Select Medical (SEM) Short Interest Ratio & Short Volume $13.06 +0.01 (+0.04%) Closing price 03:59 PM EasternExtended Trading$13.04 -0.02 (-0.15%) As of 04:11 PM 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Select Medical Short Interest DataSelect Medical (SEM) has a short interest of 3.13 million shares, representing 2.97% of the float (the number of shares available for trading by the public). This marks a 5.74% increase in short interest from the previous month. The short interest ratio (days to cover) is 2.5, indicating that it would take 2.5 days of the average trading volume of 1.13 million shares to cover all short positions.Current Short Interest3,130,000 sharesPrevious Short Interest2,960,000 sharesChange Vs. Previous Month+5.74%Dollar Volume Sold Short$46.47 millionShort Interest Ratio2.5 Days to CoverLast Record DateJuly 31, 2025Outstanding Shares123,990,000 sharesFloat Size105,410,000 sharesShort Percent of Float2.97%Today's Trading Volume909,044 sharesAverage Trading Volume1,133,687 sharesToday's Volume Vs. Average80% Short Selling Select Medical? Sign up to receive the latest short interest report for Select Medical and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartSEM Short Interest Over TimeSEM Days to Cover Over TimeSEM Percentage of Float Shorted Over Time Select Medical Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/31/20253,130,000 shares $46.47 million +5.7%3.0%2.5 $14.85 7/15/20252,960,000 shares $43.25 million -2.3%2.7%2.2 $14.61 6/30/20253,030,000 shares $46.03 million -9.0%2.8%2.3 $15.19 6/15/20253,330,000 shares $50.12 million -23.1%3.0%2.6 $15.05 5/31/20254,330,000 shares $66.34 million +4.3%3.9%3.6 $15.32 5/15/20254,150,000 shares $63.04 million +8.4%3.8%3.3 $15.19 4/30/20253,830,000 shares $69.94 million -9.0%3.5%3.2 $18.26 4/15/20254,210,000 shares $68.56 million -3.2%3.8%4.3 $16.29 3/31/20254,350,000 shares $72.62 million +10.4%4.0%4.5 $16.70 3/15/20253,940,000 shares $66.13 million -11.9%3.6%3.9 $16.79 Get the Latest News and Ratings for SEM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Select Medical and its competitors with MarketBeat's FREE daily newsletter. 2/28/20254,470,000 shares $81.31 million +17.3%4.1%4.3 $18.19 2/15/20253,810,000 shares $70.80 million +6.1%3.5%3.3 $18.58 1/31/20253,590,000 shares $70.58 million +12.5%3.3%3.3 $19.66 1/15/20253,190,000 shares $61.47 million -2.2%3.0%3 $19.27 12/31/20243,260,000 shares $61.45 million +28.9%3.1%3.2 $18.85 12/15/20242,530,000 shares $49.28 million +28.4%2.4%2.7 $19.48 11/30/20241,970,000 shares $41.59 million +10.1%1.9%2.4 $21.11 11/15/20241,790,000 shares $67.04 million -11.0%1.7%2.9 $37.45 10/31/20242,010,000 shares $64.34 million -7.8%2.0%3.6 $32.01 10/15/20242,180,000 shares $73.67 million -7.2%2.1%3.7 $33.80 9/30/20242,350,000 shares $81.94 million -10.3%2.3%3.7 $34.87 9/15/20242,620,000 shares $92.30 million +4.4%2.6%3.7 $35.23 8/31/20242,510,000 shares $90.54 million -0.4%2.5%3.6 $36.07 8/15/20242,520,000 shares $83.71 million -2.3%2.5%3.6 $33.22 7/31/20242,580,000 shares $102.50 million -1.5%2.5%3.7 $39.73 7/15/20242,620,000 shares $98.51 million +13.9%2.6%4.2 $37.60 6/30/20242,300,000 shares $80.64 million +7.0%2.3%3.8 $35.06 6/15/20242,150,000 shares $72.71 million +3.9%2.1%4 $33.82 5/31/20242,070,000 