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Merit Medical Systems (MMSI) Short Interest Ratio & Short Volume

Merit Medical Systems logo
$90.78 +0.51 (+0.56%)
As of 08/21/2026 04:00 PM Eastern
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Merit Medical Systems Short Interest Overview

As of July 31, 2026, Merit Medical Systems (MMSI) had a short interest of 3.74 million shares sold short, representing 6.30% of the public float. This marks a 8.68% increase in short interest since the prior report. The short interest ratio (days to cover) is 3.7, meaning it would take 3.7 days of the average trading volume of 1.19 million shares to cover all short positions.

Current Short Interest
3,738,225 shares
Previous Short Interest
3,439,660 shares
Change Vs. Previous Month
8.68%
Dollar Volume Sold Short
$317.79 million
Short Interest Ratio
3.7 Days to Cover
Last Record Date
July 31, 2026
Outstanding Shares
59,710,000 shares
Short Percent of Float
6.30%
Today's Trading Volume
401,798 shares
Average Trading Volume
1,194,636 shares
Today's Volume Vs. Average
34%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

MMSI Short Interest Over Time

MMSI Days to Cover Over Time

MMSI Percentage of Float Shorted Over Time

Merit Medical 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
7/31/20263,738,225 shares $317.79 million +8.7%6.3%3.74 $85.01
7/15/20263,439,660 shares $251.23 million +1.4%5.8%5.24 $73.04
6/30/20263,391,452 shares $235.16 million +13.5%5.7%3.42 $69.34
6/15/20262,989,413 shares $200.11 million +1.5%5.0%4 $66.94
5/29/20262,945,622 shares $185.84 million +2.4%5.0%4.43 $63.09
5/15/20262,876,824 shares $176.52 million -11.3%4.9%2.61 $61.36
4/30/20263,241,531 shares $221.01 million +10.0%5.5%5.14 $68.18
4/15/20262,948,157 shares $208.52 million -3.4%5.0%5.03 $70.73
3/31/20263,051,194 shares $210.32 million -9.8%5.2%3.5 $68.93
3/13/20263,383,901 shares $236.70 million -4.7%5.9%3.78 $69.95
2/27/20263,552,276 shares $274.16 million -5.1%6.2%4.89 $77.18
2/13/20263,744,234 shares $305.75 million -1.8%6.3%6.18 $81.66
1/30/20263,814,176 shares $309.29 million +1.7%6.7%6.26 $81.09
1/15/20263,749,271 shares $301.25 million -5.8%6.6%3.84 $80.35
12/31/20253,978,884 shares $350.70 million +5.1%7.0%7.73 $88.14
12/15/20253,785,638 shares $327.12 million +17.1%6.6%5.93 $86.41
11/28/20253,231,675 shares $279.83 million +10.6%5.7%4.76 $86.59
11/14/20252,921,809 shares $248.62 million -5.3%5.1%4.2 $85.09
10/31/20253,085,831 shares $270.13 million -7.5%5.4%5.5 $87.54
10/15/20253,330,000 shares $267.97 million -9.5%5.8%5.6 $80.47
9/30/20253,680,000 shares $306.29 million +14.3%N/A5.5 $83.23
9/15/20253,220,000 shares $267.03 million +4.2%N/A4.9 $82.93
8/31/20253,090,000 shares $279.77 million -2.5%5.4%5 $90.54
8/15/20253,170,000 shares $271.07 million -5.7%N/A5.2 $85.51
7/31/20253,360,000 shares $285.13 million -8.5%5.9%5.2 $84.86
7/15/20253,670,000 shares $343.51 million +2.2%N/A5.6 $93.60
6/30/20253,590,000 shares $335.59 million +9.8%6.3%5.4 $93.48
6/15/20253,270,000 shares $304.01 million -4.1%5.7%4.8 $92.97
5/31/20253,410,000 shares $324.12 million +8.3%6.1%4.8 $95.05
5/15/20253,150,000 shares $307.35 million -4.0%5.6%4.1 $97.57
4/30/20253,280,000 shares $309.80 million +0.9%N/A4.4 $94.45
4/15/20253,250,000 shares $298.87 million +20.4%5.8%4.6 $91.96
3/31/20252,700,000 shares $285.42 million -16.7%4.8%4 $105.71
3/15/20253,240,000 shares $320.57 million +7.6%5.8%5.5 $98.94
2/28/20253,010,000 shares $307.14 million No Change5.4%5.5 $102.04
2/15/20253,010,000 shares $325.50 million +2.4%5.4%6.2 $108.14
1/31/20252,940,000 shares $320.11 million +10.5%N/A6.3 $108.88
1/15/20252,660,000 shares $270.07 million +10.8%N/A5.9 $101.53
12/31/20242,400,000 shares $232.13 million -6.6%N/A5.7 $96.72
12/15/20242,570,000 shares $264.09 million +0.4%N/A6.4 $102.76
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11/30/20242,560,000 shares $265.98 million -0.4%N/A6.4 $103.90
11/15/20242,570,000 shares $261.70 million -4.5%N/A6.1 $101.83
10/31/20242,690,000 shares $265.40 million +16.5%N/A6.4 $98.66
10/15/20242,310,000 shares $221.00 million -10.1%N/A5.5 $95.67
9/30/20242,570,000 shares $253.99 million +0.8%N/A5.9 $98.83
9/15/20242,550,000 shares $245.21 million -8.3%N/A5.5 $96.16
8/31/20242,780,000 shares $268.77 million +3.0%N/A6.2 $96.68
8/15/20242,700,000 shares $244.51 million -2.9%N/A6.6 $90.56
