Merus (MRUS) Short Interest Ratio & Short Volume $63.77 -0.83 (-1.28%) Closing price 04:00 PM EasternExtended Trading$63.72 -0.05 (-0.09%) As of 06:08 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 4.54 million shares. This marks a -11.67% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.9, indicating that it would take 3.9 days of the average trading volume of 697,373 shares to cover all short positions.Current Short Interest4,540,000 sharesPrevious Short Interest5,140,000 sharesChange Vs. Previous Month-11.67%Dollar Volume Sold Short$249.65 millionShort Interest Ratio3.9 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares75,634,000 sharesPercentage of Shares Shorted6.00%Today's Trading Volume584,380 sharesAverage Trading Volume697,373 sharesToday's Volume Vs. Average84% 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 7/15/20254,540,000 shares $249.65 million -11.7%N/A3.9 $54.99 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 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. 2/15/20256,640,000 shares $266.93 million -13.5%10.2%10.5 $40.20 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 $24.74Elon Musk: “Nothing happens without this…” (Ad)Lithium has fueled the EV boom, but another resource is even more critical. Without it, over 20 million electric vehicles could fail to reach production—and the AI revolution could stall. After a year of research, one small-cap stock has emerged as the top contender to benefit from a looming supply crunch.See the Element 29 stock poised for a potential 3,500% windfall 11/15/20236,560,000 shares $157.24 million +0.3%N/A19.1 $23.97 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 $28.05Elon Musk: “Nothing happens without this…” (Ad)Lithium has fueled the EV boom, but another resource is even more critical. Without it, over 20 million electric vehicles could fail to reach production—and the AI revolution could stall. After a year of research, one small-cap stock has emerged as the top contender to benefit from a looming supply crunch.See the Element 29 stock poised for a potential 3,500% windfall 10/15/20212,600,000 shares $80.31 million +23.8%8.5%5.2 $30.89 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 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 July 15th, investors have sold 4,540,000 shares of MRUS 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. Is Merus' short interest increasing or decreasing? Merus saw a decline in short interest in the month of July. As of July 15th, there was short interest totaling 4,540,000 shares, a decline of 11.7% from the previous total of 5,140,000 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? Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Merus: Teva Pharmaceutical Industries Ltd. (4.66%), Genmab A/S Sponsored ADR (0.60%), Dr. Reddy's Laboratories Ltd (1.46%), Ascendis Pharma A/S (4.46%), Qiagen N.V. (2.93%), Moderna, Inc. (19.34%), Viatris Inc. (3.32%), BridgeBio Pharma, Inc. (10.19%), Verona Pharma PLC American Depositary Share (4.77%), Blueprint Medicines Corporation (5.95%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 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 $0.83 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 increases 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 July, 15 2025. More Short Interest Resources from MarketBeat Related Companies Teva Pharmaceutical Industries Short Interest Data Genmab A/S Short Interest Data Dr. Reddy's Laboratories Short Interest Data Ascendis Pharma A/S Short Interest Data Qiagen Short Interest Data Moderna Short Interest Data Viatris Short Interest Data BridgeBio Pharma Short Interest Data Verona Pharma PLC American Depositary Share Short Interest Data Blueprint Medicines 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 8/12/2025 by MarketBeat.com Staff From Our PartnersWhat's the Best Way to Lower RMD Taxes?Turning 73 triggers a key IRS rule: you must begin taking required minimum distributions (RMDs) from certain r...SmartAsset | SponsoredAltucher: It Looks Like My Trump prediction is coming trueNew Hampshire just launched a Strategic Crypto Reserve — and James Altucher says it’s the first sign that “Tru...Paradigm Press | SponsoredThis New Rule Could Change EverythingA new rule taking effect this September has Big Banks shifting billions into one asset they now treat like cas...American Alternative | SponsoredElon Musk: “Nothing happens without this…”Lithium has fueled the EV boom, but another resource is even more critical. 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