Merus (MRUS) Short Interest Ratio & Short Volume $54.99 -0.63 (-1.13%) Closing price 07/15/2025 04:00 PM EasternExtended Trading$55.02 +0.03 (+0.06%) As of 07/15/2025 05:06 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 ForecastsChartCompetitorsEarningsFDA EventsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Merus Short Interest DataMerus (MRUS) has a short interest of 5.14 million shares, representing 7.78% of the float (the number of shares available for trading by the public). This marks a 2.80% increase in short interest from the previous month. The short interest ratio (days to cover) is 4.5, indicating that it would take 4.5 days of the average trading volume of 732,228 shares to cover all short positions.Current Short Interest5,140,000 sharesPrevious Short Interest5,000,000 sharesChange Vs. Previous Month+2.80%Dollar Volume Sold Short$270.36 millionShort Interest Ratio4.5 Days to CoverLast Record DateJune 30, 2025Outstanding Shares69,214,000 sharesShort Percent of Float7.78%Today's Trading Volume495,475 sharesAverage Trading Volume732,228 sharesToday's Volume Vs. Average68% Short Selling Merus? Sign up to receive the latest short interest report for Merus and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartMRUS Short Interest Over TimeMRUS Days to Cover Over TimeMRUS Percentage of Float Shorted Over Time Merus Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20255,140,000 shares $270.36 million +2.8%7.8%4.5 $52.60 6/15/20255,000,000 shares $273.05 million +7.5%7.6%4.1 $54.61 5/31/20254,650,000 shares $258.96 million -18.0%7.1%4 $55.69 5/15/20255,670,000 shares $227.25 million -3.9%8.7%5.8 $40.08 4/30/20255,900,000 shares $268.51 million -5.9%N/A7.8 $45.51 4/15/20256,270,000 shares $270.99 million -15.5%9.6%8.9 $43.22 3/31/20257,420,000 shares $312.31 million -7.9%11.4%10.5 $42.09 3/15/20258,060,000 shares $379.63 million +8.8%12.3%12.9 $47.10 2/28/20257,410,000 shares $348.94 million +11.6%11.3%11.6 $47.09 2/15/20256,640,000 shares $266.93 million -13.5%10.2%10.5 $40.20 Get the Latest News and Ratings for MRUS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Merus and its competitors with MarketBeat's FREE daily newsletter. 1/31/20257,680,000 shares $314.42 million -4.0%N/A12.9 $40.94 1/15/20258,000,000 shares $314.72 million -3.2%N/A13.7 $39.34 12/31/20248,260,000 shares $347.33 million -15.5%N/A15.3 $42.05 12/15/20249,780,000 shares $418.88 million +12.2%N/A17.8 $42.83 11/30/20248,720,000 shares $391.00 million -0.5%N/A16.2 $44.84 11/15/20248,760,000 shares $408.04 million +1.2%N/A17.1 $46.58 10/31/20248,660,000 shares $432.39 million -2.2%N/A19.2 $49.93 10/15/20248,850,000 shares $454.45 million -0.5%N/A17.5 $51.35 9/30/20248,890,000 shares $444.14 million +25.0%N/A15.7 $49.96 9/15/20247,110,000 shares $356.50 million +7.2%N/A11.3 $50.14 8/31/20246,630,000 shares $338.06 million -7.3%N/A10.2 $50.99 8/15/20247,150,000 shares $368.80 million +2.4%N/A7.4 $51.58 7/31/20246,980,000 shares $370.22 million -1.4%N/A6.7 $53.04 7/15/20247,080,000 shares $411.35 million -2.3%N/A6.7 $58.10 6/30/20247,250,000 shares $428.98 million +6.0%N/A7.1 $59.17 6/15/20246,840,000 shares $386.80 million +45.2%N/A7.2 $56.55 5/31/20244,710,000 shares $250.76 million +35.3%N/A5 $53.24 5/15/20243,480,000 shares $157.33 million +3.0%N/A4.6 $45.21 4/30/20243,380,000 shares $151.80 million +2.7%N/A5.3 $44.91 4/15/20243,290,000 shares $135.78 million -4.4%N/A5.7 $41.27 3/31/20243,440,000 shares $154.90 million -16.1%N/A5.8 $45.03 3/15/20244,100,000 shares $179.99 million -8.1%N/A7.1 $43.90 2/29/20244,460,000 shares $216.22 million -6.1%N/A8 $48.48 2/15/20244,750,000 shares $206.48 million +2.4%N/A8.9 $43.47 1/31/20244,640,000 shares $165.56 million -1.1%N/A10 $35.68 1/15/20244,690,000 shares $152.85 million -14.4%N/A10.3 $32.59 12/31/20235,480,000 shares $150.70 million -2.3%N/A12.7 $27.50 12/15/20235,610,000 shares $141.60 million -12.5%N/A13.1 $25.24 11/30/20236,410,000 shares $158.58 million -2.3%N/A15.9 $24.74 11/15/20236,560,000 shares $157.24 million +0.3%N/A19.1 $23.97The 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. 