7/31/20242,780,000 shares $237.11 million -6.4%N/A6.9 $85.29
7/15/20242,970,000 shares $254.38 million -0.3%N/A7.8 $85.65
6/30/20242,980,000 shares $256.13 million +12.5%N/A8.1 $85.95
6/15/20242,650,000 shares $216.77 million +5.6%N/A7.8 $81.80
5/31/20242,510,000 shares $203.69 million +7.7%N/A7 $81.15
5/15/20242,330,000 shares $195.14 million +3.1%N/A6 $83.75
4/30/20242,260,000 shares $167.47 million +9.7%N/A5.7 $74.10
4/15/20242,060,000 shares $148.24 million +4.0%N/A5 $71.96
3/31/20241,980,000 shares $149.99 million -12.4%N/A4.1 $75.75
3/15/20242,260,000 shares $162.40 million -4.6%N/A4.2 $71.86
2/29/20242,370,000 shares $180.59 million +6.3%N/A3.8 $76.20
2/15/20242,230,000 shares $177.44 million No ChangeN/A3.6 $79.57
1/31/20242,230,000 shares $174.61 million -0.5%N/A3.8 $78.30
1/15/20242,240,000 shares $176.96 million +5.7%N/A3.9 $79.00
12/31/20232,120,000 shares $161.04 million +9.8%N/A4.1 $75.96
12/15/20231,930,000 shares $138.11 million +115.1%N/A4.4 $71.56
11/30/2023897,400 shares $64.22 million -0.9%N/A2.2 $71.56
11/15/2023905,500 shares $65.32 million +13.6%N/A2.9 $72.14
10/31/2023796,800 shares $54.77 million -8.8%N/A2.4 $68.74
10/15/2023874,000 shares $56.49 million -5.2%N/A2.5 $64.63
9/30/2023921,800 shares $63.62 million -9.6%N/A2.6 $69.02
9/15/20231,020,000 shares $69.52 million -1.9%N/A3 $68.16
8/31/20231,040,000 shares $67.89 million +6.9%N/A3 $65.28
8/15/2023972,800 shares $66.53 million +46.5%N/A3 $68.39
7/31/2023664,100 shares $49.59 million +2.3%N/A2.2 $74.67
7/15/2023648,900 shares $54.98 million +5.3%N/A2.3 $84.73
6/30/2023616,500 shares $51.56 million -16.4%N/A2.2 $83.64
6/15/2023737,200 shares $60.59 million +4.1%N/A2.8 $82.19
5/31/2023708,300 shares $58.36 million -8.4%N/A2.8 $82.40
5/15/2023773,100 shares $65.05 million -6.3%N/A2.8 $84.14
4/30/2023825,400 shares $67.10 million +26.9%N/A3 $81.29
4/15/2023650,700 shares $50.41 million +9.7%N/A2.4 $77.47
3/31/2023593,400 shares $43.88 million -14.6%N/A2.2 $73.95
3/15/2023694,900 shares $47.27 million +6.6%N/A2.6 $68.03
2/28/2023652,100 shares $46.03 million +6.7%1.2%2.5 $70.58
2/15/2023610,900 shares $42.84 million +0.7%1.1%2.4 $70.12
1/31/2023606,500 shares $43.27 million -5.2%1.1%2.4 $71.35
1/15/2023639,600 shares $45.00 million +0.4%1.2%2.3 $70.35
12/30/2022637,300 shares $45.01 million +9.8%1.2%2.3 $70.62
12/15/2022580,200 shares $41.33 million +5.6%1.0%2 $71.23
11/30/2022549,200 shares $39.54 million -34.2%1.0%1.8 $72.00
11/15/2022834,700 shares $58.33 million -29.9%1.5%2.7 $69.88
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10/31/20221,190,000 shares $81.84 million -4.8%2.1%3.7 $68.77
10/15/20221,250,000 shares $68.40 million -3.9%2.3%3.6 $54.72
9/30/20221,300,000 shares $73.46 million +34.8%2.3%3.7 $56.51
9/15/2022964,500 shares $57.25 million -9.9%1.7%2.7 $59.36
8/31/20221,070,000 shares $63.38 million +12.6%1.9%3.1 $59.23
8/15/2022950,700 shares $60.45 million -4.9%1.7%2.8 $63.58
7/31/20221,000,000 shares $57.48 million -4.8%1.9%2.9 $57.48
7/15/20221,050,000 shares $55.93 million -9.5%2.0%3.1 $53.27
6/30/20221,160,000 shares $62.95 million -0.9%2.2%3.2 $54.27
6/15/20221,170,000 shares $62.49 million +1.7%2.2%3.1 $53.41
5/31/20221,150,000 shares $70.60 million -29.9%2.1%2.9 $61.39
5/15/20221,640,000 shares $96.51 million +43.9%3.0%3.8 $58.85
4/30/20221,140,000 shares $70.69 million +7.6%2.1%2.7 $62.01
4/15/20221,060,000 shares $72.97 million +8.9%1.9%2.7 $68.84
3/31/2022973,700 shares $64.77 million -4.5%1.8%2.7 $66.52
3/15/20221,020,000 shares $64.15 million -25.6%1.8%3 $62.89
2/28/20221,370,000 shares $89.09 million +33.0%2.5%3.9 $65.03
2/15/20221,030,000 shares $60.36 million +11.9%1.9%3.2 $58.60
1/31/2022920,800 shares $51.06 million +4.9%1.7%3.3 $55.45
1/15/2022878,200 shares $50.77 million -12.2%1.6%3 $57.81
12/31/20211,000,000 shares $62.30 million -11.5%1.8%3.2 $62.30
12/15/20211,130,000 shares $70.16 million -2.6%2.1%3.9 $62.09
11/30/20211,160,000 shares $72.92 million -1.7%2.1%4.3 $62.86
11/15/20211,180,000 shares $80.24 million -0.8%2.1%4.7 $68.00
10/29/20211,190,000 shares $80.04 million -24.2%2.2%4.7 $67.26
10/15/20211,570,000 shares $109.26 million -3.1%2.9%6.2 $69.59
9/30/20211,620,000 shares $116.32 million -0.6%2.9%7.1 $71.80
9/15/20211,630,000 shares $118.00 million No Change3.0%6.5 $72.39
8/31/20211,630,000 shares $116.99 million -3.6%3.0%6.6 $71.77

