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Iridium Communications (IRDM) Short Interest Ratio & Short Volume

Iridium Communications logo
$46.60 -1.04 (-2.18%)
As of 08/28/2026 04:00 PM Eastern
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Iridium Communications Short Interest Overview

As of August 14, 2026, Iridium Communications (IRDM) had a short interest of 2.87 million shares sold short, representing 2.79% of the public float. This marks a -16.93% decrease in short interest since the prior report. The short interest ratio (days to cover) is 2.8, meaning it would take 2.8 days of the average trading volume of 977,189 shares to cover all short positions.

Current Short Interest
2,872,219 shares
Previous Short Interest
3,457,705 shares
Change Vs. Previous Month
-16.93%
Dollar Volume Sold Short
$144.19 million
Short Interest Ratio
2.8 Days to Cover
Last Record Date
August 14, 2026
Outstanding Shares
105,980,000 shares
Short Percent of Float
2.79%
Today's Trading Volume
1,507,502 shares
Average Trading Volume
977,189 shares
Today's Volume Vs. Average
154%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

IRDM Short Interest Over Time

IRDM Days to Cover Over Time

IRDM Percentage of Float Shorted Over Time

Iridium Communications 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
8/14/20262,872,219 shares $144.19 million -16.9%2.8%2.83 $50.20
7/31/20263,457,705 shares $163.69 million +22.4%3.4%2.21 $47.34
7/15/20262,826,191 shares $137.55 million -35.3%2.7%1.27 $48.67
6/30/20264,367,799 shares $239.57 million -54.0%4.2%1.04 $54.85
6/15/20269,488,045 shares $430.66 million +67.9%9.2%3.4 $45.39
5/29/20265,651,026 shares $292.62 million -0.3%5.5%2.48 $51.78
5/15/20265,669,943 shares $235.98 million +4.6%5.5%2.94 $41.62
4/30/20265,421,453 shares $211.82 million -0.3%5.3%1.74 $39.07
4/15/20265,435,337 shares $206.49 million -0.4%5.3%2.19 $37.99
3/31/20265,456,818 shares $151.37 million -24.3%5.3%2.53 $27.74
3/13/20267,208,131 shares $179.19 million +2.9%7.0%3.86 $24.86
2/27/20267,003,160 shares $167.73 million -20.6%6.8%4.26 $23.95
2/13/20268,818,552 shares $204.33 million -3.5%8.6%3.1 $23.17
1/30/20269,140,427 shares $182.08 million -10.0%8.9%3.43 $19.92
1/15/202610,160,860 shares $195.80 million -0.1%9.9%5.7 $19.27
12/31/202510,170,431 shares $176.76 million +9.9%9.9%3.21 $17.38
12/15/20259,257,674 shares $162.94 million +12.0%9.1%3.72 $17.60
11/28/20258,269,749 shares $136.45 million -12.2%8.1%5.76 $16.50
11/14/20259,417,379 shares $155.76 million -0.8%9.2%4.41 $16.54
10/31/20259,489,072 shares $181.81 million -3.5%9.3%2.7 $19.16
10/15/20259,830,000 shares $189.03 million -4.9%10.6%3.6 $19.23
9/30/202510,340,000 shares $180.54 million -19.1%11.2%4 $17.46
9/15/202512,780,000 shares $232.34 million +47.4%13.8%5.4 $18.18
8/31/20258,670,000 shares $215.80 million -1.3%9.4%4.4 $24.89
8/15/20258,780,000 shares $219.59 million +9.2%9.5%5.7 $25.01
7/31/20258,040,000 shares $196.66 million +6.6%8.7%5.5 $24.46
7/15/20257,540,000 shares $237.06 million -1.2%8.0%5.1 $31.44
6/30/20257,630,000 shares $230.20 million -34.8%8.1%5.9 $30.17
6/15/202511,710,000 shares $335.37 million +54.3%12.4%9.1 $28.64
5/31/20257,590,000 shares $192.33 million -1.9%8.1%5.5 $25.34
5/15/20257,740,000 shares $198.53 million +0.4%8.2%5.6 $25.65
4/30/20257,710,000 shares $186.04 million -12.6%8.2%5.2 $24.13
4/15/20258,820,000 shares $213.44 million -5.6%9.4%6 $24.20
3/31/20259,340,000 shares $255.17 million -25.3%9.9%7.2 $27.32
3/15/202512,510,000 shares $345.15 million +22.2%13.2%10.3 $27.59
2/28/202510,240,000 shares $323.17 million +7.8%10.7%9.1 $31.56
2/15/20259,500,000 shares $300.49 million +12.7%9.9%8.7 $31.63
1/31/20258,430,000 shares $242.36 million +2.4%8.5%8.6 $28.75
1/15/20258,230,000 shares $226.49 million +3.0%8.2%8.5 $27.52
12/31/20247,990,000 shares $231.87 million -7.5%8.0%7.8 $29.02
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12/15/20248,640,000 shares $261.01 million +12.2%8.6%7.9 $30.21
11/30/20247,700,000 shares $228.84 million -1.3%7.7%6.8 $29.72
11/15/20247,800,000 shares $220.82 million +10.6%7.8%6.7 $28.31
