TransMedics Group (TMDX) Short Interest Ratio & Short Volume $140.86 +1.46 (+1.05%) Closing price 06/10/2025 04:00 PM EasternExtended Trading$141.96 +1.10 (+0.78%) As of 06:16 AM 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 Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock TransMedics Group Short Interest DataTransMedics Group (TMDX) has a short interest of 8.10 million shares, representing 25.95% of the float (the number of shares available for trading by the public). This marks a -7.95% decrease in short interest from the previous month. The short interest ratio (days to cover) is 6.9, indicating that it would take 6.9 days of the average trading volume of 1.35 million shares to cover all short positions.Current Short Interest8,100,000 sharesPrevious Short Interest8,800,000 sharesChange Vs. Previous Month-7.95%Dollar Volume Sold Short$986.66 millionShort Interest Ratio6.9 Days to CoverLast Record DateMay 15, 2025Outstanding Shares33,824,000 sharesShort Percent of Float25.95%Today's Trading Volume920,896 sharesAverage Trading Volume1,354,641 sharesToday's Volume Vs. Average68% Short Selling TransMedics Group? Sign up to receive the latest short interest report for TransMedics Group and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartTMDX Short Interest Over TimeTMDX Days to Cover Over TimeTMDX Percentage of Float Shorted Over Time TransMedics Group Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 5/15/20258,100,000 shares $986.66 million -8.0%26.0%6.9 $121.81 4/30/20258,800,000 shares $809.69 million +0.2%N/A7.3 $92.01 4/15/20258,780,000 shares $765.44 million -7.4%28.1%7.1 $87.18 3/31/20259,480,000 shares $637.81 million -0.7%30.4%5.7 $67.28 3/15/20259,550,000 shares $654.46 million +2.4%30.6%5.5 $68.53 2/28/20259,330,000 shares $712.07 million -13.3%29.9%5 $76.32 2/15/202510,760,000 shares $776.66 million -3.3%34.5%5.5 $72.18 1/31/202511,130,000 shares $751.83 million +23.8%N/A5.6 $67.55 1/15/20258,990,000 shares $543.36 million -1.8%N/A4 $60.44 12/31/20249,150,000 shares $570.50 million +5.9%N/A4.6 $62.35 Get the Latest News and Ratings for TMDX and Related StocksEnter your email address below to receive the latest news and analysts' ratings for TransMedics Group and its competitors with MarketBeat's FREE daily newsletter. 12/15/20248,640,000 shares $555.21 million -7.0%N/A4.7 $64.26 11/30/20249,290,000 shares $805.54 million +3.5%N/A5.3 $86.71 11/15/20248,980,000 shares $722.71 million +6.5%N/A5.7 $80.48 10/31/20248,430,000 shares $691.01 million +30.9%N/A6.1 $81.97 10/15/20246,440,000 shares $849.05 million +7.0%N/A6.1 $131.84 9/30/20246,020,000 shares $945.14 million +9.5%N/A6.1 $157.00 9/15/20245,500,000 shares $832.81 million -6.3%N/A6.9 $151.42 8/31/20245,870,000 shares $986.51 million -3.1%N/A7.5 $168.06 8/15/20246,060,000 shares $1.03 billion +5.4%N/A8.1 $169.95 7/31/20245,750,000 shares $818.00 million -2.0%N/A7.5 $142.26 7/15/20245,870,000 shares $847.33 million -2.2%N/A7.4 $144.35 6/30/20246,000,000 shares $903.72 million +0.3%N/A7 $150.62 6/15/20245,981,200 shares $849.39 million +3.8%N/A6.8 $142.01 5/31/20245,760,000 shares $785.66 million +8.7%N/A6.6 $136.40 5/15/20245,300,000 shares $721.54 million -2.2%N/A5.6 $136.14 4/30/20245,420,000 shares $510.18 million -14.4%N/A6.1 $94.13 4/15/20246,330,000 shares $581.22 million +5.7%N/A8.7 $91.82 3/31/20245,990,000 shares $442.90 million +10.7%N/A8.9 $73.94 3/15/20245,410,000 shares $410.84 million +8.6%N/A9 $75.94 