Merit Medical Systems (MMSI) Short Interest Ratio & Short Volume $98.81 +0.71 (+0.72%) As of 05/20/2025 04:00 PM Eastern Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Merit Medical Systems Short Interest DataMerit Medical Systems (MMSI) has a short interest of 3.28 million shares. This marks a 0.92% increase in short interest from the previous month. The short interest ratio (days to cover) is 4.4, indicating that it would take 4.4 days of the average trading volume of 516,657 shares to cover all short positions.Current Short Interest3,280,000 sharesPrevious Short Interest3,250,000 sharesChange Vs. Previous Month+0.92%Dollar Volume Sold Short$309.80 millionShort Interest Ratio4.4 Days to CoverLast Record DateApril 30, 2025Outstanding Shares59,100,000 sharesPercentage of Shares Shorted5.55%Today's Trading Volume926,676 sharesAverage Trading Volume516,657 sharesToday's Volume Vs. Average179% Short Selling Merit Medical Systems? Sign up to receive the latest short interest report for Merit Medical Systems and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartMMSI Short Interest Over TimeMMSI Days to Cover Over TimeMMSI Percentage of Float Shorted Over Time Merit Medical Systems Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 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 Get the Latest News and Ratings for MMSI and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Merit Medical Systems and its competitors with MarketBeat's FREE daily newsletter. 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 $68.16Trump wipes out trillions overnight… (Ad)Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out nearly $5 trillion in wealth from the S&P 500 and $6.4 trillion from the Dow Jones… Not to mention the countless trillions of dollars lost in every market around the world… leaving the major political powers scrambling in fear of Trump’s next move.Whether you take some of that wealth for yourself depends on if you watch this controversial exposé 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 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 8/13/20211,690,000 shares $111.54 million -6.6%3.1%6.7 $66.00Trump wipes out trillions overnight… (Ad)Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out nearly $5 trillion in wealth from the S&P 500 and $6.4 trillion from the Dow Jones… Not to mention the countless trillions of dollars lost in every market around the world… leaving the major political powers scrambling in fear of Trump’s next move.Whether you take some of that wealth for yourself depends on if you watch this controversial exposé 7/30/20211,810,000 shares $126.86 million +5.9%3.3%6.9 $70.09 7/15/20211,710,000 shares $102.55 million -3.9%3.1%6.8 $59.97 6/30/20211,780,000 shares $115.09 million -11.9%3.3%7.1 $64.66 6/15/20212,020,000 shares $125.22 million -1.5%3.7%8 $61.99 5/28/20212,050,000 shares $123.70 million -0.5%3.7%7.8 $60.34 5/14/20212,060,000 shares $122.94 million +0.5%3.8%7.4 $59.68 4/30/20212,050,000 shares $129.79 million -10.1%3.8%7.4 $63.31 4/15/20212,280,000 shares $139.99 million -3.8%4.2%8.2 $61.40 3/31/20212,370,000 shares $141.16 million -8.9%4.4%8.3 $59.56 3/15/20212,600,000 shares $154.93 million -3.7%4.8%8.7 $59.59 2/26/20212,700,000 shares $148.10 million -6.6%5.0%8.7 $54.85 2/12/20212,890,000 shares $176.26 million -4.0%5.4%9.1 $60.99 1/29/20213,010,000 shares $166.48 million -4.1%5.6%9 $55.31 1/15/20213,140,000 shares $176.97 million -4.3%5.8%8.5 $56.36 12/31/20203,280,000 shares $179.61 million No Change6.1%8.7 $54.76 12/15/20203,280,000 shares $176.60 million -13.2%6.1%8.4 $53.84 11/30/20203,780,000 shares $207.14 million +0.8%7.0%8.9 $54.80 11/15/20203,750,000 shares $192.26 million -4.8%7.0%9.3 $51.27 10/30/20203,940,000 shares $203.26 million +10.1%7.3%9.8 $51.59 10/15/20203,580,000 shares $170.37 million +1.1%6.7%9.2 $47.59 9/30/20203,540,000 shares $153.99 million -10.4%6.6%8.8 $43.50 9/15/20203,950,000 shares $171.94 million +4.5%7.4%9.5 $43.53 8/31/20203,780,000 shares $185.60 million +0.8%7.0%10.2 $49.10 8/14/20203,750,000 shares $174.71 million +5.3%7.0%9.4 $46.59 7/31/20203,560,000 shares $159.20 million -13.4%6.6%8.7 $44.72 7/15/20204,110,000 shares $177.92 million -10.1%7.7%9.5 $43.29 6/30/20204,570,000 shares $200.71 million +2.5%8.5%10.3 $43.92 6/15/20204,460,000 shares $186.83 million -4.7%8.3%9.4 $41.89 5/29/20204,680,000 shares $203.86 million -4.5%8.7%8.3 $43.56 MMSI Short Interest - Frequently Asked Questions What is Merit Medical Systems' current short interest? Short interest is the volume of Merit Medical Systems shares that have been sold short but have not yet been closed out or covered. As of April 30th, traders have sold 3,280,000 shares of MMSI short. Learn More on Merit Medical Systems' current short interest. What is a good short interest ratio for Merit Medical Systems? 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 4.0. Learn More on Merit Medical Systems's short interest ratio. Which institutional investors are shorting Merit Medical Systems? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Merit Medical Systems: Garda Capital Partners LP, Simplex Trading LLC, and Portman Square Capital LLP. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Merit Medical Systems' short interest increasing or decreasing? Merit Medical Systems saw a increase in short interest in April. As of April 30th, there was short interest totaling 3,280,000 shares, an increase of 0.9% from the previous total of 3,250,000 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. How does Merit Medical Systems' short interest compare to its competitors? Here is how the short interest of companies compare to Merit Medical Systems: The Cooper Companies, Inc. (2.36%), West Pharmaceutical Services, Inc. (3.53%), Align Technology, Inc. (4.70%), ICU Medical, Inc. (4.27%), Haemonetics Co. (8.76%), DENTSPLY SIRONA Inc. (4.17%), QuidelOrtho Co. (6.34%), Neogen Co. (12.50%), STAAR Surgical (12.54%), Cerus Co. (4.91%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 billion). View all of the most shorted stocks. What does it mean to sell short Merit Medical Systems stock? 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 $0.71 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. How does a short squeeze work against Merit Medical Systems? A short squeeze for Merit Medical Systems 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 MMSI, which in turn drives the price of the stock up even further. How often is Merit Medical Systems' short interest reported? 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 April, 30 2025. More Short Interest Resources from MarketBeat Related Companies COO Short Squeeze WST Short Squeeze ALGN Short Squeeze ICUI Short Squeeze HAE Short Squeeze XRAY Short Squeeze QDEL Short Squeeze NEOG Short Squeeze STAA Short Squeeze CERS Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:MMSI) was last updated on 5/21/2025 by MarketBeat.com Staff From Our PartnersWhite House to reset Social Security?Elon Musk's parting DOGE gift looks set to shock America... A single announcement by July 22nd could soon b...Altimetry | SponsoredTrump’s treachery Trump’s Final Reset Inside the shocking plot to re-engineer America’s financial system…and why you need to ...Porter & Company | SponsoredMan who predicted $100K Bitcoin sees a huge run coming for another coin …Sure enough, Bitcoin took off on the exact day Juan said it would. 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