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TransMedics Group (TMDX) Short Interest Ratio & Short Volume

TransMedics Group logo
$70.59 -0.54 (-0.75%)
As of 11:38 AM Eastern
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TransMedics Group Short Interest Overview

As of June 30, 2026, TransMedics Group (TMDX) had a short interest of 7.87 million shares sold short, representing 24.45% of the public float. This marks a 2.40% increase in short interest since the prior report. The short interest ratio (days to cover) is 6.0, meaning it would take 6.0 days of the average trading volume of 1.07 million shares to cover all short positions.

Current Short Interest
7,865,697 shares
Previous Short Interest
7,680,998 shares
Change Vs. Previous Month
2.40%
Dollar Volume Sold Short
$522.44 million
Short Interest Ratio
6.0 Days to Cover
Last Record Date
June 30, 2026
Outstanding Shares
34,560,000 shares
Short Percent of Float
24.45%
Today's Trading Volume
198,233 shares
Average Trading Volume
1,072,239 shares
Today's Volume Vs. Average
18%
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Short Interest ChartDays to Cover ChartShort Percent of Float Chart

TMDX Short Interest Over Time

TMDX Days to Cover Over Time

TMDX Percentage of Float Shorted Over Time

TransMedics Group Tesla Short Interest History & Recent Changes

Export
Report DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date
6/30/20267,865,697 shares $522.44 million +2.4%24.4%6.04 $66.42
6/15/20267,680,998 shares $579.76 million +4.4%23.9%7.21 $75.48
5/29/20267,356,977 shares $494.39 million -10.0%22.9%5.32 $67.20
5/15/20268,178,039 shares $516.85 million -1.7%25.4%3.38 $63.20
4/30/20268,319,639 shares $838.54 million +9.4%25.9%8.61 $100.79
4/15/20267,606,337 shares $883.17 million -5.3%23.6%10.27 $116.11
2/13/20268,225,157 shares $1.07 billion +4.2%25.6%14.13 $129.84
11/14/20256,860,927 shares $789.08 million -9.0%21.6%8.72 $115.01
10/31/20257,542,390 shares $992.13 million -5.4%23.7%6.54 $131.54
10/15/20257,970,000 shares $897.50 million -2.1%25.1%7.7 $112.61
9/30/20258,140,000 shares $913.31 million -3.0%N/A7.5 $112.20
9/15/20258,390,000 shares $958.89 million +1.5%N/A7.9 $114.29
8/31/20258,270,000 shares $950.72 million +5.5%26.1%7.9 $114.96
8/15/20257,840,000 shares $999.99 million +2.2%N/A7.8 $127.55
7/31/20257,670,000 shares $912.50 million -4.1%24.2%6.8 $118.97
7/15/20258,000,000 shares $925.44 million -0.5%N/A7.9 $115.68
6/30/20258,040,000 shares $1.08 billion +2.3%25.6%7.9 $134.01
6/15/20257,860,000 shares $1.12 billion -2.7%25.0%7.4 $142.88
5/31/20258,080,000 shares $1.03 billion -0.3%25.9%7.8 $127.94
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
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
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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 $54.75
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
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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 $32.68
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

TMDX Short Interest - Frequently Asked Questions

Short interest is the volume of TransMedics Group shares that have been sold short but have not yet been covered or closed out. As of June 30th, investors have sold 7,865,697 shares of TMDX short. 24.45% of TransMedics Group's shares are currently sold short. Learn More on TransMedics Group's 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. TMDX shares currently have a short interest ratio of 6.0. Learn More on TransMedics Group'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. 24.45% of TransMedics Group's floating shares are currently sold short.

TransMedics Group saw a increase in short interest during the month of June. As of June 30th, there was short interest totaling 7,865,697 shares, an increase of 2.4% from the previous total of 7,680,998 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.

24.45% 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: Glaukos Corporation (8.05%), Liquidia Corporation (19.92%), Stevanato Group S.p.A. (0.31%), Bausch + Lomb Corporation (1.13%), LivaNova PLC (7.20%), MiniMed Group Inc (2.34%), Envista Holdings Corporation (6.11%), iRhythm Technologies (9.95%), Warby Parker Inc. (19.89%), Establishment Labs Holdings Inc. (18.00%),

As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($82.01 billion), Invesco QQQ ($47.15 billion), iShares Russell 2000 ETF ($24.07 billion), Nebius Group N.V. ($16.85 billion), Western Digital Corporation ($14.29 billion), SPDR S&P Biotech ETF ($11.89 billion), VanEck Semiconductor ETF ($11.29 billion), KLA Corporation ($10.37 billion), iShares 20+ Year Treasury Bond ETF ($8.78 billion), and Lumentum Holdings Inc. ($8.29 billion). View all of the most shorted stocks.

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 down $1.63 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 TransMedics Group 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 TMDX, 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 TMDX, twice per month. The most recent reporting period available is June, 30 2026.

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

  • 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

This page (NASDAQ:TMDX) was last updated on 7/10/2026 by MarketBeat.com Staff.
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