Insmed (INSM) Short Interest Ratio & Short Volume $103.92 +0.40 (+0.39%) As of 03:42 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Insmed Short Interest DataInsmed (INSM) has a short interest of 9.80 million shares, representing 5.33% of the float (the number of shares available for trading by the public). This marks a -15.88% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.7, indicating that it would take 2.7 days of the average trading volume of 2.76 million shares to cover all short positions.Current Short Interest9,800,000 sharesPrevious Short Interest11,650,000 sharesChange Vs. Previous Month-15.88%Dollar Volume Sold Short$986.27 millionShort Interest Ratio2.7 Days to CoverLast Record DateJune 30, 2025Outstanding Shares189,710,000 sharesShort Percent of Float5.33%Today's Trading Volume947,686 sharesAverage Trading Volume2,757,676 sharesToday's Volume Vs. Average34% Short Selling Insmed? Sign up to receive the latest short interest report for Insmed and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartINSM Short Interest Over TimeINSM Days to Cover Over TimeINSM Percentage of Float Shorted Over Time Insmed Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20259,800,000 shares $986.27 million -15.9%5.3%2.7 $100.64 6/15/202511,650,000 shares $1.15 billion -33.3%6.3%3.8 $98.73 5/31/202517,460,000 shares $1.22 billion +6.0%10.2%7 $69.97 5/15/202516,470,000 shares $1.11 billion +4.4%9.7%7.4 $67.22 4/30/202515,780,000 shares $1.14 billion +4.4%N/A7.2 $72.00 4/15/202515,120,000 shares $1.07 billion +4.3%8.9%7.1 $71.07 3/31/202514,500,000 shares $1.11 billion +0.2%8.5%7.3 $76.29 3/15/202514,470,000 shares $1.11 billion -1.0%8.5%7.8 $76.55 2/28/202514,620,000 shares $1.19 billion +1.1%8.6%7.6 $81.55 2/15/202514,460,000 shares $1.15 billion -0.6%8.5%7.9 $79.31 Get the Latest News and Ratings for INSM and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Insmed and its competitors with MarketBeat's FREE daily newsletter. 1/31/202514,540,000 shares $1.11 billion -3.6%N/A8.1 $76.58 1/15/202515,090,000 shares $1.06 billion -2.3%N/A8.8 $70.20 12/31/202415,440,000 shares $1.07 billion +18.7%N/A10 $69.04 12/15/202413,010,000 shares $931.91 million +3.1%N/A8.5 $71.63 11/30/202412,620,000 shares $948.52 million +4.3%N/A8.3 $75.16 11/15/202412,100,000 shares $802.11 million -12.6%N/A7.8 $66.29 10/31/202413,850,000 shares $931.83 million +1.1%N/A8.1 $67.28 10/15/202413,700,000 shares $1.02 billion +3.8%N/A7.8 $74.66 9/30/202413,200,000 shares $963.60 million +8.0%N/A6.7 $73.00 9/15/202412,220,000 shares $912.35 million -0.1%N/A5.4 $74.66 8/31/202412,230,000 shares $935.23 million -9.4%N/A4.9 $76.47 8/15/202413,500,000 shares $1.00 billion -1.4%N/A3.7 $74.14 7/31/202413,690,000 shares $995.95 million -7.9%N/A3.9 $72.75 7/15/202414,870,000 shares $1.15 billion +15.9%N/A4.2 $77.47 6/30/202412,830,000 shares $859.61 million +10.9%N/A3.7 $67.00 6/15/202411,570,000 shares $739.55 million +6.5%N/A3.5 $63.92 5/31/202410,860,000 shares $597.84 million +9.4%N/A3.6 $55.05 5/15/20249,930,000 shares $247.55 million +16.4%N/A5.6 $24.93 4/30/20248,530,000 shares $210.86 million -9.3%N/A4.8 $24.72 4/15/20249,400,000 shares $252.11 million +4.0%N/A5.5 $26.82 3/31/20249,040,000 shares $245.26 million +2.3%N/A5.4 $27.13 3/15/20248,840,000 shares $227.36 million +3.2%N/A5.5 $25.72 2/29/20248,570,000 shares $237.56 million -7.2%N/A5 $27.72 2/15/20249,230,000 shares $265.36 million -11.2%N/A5.4 $28.75 1/31/202410,390,000 shares $288.84 million +9.1%N/A6.6 $27.80 1/15/20249,520,000 shares $270.94 million -7.8%N/A6 $28.46 12/31/202310,320,000 shares $319.82 million -14.9%N/A7 $30.99 12/15/202312,130,000 shares $344.73 million No ChangeN/A8.5 $28.42 11/30/202312,130,000 shares $303.49 million -14.4%N/A9 $25.02 11/15/202314,170,000 shares $352.83 million -8.2%N/A10.1 $24.90The 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. 