shares $71.52 million -2.4%2.0%3.9 $34.55 5/15/20242,120,000 shares $74.03 million -0.9%2.1%3.8 $34.92 4/30/20242,140,000 shares $60.69 million -6.1%2.1%3.9 $28.36 4/15/20242,280,000 shares $62.86 million +2.7%2.3%4.6 $27.57 3/31/20242,220,000 shares $66.93 million -11.9%2.2%4.3 $30.15 3/15/20242,520,000 shares $71.74 million -8.4%2.5%4.4 $28.47 2/29/20242,750,000 shares $74.91 million -1.1%2.7%4.6 $27.24 2/15/20242,780,000 shares $75.57 million -3.8%2.7%4.6 $27.19 1/31/20242,890,000 shares $75.08 million -12.2%2.9%4.9 $25.98 1/15/20243,290,000 shares $86.89 million -5.5%3.3%5 $26.41 12/31/20233,480,000 shares $81.78 million -6.0%3.4%5.3 $23.50 12/15/20233,700,000 shares $87.47 million +16.0%3.7%6.4 $23.64Out of 18,347 Cryptocurrencies... This is the ONLY One (Ad)The Single Most Undervalued DeFi Protocol You've Never Heard Of If there's one cryptocurrency you should buy in this market, this token might just be it.Get the whole story on this "crypto market unicorn" right here. 11/30/20233,190,000 shares $72.06 million +24.1%3.2%5.6 $22.59 11/15/20232,570,000 shares $59.62 million +0.4%2.5%4.7 $23.20 10/31/20232,560,000 shares $58.21 million -2.3%2.5%4.8 $22.74 10/15/20232,620,000 shares $60.71 million -3.3%2.6%5.3 $23.17 9/30/20232,710,000 shares $68.48 million +3.4%2.7%5.4 $25.27 9/15/20232,620,000 shares $67.78 million +0.8%2.6%5.2 $25.87 8/31/20232,600,000 shares $75.95 million -24.6%2.5%4.8 $29.21 8/15/20233,450,000 shares $98.01 million +8.8%3.3%6.3 $28.41 7/31/20233,170,000 shares $95.07 million -7.6%3.1%5.4 $29.99 7/15/20233,430,000 shares $102.21 million -12.1%3.3%5.5 $29.80 6/30/20233,900,000 shares $124.25 million -18.1%3.7%6.6 $31.86 6/15/20234,760,000 shares $137.90 million -4.2%4.6%8.4 $28.97 5/31/20234,970,000 shares $136.03 million +11.4%4.8%9.3 $27.37 5/15/20234,460,000 shares $126.00 million -14.2%4.3%7.7 $28.25 4/30/20235,200,000 shares $158.60 million -16.9%5.0%9.2 $30.50 4/15/20236,260,000 shares $176.97 million +0.2%6.0%12.7 $28.27 3/31/20236,250,000 shares $161.56 million -1.4%6.0%12.9 $25.85 3/15/20236,340,000 shares $158.82 million +3.1%6.1%12.7 $25.05 2/28/20236,150,000 shares $167.22 million -7.8%6.0%12.1 $27.19 2/15/20236,670,000 shares $199.43 million -0.3%6.5%14.1 $29.90 1/31/20236,690,000 shares $194.48 million +2.3%6.5%13.4 $29.07 1/15/20236,540,000 shares $187.04 million -0.5%6.4%11.1 $28.60 12/30/20226,570,000 shares $163.13 million -13.4%6.4%10.6 $24.83 12/15/20227,590,000 shares $186.64 million -3.2%7.4%11.7 $24.59 11/30/20227,840,000 shares $192.71 million -6.6%7.7%12.6 $24.58 11/15/20228,390,000 shares $206.23 million +11.0%8.2%13 $24.58 10/31/20227,560,000 shares $194.14 million +13.2%7.4%11.8 $25.68 10/15/20226,680,000 shares $146.56 million +4.9%6.6%11.1 $21.94 9/30/20226,370,000 shares $140.78 million No Change6.3%11.2 $22.10 9/15/20226,370,000 shares $163.58 million +1.1%6.3%10.2 $25.68 8/31/20226,300,000 shares $161.53 million -12.4%6.2%9.3 $25.64 8/15/20227,190,000 shares $199.38 million +32.2%7.0%10.3 $27.73 7/31/20225,440,000 shares $161.13 million -4.6%5.2%6.8 $29.62 7/15/20225,700,000 shares $150.48 million +7.6%5.4%6.9 $26.40 6/30/20225,300,000 shares $125.19 million +3.9%5.0%6.4 $23.62 6/15/20225,100,000 shares $117.66 million -3.0%4.8%5.9 $23.07 5/31/20225,260,000 