908 Devices (MASS) Short Interest Ratio & Short Volume $6.61 +0.13 (+2.01%) Closing price 07/2/2025 04:00 PM EasternExtended Trading$6.61 0.00 (0.00%) As of 05:10 AM 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock 908 Devices Short Interest Data908 Devices (MASS) has a short interest of 2.33 million shares, representing 8.87% of the float (the number of shares available for trading by the public). This marks a 6.39% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.7, indicating that it would take 3.7 days of the average trading volume of 1.05 million shares to cover all short positions.Current Short Interest2,330,000 sharesPrevious Short Interest2,190,000 sharesChange Vs. Previous Month+6.39%Dollar Volume Sold Short$17.03 millionShort Interest Ratio3.7 Days to CoverLast Record DateJune 15, 2025Outstanding Shares35,860,000 sharesFloat Size26,260,000 sharesShort Percent of Float8.87%Today's Trading Volume516,494 sharesAverage Trading Volume1,048,037 sharesToday's Volume Vs. Average49% Short Selling 908 Devices? Sign up to receive the latest short interest report for 908 Devices and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartMASS Short Interest Over TimeMASS Days to Cover Over TimeMASS Percentage of Float Shorted Over Time 908 Devices Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/15/20252,330,000 shares $17.03 million +6.4%8.9%3.7 $7.31 5/31/20252,190,000 shares $12.61 million -16.1%8.3%3 $5.76 5/15/20252,610,000 shares $11.80 million -6.1%9.9%0.9 $4.52 4/30/20252,780,000 shares $15.10 million -1.8%10.7%1 $5.43 4/15/20252,830,000 shares $12.59 million +10.6%11.0%1 $4.45 3/31/20252,560,000 shares $11.47 million -10.2%10.0%0.9 $4.48 3/15/20252,850,000 shares $11.71 million +26.7%11.1%1 $4.11 2/28/20252,250,000 shares $5.04 million -1.3%8.7%0.8 $2.24 2/15/20252,280,000 shares $6.34 million +18.1%9.0%3.9 $2.78 1/31/20251,930,000 shares $4.83 million +0.5%7.6%3.1 $2.50 Get the Latest News and Ratings for MASS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for 908 Devices and its competitors with MarketBeat's FREE daily newsletter. 1/15/20251,920,000 shares $5.59 million +16.4%7.6%3.2 $2.91 12/31/20241,650,000 shares $3.63 million +16.2%6.5%5.4 $2.20 12/15/20241,420,000 shares $2.95 million +2.9%5.6%5.5 $2.08 11/30/20241,380,000 shares $3.78 million No Change5.4%6.1 $2.74 11/15/20241,380,000 shares $3.30 million -4.8%5.4%5.8 $2.39 10/31/20241,450,000 shares $4.54 million +5.8%5.7%8.3 $3.13 10/15/20241,370,000 shares $4.71 million +1.5%5.4%7.6 $3.44 9/30/20241,350,000 shares $4.68 million +2.3%5.3%7 $3.47 9/15/20241,320,000 shares $4.75 million +0.8%5.2%6.4 $3.60 8/31/20241,310,000 shares $5.17 million -4.4%5.2%6.1 $3.95 8/15/20241,370,000 shares $5.97 million +1.5%5.4%6.7 $4.36 7/31/20241,350,000 shares $7.68 million -1.5%5.3%5.8 $5.69 7/15/20241,370,000 shares $7.58 million +10.5%5.4%5.7 $5.53 6/30/20241,240,000 shares $6.39 million +6.9%4.9%5.3 $5.15 6/15/20241,160,000 shares $6.74 million +9.4%4.6%5 $5.81 5/31/20241,060,000 shares $6.68 million +1.0%4.3%4.7 $6.30 5/15/20241,050,000 shares $7.60 million -21.6%4.2%4.7 $7.24 4/30/20241,340,000 shares $7.64 million +8.9%5.4%7.6 $5.70 4/15/20241,230,000 shares $7.12 million +7.0%5.2%7.5 $5.79 3/31/20241,150,000 shares $8.68 million +9.5%4.8%6.9 $7.55 3/15/20241,050,000 shares $7.06 million -1.9%4.4%5.8 $6.72 2/29/20241,070,000 shares $7.86 million -6.1%4.6%5.9 $7.35 2/15/20241,140,000 shares $8.80 million -11.6%4.9%6.5 $7.72 1/31/20241,290,000 shares $9.13 million -9.2%5.5%7.2 $7.08 1/15/20241,420,000 shares $11.02 million +2.2%6.1%7.6 $7.76 12/31/20231,390,000 shares $15.60 million +6.1%6.0%7.8 $11.22 12/15/20231,310,000 shares $10.41 million -8.4%5.6%8.1 $7.95 11/30/20231,430,000 shares $11.38 million +1.4%6.1%9.7 $7.96 11/15/20231,410,000 shares $9.15 million +3.7%6.0%9.3 $6.49 10/31/20231,360,000 shares $8.06 million -6.2%5.9%9 $5.93I was wrong about Trump (Ad)I made a mistake. A mistake I feel very foolish about. After speaking with Donald Trump and some of his advisors, I believed him. I believed the promise that he would finally confront the single most dangerous threat to American life. That he would fix the ticking time bomb I’ve been warning about for 15 years. But I was wrong.Let me show you exactly what we’re doing to prepare. 