10/31/20247,050,000 shares $206.78 million +6.3%7.0%6.5 $29.33
10/15/20246,630,000 shares $199.36 million +6.8%6.6%6 $30.07
9/30/20246,210,000 shares $189.09 million -3.6%5.9%6 $30.45
9/15/20246,440,000 shares $173.69 million +26.3%6.2%6.1 $26.97
8/31/20245,100,000 shares $131.58 million +12.3%4.9%5 $25.80
8/15/20244,540,000 shares $125.58 million -1.7%4.3%4.6 $27.66
7/31/20244,620,000 shares $132.59 million +1.1%4.4%4.8 $28.70
7/15/20244,570,000 shares $117.86 million +0.7%4.2%4.4 $25.79
6/30/20244,540,000 shares $120.85 million -7.9%4.2%4.2 $26.62
6/15/20244,930,000 shares $130.40 million -6.3%4.6%4.5 $26.45
5/31/20245,260,000 shares $158.38 million -2.1%4.9%4.7 $30.11
5/15/20245,370,000 shares $163.46 million +8.9%5.0%4.6 $30.44
4/30/20244,930,000 shares $151.79 million +26.4%4.6%3.7 $30.79
4/15/20243,900,000 shares $96.14 million +8.6%3.6%3.1 $24.65
3/31/20243,590,000 shares $93.91 million +5.6%3.3%3.2 $26.16
3/15/20243,400,000 shares $91.80 million +27.3%3.1%3.3 $27.00
2/29/20242,670,000 shares $77.30 million +0.8%2.4%2.8 $28.95
2/15/20242,650,000 shares $80.75 million -1.5%2.4%3.1 $30.47
1/31/20242,690,000 shares $97.54 million +0.8%2.4%3.7 $36.26
1/15/20242,670,000 shares $102.37 million +17.6%2.4%3.8 $38.34
12/31/20232,270,000 shares $93.43 million -11.0%2.1%3.1 $41.16
12/15/20232,550,000 shares $102.03 million -1.2%2.3%3.4 $40.01
11/30/20232,580,000 shares $98.30 million No Change2.3%3.3 $38.10
11/15/20232,580,000 shares $96.65 million -0.8%2.3%3.6 $37.46
10/31/20232,600,000 shares $96.33 million +11.6%2.4%3.7 $37.05
10/15/20232,330,000 shares $98.98 million +4.0%2.1%2.7 $42.48
9/30/20232,240,000 shares $101.90 million -11.5%2.0%2.8 $45.49
9/15/20232,530,000 shares $120.30 million No Change2.3%3.2 $47.55
8/31/20232,530,000 shares $123.84 million -7.0%2.3%2.5 $48.95
8/15/20232,720,000 shares $136.76 million -5.9%2.4%2.7 $50.28
7/31/20232,890,000 shares $151.87 million +18.0%2.6%2.9 $52.55
7/15/20232,450,000 shares $147.78 million -2.0%2.2%2.6 $60.32
6/30/20232,500,000 shares $155.30 million -44.0%2.2%2.8 $62.12
6/15/20234,460,000 shares $272.24 million +8.8%4.0%5.1 $61.04
5/31/20234,100,000 shares $246.16 million +0.7%3.6%6 $60.04
5/15/20234,070,000 shares $251.28 million No Change3.6%5.9 $61.74
10/31/20225,960,000 shares $307.12 million -4.3%5.3%10 $51.53
10/15/20226,230,000 shares $290.57 million +4.0%5.6%10.7 $46.64
9/30/20225,990,000 shares $265.78 million -7.9%5.3%11 $44.37
9/15/20226,500,000 shares $289.90 million +6.6%5.7%12.1 $44.60
8/31/20226,100,000 shares $270.78 million -6.9%5.4%11.4 $44.39
8/15/20226,550,000 shares $305.69 million -1.4%5.8%14 $46.67
7/31/20226,640,000 shares $296.87 million +7.3%5.9%13.6 $44.71
7/15/20226,190,000 shares $243.14 million -1.8%5.4%12.6 $39.28
6/30/20226,300,000 shares $236.63 million -5.4%5.5%12.2 $37.56
6/15/20226,660,000 shares $241.76 million -0.3%5.8%12.6 $36.30
5/31/20226,680,000 shares $247.89 million +2.8%5.8%12.6 $37.11
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5/15/20226,500,000 shares $224.84 million +0.3%5.7%10 $34.59
4/30/20226,480,000 shares $231.40 million +5.0%5.7%7.5 $35.71
4/15/20226,170,000 shares $249.95 million -3.9%5.4%5.8 $40.51
3/31/20226,420,000 shares $258.85 million +0.2%N/A0 $40.32
3/15/20226,410,000 shares $243.13 million +2.6%5.6%5.7 $37.93
2/28/20226,250,000 shares $247.44 million +8.7%5.5%5.4 $39.59
2/15/20225,750,000 shares $205.56 million -10.9%5.0%5 $35.75
1/31/20226,450,000 shares $231.43 million +4.7%5.5%6.4 $35.88
1/15/20226,160,000 shares $230.63 million -3.8%N/A8.6 $37.44
12/31/20216,400,000 shares $264.26 million +0.5%5.4%9.3 $41.29
12/15/20216,370,000 shares $263.27 million -11.3%5.4%9.2 $41.33
11/30/20217,180,000 shares $276.07 million +5.9%6.1%10.4 $38.45
11/15/20216,780,000 shares $284.90 million -1.2%5.8%9.1 $42.02
10/29/20216,860,000 shares $278.17 million -4.3%5.9%9.4 $40.55
10/15/20217,170,000 shares $281.28 million +9.8%6.2%9.7 $39.23
9/30/20216,530,000 shares $260.22 million -2.8%5.6%8.9 $39.85
9/15/20216,720,000 shares $300.65 million +0.2%5.8%9.2 $44.74
8/31/20216,710,000 shares $298.66 million +1.1%5.8%9.6 $44.51