10/31/202315,440,000 shares $386.93 million +13.4%N/A11.1 $25.06 10/15/202313,620,000 shares $337.23 million +6.4%N/A9.7 $24.76 9/30/202312,800,000 shares $323.20 million -6.4%N/A9.5 $25.25 9/15/202313,680,000 shares $364.02 million +10.0%N/A10.6 $26.61 8/31/202312,440,000 shares $272.31 million +11.9%N/A10.1 $21.89 8/15/202311,120,000 shares $250.31 million +9.1%N/A10.4 $22.51 7/31/202310,190,000 shares $225.10 million +5.6%N/A9.8 $22.09 7/15/20239,650,000 shares $198.79 million +7.7%N/A9.8 $20.60 6/30/20238,960,000 shares $189.06 million -4.6%N/A9 $21.10 6/15/20239,390,000 shares $187.89 million +4.2%N/A8.9 $20.01 5/31/20239,010,000 shares $171.46 million -2.7%N/A8.1 $19.03 5/15/20239,260,000 shares $178.44 million +1.7%N/A7.8 $19.27 4/30/20239,110,000 shares $177.65 million -8.2%N/A7.5 $19.50 4/15/20239,920,000 shares $166.16 million -6.7%N/A8.3 $16.75 3/31/202310,630,000 shares $181.24 million -3.7%N/A8.6 $17.05 3/15/202311,040,000 shares $197.28 million +6.0%N/A8.6 $17.87 2/28/202310,420,000 shares $212.36 million -2.5%N/A8 $20.38 2/15/202310,690,000 shares $218.18 million -6.4%N/A8.2 $20.41 1/31/202311,420,000 shares $245.87 million +6.0%N/A8.6 $21.53 1/15/202310,770,000 shares $209.48 million +0.8%N/A6.9 $19.45 12/30/202210,690,000 shares $213.59 million +16.1%N/A6.9 $19.98 12/15/20229,210,000 shares $179.23 million +16.9%N/A6.4 $19.46 11/30/20227,880,000 shares $145.70 million +6.1%N/A5.7 $18.49 11/15/20227,430,000 shares $140.35 million -4.3%N/A5.4 $18.89 10/31/20227,760,000 shares $134.40 million -10.3%N/A5.7 $17.32 10/15/20228,650,000 shares $179.06 million +0.5%N/A6.5 $20.70 9/30/20228,610,000 shares $185.46 million +7.2%N/A7.7 $21.54 9/15/20228,030,000 shares $194.17 million +22.6%N/A6.9 $24.18 8/31/20226,550,000 shares $161.26 million -3.3%N/A5.6 $24.62 8/15/20226,770,000 shares $185.50 million -5.8%N/A5.9 $27.40 7/31/20227,190,000 shares $159.04 million -20.6%N/A5.9 $22.12 7/15/20229,060,000 shares $209.56 million -17.4%N/A7.8 $23.13 6/30/202210,970,000 shares $216.33 million -4.1%N/A9.6 $19.72 6/15/202211,440,000 shares $203.63 million +4.9%15.6%10.1 $17.80 5/31/202210,910,000 shares $205.33 million -0.9%N/A10.2 $18.82 5/15/202211,010,000 shares $200.27 million -2.6%N/A10.3 $18.19 4/30/202211,300,000 shares $248.26 million +0.9%N/A11.4 $21.97 4/15/202211,200,000 shares $287.28 million +10.0%N/A11.7 $25.65 3/31/202210,180,000 shares $239.23 million +1.4%N/A10.8 $23.50 3/15/202210,040,000 shares $218.77 million -2.1%N/A11.5 $21.79 2/28/202210,260,000 shares $245.21 million +2.9%N/A11.7 $23.90 2/15/20229,970,000 shares $242.17 million +9.0%N/A11.7 $24.29 1/31/20229,150,000 shares $207.52 million +29.8%N/A11.5 $22.68 1/15/20227,050,000 shares $167.30 million -0.3%N/A9.2 $23.73 12/31/20217,070,000 shares $192.59 million -4.6%N/A9.4 $27.24 12/15/20217,410,000 shares $207.70 million +3.6%N/A9.2 $28.03 11/30/20217,150,000 shares $196.77 million -0.4%N/A8.6 $27.52 11/15/20217,180,000 shares $218.99 million -3.8%N/A8.8 $30.50 10/29/20217,460,000 shares $224.92 million -18.7%N/A9.2 $30.15 10/15/20219,180,000 shares $243.18 million +4.1%8.2%11.8 $26.49The 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. 9/30/20218,820,000 shares $242.90 million +1.5%7.9%11.4 $27.54 9/15/20218,690,000 shares $240.19 million -15.8%7.8%12.2 $27.64 8/31/202110,320,000 shares $289.37 million +7.1%9.3%13.4 $28.04 8/13/20219,640,000 shares $227.12 million +5.5%8.7%11.9 $23.56 7/30/20219,140,000 shares $224.84 million +12.7%8.2%7.7 $24.60 7/15/20218,110,000 shares $222.94 million -1.5%7.4%6.9 $27.49 6/30/20218,230,000 shares $234.23 million +0.9%7.5%7.2 $28.46 6/15/20218,160,000 shares $239.17 million +5.4%7.4%6.9 $29.31 5/28/20217,740,000 shares $190.40 million -5.8%7.1%6.1 $24.60 5/14/20218,220,000 shares $209.45 million +7.0%N/A6.4 $25.48 4/30/20217,680,000 shares $268.03 million -12.1%N/A6.7 $34.90 4/15/20218,740,000 shares $288.59 million -0.6%N/A9.3 $33.02 3/31/20218,790,000 shares $283.74 million +2.5%N/A9 $32.28 3/15/20218,580,000 shares $335.56 million +6.7%N/A8.8 $39.11 2/26/20218,040,000 shares $298.77 million +0.3%N/A9.2 $37.16 2/12/20218,020,000 shares $323.53 million -5.1%N/A9.7 $40.34 1/29/20218,450,000 shares $316.62 million -6.9%N/A10 $37.47 1/15/20219,080,000 shares $339.32 million -1.0%N/A10.3 $37.37 12/31/20209,170,000 