Insmed (INSM) Short Interest Ratio & Short Volume $90.93 +20.25 (+28.65%) Closing price 04:00 PM EasternExtended Trading$94.35 +3.42 (+3.76%) As of 08:00 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Insmed Short Interest DataInsmed (INSM) has a short interest of 16.47 million shares, representing 9.65% of the float (the number of shares available for trading by the public). This marks a 4.37% increase in short interest from the previous month. The short interest ratio (days to cover) is 7.4, indicating that it would take 7.4 days of the average trading volume of 2.12 million shares to cover all short positions.Current Short Interest16,470,000 sharesPrevious Short Interest15,780,000 sharesChange Vs. Previous Month+4.37%Dollar Volume Sold Short$1.11 billionShort Interest Ratio7.4 Days to CoverLast Record DateMay 15, 2025Outstanding Shares182,139,000 sharesShort Percent of Float9.65%Today's Trading Volume15,641,664 sharesAverage Trading Volume2,117,401 sharesToday's Volume Vs. Average739% 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 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 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 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. 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 $24.90 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 $25.25The Robotics Revolution has arrived … and one $7 stock could take off as a result. 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However, it's impact on the US economy and society will be FAR greater than anything we ever imagined.This little-known company holds nearly 100 patents and trades for around $7 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 $26.49 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 $28.04Trump’s Secret Weapon (Ad)The Trump-Elon War Could Trigger an Economic Collapse - Here's Your Only Safe Exit This isn't just a war of words. 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When two of the most powerful men in America go to war, the economy loses.Click here to get your FREE Presidential Transition Guide now 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 7/15/202013,670,000 shares $374.56 million -2.7%N/A12.4 $27.40 6/30/202014,050,000 shares $377.38 million +3.1%N/A12.2 $26.86 6/15/202013,630,000 shares $386.96 million +0.7%N/A11.2 $28.39 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 covered or closed out. As of May 15th, traders have sold 16,470,000 shares of INSM short. 9.65% 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 7.0. 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. 9.65% of Insmed's floating shares are currently sold short. Is Insmed's short interest increasing or decreasing? Insmed saw a increase in short interest in the month of May. As of May 15th, there was short interest totaling 16,470,000 shares, an increase of 4.4% from the previous total of 15,780,000 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? 9.65% of Insmed's shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical preparations" compare to Insmed: Takeda Pharmaceutical Company Limited (0.20%), Alnylam Pharmaceuticals, Inc. (2.89%), Teva Pharmaceutical Industries Limited (3.43%), Royalty Pharma plc (6.23%), United Therapeutics Co. (4.77%), Intra-Cellular Therapies, Inc. (2.58%), Genmab A/S (0.45%), Summit Therapeutics Inc. (29.82%), Dr. Reddy's Laboratories Limited (1.83%), BioMarin Pharmaceutical Inc. (2.38%), 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 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 $20.25 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 increases 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 May, 15 2025. More Short Interest Resources from MarketBeat Related Companies TAK Short Interest ALNY Short Interest TEVA Short Interest RPRX Short Interest UTHR Short Interest ITCI Short Interest GMAB Short Interest SMMT Short Interest RDY Short Interest BMRN 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 6/10/2025 by MarketBeat.com Staff From Our PartnersBanks aren’t ready for this altcoin—are you?Urgent Crypto Market Alert The last time we saw this pattern, early investors made fortunes...Crypto 101 Media | SponsoredTrump’s Exec Order #14154 could be a “Millionaire-Maker”Former Presidential Advisor, Jim Rickards, says Trump could “rewire our economy and hand millions of Americans...Paradigm Press | SponsoredAn AI run of epic proportions is only getting startedI just put together an urgent new presentation that you need to see right away. 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