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Mercury Systems (MRCY) Short Interest Ratio & Short Volume

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$109.66 -0.13 (-0.12%)
As of 10:24 AM Eastern
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Mercury Systems Short Interest Overview

As of July 31, 2026, Mercury Systems (MRCY) had a short interest of 4.95 million shares sold short, representing 8.36% of the public float. This marks a 3.05% 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 648,770 shares to cover all short positions.

Current Short Interest
4,952,067 shares
Previous Short Interest
4,805,548 shares
Change Vs. Previous Month
3.05%
Dollar Volume Sold Short
$480.85 million
Short Interest Ratio
7.9 Days to Cover
Last Record Date
July 31, 2026
Outstanding Shares
60,043,000 shares
Short Percent of Float
8.36%
Today's Trading Volume
27,339 shares
Average Trading Volume
648,770 shares
Today's Volume Vs. Average
4%
Short Selling Mercury Systems?
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

MRCY Short Interest Over Time

MRCY Days to Cover Over Time

MRCY Percentage of Float Shorted Over Time

Mercury Systems 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
7/31/20264,952,067 shares $480.85 million +3.1%8.4%7.92 $97.10
7/15/20264,805,548 shares $494.83 million +3.6%8.1%8.52 $102.97
6/30/20264,639,605 shares $567.56 million +1.5%7.8%4.73 $122.33
6/15/20264,572,200 shares $530.06 million -3.4%7.7%6.16 $115.93
5/29/20264,733,680 shares $528.75 million -2.7%8.0%7.73 $111.70
5/15/20264,865,616 shares $447.78 million +2.5%8.2%7.73 $92.03
4/30/20264,746,107 shares $374.52 million +1.6%8.0%9.44 $78.91
4/15/20264,672,746 shares $399.57 million +5.0%7.9%10.76 $85.51
3/31/20264,450,059 shares $324.45 million +10.4%7.5%6.4 $72.91
3/13/20264,029,807 shares $314.97 million +2.2%6.8%6.46 $78.16
2/27/20263,942,005 shares $350.96 million +6.3%6.7%11.16 $89.03
2/13/20263,707,404 shares $305.34 million -3.2%6.3%4.12 $82.36
1/30/20263,828,163 shares $359.39 million -25.2%6.5%5.81 $93.88
1/15/20265,120,404 shares $527.15 million +4.9%8.6%6.65 $102.95
12/31/20254,880,496 shares $356.33 million -1.7%8.2%7.91 $73.01
12/15/20254,964,253 shares $369.79 million +1.7%8.4%8.47 $74.49
11/28/20254,881,034 shares $363.59 million -0.9%8.2%7.55 $74.49
11/14/20254,927,196 shares $349.09 million +12.0%8.3%7.57 $70.85
10/31/20254,399,450 shares $340.56 million -6.5%7.4%8.45 $77.41
10/15/20254,710,000 shares $368.09 million +0.6%8.0%6.8 $78.15
9/30/20254,680,000 shares $362.23 million +4.7%N/A6.6 $77.40
9/15/20254,470,000 shares $325.46 million -5.1%N/A6.3 $72.81
8/31/20254,710,000 shares $318.16 million -3.3%8.0%6.6 $67.55
8/15/20254,870,000 shares $324.83 million -3.0%N/A6.7 $66.70
7/31/20255,020,000 shares $264.00 million +5.7%8.5%7.7 $52.59
7/15/20254,750,000 shares $237.93 million -5.9%N/A7.3 $50.09
6/30/20255,050,000 shares $271.99 million +5.4%8.6%7.9 $53.86
6/15/20254,790,000 shares $253.77 million -0.8%8.1%7.9 $52.98
5/31/20254,830,000 shares $235.08 million +14.2%8.2%8.5 $48.67
5/15/20254,230,000 shares $194.03 million +8.5%7.2%7.7 $45.87
4/30/20253,900,000 shares $195 million -2.0%N/A7 $50.00
4/15/20253,980,000 shares $191.16 million -1.0%6.8%6.9 $48.03
3/31/20254,020,000 shares $173.22 million +3.1%6.8%7.3 $43.09
3/15/20253,900,000 shares $181.43 million +1.8%6.6%7.4 $46.52
2/28/20253,830,000 shares $170.09 million -0.8%6.5%7.1 $44.41
2/15/20253,860,000 shares $171.58 million -6.5%6.6%7.4 $44.45
1/31/20254,130,000 shares $172.18 million -5.3%N/A7.6 $41.69
1/15/20254,360,000 shares $188.70 million +1.2%N/A9.2 $43.28
12/31/20244,310,000 shares $181.02 million -4.7%N/A8.9 $42.00
12/15/20244,520,000 shares $171.17 million +3.0%N/A9.6 $37.87
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11/30/20244,390,000 shares $180.56 million +1.4%N/A9.6 $41.13
11/15/20244,330,000 shares $170.26 million -1.6%N/A10 $39.32
10/31/20244,400,000 shares $142.34 million -5.4%N/A7.5 $32.35
10/15/20244,650,000 shares $167.35 million -4.5%N/A8 $35.99
9/30/20244,870,000 shares $180.19 million -7.6%N/A8 $37.00
9/15/20245,270,000 shares $200.37 million -3.0%N/A6.8 $38.02
8/31/20245,430,000 shares $205.80 million -5.4%N/A6.9 $37.90
8/15/20245,740,000 shares $230.29 million +4.7%N/A7.3 $40.12
7/31/20245,480,000 shares $194.81 million +9.0%N/A8.1 $35.55