10/31/20236,540,000 shares $131.52 million +28.0%N/A17.8 $20.11 10/15/20235,110,000 shares $107.82 million +9.9%N/A15.3 $21.10 9/30/20234,650,000 shares $109.65 million +8.1%N/A16.7 $23.58 9/15/20234,300,000 shares $104.79 million +0.2%N/A17.2 $24.37 8/31/20234,290,000 shares $95.97 million +5.7%N/A16.8 $22.37 8/15/20234,060,000 shares $87.66 million -2.2%N/A16.4 $21.59 7/31/20234,150,000 shares $108.90 million -2.8%N/A14.9 $26.24 7/15/20234,270,000 shares $116.53 million -4.5%11.9%13.5 $27.29 6/30/20234,470,000 shares $117.70 million -8.2%12.4%10.2 $26.33 6/15/20234,870,000 shares $129.88 million -1.4%13.5%10.4 $26.67 5/31/20234,940,000 shares $107.30 million +1.4%13.7%11 $21.72 5/15/20234,870,000 shares $102.08 million +7.5%13.5%10.7 $20.96 4/30/20234,530,000 shares $86.89 million +42.9%12.5%10.6 $19.18 4/15/20233,170,000 shares $68.95 million +6.0%8.8%7.8 $21.75 3/31/20232,990,000 shares $55.02 million +4.9%8.3%10.5 $18.40 3/15/20232,850,000 shares $57.80 million +2.9%7.8%11.9 $20.28 2/28/20232,770,000 shares $52.82 million -1.1%7.6%11.9 $19.07 2/15/20232,800,000 shares $52.11 million -2.8%7.7%12.8 $18.61 1/31/20232,880,000 shares $44.93 million -3.4%7.8%12.7 $15.60 1/15/20232,980,000 shares $45.98 million -1.3%N/A10.2 $15.43 12/30/20223,020,000 shares $46.72 million +13.5%N/A9.9 $15.47 12/15/20222,660,000 shares $35.32 million -4.0%N/A8.3 $13.28 11/30/20222,770,000 shares $42.52 million -3.5%N/A8.3 $15.35 11/15/20222,870,000 shares $52.61 million -1.7%N/A8.7 $18.33 10/31/20222,920,000 shares $59.86 million -1.0%8.4%8.9 $20.50 10/15/20222,950,000 shares $64.90 million +7.3%8.6%11.9 $22.00 9/30/20222,750,000 shares $55.08 million +10.0%8.0%10.5 $20.03 9/15/20222,500,000 shares $59.15 million +2.5%7.3%8.4 $23.66 8/31/20222,440,000 shares $57.78 million +0.8%7.2%8.7 $23.68 8/15/20222,420,000 shares $62.24 million -21.7%7.2%6.8 $25.72 7/31/20223,090,000 shares $74.72 million -9.9%9.6%8.4 $24.18 7/15/20223,430,000 shares $93.91 million -11.4%10.7%9 $27.38 6/30/20223,870,000 shares $87.62 million -1.8%12.0%10.3 $22.64 6/15/20223,940,000 shares $77.70 million -5.1%12.2%11.4 $19.72 5/31/20224,150,000 shares $77.02 million +11.0%12.9%14.2 $18.56 5/15/20223,740,000 shares $59.73 million +20.3%11.6%17.5 $15.97 4/30/20223,110,000 shares $63.44 million +15.2%9.7%16.9 $20.40 4/15/20222,700,000 shares $70.63 million +0.4%8.4%17.1 $26.16 3/31/20222,690,000 shares $71.12 million -1.8%8.4%18.5 $26.44 3/15/20222,740,000 shares $71.79 million +10.9%8.6%17.6 $26.20 2/28/20222,470,000 shares $69.38 million +1.2%7.7%12.9 $28.09 2/15/20222,440,000 shares $65.49 million -1.6%7.8%12.4 $26.84 1/31/20222,480,000 shares $61.03 million +1.6%8.6%11.4 $24.61 1/15/20222,440,000 shares $69.44 million +2.5%7.2%9.8 $28.46 12/31/20212,380,000 shares $75.68 million +5.3%7.2%8.4 $31.80 12/15/20212,260,000 shares $68.91 million +2.3%6.9%4.1 $30.49 11/30/20212,210,000 shares $57.48 million -7.1%6.7%4.2 $26.01 11/15/20212,380,000 shares $70.59 million -7.8%7.3%4.7 $29.66 10/29/20212,580,000 shares $72.37 million -0.8%8.4%5.1 $28.05 10/15/20212,600,000 shares $80.31 million +23.8%8.5%5.2 $30.89The 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. 9/30/20212,100,000 shares $46.20 million -1.9%6.9%4.5 $22.00 9/15/20212,140,000 shares $54.70 million -5.3%7.0%9.1 $25.56 8/31/20212,260,000 shares $58.94 million -16.0%7.4%9.4 $26.08 8/13/20212,690,000 shares $52.72 million +26.3%8.8%9.7 $19.60 7/30/20212,130,000 shares $36.64 million +2.9%7.2%7.4 $17.20 7/15/20212,070,000 shares $35.42 million +24.7%7.1%8.1 $17.11 6/30/20211,660,000 shares $34.98 million +16.9%5.7%6.8 $21.07 6/15/20211,420,000 shares $30.39 million +7.6%4.8%7.3 $21.40 5/28/20211,320,000 shares $27.92 million +41.7%4.5%6.9 $21.15 5/14/2021931,400 shares $20.49 million +2.8%N/A6.1 $22.00 4/30/2021906,500 shares $19.66 million +6.2%N/A7.6 $21.69 4/15/2021853,600 shares $19.82 million +0.6%N/A5.7 $23.22 3/31/2021848,900 shares $17.17 million +15.7%N/A4.6 $20.23 