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Allegro MicroSystems (ALGM) Short Interest Ratio & Short Volume

Allegro MicroSystems logo
$39.53 +3.15 (+8.66%)
Closing price 04:00 PM Eastern
Extended Trading
$39.76 +0.23 (+0.57%)
As of 06:01 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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Allegro MicroSystems Short Interest Overview

As of September 15, 2026, Allegro MicroSystems (ALGM) had a short interest of 10.44 million shares sold short, representing 5.63% of the public float. This marks a -18.58% decrease in short interest since the prior report. The short interest ratio (days to cover) is 5.2, meaning it would take 5.2 days of the average trading volume of 2.56 million shares to cover all short positions.

Current Short Interest
10,439,912 shares
Previous Short Interest
12,822,951 shares
Change Vs. Previous Month
-18.58%
Dollar Volume Sold Short
$347.23 million
Short Interest Ratio
5.2 Days to Cover
Last Record Date
September 15, 2026
Outstanding Shares
186,400,000 shares
Short Percent of Float
5.63%
Today's Trading Volume
5,905,319 shares
Average Trading Volume
2,563,382 shares
Today's Volume Vs. Average
230%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

ALGM Short Interest Over Time

ALGM Days to Cover Over Time

ALGM Percentage of Float Shorted Over Time

Allegro MicroSystems 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
9/15/202610,439,912 shares $347.23 million -18.6%5.6%5.18 $33.26
8/31/202612,822,951 shares $464.83 million +29.6%6.9%5.96 $36.25
8/14/20269,893,658 shares $439.18 million -10.6%5.3%5.75 $44.39
7/31/202611,062,440 shares $459.09 million -11.9%6.0%4.42 $41.50
7/15/202612,560,242 shares $628.39 million -18.9%6.8%3.88 $50.03
6/30/202615,481,075 shares $1.08 billion +15.1%8.4%3.21 $69.62
6/15/202613,446,432 shares $739.55 million +12.7%7.2%6.58 $55.00
5/29/202611,930,842 shares $570.82 million +14.2%6.4%5.12 $47.84
5/15/202610,446,907 shares $450.26 million -5.1%5.7%3.45 $43.10
4/30/202611,011,048 shares $534.04 million -11.6%6.0%5.25 $48.50
4/15/202612,448,216 shares $463.70 million +4.5%6.7%7.48 $37.25
3/31/202611,917,864 shares $375.77 million +5.3%6.4%6.49 $31.53
3/13/202611,319,970 shares $352.39 million +10.2%6.1%6.6 $31.13
2/27/202610,272,676 shares $374.64 million -6.4%5.5%3.64 $36.47
2/13/202610,970,784 shares $464.94 million -11.3%5.9%3.97 $42.38
1/30/202612,366,004 shares $456.43 million +12.7%6.7%3.48 $36.91
1/15/202610,971,271 shares $358.65 million +11.2%6.0%4.72 $32.69
12/31/20259,867,730 shares $260.31 million +9.2%5.4%5.63 $26.38
12/15/20259,038,245 shares $241.50 million -11.7%4.9%4.64 $26.72
11/28/202510,236,718 shares $271.28 million +3.4%5.6%7.26 $26.50
11/14/20259,896,480 shares $244.54 million +3.7%5.4%4.99 $24.71
10/31/20259,540,144 shares $285.44 million +11.0%5.2%3.16 $29.92
10/15/20258,590,000 shares $248.08 million -17.6%7.0%5 $28.88
9/30/202510,430,000 shares $304.56 million +2.0%8.5%6 $29.20
9/15/202510,230,000 shares $305.57 million +15.6%8.3%5.5 $29.87
8/31/20258,850,000 shares $273.02 million +12.2%7.2%4.6 $30.85
8/15/20257,890,000 shares $242.22 million -3.1%6.4%4.1 $30.70
7/31/20258,140,000 shares $255.68 million -32.9%6.6%3.7 $31.41
7/15/202512,130,000 shares $442.38 million -6.6%9.9%4.9 $36.47
6/30/202512,980,000 shares $443.79 million +6.6%10.6%4.6 $34.19
6/15/202512,180,000 shares $348.96 million -7.1%9.9%4.2 $28.65
5/31/202513,110,000 shares $330.24 million -13.0%10.7%4.3 $25.19
5/15/202515,070,000 shares $407.19 million -8.6%12.3%4.1 $27.02
4/30/202516,490,000 shares $314.46 million -1.8%13.5%4.5 $19.07
4/15/202516,790,000 shares $333.79 million +16.5%13.7%4.6 $19.88
3/31/202514,410,000 shares $362.12 million -5.8%11.8%4.4 $25.13
3/15/202515,290,000 shares $409.47 million +0.6%12.5%5 $26.78
2/28/202515,200,000 shares $338.96 million +10.4%12.4%5.2 $22.30
2/15/202513,770,000 shares $354.44 million +22.1%11.3%5.7 $25.74
1/31/202511,280,000 shares $271.74 million +4.5%9.3%5.1 $24.09
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1/15/202510,790,000 shares $252.49 million +4.0%8.8%5.2 $23.40
12/31/202410,380,000 shares $226.91 million -9.0%8.5%5.3 $21.86
12/15/202411,400,000 shares $250.80 million -12.0%9.3%5.8 $22.00
11/30/202412,950,000 shares $281.40 million -0.1%10.6%5.7 $21.73
11/15/202412,960,000 shares $247.15 million +5.3%10.6%5.6 $19.07
10/31/202412,310,000 shares $256.54 million +5.3%10.1%5.7 $20.84
10/15/202411,690,000 shares $239.18 million -10.6%9.6%4.5 $20.46