7/15/20245,030,000 shares $163.02 million +8.9%N/A7.6 $32.41
6/30/20244,620,000 shares $124.69 million +0.7%N/A7.6 $26.99
6/15/20244,590,000 shares $131.69 million -2.1%N/A10 $28.69
5/31/20244,690,000 shares $145.16 million +6.8%N/A10.9 $30.95
5/15/20244,390,000 shares $130.43 million +2.8%N/A9.7 $29.71
4/30/20244,270,000 shares $120.41 million +3.9%N/A7.6 $28.20
4/15/20244,110,000 shares $116.72 million +9.6%N/A7.7 $28.40
3/31/20243,750,000 shares $110.63 million -0.5%N/A6.6 $29.50
3/15/20243,770,000 shares $108.39 million +1.9%N/A6.6 $28.75
2/29/20243,700,000 shares $110.52 million -0.5%N/A6.4 $29.87
2/15/20243,720,000 shares $113.24 million +8.8%N/A6.8 $30.44
1/31/20243,420,000 shares $101.44 million -0.6%N/A6.7 $29.66
1/15/20243,440,000 shares $111.18 million -0.3%N/A7.8 $32.32
12/31/20233,450,000 shares $126.17 million -5.7%N/A8.3 $36.57
12/15/20233,660,000 shares $137.10 million +6.4%N/A8.6 $37.46
11/30/20233,440,000 shares $117.96 million -6.3%N/A7.3 $34.29
11/15/20233,670,000 shares $127.64 million +16.9%N/A7.3 $34.78
10/31/20233,140,000 shares $112.98 million +2.6%N/A4 $35.98
10/15/20233,060,000 shares $118.21 million +6.3%N/A4 $38.63
9/30/20232,880,000 shares $106.82 million -2.0%N/A3.7 $37.09
9/15/20232,940,000 shares $111.51 million +5.4%N/A3.2 $37.93
8/31/20232,790,000 shares $109.51 million +10.7%5.0%3.1 $39.25
8/15/20232,520,000 shares $85.28 million +10.5%N/A3 $33.84
7/31/20232,280,000 shares $86.59 million No ChangeN/A4.3 $37.98
7/15/20232,280,000 shares $78.39 million +2.7%N/A4 $34.38
6/30/20232,220,000 shares $76.79 million +0.9%N/A3.9 $34.59
6/15/20232,200,000 shares $87.34 million -7.2%N/A4.6 $39.70
5/31/20232,370,000 shares $96.20 million +0.9%N/A7.6 $40.59
5/15/20232,350,000 shares $98.58 million +5.9%N/A7.3 $41.95
4/30/20232,220,000 shares $105.83 million -3.9%N/A6.8 $47.67
4/15/20232,310,000 shares $115.25 million +4.1%N/A7.3 $49.89
3/31/20232,220,000 shares $113.49 million +6.2%N/A7.1 $51.12
3/15/20232,090,000 shares $101.16 million -2.8%N/A6.5 $48.40
2/28/20232,150,000 shares $112.53 million -0.9%N/A5.8 $52.34
2/15/20232,170,000 shares $118.68 million -13.2%N/A5.9 $54.69
1/31/20232,500,000 shares $124.96 million +0.4%N/A6.8 $49.99
1/15/20232,490,000 shares $117.85 million -2.7%N/A7.5 $47.33
12/30/20222,560,000 shares $114.53 million +1.6%N/A7.3 $44.74
12/15/20222,520,000 shares $119.62 million +15.6%N/A7 $47.47
11/30/20222,180,000 shares $110.79 million No ChangeN/A6.6 $50.82
11/15/20222,180,000 shares $109.24 million +8.5%N/A6.9 $50.11
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10/31/20222,010,000 shares $97.28 million +2.6%3.6%6.1 $48.40
10/15/20221,960,000 shares $81.89 million -14.0%3.5%5 $41.78
9/30/20222,280,000 shares $92.57 million +12.9%4.1%6 $40.60
9/15/20222,020,000 shares $95.32 million +3.1%3.6%5 $47.19
8/31/20221,960,000 shares $94.33 million +4.3%3.5%4.9 $48.13
8/15/20221,880,000 shares $96.71 million -2.6%3.4%4.4 $51.44
7/31/20221,930,000 shares $113.89 million +14.2%3.5%4.3 $59.01
7/15/20221,690,000 shares $107.59 million -11.1%3.0%4.2 $63.66
6/30/20221,900,000 shares $122.23 million -8.2%3.4%4.7 $64.33
6/15/20222,070,000 shares $122.34 million -18.2%3.7%5.1 $59.10
5/31/20222,530,000 shares $151.32 million -23.6%4.5%5.7 $59.81
5/15/20223,310,000 shares $196.05 million -4.3%5.9%6 $59.23
4/30/20223,460,000 shares $193.03 million -2.5%6.3%6.4 $55.79
4/15/20223,550,000 shares $217.37 million -3.0%6.5%5.9 $61.23
3/31/20223,660,000 shares $235.89 million -5.9%6.7%5.6 $64.45
3/15/20223,890,000 shares $253.32 million -1.5%7.1%5.1 $65.12
2/28/20223,950,000 shares $237.87 million +9.1%7.2%4.8 $60.22
2/15/20223,620,000 shares $191.79 million +14.6%6.5%4.8 $52.98
1/31/20223,160,000 shares $179.87 million +1.0%5.7%4.1 $56.92
1/15/20223,130,000 shares $187.74 million +5.4%5.7%4.3 $59.98
12/31/20212,970,000 shares $163.53 million +10.8%5.4%4.4 $55.06
12/15/20212,680,000 shares $135.88 million +4.7%4.8%4.1 $50.70
11/30/20212,560,000 shares $125.31 million +13.8%4.6%4.7 $48.95
11/15/20212,250,000 shares $117.05 million -19.9%4.1%4.8 $52.02
10/29/20212,810,000 shares $144.83 million +14.2%5.1%5.9 $51.54
10/15/20212,460,000 shares $123.22 million +69.7%4.4%4.7 $50.09
9/30/20211,450,000 shares $68.76 million +0.7%2.6%3 $47.42
9/15/20211,440,000 shares $66.57 million -2.7%2.6%3.1 $46.23
8/31/20211,480,000 shares $74.56 million +37.0%2.7%3.5 $50.38

