8/15/2025163,800 shares $1.07 million -12.4%1.6%1.5 $6.51
7/31/2025187,000 shares $1.49 million -4.4%1.9%1.7 $7.97
7/15/2025195,600 shares $1.67 million -93.4%1.9%1.8 $8.56
6/30/20252,960,000 shares $26.58 million +734.5%29.7%1.2 $8.98
6/15/2025354,700 shares $2.75 million -7.4%3.5%3.9 $7.74
5/31/2025383,000 shares $2.56 million +22.1%3.8%4.9 $6.69
5/15/2025313,600 shares $1.86 million +10.1%3.1%4.7 $5.92
4/30/2025284,900 shares $1.28 million +1.6%2.8%4.6 $4.48
4/15/2025280,400 shares $1.24 million -11.5%2.8%4.7 $4.41
3/31/2025316,900 shares $1.70 million +9.7%3.1%5.6 $5.38
3/15/2025288,800 shares $1.59 million +0.8%2.9%5.6 $5.51
2/28/2025286,400 shares $1.80 million +32.8%2.8%5.6 $6.27
2/15/2025215,600 shares $1.54 million +5.1%2.1%4.2 $7.16
1/31/2025205,200 shares $1.56 million +8.6%2.0%3.4 $7.58
1/15/2025188,900 shares $1.49 million +5.1%1.9%3.2 $7.89
12/31/2024179,700 shares $1.34 million -0.8%1.8%3.1 $7.45
12/15/2024181,100 shares $1.41 million +19.3%1.8%2.8 $7.77
11/30/2024151,800 shares $1.16 million -9.9%1.5%2.4 $7.67
11/15/2024168,400 shares $1.24 million -2.7%1.7%2.6 $7.36
10/31/2024173,100 shares $1.46 million -0.8%1.7%2.9 $8.41
10/15/2024174,400 shares $1.54 million -11.7%1.7%2.8 $8.85
9/30/2024197,500 shares $1.79 million -5.7%2.0%2.9 $9.04
9/15/2024209,500 shares $2.00 million -8.2%2.1%2.4 $9.55
8/31/2024228,100 shares $2.39 million -5.6%2.3%2.5 $10.46
8/15/2024241,700 shares $2.54 million -4.5%2.4%2.5 $10.52
7/31/2024253,200 shares $3.03 million -9.4%2.5%2.4 $11.98
7/15/2024279,600 shares $3.08 million +238.1%2.8%2.3 $11.03
6/30/202482,700 shares $878.27 thousand +37.2%0.8%0.7 $10.62
6/15/202460,300 shares $611.44 thousand +9.0%0.6%0.6 $10.14
5/31/202455,300 shares $643.69 thousand -25.9%0.6%0.6 $11.64
5/15/202474,600 shares $885.50 thousand -7.1%0.8%0.8 $11.87
4/30/202480,300 shares $939.51 thousand +22.8%0.8%0.9 $11.70
4/15/202465,400 shares $562.44 thousand -38.1%0.7%1.1 $8.60
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3/31/2024105,600 shares $930.34 thousand -18.1%1.1%1.7 $8.81
3/15/2024128,900 shares $1.09 million -14.6%1.4%2.2 $8.42
2/29/2024151,000 shares $1.37 million -2.9%1.6%2.6 $9.04
2/15/2024155,500 shares $1.46 million +3.1%1.7%2.7 $9.36
1/31/2024150,900 shares $1.07 million -9.2%1.6%2.7 $7.07
1/15/2024166,200 shares $1.23 million +6.1%1.8%2.2 $7.39
12/31/2023156,700 shares $1.07 million -4.8%N/A0 $6.82
12/15/2023164,600 shares $1.19 million -7.8%1.7%1.6 $7.21
11/30/2023178,600 shares $1.34 million -5.5%1.9%1.6 $7.49
11/15/2023189,000 shares $1.50 million -9.5%2.0%1.5 $7.93
10/31/2023208,900 shares $1.55 million -20.4%2.2%1.5 $7.42
10/15/2023262,300 shares $2.80 million +64.9%2.8%0.9 $10.67
9/30/2023159,100 shares $1.55 million +2.3%1.7%0.6 $9.76
9/15/2023155,500 shares $1.61 million +26.3%1.7%0.6 $10.35
8/31/2023123,100 shares $1.17 million +43.0%1.3%0.5 $9.47
8/15/202386,100 shares $709.46 thousand -67.7%0.9%0.4 $8.24
7/31/2023266,900 shares $2.19 million +481.5%2.9%1.4 $8.19
7/15/202345,900 shares $229.27 thousand +8.5%0.5%2.4 $5.00
6/30/202342,300 shares $204.73 thousand -23.0%0.5%2.3 $4.84
6/15/202354,900 shares $281.64 thousand +160.2%0.6%3 $5.13
5/31/202321,100 shares $88.83 thousand -13.5%0.2%1.3 $4.21
5/15/202324,400 shares $102.48 thousand +43.5%0.3%1.4 $4.20
4/30/202317,000 shares $71.40 thousand -30.3%0.2%1 $4.20
4/15/202324,400 shares $99.80 thousand +35.6%0.3%1.3 $4.09
3/31/202318,000 shares $72.36 thousand -23.4%0.2%0.9 $4.02
3/15/202323,500 shares $95.18 thousand +35.8%0.3%1 $4.05
2/28/202317,300 shares $69.89 thousand -11.3%0.2%0.6 $4.04
2/15/202319,500 shares $78.59 thousand -16.0%0.2%0.6 $4.03
1/31/202323,200 shares $94.42 thousand +16.6%0.2%0.7 $4.07
1/15/202319,900 shares $80.00 thousand -14.6%0.2%0.6 $4.02
12/30/202223,300 shares $89.94 thousand +2.6%0.2%0.7 $3.86
12/15/202222,700 shares $91.71 thousand +5.6%0.2%0.8 $4.04
11/30/202221,500 shares $89.87 thousand -19.2%0.2%0.9 $4.18
11/15/202226,600 shares $124.75 thousand -7.3%0.3%1.3 $4.69
10/31/202228,700 shares $142.07 thousand -53.1%0.3%1.4 $4.95
10/15/202261,200 shares $339.05 thousand +15.0%0.6%2.5 $5.54
9/30/202253,200 shares $255.89 thousand +19.6%0.6%2.2 $4.81
9/15/202244,500 shares $222.06 thousand +25.7%0.5%1.9 $4.99
8/31/202235,400 shares $177 thousand +10.6%0.4%1.5 $5.00
8/15/202232,000 shares $150.08 thousand +6.3%0.3%1.3 $4.69
7/31/202230,100 shares $134.85 thousand -17.8%0.3%1.3 $4.48
7/15/202236,600 shares $157.38 thousand +12.6%0.4%2 $4.30
6/30/202232,500 shares $147.88 thousand -18.8%0.3%1.8 $4.55
6/15/202240,000 shares $194.80 thousand -2.0%0.4%2.2 $4.87
5/31/202240,800 shares $197.06 thousand +4.1%0.4%2.4 $4.83
5/15/202239,200 shares $186.98 thousand -15.7%0.4%2 $4.77
4/30/202246,500 shares $229.71 thousand -3.1%0.5%2 $4.94
4/15/202248,000 shares $230.40 thousand -21.4%0.5%2 $4.80
3/31/202261,100 shares $328.11 thousand -23.1%0.6%2.4 $5.37
3/15/202279,500 shares $436.46 thousand -29.5%0.8%2.5 $5.49
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2/28/2022112,800 shares $605.74 thousand +18.2%1.2%3 $5.37
2/15/202295,400 shares $457.92 thousand -17.3%1.0%2.3 $4.80
1/31/2022115,300 shares $616.86 thousand +25.1%1.2%2.9 $5.35
1/15/202292,200 shares $528.31 thousand -15.4%0.9%2.2 $5.73
12/31/2021109,000 shares $658.36 thousand +46.3%1.1%2.6 $6.04
12/15/202174,500 shares $402.30 thousand +6.3%0.8%1.8 $5.40
11/30/202170,100 shares $375.04 thousand -1.5%0.7%1.7 $5.35
11/15/202171,200 shares $433.61 thousand -27.5%0.7%1.8 $6.09
10/29/202198,200 shares $614.73 thousand +3.8%1.0%2.7 $6.26
10/15/202194,600 shares $671.66 thousand -9.3%1.0%2.4 $7.10
9/30/2021104,300 shares $742.62 thousand -30.4%1.1%2.4 $7.12
9/15/2021149,800 shares $1.12 million +17.9%1.5%2.2 $7.51
8/31/2021127,100 shares $1.04 million -19.2%1.3%1.7 $8.19
8/13/2021157,200 shares $1.31 million +0.5%1.6%1.7 $8.36
7/30/2021156,400 shares $1.24 million +1.1%1.6%0.3 $7.94
7/15/2021154,700 shares $1.31 million -6.6%1.6%0.3 $8.49
6/30/2021165,600 shares $1.39 million -59.2%1.7%0.3 $8.38
6/15/2021406,100 shares $3.65 million -27.6%4.1%0.7 $9.00
5/28/2021560,500 shares $5.12 million +65.1%5.7%0.9 $9.13