shares $128.08 million -7.2%4.9%6.3 $24.35 5/15/20225,670,000 shares $146.29 million -3.4%5.3%6.6 $25.80 4/30/20225,870,000 shares $132.72 million +7.1%5.4%7.3 $22.61 4/15/20225,480,000 shares $135.08 million +7.9%5.1%6.9 $24.65 3/31/20225,080,000 shares $121.87 million -5.2%4.7%5.8 $23.99 3/15/20225,360,000 shares $130.14 million -0.6%4.9%6.5 $24.28 2/28/20225,390,000 shares $124.78 million +4.1%5.0%6.6 $23.15 2/15/20225,180,000 shares $124.89 million +43.5%4.8%6.4 $24.11 1/31/20223,610,000 shares $83.86 million +48.0%3.3%4.5 $23.23 1/15/20222,440,000 shares $70.56 million +0.8%2.2%3.2 $28.92 12/31/20212,420,000 shares $71.15 million +9.0%2.2%3.6 $29.40 12/15/20212,220,000 shares $65.60 million +5.7%2.0%3.4 $29.55 11/30/20212,100,000 shares $56.39 million +14.1%1.9%3.3 $26.85 11/15/20211,840,000 shares $61.62 million -20.7%1.7%2.9 $33.49The stealth altcoin the financial world is underestimating (Ad)This DeFi project could soar next When altcoin season fully kicks in—which the data suggests is happening RIGHT NOW—this project is poised to see massive moves.... The smart money is already positioning.Discover the protocol that's quietly replacing traditional finance. 10/29/20212,320,000 shares $77.07 million -15.3%2.1%3.6 $33.22 10/15/20212,740,000 shares $91.68 million -7.1%2.5%4.2 $33.46 9/30/20212,950,000 shares $106.70 million -16.4%2.7%4.4 $36.17 9/15/20213,530,000 shares $122.31 million +10.7%3.2%5.1 $34.65 8/31/20213,190,000 shares $110.28 million +32.9%2.9%4.3 $34.57 8/13/20212,400,000 shares $84.79 million -21.1%2.2%3.3 $35.33 7/30/20213,040,000 shares $119.93 million -2.9%2.7%4 $39.45 7/15/20213,130,000 shares $122.29 million -3.1%2.8%4.1 $39.07 6/30/20213,230,000 shares $136.50 million -15.5%2.9%4.2 $42.26 6/15/20213,820,000 shares $163.00 million -1.3%3.4%5.1 $42.67 5/28/20213,870,000 shares $155.07 million +38.7%3.5%5.6 $40.07 5/14/20212,790,000 shares $103.45 million -17.2%2.5%3.5 $37.08 4/30/20213,370,000 shares $128.03 million -1.2%3.1%4.7 $37.99 4/15/20213,410,000 shares $118.19 million +25.4%3.1%5 $34.66 3/31/20212,720,000 shares $92.78 million -10.5%2.5%4.1 $34.11 3/15/20213,040,000 shares $105.21 million +3.1%2.8%4.6 $34.61 2/26/20212,950,000 shares $78.82 million +0.3%2.7%5.3 $26.72 2/12/20212,940,000 shares $81.14 million +12.2%2.7%6.4 $27.60 1/29/20212,620,000 shares $70.82 million +4.0%2.4%5.6 $27.03 1/15/20212,520,000 shares $73.48 million -6.0%2.3%5.1 $29.16 12/31/20202,680,000 shares $73.51 million +13.1%2.5%5.6 $27.43 12/15/20202,370,000 shares $60.53 million -3.3%2.2%5.1 $25.54 11/30/20202,450,000 shares $60.39 million +9.4%2.3%4.8 $24.65 11/15/20202,240,000 shares $55.13 million -11.5%2.1%4.4 $24.61 10/30/20202,530,000 shares $55.81 million +1.6%2.3%4.9 $22.06 10/15/20202,490,000 shares $55.78 million +5.5%2.3%4.4 $22.40 9/30/20202,360,000 shares $49.14 million -0.4%2.2%3.9 $20.82 9/15/20202,370,000 shares $47.59 million -4.1%2.2%3.6 $20.08 8/31/20202,470,000 shares $49.57 million +2.1%2.3%3.7 $20.07 SEM Short Interest - Frequently Asked Questions What is Select Medical's current short interest? Short interest is the volume of Select Medical shares that have been sold short but have not yet been covered or closed out. As of July 31st, traders have sold 3,130,000 shares of SEM short. 