9/30/202413,080,000 shares $304.76 million +27.2%10.7%4.9 $23.30
9/15/202410,280,000 shares $230.68 million +11.7%8.2%4 $22.44
8/31/20249,200,000 shares $225.68 million +3.6%6.9%4.2 $24.53
8/15/20248,880,000 shares $223.07 million +5.7%6.7%4.4 $25.12
7/31/20248,400,000 shares $201.94 million -10.2%6.2%4 $24.04
7/15/20249,350,000 shares $296.58 million -3.1%10.5%6.2 $31.72
6/30/20249,650,000 shares $272.52 million -0.5%10.8%6.8 $28.24
6/15/20249,700,000 shares $271.79 million -0.7%11.1%6.8 $28.02
5/31/20249,770,000 shares $294.47 million +7.1%11.2%6.9 $30.14
5/15/20249,120,000 shares $272.69 million +0.6%10.5%5.9 $29.90
4/30/20249,070,000 shares $269.29 million +4.9%11.5%5.7 $29.69
4/15/20248,650,000 shares $227.15 million +7.6%11.0%4.9 $26.26
3/31/20248,040,000 shares $216.76 million -0.4%10.2%4.6 $26.96
3/15/20248,070,000 shares $221.93 million +2.5%10.3%4.7 $27.50
2/29/20247,870,000 shares $247.83 million +9.6%10.1%4.5 $31.49
2/15/20247,180,000 shares $224.38 million +10.1%9.2%4.5 $31.25
1/31/20246,520,000 shares $169.13 million +12.2%8.3%4.3 $25.94
1/15/20245,810,000 shares $152.34 million +7.8%8.0%4.2 $26.22
12/31/20235,390,000 shares $163.16 million +7.4%7.4%4.1 $30.27
12/15/20235,020,000 shares $156.67 million -5.8%6.9%3.8 $31.21
11/30/20235,330,000 shares $145.08 million -6.2%7.3%4.2 $27.22
11/15/20235,680,000 shares $162.68 million +5.0%7.8%4.3 $28.64
10/31/20235,410,000 shares $140.44 million +8.6%7.4%4.2 $25.96
10/15/20234,980,000 shares $147.01 million +2.9%6.8%3.7 $29.52
9/30/20234,840,000 shares $154.59 million +0.4%6.6%3.3 $31.94
9/15/20234,820,000 shares $158.05 million -19.1%6.6%3.3 $32.79
8/31/20235,960,000 shares $227.97 million +0.9%8.1%4 $38.25
8/15/20235,910,000 shares $229.96 million -16.6%8.4%4 $38.91
7/31/20237,090,000 shares $365.91 million -5.5%10.1%4.5 $51.61
7/15/20237,500,000 shares $374.03 million +8.7%10.7%4.6 $49.87
6/30/20236,900,000 shares $311.47 million -0.7%9.9%4.5 $45.14
6/15/20236,950,000 shares $279.88 million +6.1%10.0%4.6 $40.27
5/31/20236,550,000 shares $257.61 million +12.5%9.5%4.2 $39.33
5/15/20235,820,000 shares $220.75 million +5.8%8.4%3.7 $37.93
4/30/20235,500,000 shares $196.74 million +4.2%7.9%3.6 $35.77
4/15/20235,280,000 shares $237.81 million -7.7%7.6%3.3 $45.04
3/31/20235,720,000 shares $274.50 million -10.1%8.2%3.7 $47.99
3/15/20236,360,000 shares $282.83 million -3.9%9.1%4.3 $44.47
2/28/20236,620,000 shares $289.16 million -6.6%9.5%4.2 $43.68
2/15/20237,090,000 shares $325.57 million -2.3%10.2%4.6 $45.92
1/31/20237,260,000 shares $277.11 million +5.5%10.5%4.9 $38.17
1/15/20236,880,000 shares $232.13 million +7.5%10.7%5.9 $33.74
12/30/20226,400,000 shares $192.13 million +30.6%10.0%6 $30.02
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12/15/20224,900,000 shares $150.04 million +15.8%7.6%4.6 $30.62
11/30/20224,230,000 shares $131.72 million +5.5%6.6%5.2 $31.14
11/15/20224,010,000 shares $117.37 million +35.5%6.2%5.8 $29.27
10/31/20222,960,000 shares $75.21 million +14.3%4.6%5.2 $25.41
10/15/20222,590,000 shares $52.34 million +5.7%4.0%5 $20.21
9/30/20222,450,000 shares $53.53 million +8.4%3.8%4.9 $21.85
9/15/20222,260,000 shares $50.80 million +3.7%3.5%4.8 $22.48
8/31/20222,180,000 shares $50.84 million +5.8%3.4%4.7 $23.32
8/15/20222,060,000 shares $54.55 million -5.9%3.2%3.9 $26.48
7/31/20222,190,000 shares $54.38 million -3.1%3.4%3.6 $24.83
7/15/20222,260,000 shares $47.82 million -1.3%3.6%3.8 $21.16
6/30/20222,290,000 shares $47.38 million -2.1%3.6%3.8 $20.69
6/15/20222,340,000 shares $51.55 million -6.4%3.7%3.8 $22.03
5/31/20222,500,000 shares $64.38 million -1.6%3.9%4.3 $25.75
5/15/20222,540,000 shares $59.99 million -2.7%4.0%4.8 $23.62
4/30/20222,610,000 shares $63.45 million -3.3%4.1%5.5 $24.31
4/15/20222,700,000 shares $64.75 million -5.3%4.2%5 $23.98
3/31/20222,850,000 shares $80.94 million +1.4%4.4%4.9 $28.40
3/15/20222,810,000 shares $72.81 million -4.1%4.4%4.3 $25.91
2/28/20222,930,000 shares $84.00 million -0.3%4.6%4.1 $28.67
2/15/20222,940,000 shares $85.35 million +2.4%4.6%3.9 $29.03
1/31/20222,870,000 shares $81.45 million +1.8%4.5%3.6 $28.38
1/15/20222,820,000 shares $86.74 million -2.1%4.4%3.3 $30.76
12/31/20212,880,000 shares $104.20 million +12.9%4.5%3.6 $36.18
12/15/20212,550,000 shares $88.49 million -4.9%4.0%3.5 $34.70
11/30/20212,680,000 shares $83.70 million +15.0%4.2%3.5 $31.23
11/15/20212,330,000 shares $77.08 million -15.6%3.7%3.2 $33.08
10/29/20212,760,000 shares $92.07 million +6.6%4.4%3.9 $33.36
10/15/20212,590,000 shares $81.20 million +8.8%4.8%4.5 $31.35