ULBI Short Interest - Frequently Asked Questions

Short interest is the volume of Ultralife shares that have been sold short but have not yet been closed out or covered. As of April 30th, investors have sold 79,419 shares of ULBI short. 0.79% of Ultralife's shares are currently sold short. Learn More on Ultralife'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. ULBI shares currently have a short interest ratio of 3.4. Learn More on Ultralife'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. 0.79% of Ultralife's floating shares are currently sold short.

Ultralife saw a decline in short interest during the month of April. As of April 30th, there was short interest totaling 79,419 shares, a decline of 0.7% from the previous total of 80,003 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.

0.79% of Ultralife's shares are currently sold short. Here is how the short interest of companies in the industry of "electrical equipment" compare to Ultralife: SES AI Corporation (5.44%), GrafTech International Ltd. (2.46%), SKYX Platforms Corp. (5.73%), NOVONIX Limited Sponsored ADR (2.53%), NeoVolta, Inc. (8.59%), Byrna Technologies Inc. (15.75%), Stem, Inc. (13.10%), China BAK Battery, Inc. (0.14%), Electra Battery Materials Corporation (1.25%), XCHG Limited (0.03%),

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 ULBI is an investing strategy that aims to generate trading profit from Ultralife as its price is falling. ULBI shares are trading down $0.01 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 Ultralife 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 ULBI, 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 ULBI, 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 ULBI:

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