Insmed (INSM) Short Interest Ratio & Short Volume $97.62 -3.02 (-3.00%) Closing price 04:00 PM EasternExtended Trading$97.12 -0.50 (-0.52%) As of 07:59 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 11.65 million shares, representing 6.33% of the float (the number of shares available for trading by the public). This marks a -33.28% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.8, indicating that it would take 3.8 days of the average trading volume of 2.31 million shares to cover all short positions.Current Short Interest11,650,000 sharesPrevious Short Interest17,460,000 sharesChange Vs. Previous Month-33.28%Dollar Volume Sold Short$1.15 billionShort Interest Ratio3.8 Days to CoverLast Record DateJune 15, 2025Outstanding Shares189,710,000 sharesShort Percent of Float6.33%Today's Trading Volume3,833,645 sharesAverage Trading Volume2,306,432 sharesToday's Volume Vs. Average166% 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 6/15/202511,650,000 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 1/31/202514,540,000 shares $1.11 billion -3.6%N/A8.1 $76.58 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. 1/15/202515,090,000 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 $24.90 10/31/202315,440,000 shares $386.93 million +13.4%N/A11.1 $25.06"I'm risking my reputation on this" (Ad)Behind closed doors, away from the mainstream media's eyes, the smartest minds in crypto are all seeing the same signals. They're positioning themselves for something unprecedented. And after 17 million podcast downloads and over 600 insider interviews, I finally connected all the dots… What I discovered was so explosive, so potentially life-changing, that I had to put it all in a book.Claim your FREE copy of Crypto Revolution now. 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 $26.49 9/30/20218,820,000 shares $242.90 million +1.5%7.9%11.4 $27.54"I'm risking my reputation on this" (Ad)Behind closed doors, away from the mainstream media's eyes, the smartest minds in crypto are all seeing the same signals. They're positioning themselves for something unprecedented. And after 17 million podcast downloads and over 600 insider interviews, I finally connected all the dots… What I discovered was so explosive, so potentially life-changing, that I had to put it all in a book.Claim your FREE copy of Crypto Revolution now. 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 7/15/202013,670,000 shares $374.56 million -2.7%N/A12.4 $27.40 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 15th, traders have sold 11,650,000 shares of INSM short. 6.33% 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 4.0. 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. 6.33% of Insmed's floating shares are currently sold short. Is Insmed's short interest increasing or decreasing? Insmed saw a decrease in short interest in the month of June. As of June 15th, there was short interest totaling 11,650,000 shares, a decrease of 33.3% from the previous total of 17,460,000 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? 6.33% of Insmed's shares are currently sold short. Here is how the short interest of companies in the industry of "med - biomed/gene" compare to Insmed: GSK PLC Sponsored ADR (0.82%), Regeneron Pharmaceuticals, Inc. (1.95%), Alnylam Pharmaceuticals, Inc. (2.63%), argenex SE (3.39%), BioNTech SE Sponsored ADR (2.58%), Royalty Pharma PLC (8.74%), Biogen Inc. (2.32%), Illumina, Inc. (4.09%), Genmab A/S Sponsored ADR (0.36%), Incyte Corporation (4.29%), 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 ($69.26 billion), Invesco QQQ ($25.22 billion), iShares Russell 2000 ETF ($20.33 billion), iShares 20+ Year Treasury Bond ETF ($9.99 billion), MicroStrategy Incorporated ($9.12 billion), Canadian Natural Resources Limited ($6.73 billion), SPDR S&P Biotech ETF ($6.52 billion), Invesco S&P 500 Equal Weight ETF ($5.60 billion), Financial Select Sector SPDR Fund ($4.64 billion), and iShares iBoxx $ Investment Grade Corporate Bond ETF ($4.59 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 down $2.32 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, 15 2025. More Short Interest Resources from MarketBeat Related Companies GSK Short Interest REGN Short Interest ALNY Short Interest ARGX Short Interest BNTX Short Interest RPRX Short Interest BIIB Short Interest ILMN Short Interest GMAB Short Interest INCY 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 7/1/2025 by MarketBeat.com Staff From Our PartnersHere's the last trade you should make before heading out for the weekend tomorrow.Make this one trade at 2:59 PM on Friday afternoon, and you'll thank me on Monday morning.Timothy Sykes | SponsoredThis Signal Only Flashes Once Every 4 Years – And It Just TriggeredThis same signal has appeared twice before in the past 8 years — both times, it kicked off major moves in cryp...Crypto Swap Profits | SponsoredThis Crypto Is Set to Explode in JanuaryFree summit: How to profit from the Coinbase-Deribit deal Our hedge fund experts know exactly what this mea...Crypto 101 Media | SponsoredTrump set to Boost Social Security Checks by 400%?If you collect—or plan to collect—Social Security, you need to see this. A new initiative tied to President...InvestorPlace | SponsoredThe Trump Dump is starting; Get out of stocks now?The first 365 days of the Trump presidency… Will be the best time to get rich in American history.Paradigm Press | SponsoredThe $15 Gold Fund That Pays Up to $1,152/MonthGold prices are breaking records. But while everyone else is fixated on headlines… They're missing somet...Investors Alley | SponsoredThe $7 company helping Nvidia build the world’s first trillion-dollar robot …Michael Robinson has been at the forefront of the technology market for over 40 years. Spotting some profit...Weiss Ratings | SponsoredGold Shock (insane new prediction)World Gold Council reports: "No sign" of this catalyst slowing A whopping 73% of Americans report they're "...Stansberry Research | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added ten stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding Insmed, Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share Insmed With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. Stay informed with MarketBeat's real-time news. Export data to Excel for personal analysis. Sign in to your free account to enjoy these benefits In-depth profiles and analysis for 20,000 public companies. Real-time analyst ratings, insider transactions, earnings data, and more. Our daily ratings and market update email newsletter. Sign in to your free account to enjoy all that MarketBeat has to offer. Sign In Create Account Your Email Address: Email Address Required Your Password: Password Required Log In or Sign in with Facebook Sign in with Google Forgot your password? Your Email Address: Please enter your email address. Please enter a valid email address Choose a Password: Please enter your password. Your password must be at least 8 characters long and contain at least 1 number, 1 letter, and 1 special character. Create My Account (Free) or Sign in with Facebook Sign in with Google By creating a free account, you agree to our terms of service. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