2/29/20244,980,000 shares $406.37 million +1.0%N/A8.8 $81.60 2/15/20244,930,000 shares $441.04 million -9.0%N/A9.4 $89.46 1/31/20245,420,000 shares $464.87 million No ChangeN/A8.2 $85.77 1/15/20245,420,000 shares $441.46 million -2.9%N/A7.5 $81.45 12/31/20235,580,000 shares $440.43 million -0.2%N/A7 $78.93 12/15/20235,590,000 shares $433.23 million -5.3%N/A6.8 $77.50 11/30/20235,900,000 shares $446.51 million -5.1%N/A6.7 $75.68 11/15/20236,220,000 shares $407.97 million -4.5%N/A6.9 $65.59 10/31/20236,510,000 shares $243.99 million +11.3%N/A7.1 $37.48 10/15/20235,850,000 shares $250.09 million +12.7%N/A7.3 $42.75 9/30/20235,190,000 shares $284.15 million +8.8%N/A7 $54.75The End of Elon Musk…? (Ad)The End of Elon Musk? Don't make him laugh. Jeff Brown has been hearing this same tired story for years, and he's been proven right time and time again. And now, while the media focuses on Tesla's "demise," he's uncovered an AI breakthrough that's about to make Elon's doubters eat their words yet again. According to his research, if you listen to the media and miss out on Elon's newest breakthrough, it's going to cost you the fortune of a lifetime.Click here to see why the "End of Elon" crowd is about to be wrong again. 9/15/20234,770,000 shares $284.01 million +14.9%N/A7 $59.54 8/31/20234,150,000 shares $272.36 million +13.1%N/A6.2 $65.63 8/15/20233,670,000 shares $231.17 million +3.4%N/A5.9 $62.99 7/31/20233,550,000 shares $330.79 million -8.3%N/A5.4 $93.18 7/15/20233,870,000 shares $354.14 million -2.0%N/A6.2 $91.51 6/30/20233,950,000 shares $331.72 million +3.7%N/A6.4 $83.98 6/15/20233,810,000 shares $303.43 million +9.2%N/A6.2 $79.64 5/31/20233,490,000 shares $253.58 million +5.8%N/A5.6 $72.66 5/15/20233,300,000 shares $247.37 million +35.3%N/A5.2 $74.96 4/30/20232,440,000 shares $193.00 million +13.0%N/A4.1 $79.10 4/15/20232,160,000 shares $143.06 million +16.8%N/A4.3 $66.23 3/31/20231,850,000 shares $140.10 million +14.2%N/A4.2 $75.73 3/15/20231,620,000 shares $121.06 million +8.0%N/A3.9 $74.73 2/28/20231,500,000 shares $120.11 million +11.9%N/A3.8 $80.07 2/15/20231,340,000 shares $90.24 million +1.5%N/A3.6 $67.34 1/31/20231,320,000 shares $83.19 million -12.6%N/A3.9 $63.02 1/15/20231,510,000 shares $91.96 million -1.3%N/A4.2 $60.90 12/30/20221,530,000 shares $94.43 million No ChangeN/A4.5 $61.72 12/15/20221,530,000 shares $90.93 million -19.9%N/A4.3 $59.43 11/30/20221,910,000 shares $118.17 million -9.9%N/A4.9 $61.87 11/15/20222,120,000 shares $121.96 million -7.4%N/A5.2 $57.53 10/31/20222,290,000 shares $110.42 million -1.7%N/A5.4 $48.22 10/15/20222,330,000 shares $91.06 million +13.7%N/A5 $39.08 9/30/20222,050,000 shares $85.57 million +45.4%N/A4.4 $41.74 9/15/20221,410,000 shares $73.94 million -7.8%N/A3.1 $52.44 8/31/20221,530,000 shares $79.61 million -1.3%N/A3.7 $52.03 8/15/20221,550,000 shares $73.78 million -1.9%N/A4.2 $47.60 7/31/20221,580,000 shares $63.80 million +5.3%N/A4.6 $40.38 7/15/20221,500,000 shares $50.10 million -11.8%5.8%5 $33.40 6/30/20221,700,000 shares $53.47 million +4.9%6.6%6 $31.45 6/15/20221,620,000 shares $45.68 million +3.2%6.3%6.1 $28.20 5/31/20221,570,000 shares $45.80 million -9.3%6.1%5.6 $29.17 5/15/20221,730,000 shares $50.53 million +55.9%6.7%5.8 $29.21 4/30/20221,110,000 shares $23.27 million -0.9%4.3%4 $20.96 4/15/20221,120,000 shares $26.30 million No Change4.4%5.3 $23.48 3/31/20221,120,000 shares $30.17 million -33.7%4.4%5.4 $26.94 3/15/20221,690,000 shares $30.01 million +10.5%6.6%8.3 $17.76 2/28/20221,530,000 shares $28.34 million +25.4%6.0%8.3 $18.52 2/15/20221,220,000 shares $19.04 million +8.9%4.8%6.5 $15.61 1/31/20221,120,000 shares $17.77 million +1.8%4.9%5.7 $15.87 1/15/20221,100,000 shares $18.16 million +0.9%4.8%5.6 $16.51 12/31/20211,090,000 shares $20.88 million -18.7%4.7%5.4 $19.16 12/15/20211,340,000 shares $29.25 million +4.7%5.8%6.2 $21.83 11/30/20211,280,000 shares $28.21 million -3.8%5.2%6.1 $22.04 11/15/20211,330,000 shares $34.22 million +50.1%5.4%5.9 $25.73 10/29/2021886,200 shares $24.31 million -5.9%3.6%4.4 $27.43 10/15/2021942,000 shares $25.01 million +0.5%3.8%4.3 $26.55 9/30/2021936,900 shares $31.00 million -8.2%3.8%3.5 $33.09 9/15/20211,020,000 shares $32.29 million -5.6%4.1%3.4 $31.66 8/31/20211,080,000 shares $35.29 million -12.2%4.4%3.3 $32.68The End of Elon Musk…? (Ad)The End of Elon Musk? Don't make him laugh. Jeff Brown has been hearing this same tired story for years, and he's been proven right time and time again. And now, while the media focuses on Tesla's "demise," he's uncovered an AI breakthrough that's about to make Elon's doubters eat their words yet again. According to his research, if you listen to the media and miss out on Elon's newest breakthrough, it's going to cost you the fortune of a lifetime.Click here to see why the "End of Elon" crowd is about to be wrong again. 8/13/20211,230,000 shares $35.74 million -12.8%5.0%3.8 $29.06 7/30/20211,410,000 shares $40.21 million +6.8%5.7%4.1 $28.52 7/15/20211,320,000 shares $40.97 million -14.3%5.3%3.4 $31.04 6/30/20211,540,000 shares $51.10 million +10.0%6.2%3.8 $33.18 6/15/20211,400,000 shares $39.91 million +11.1%5.7%2.7 $28.51 5/28/20211,260,000 shares $32.31 million +23.5%5.1%2.1 $25.64 5/14/20211,020,000 shares $22.06 million +2.4%N/A1.4 $21.63 4/30/2021996,100 shares $28.71 million +13.0%N/A1 $28.82 4/15/2021881,700 shares $25.68 million -9.4%N/A1 $29.13 3/31/2021973,300 shares $39.69 million +30.8%N/A1.1 $40.78 3/15/2021744,400 shares $26.96 million -35.3%N/A1.1 $36.22 2/26/20211,150,000 shares $42.41 million +33.8%N/A2.1 $36.88 2/12/2021859,300 shares $25.74 million -4.2%N/A2.1 $29.95 1/29/2021896,700 shares $20.96 million +3.3%N/A6 $23.38 1/15/2021868,200 shares $16.58 million +2.1%N/A8.9 $19.10 12/31/2020850,400 shares $16.13 million +1.3%N/A10.5 $18.97 12/15/2020839,400 shares $12.92 million -10.4%N/A7 $15.39 11/30/2020937,200 shares $13.86 million -2.9%N/A6.3 $14.79 11/15/2020965,200 shares $13.83 million +10.6%N/A6 $14.33 10/30/2020873,100 shares $10.82 million -9.1%N/A5.1 $12.39 10/15/2020960,900 shares $12.51 million -39.9%N/A5.3 $13.02 9/30/20201,600,000 shares $22.05 million +15.1%N/A8.4 $13.78 9/15/20201,390,000 shares $23.96 million +18.8%N/A7.7 $17.24 8/31/20201,170,000 shares $20.86 million -0.9%N/A7.2 $17.83 8/14/20201,180,000 shares $21.71 million -9.2%N/A5.7 $18.40 7/31/20201,300,000 shares $23.48 million -10.3%N/A6.6 $18.06 7/15/20201,450,000 shares $24.11 million +10.7%N/A7.7 $16.63 6/30/20201,310,000 shares $23.48 million +21.3%6.5%7.1 $17.92 6/15/20201,080,000 shares $16.19 million -46.5%5.4%6.5 $14.99 TMDX Short Interest - Frequently Asked Questions What is TransMedics Group's current short interest? Short interest is the volume of TransMedics Group shares that have been sold short but have not yet been closed out or covered. As of May 15th, traders have sold 8,100,000 shares of TMDX short. 