10/15/20231,450,000 shares $8.16 million +8.2%6.2%8.8 $5.63 9/30/20231,340,000 shares $8.92 million +10.7%5.8%7.6 $6.66 9/15/20231,210,000 shares $7.70 million No Change5.2%6.1 $6.36 8/31/20231,210,000 shares $8.70 million -13.0%5.2%5.9 $7.19 8/15/20231,390,000 shares $9.81 million -2.8%6.0%6 $7.06 7/31/20231,430,000 shares $9.95 million -3.4%6.2%5.9 $6.96 7/15/20231,480,000 shares $10.80 million +4.2%6.5%6.6 $7.30 6/30/20231,420,000 shares $9.74 million -3.4%6.2%6.4 $6.86 6/15/20231,470,000 shares $12.76 million -4.6%6.4%6.6 $8.68 5/31/20231,540,000 shares $13.41 million -9.9%6.7%5.9 $8.71 5/15/20231,710,000 shares $12.52 million +0.6%7.5%6.4 $7.32 4/30/20231,700,000 shares $11.49 million -14.1%7.4%6.5 $6.76 4/15/20231,980,000 shares $16.49 million +4.2%8.7%7.6 $8.33 3/31/20231,900,000 shares $16.34 million -15.9%8.4%6.7 $8.60 3/15/20232,260,000 shares $20.20 million +21.5%9.9%7.7 $8.94 2/28/20231,860,000 shares $16.74 million -7.5%8.3%7.1 $9.00 2/15/20232,010,000 shares $20.68 million +12.3%8.9%8 $10.29 1/31/20231,790,000 shares $16.68 million -17.5%8.0%5.8 $9.32 1/15/20232,170,000 shares $19.16 million +1.9%9.7%7 $8.83 12/30/20222,130,000 shares $16.23 million +4.4%9.5%7.1 $7.62 12/15/20222,040,000 shares $17.71 million -3.3%9.1%6.9 $8.68 11/30/20222,110,000 shares $22.58 million -7.9%9.4%7.4 $10.70 11/15/20222,290,000 shares $24.05 million +2.7%10.2%7.7 $10.50 10/31/20222,230,000 shares $35.66 million +2.8%10.0%8.1 $15.99 10/15/20222,170,000 shares $29.79 million -4.0%9.7%7.5 $13.73 9/30/20222,260,000 shares $37.18 million +9.7%10.1%7.5 $16.45 9/15/20222,060,000 shares $34.61 million +10.2%9.2%6.2 $16.80 8/31/20221,870,000 shares $37.68 million +16.9%8.4%5.6 $20.15 8/15/20221,600,000 shares $31.18 million +3.2%8.2%4.8 $19.49 7/31/20221,550,000 shares $34.88 million -2.5%8.0%4.7 $22.50 7/15/20221,590,000 shares $28.22 million +9.7%8.2%5 $17.75 6/30/20221,450,000 shares $29.86 million +14.2%8.6%4.6 $20.59 6/15/20221,270,000 shares $18.44 million -19.6%7.5%4.3 $14.52 5/31/20221,580,000 shares $21.99 million +5.3%9.4%5.3 $13.92 5/15/20221,500,000 shares $24.77 million -17.1%8.9%4.7 $16.51 4/30/20221,810,000 shares $32.13 million +5.2%10.8%6.2 $17.75 4/15/20221,720,000 shares $32.75 million +1.8%10.3%5.7 $19.04 3/31/20221,690,000 shares $32.13 million +14.2%10.2%5.3 $19.01 3/15/20221,480,000 shares $25.06 million +3.5%8.9%4.7 $16.93 2/28/20221,430,000 shares $23.78 million +14.4%8.7%4.6 $16.63 2/15/20221,250,000 shares $19.01 million -22.8%7.6%4.1 $15.21 1/31/20221,620,000 shares $25.63 million +6.6%10.7%5.1 $15.82 1/15/20221,520,000 shares $26.83 million -2.6%10.1%4.9 $17.65 12/31/20211,560,000 shares $40.36 million +4.0%10.3%5.8 $25.87 12/15/20211,500,000 shares $38.52 million +6.4%11.1%5.7 $25.68 11/30/20211,410,000 shares $33.84 million +7.6%11.9%5.3 $24.00 11/15/20211,310,000 shares $40.43 million -40.2%11.1%5 $30.86 10/29/20212,190,000 shares $72.05 million -2.2%18.5%9.6 $32.90 10/15/20212,240,000 shares $71.77 million +2.8%18.7%9.1 $32.04 9/30/20212,180,000 shares $70.89 million +7.4%18.2%8.2 $32.52I was wrong about Trump (Ad)I made a mistake. A mistake I feel very foolish about. After speaking with Donald Trump and some of his advisors, I believed him. I believed the promise that he would finally confront the single most dangerous threat to American life. That he would fix the ticking time bomb I’ve been warning about for 15 years. But I was wrong.Let me show you exactly what we’re doing to prepare. 