ALGM Short Interest - Frequently Asked Questions

Short interest is the volume of Allegro MicroSystems shares that have been sold short but have not yet been closed out or covered. As of September 15th, investors have sold 10,439,912 shares of ALGM short. 5.63% of Allegro MicroSystems' shares are currently sold short. Learn More on Allegro MicroSystems' 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. ALGM shares currently have a short interest ratio of 5.2. Learn More on Allegro MicroSystems'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. 5.63% of Allegro MicroSystems' floating shares are currently sold short.

Allegro MicroSystems saw a decline in short interest in the month of September. As of September 15th, there was short interest totaling 10,439,912 shares, a decline of 18.6% from the previous total of 12,822,951 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.

5.63% of Allegro MicroSystems' shares are currently sold short. Here is how the short interest of companies in the industry of "semiconductors & semiconductor equipment" compare to Allegro MicroSystems: Analog Devices, Inc. (1.79%), Diodes Incorporated (5.27%), KLA Corporation (21.16%), Lam Research Corporation (2.09%), Lattice Semiconductor Corporation (4.46%), Microchip Technology Incorporated (6.11%), MKS Inc. (9.04%), NXP Semiconductors N.V. (2.89%), onsemi (7.62%), Texas Instruments Incorporated (2.18%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($75.21 billion), Invesco QQQ ($46.31 billion), iShares Russell 2000 ETF ($27.98 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($9.70 billion), Canadian Natural Resources Limited ($9.42 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($8.53 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.79 billion), and Financial Select Sector SPDR Fund ($7.74 billion). View all of the most shorted stocks.

Short selling ALGM is an investing strategy that aims to generate trading profit from Allegro MicroSystems as its price is falling. ALGM shares are trading up $3.16 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 Allegro MicroSystems 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 ALGM, 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 ALGM, twice per month. The most recent reporting period available is September, 15 2026.

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

  • 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.


Related Companies
Short Interest Tools

Short interest data for NASDAQ:ALGM is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 9/24/2026. FINRA publishes updated short interest twice a month.
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