IRDM Short Interest - Frequently Asked Questions

Short interest is the volume of Iridium Communications shares that have been sold short but have not yet been covered or closed out. As of August 14th, traders have sold 2,872,219 shares of IRDM short. 2.79% of Iridium Communications' shares are currently sold short. Learn More on Iridium Communications' 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. IRDM shares currently have a short interest ratio of 2.8. Learn More on Iridium Communications'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. 2.79% of Iridium Communications' floating shares are currently sold short.

Iridium Communications saw a drop in short interest during the month of August. As of August 14th, there was short interest totaling 2,872,219 shares, a drop of 16.9% from the previous total of 3,457,705 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.

2.79% of Iridium Communications' shares are currently sold short. Here is how the short interest of companies in the industry of "diversified telecommunication services" compare to Iridium Communications: Globalstar, Inc. (7.77%), Lumen Technologies, Inc. (6.27%), Uniti Group Inc. (8.49%), Bandwidth Inc. (14.62%), Telesat Corporation (11.80%), Cogent Communications Holdings, Inc. (13.75%), SpaceX (1.41%), AST SpaceMobile, Inc. (18.67%), Rogers Communication, Inc. (4.42%), Telefonica Brasil S.A. (0.21%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($71.57 billion), Invesco QQQ ($46.97 billion), iShares Russell 2000 ETF ($24.02 billion), Nebius Group N.V. ($15.37 billion), Sandisk Corporation ($12.60 billion), SPDR S&P Biotech ETF ($12.14 billion), Western Digital Corporation ($10.32 billion), iShares 20+ Year Treasury Bond ETF ($8.38 billion), VanEck Semiconductor ETF ($7.62 billion), and iShares iBoxx $ High Yield Corporate Bond ETF ($7.07 billion). View all of the most shorted stocks.

Short selling IRDM is an investing strategy that aims to generate trading profit from Iridium Communications as its price is falling. IRDM shares are trading down $1.04 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 Iridium Communications 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 IRDM, 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 IRDM, twice per month. The most recent reporting period available is August, 14 2026.

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

  • 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:IRDM is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/25/2026. FINRA publishes updated short interest twice a month.
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