MRCY Short Interest - Frequently Asked Questions

Short interest is the volume of Mercury Systems shares that have been sold short but have not yet been covered or closed out. As of July 31st, investors have sold 4,952,067 shares of MRCY short. 8.36% of Mercury Systems' shares are currently sold short. Learn More on Mercury Systems' 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. MRCY shares currently have a short interest ratio of 7.9. Learn More on Mercury Systems'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. 8.36% of Mercury Systems' floating shares are currently sold short.

Mercury Systems saw a increase in short interest during the month of July. As of July 31st, there was short interest totaling 4,952,067 shares, an increase of 3.0% from the previous total of 4,805,548 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.

8.36% of Mercury Systems' shares are currently sold short. Here is how the short interest of companies in the industry of "aerospace & defense" compare to Mercury Systems: Curtiss-Wright Corporation (1.95%), Arxis, Inc. (0.58%), FTAI Aviation Ltd. (6.86%), Woodward, Inc. (2.00%), BWX Technologies, Inc. (3.18%), Textron Inc. (4.00%), Embraer-Empresa Brasileira de Aeronautica (1.32%), Huntington Ingalls Industries, Inc. (2.90%), Leonardo DRS, Inc. (1.12%), Kratos Defense & Security Solutions, Inc. (5.16%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.50 billion), Invesco QQQ ($50.36 billion), iShares Russell 2000 ETF ($21.20 billion), Western Digital Corporation ($13.40 billion), SPDR S&P Biotech ETF ($11.59 billion), Nebius Group N.V. ($11.46 billion), iShares 20+ Year Treasury Bond ETF ($7.84 billion), iShares iBoxx $ High Yield Corporate Bond ETF ($7.51 billion), iShares Semiconductor ETF ($6.37 billion), and Financial Select Sector SPDR Fund ($6.34 billion). View all of the most shorted stocks.

Short selling MRCY is an investing strategy that aims to generate trading profit from Mercury Systems as its price is falling. MRCY shares are trading down $1.85 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 Mercury Systems 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 MRCY, 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 MRCY, twice per month. The most recent reporting period available is July, 31 2026.

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

  • 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:MRCY is sourced from the Financial Industry Regulatory Authority (FINRA), with the most recent report published on 8/11/2026. FINRA publishes updated short interest twice a month.
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