25.95% of TransMedics Group's shares are currently sold short. Learn More on TransMedics Group's current short interest. What is a good short interest ratio for TransMedics Group? 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. TMDX shares currently have a short interest ratio of 7.0. Learn More on TransMedics Group's short interest ratio. Which institutional investors are shorting TransMedics Group? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of TransMedics Group: Jane Street Group LLC, Cubist Systematic Strategies LLC, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, Arrowpoint Investment Partners Singapore Pte. Ltd., Simplex Trading LLC, Wolverine Asset Management LLC, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for TransMedics Group? 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. 25.95% of TransMedics Group's floating shares are currently sold short. Is TransMedics Group's short interest increasing or decreasing? TransMedics Group saw a decrease in short interest in the month of May. As of May 15th, there was short interest totaling 8,100,000 shares, a decrease of 8.0% from the previous total of 8,800,000 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 TransMedics Group's short interest compare to its competitors? 25.95% of TransMedics Group's shares are currently sold short. Here is how the short interest of companies in the industry of "medical equipment" compare to TransMedics Group: Smith & Nephew plc (0.43%), Solventum Co. (3.33%), Penumbra, Inc. (4.13%), Stevanato Group S.p.A. (5.46%), Glaukos Co. (6.49%), Inari Medical, Inc. (4.24%), iRhythm Technologies, Inc. (8.65%), Bausch + Lomb Co. (7.03%), Inspire Medical Systems, Inc. (11.25%), Soleno Therapeutics, Inc. (9.95%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($29.20 billion), Strategy Incorporated ($10.88 billion), iShares 20+ Year Treasury Bond ETF ($10.04 billion), Capital One Financial Co. ($5.51 billion), Charter Communications, Inc. ($5.00 billion), Super Micro Computer, Inc. ($4.43 billion), Apollo Global Management, Inc. ($4.02 billion), Hims & Hers Health, Inc. ($3.65 billion), VanEck Semiconductor ETF ($3.27 billion), and Coinbase Global, Inc. ($3.10 billion). View all of the most shorted stocks. What does it mean to sell short TransMedics Group stock? Short selling TMDX is an investing strategy that aims to generate trading profit from TransMedics Group as its price is falling. TMDX shares are trading up $1.46 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 TransMedics Group? A short squeeze for TransMedics Group 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 TMDX, which in turn drives the price of the stock up even further. How often is TransMedics Group's 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 TMDX, twice per month. The most recent reporting period available is May, 15 2025. More Short Interest Resources from MarketBeat Related Companies SNN Short Squeeze SOLV Short Squeeze PEN Short Squeeze STVN Short Squeeze GKOS Short Squeeze NARI Short Squeeze IRTC Short Squeeze BLCO Short Squeeze INSP Short Squeeze SLNO 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:TMDX) was last updated on 6/11/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredTrump wipes out trillions overnight…Is there anybody more powerful than Donald Trump right now? In a single tariff announcement, he wiped out n...Porter & Company | SponsoredElon’s NEXT Big IPO?Cancel your internet TODAY!? 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