2.97% of Select Medical's shares are currently sold short. Learn More on Select Medical's current short interest. What is a good short interest ratio for Select Medical? 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. SEM shares currently have a short interest ratio of 2.0. Learn More on Select Medical's short interest ratio. What is a good short interest percentage for Select Medical? 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. 2.97% of Select Medical's floating shares are currently sold short. Is Select Medical's short interest increasing or decreasing? Select Medical saw a increase in short interest in the month of July. As of July 31st, there was short interest totaling 3,130,000 shares, an increase of 5.7% from the previous total of 2,960,000 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. What is Select Medical's float size? Select Medical currently has issued a total of 123,990,000 shares. Some of Select Medical's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. Select Medical currently has a public float of 105,410,000 shares. How does Select Medical's short interest compare to its competitors? 2.97% of Select Medical's shares are currently sold short. Here is how the short interest of companies compare to Select Medical: atai Life Sciences N.V. (11.56%), Acadia Healthcare Company, Inc. (11.56%), Brookdale Senior Living Inc. (4.29%), U.S. Physical Therapy, Inc. (4.83%), Petco Health and Wellness Company, Inc. (13.98%), Community Health Systems, Inc. (11.58%), HCA Healthcare, Inc. (2.44%), Alcon (1.44%), Tenet Healthcare Corporation (3.54%), Encompass Health Corporation (0.98%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: SPDR S&P 500 ETF Trust ($70.87 billion), Invesco QQQ ($30.12 billion), iShares Russell 2000 ETF ($19.85 billion), iShares 20+ Year Treasury Bond ETF ($10.34 billion), Strategy Inc ($8.98 billion), iShares iBoxx $ Investment Grade Corporate Bond ETF ($7.61 billion), SPDR S&P Biotech ETF ($6.81 billion), Invesco S&P 500 Equal Weight ETF ($6.14 billion), Palo Alto Networks, Inc. ($5.97 billion), and Super Micro Computer, Inc. ($5.28 billion). View all of the most shorted stocks. What does it mean to sell short Select Medical stock? Short selling SEM is an investing strategy that aims to generate trading profit from Select Medical as its price is falling. SEM shares are trading up $0.01 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 Select Medical? A short squeeze for Select Medical 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 SEM, which in turn drives the price of the stock up even further. How often is Select Medical'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 SEM, twice per month. The most recent reporting period available is July, 31 2025. More Short Interest Resources from MarketBeat Related Companies ATAI Short Interest Data ACHC Short Interest Data BKD Short Interest Data USPH Short Interest Data WOOF Short Interest Data CYH Short Interest Data HCA Short Interest Data ALC Short Interest Data THC Short Interest Data EHC Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:SEM) was last updated on 8/28/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredEveryone’s watching Nvidia right now. 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