Harvard Bioscience (HBIO) Short Interest Ratio & Short Volume $0.43 -0.01 (-3.17%) Closing price 04:00 PM EasternExtended Trading$0.44 +0.01 (+1.25%) As of 07:50 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 ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Harvard Bioscience Short Interest DataHarvard Bioscience (HBIO) has a short interest of 1.63 million shares, representing 4.36% of the float (the number of shares available for trading by the public). This marks a -42.40% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.1, indicating that it would take 0.1 days of the average trading volume of 3.16 million shares to cover all short positions.Current Short Interest1,630,000 sharesPrevious Short Interest2,830,000 sharesChange Vs. Previous Month-42.40%Dollar Volume Sold Short$723.39 thousandShort Interest Ratio0.1 Days to CoverLast Record DateJune 30, 2025Outstanding Shares44,214,000 sharesFloat Size37,410,000 sharesShort Percent of Float4.36%Today's Trading Volume693,491 sharesAverage Trading Volume3,161,009 sharesToday's Volume Vs. Average22% Short Selling Harvard Bioscience? Sign up to receive the latest short interest report for Harvard Bioscience and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartHBIO Short Interest Over TimeHBIO Days to Cover Over TimeHBIO Percentage of Float Shorted Over Time Harvard Bioscience Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20251,630,000 shares $723.39 thousand -42.4%4.4%0.1 $0.44 6/15/20252,830,000 shares $1.44 million -57.4%7.6%0.2 $0.51 5/31/20256,640,000 shares $3.13 million +238.8%17.8%0.6 $0.47 5/15/20251,960,000 shares $694.82 thousand +53.1%5.2%3.2 $0.35 4/30/20251,280,000 shares $456.06 thousand +20.8%3.4%3.6 $0.36 4/15/20251,060,000 shares $418.70 thousand +1.0%2.8%3.1 $0.40 3/31/20251,050,000 shares $594.30 thousand No Change2.8%3.1 $0.57 3/15/20251,050,000 shares $680.30 thousand +8.9%2.8%3.5 $0.65 2/28/2025964,400 shares $813.47 thousand +6.4%2.6%3.9 $0.84 2/15/2025906,600 shares $1.22 million +19.5%2.4%3.8 $1.35 Get the Latest News and Ratings for HBIO and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Harvard Bioscience and its competitors with MarketBeat's FREE daily newsletter. 1/31/2025758,600 shares $1.30 million -3.4%N/A3.5 $1.71 1/15/2025785,100 shares $1.55 million +20.0%N/A4 $1.98 12/31/2024654,400 shares $1.38 million +22.8%N/A3.9 $2.11 12/15/2024533,100 shares $1.15 million +18.4%N/A3.5 $2.16 11/30/2024450,100 shares $990.22 thousand +20.3%N/A3.1 $2.20 11/15/2024374,100 shares $800.57 thousand -6.2%N/A2.7 $2.14 10/31/2024398,900 shares $937.42 thousand +13.8%N/A3.4 $2.35 10/15/2024350,600 shares $858.97 thousand +11.4%N/A3.2 $2.45 9/30/2024314,700 shares $846.54 thousand -26.7%N/A2.8 $2.69 9/15/2024429,100 shares $1.24 million +0.6%N/A3.3 $2.88 8/31/2024426,600 shares $1.23 million -0.1%1.1%2.9 $2.88 8/15/2024426,800 shares $1.22 million -4.4%1.1%2.8 $2.86 7/31/2024446,500 shares $1.43 million +3.7%1.1%3 $3.20 7/15/2024430,700 shares $1.43 million -19.4%1.1%2.8 $3.32 6/30/2024534,400 shares $1.52 million +38.4%1.3%3.6 $2.85 6/15/2024386,200 shares $1.12 million -16.3%1.0%3.1 $2.90 5/31/2024461,500 shares $1.46 million -25.6%N/A3.9 $3.17 5/15/2024620,100 shares $2.14 million -9.0%N/A6.5 $3.45 4/30/2024681,200 shares $2.60 million +1.2%N/A7.5 $3.82 4/15/2024673,000 shares $2.99 million +5.7%N/A7.7 $4.44 3/31/2024636,700 shares $2.70 million -11.2%N/A7.6 $4.24 3/15/2024716,600 shares $2.90 million +0.5%N/A8.5 $4.05 2/29/2024712,900 shares $3.09 million -3.4%1.8%8.4 $4.33 2/15/2024738,300 shares $3.59 million -6.5%1.9%8.5 $4.86 1/31/2024789,400 shares $3.47 million -8.8%2.0%9.1 $4.40 1/15/2024865,500 shares $4.24 million -4.8%2.2%9.9 $4.90 12/31/2023909,500 shares $4.87 million +3.1%2.3%10.6 $5.35 12/15/2023881,900 shares $4.32 million -7.6%2.2%10.1 $4.90 11/30/2023954,600 shares $4.07 million -10.8%2.4%10.7 $4.26 11/15/20231,070,000 shares $4.55 million +5.9%2.7%11.8 $4.25Which Gold Miner Trades at 30% of NAV? The One Buffett Wants (Ad)Some of the world’s best gold developers are trading at just 30% of NAV — like buying a dollar for 30 cents. With gold at record highs and Bridgewater now buying in, one analyst believes Buffett’s next move could hit by August 