3/15/2021733,800 shares $16.81 million +7.8%N/A4.3 $22.91 2/26/2021680,900 shares $13.96 million -1.0%N/A4.3 $20.50 2/12/2021687,400 shares $16.39 million -2.3%N/A3.7 $23.84 1/29/2021703,500 shares $18.73 million +67.8%N/A3.9 $26.62 1/15/2021419,300 shares $9.60 million +1.2%N/A2.6 $22.89 12/31/2020414,400 shares $7.30 million -6.2%2.2%3.4 $17.61 12/15/2020441,900 shares $7.45 million -1.3%2.3%4.1 $16.87 11/30/2020447,700 shares $7.39 million +53.0%2.3%3.9 $16.50 11/15/2020292,600 shares $3.84 million -5.1%1.5%3 $13.14 10/30/2020308,400 shares $3.98 million +40.5%1.6%4.3 $12.89 10/15/2020219,500 shares $2.95 million -7.9%1.2%3.2 $13.44 9/30/2020238,200 shares $2.86 million +13.9%1.2%3.9 $12.00 9/15/2020209,200 shares $2.56 million -16.4%1.1%3 $12.25 8/31/2020250,200 shares $3.02 million -9.1%1.3%3.5 $12.07 8/14/2020275,100 shares $3.54 million -1.6%1.4%2.5 $12.87 7/31/2020279,700 shares $3.83 million +8.4%1.5%2.4 $13.69 MRUS Short Interest - Frequently Asked Questions What is Merus' current short interest? Short interest is the volume of Merus shares that have been sold short but have not yet been closed out or covered. As of June 30th, traders have sold 5,140,000 shares of MRUS short. 7.78% of Merus' shares are currently sold short. Learn More on Merus' current short interest. What is a good short interest ratio for Merus? 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. MRUS shares currently have a short interest ratio of 4.0. Learn More on Merus's short interest ratio. Which institutional investors are shorting Merus? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Merus: Jane Street Group LLC, and Caption Management LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Merus? 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. 7.78% of Merus' floating shares are currently sold short. Is Merus' short interest increasing or decreasing? Merus saw a increase in short interest during the month of June. As of June 30th, there was short interest totaling 5,140,000 shares, an increase of 2.8% from the previous total of 5,000,000 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 Merus' short interest compare to its competitors? 7.78% of Merus' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Merus: Intra-Cellular Therapies, Inc. (2.58%), Genmab A/S Sponsored ADR (0.28%), Dr. Reddy's Laboratories Ltd (1.34%), Moderna, Inc. (19.15%), Regencell Bioscience Holdings Limited (4.03%), Viatris Inc. (3.51%), Ascendis Pharma A/S (6.16%), QIAGEN N.V. (2.51%), Blueprint Medicines Corporation (5.95%), BridgeBio Pharma, Inc. (14.05%), 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 Merus stock? Short selling MRUS is an investing strategy that aims to generate trading profit from Merus as its price is falling. MRUS shares are trading down $0.63 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. How does a short squeeze work against Merus? A short squeeze for Merus 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 MRUS, which in turn drives the price of the stock up even further. How often is Merus' 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 MRUS, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies Intra-Cellular Therapies Short Interest Data Genmab A/S Short Interest Data Dr. Reddy's Laboratories Short Interest Data Moderna Short Interest Data Regencell Bioscience Short Interest Data Viatris Short Interest Data Ascendis Pharma A/S Short Interest Data QIAGEN Short Interest Data Blueprint Medicines Short Interest Data BridgeBio Pharma 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 (NASDAQ:MRUS) was last updated on 7/16/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredCentral Banks Are Hoarding Gold – Should You?The AI boom isn’t just transforming technology—it’s redefining global power, increasing government debt, and u...Lear Capital | SponsoredThe Robotics Revolution has arrived … and one $7 stock could take off as a result.Something big is brewing in Washington. 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