MMSI Short Interest - Frequently Asked Questions

Short interest is the volume of Merit Medical Systems shares that have been sold short but have not yet been covered or closed out. As of July 31st, traders have sold 3,738,225 shares of MMSI short. 6.30% of Merit Medical Systems' shares are currently sold short. Learn More on Merit Medical 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. MMSI shares currently have a short interest ratio of 3.7. Learn More on Merit Medical 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. 6.30% of Merit Medical Systems' floating shares are currently sold short.

Merit Medical Systems saw a increase in short interest in the month of July. As of July 31st, there was short interest totaling 3,738,225 shares, an increase of 8.7% from the previous total of 3,439,660 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.

6.30% of Merit Medical Systems' shares are currently sold short. Here is how the short interest of companies in the sector of "healthcare" compare to Merit Medical Systems: Addus HomeCare Corporation (6.73%), HealthEquity, Inc. (5.07%), Medpace Holdings, Inc. (7.87%), AMN Healthcare Services Inc (8.86%), Elevance Health, Inc. (2.58%), Integer Holdings Corporation (10.99%), Envista Holdings Corporation (7.48%), West Pharmaceutical Services, Inc. (3.59%), Solventum Corporation (2.07%), The Cooper Companies, Inc. (4.37%),

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 MMSI is an investing strategy that aims to generate trading profit from Merit Medical Systems as its price is falling. MMSI shares are trading up $0.51 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 Merit Medical 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 MMSI, 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 MMSI, 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 MMSI:

  • 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:MMSI 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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