shares $311.60 million -4.3%N/A10.9 $33.98 12/15/20209,580,000 shares $382.29 million -7.7%N/A11.4 $39.91 11/30/202010,380,000 shares $413.12 million -9.7%N/A12 $39.80 11/15/202011,500,000 shares $415.61 million +5.8%N/A13.5 $36.14 10/30/202010,870,000 shares $344.25 million -7.3%N/A13 $31.67 10/15/202011,730,000 shares $415.24 million +4.0%N/A14.9 $35.40 9/30/202011,280,000 shares $362.54 million -2.8%N/A14.3 $32.14 9/15/202011,600,000 shares $378.97 million -0.2%N/A13.9 $32.67 8/31/202011,620,000 shares $327.57 million -6.4%N/A14.5 $28.19 8/14/202012,420,000 shares $330.62 million -5.6%N/A14.4 $26.62 7/31/202013,160,000 shares $343.74 million -3.7%N/A14.2 $26.12 INSM Short Interest - Frequently Asked Questions What is Insmed's current short interest? Short interest is the volume of Insmed shares that have been sold short but have not yet been closed out or covered. As of June 30th, investors have sold 9,800,000 shares of INSM short. 5.33% of Insmed's shares are currently sold short. Learn More on Insmed's current short interest. What is a good short interest ratio for Insmed? 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. INSM shares currently have a short interest ratio of 3.0. Learn More on Insmed's short interest ratio. Which institutional investors are shorting Insmed? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Insmed: Quaker Wealth Management LLC, Jane Street Group LLC, Parallax Volatility Advisers L.P., Caption Management LLC, Twin Tree Management LP, HAP Trading LLC, Walleye Trading LLC, Walleye Capital LLC, Garda Capital Partners LP, Simplex Trading LLC, and Jefferies Financial Group Inc.. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Insmed? 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. 5.33% of Insmed's floating shares are currently sold short. Is Insmed's short interest increasing or decreasing? Insmed saw a decline in short interest in June. As of June 30th, there was short interest totaling 9,800,000 shares, a decline of 15.9% from the previous total of 11,650,000 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 Insmed's short interest compare to its competitors? 5.33% of Insmed's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Insmed: Takeda Pharmaceutical Co. (0.16%), argenex SE (3.31%), BioNTech SE Sponsored ADR (2.65%), Summit Therapeutics PLC (24.12%), Teva Pharmaceutical Industries Ltd. (3.49%), Intra-Cellular Therapies, Inc. (2.58%), Genmab A/S Sponsored ADR (0.28%), Moderna, Inc. (19.15%), Dr. Reddy's Laboratories Ltd (1.34%), Viatris Inc. (3.51%), 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 ($72.10 billion), Invesco QQQ ($26.89 billion), iShares Russell 2000 ETF ($19.61 billion), MicroStrategy Incorporated ($9.52 billion), iShares 20+ Year Treasury Bond ETF ($8.70 billion), WD-40 Company ($7.66 billion), Technology Select Sector SPDR Fund ($6.10 billion), Invesco S&P 500 Equal Weight ETF ($5.80 billion), Invesco S&P 500 Top 50 ETF ($5.53 billion), and Vanguard Large-Cap ETF ($5.35 billion). View all of the most shorted stocks. What does it mean to sell short Insmed stock? Short selling INSM is an investing strategy that aims to generate trading profit from Insmed as its price is falling. INSM shares are trading up $0.08 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 Insmed? A short squeeze for Insmed 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 INSM, which in turn drives the price of the stock up even further. How often is Insmed'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 INSM, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies TAK Short Interest ARGX Short Interest BNTX Short Interest SMMT Short Interest TEVA Short Interest ITCI Short Interest GMAB Short Interest MRNA Short Interest RDY Short Interest VTRS Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:INSM) was last updated on 7/25/2025 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 | SponsoredYour Bank Account Is No Longer SafeWhat If Washington Declared That: YOUR Money ISN'T Actually Yours? 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