9/15/20212,030,000 shares $74.60 million +3.6%17.0%7 $36.75 8/31/20211,960,000 shares $70.56 million +1.6%16.7%5.8 $36.00 8/13/20211,930,000 shares $62.36 million +0.5%16.6%6 $32.31 7/30/20211,920,000 shares $60 million -5.0%16.5%5.5 $31.25 7/15/20212,020,000 shares $64.26 million +9.8%17.6%6.2 $31.81 6/30/20211,840,000 shares $71.30 million -31.9%16.0%5.7 $38.75 6/15/20212,700,000 shares $104.52 million +1.1%23.5%9.1 $38.71 5/28/20212,670,000 shares $112.49 million +42.0%23.3%10.7 $42.13 5/14/20211,880,000 shares $69.09 million +32.4%16.4%7 $36.75 4/30/20211,420,000 shares $75.39 million +15.5%12.5%5.7 $53.09 4/15/20211,230,000 shares $62.91 million +44.0%11.5%4.9 $51.15 3/31/2021854,200 shares $38.32 million +44.9%8.8%3.3 $44.86 3/15/2021589,400 shares $32.00 million +270.2%6.4%1.6 $54.29 2/26/2021159,200 shares $8.76 million +72.7%1.7%0.4 $55.00 2/12/202192,200 shares $6.51 million -70.0%1.0%0.2 $70.65 1/29/2021307,100 shares $16.90 million -11.1%3.2%0.7 $55.03 1/15/2021345,300 shares $21.20 million No Change3.6%0.7 $61.41 MASS Short Interest - Frequently Asked Questions What is 908 Devices' current short interest? Short interest is the volume of 908 Devices shares that have been sold short but have not yet been closed out or covered. As of June 15th, traders have sold 2,330,000 shares of MASS short. 8.87% of 908 Devices' shares are currently sold short. Learn More on 908 Devices' current short interest. What is a good short interest ratio for 908 Devices? 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. MASS shares currently have a short interest ratio of 4.0. Learn More on 908 Devices's short interest ratio. Which institutional investors are shorting 908 Devices? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of 908 Devices: Simplex Trading LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for 908 Devices? 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. 8.87% of 908 Devices' floating shares are currently sold short. Is 908 Devices' short interest increasing or decreasing? 908 Devices saw a increase in short interest in the month of June. As of June 15th, there was short interest totaling 2,330,000 shares, an increase of 6.4% from the previous total of 2,190,000 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. What is 908 Devices' float size? 908 Devices currently has issued a total of 35,860,000 shares. Some of 908 Devices' outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. 908 Devices currently has a public float of 26,260,000 shares. How does 908 Devices' short interest compare to its competitors? 8.87% of 908 Devices' shares are currently sold short. Here is how the short interest of companies in the industry of "measuring and control equipment" compare to 908 Devices: Transcat, Inc. (5.13%), Eyepoint Pharmaceuticals, Inc. (10.25%), Allient Inc. (1.93%), Standard BioTools Inc. (4.42%), Cytek Biosciences, Inc. (4.44%), Aehr Test Systems (23.99%), Quantum-Si Incorporated (17.52%), Quanterix Corporation (9.88%), Senseonics Holdings, Inc. (8.14%), Frequency Electronics, Inc. (0.72%), 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 908 Devices stock? Short selling MASS is an investing strategy that aims to generate trading profit from 908 Devices as its price is falling. MASS shares are trading up $0.13 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 908 Devices? A short squeeze for 908 Devices 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 MASS, which in turn drives the price of the stock up even further. How often is 908 Devices' 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 MASS, twice per month. The most recent reporting period available is June, 15 2025. More Short Interest Resources from MarketBeat Related Companies Transcat Short Interest Eyepoint Pharmaceuticals Short Interest Allient Short Interest Standard BioTools Short Interest Cytek Biosciences Short Interest Aehr Test Systems Short Interest Quantum-Si Short Interest Quanterix Short Interest Senseonics Short Interest Frequency Electronics 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:MASS) was last updated on 7/3/2025 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 | SponsoredTrump’s New Order Could Boost Social Security Benefits by 400%If you collect—or plan to collect—Social Security, you need to see this. 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Oxford Economics says, "The Robotics Rev...Weiss Ratings | 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 908 Devices Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share 908 Devices 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. 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