15th. He’s identified the gold miner that fits Buffett’s profile — plus four smaller plays with even more upside.Get the name of Buffett’s likely gold target here 10/31/20231,010,000 shares $4.43 million -2.9%2.6%9.6 $4.39 10/15/20231,040,000 shares $4.31 million -1.0%2.6%8.4 $4.14 9/30/20231,050,000 shares $4.52 million +13.0%2.7%7.7 $4.30 9/15/2023928,900 shares $4.23 million -3.7%2.3%5.8 $4.55 8/31/2023964,800 shares $4.25 million -1.9%2.4%3.7 $4.41 8/15/2023983,800 shares $4.17 million +0.6%2.5%3.5 $4.24 7/31/2023978,300 shares $4.55 million -4.1%2.5%3.3 $4.65 7/15/20231,020,000 shares $5.57 million -1.9%2.6%3.3 $5.46 6/30/20231,040,000 shares $5.71 million +221.3%2.7%3.2 $5.49 6/15/2023323,700 shares $1.76 million -16.5%0.8%1 $5.44 5/31/2023387,500 shares $2.17 million +0.2%1.0%1.8 $5.59 5/15/2023386,700 shares $2.06 million +10.9%1.0%2.2 $5.34 4/30/2023348,800 shares $2.00 million +28.1%1.0%2.3 $5.72 4/15/2023272,200 shares $1.34 million -7.6%0.8%2.5 $4.93 3/31/2023294,700 shares $1.24 million +14.9%0.8%3.1 $4.20 3/15/2023256,400 shares $676.90 thousand -1.8%0.7%2.4 $2.64 2/28/2023261,100 shares $738.91 thousand -1.3%0.7%2.3 $2.83 2/15/2023264,500 shares $812.02 thousand +1.7%0.7%2.3 $3.07 1/31/2023260,000 shares $774.80 thousand -2.1%0.7%1.9 $2.98 1/15/2023265,600 shares $778.21 thousand -32.6%0.7%1.9 $2.93 12/30/2022394,100 shares $1.09 million +22.9%1.1%2.8 $2.77 12/15/2022320,600 shares $769.44 thousand +9.4%0.9%2.1 $2.40 11/30/2022293,200 shares $750.59 thousand +5.6%0.8%2.6 $2.56 11/15/2022277,700 shares $666.48 thousand +8.1%0.8%2.6 $2.40 10/31/2022256,800 shares $690.79 thousand -6.3%0.7%2.4 $2.69 10/15/2022274,100 shares $619.47 thousand +2.5%0.8%2.3 $2.26 9/30/2022267,400 shares $684.54 thousand +3.6%0.7%2.1 $2.56 9/15/2022258,200 shares $800.42 thousand -5.6%0.7%1.3 $3.10 8/31/2022273,500 shares $902.55 thousand -5.8%0.8%1.2 $3.30 8/15/2022290,300 shares $937.67 thousand -8.0%0.8%1.1 $3.23 7/31/2022315,400 shares $1.19 million -13.8%0.9%1.1 $3.76 7/15/2022365,700 shares $1.33 million -21.2%1.0%1.2 $3.65 6/30/2022464,000 shares $1.67 million -72.1%1.4%1.5 $3.60 6/15/20221,660,000 shares $6.09 million +5.7%5.1%5.3 $3.67 5/31/20221,570,000 shares $5.75 million -1.3%4.3%7.1 $3.66 5/15/20221,590,000 shares $6.01 million +30.3%4.4%8.1 $3.78 4/30/20221,220,000 shares $6.37 million +11.9%3.3%6.7 $5.22 4/15/20221,090,000 shares $6.41 million +1.9%3.0%7.1 $5.88 3/31/20221,070,000 shares $6.64 million +7.0%2.9%7 $6.21 3/15/2022999,600 shares $5.89 million +24.6%2.7%6.6 $5.89 2/28/2022802,600 shares $4.33 million +2.7%2.2%5 $5.40 2/15/2022781,500 shares $4.29 million +20.1%2.1%4.9 $5.49 1/31/2022650,700 shares $3.79 million +9.4%1.8%4.2 $5.82 1/15/2022594,700 shares $3.60 million -2.1%N/A0 $6.06 12/31/2021607,700 shares $4.28 million +19.5%1.7%3.8 $7.05 12/15/2021508,500 shares $3.53 million -0.3%1.4%3 $6.94 11/30/2021509,900 shares $3.41 million +0.5%1.4%3.2 $6.69 11/15/2021507,200 shares $3.94 million -16.4%1.4%3.1 $7.77 10/29/2021606,400 shares $4.57 million +5.6%1.7%3.4 $7.53 10/15/2021574,000 shares $3.93 million -10.9%1.6%3.2 $6.84Which Gold Miner Trades at 30% of NAV? The One Buffett Wants (Ad)Some of the world’s best gold developers are trading at just 30% of NAV — like buying a dollar for 30 cents. With gold at record highs and Bridgewater now buying in, one analyst believes Buffett’s next move could hit by August 15th. He’s identified the gold miner that fits Buffett’s profile — plus four smaller plays with even more upside.Get the name of Buffett’s likely gold target here 9/30/2021644,000 shares $4.50 million -5.1%1.8%3.5 $6.98 9/15/2021678,300 shares $5.32 million +0.6%1.9%3.2 $7.84 8/31/2021674,400 shares $5.57 million +1.7%1.9%3.1 $8.26 8/13/2021663,300 shares $5.61 million +2.7%1.8%2.9 $8.46 7/30/2021646,200 shares $5.10 million -9.6%1.8%2.7 $7.89 7/15/2021715,100 shares $5.44 million +7.4%2.0%2.8 $7.61 6/30/2021665,800 shares $5.55 million -3.2%1.9%2.5 $8.33 6/15/2021688,000 shares $5.19 million -16.9%1.9%2.8 $7.55 5/28/2021828,000 shares $5.80 million -4.1%2.3%2.8 $7.00 5/14/2021863,600 shares $5.98 million +8.2%2.4%3.1 $6.92 4/30/2021798,200 shares $5.75 million -16.3%2.2%3.1 $7.20 4/15/2021953,700 shares $6.33 million +16.8%2.7%4.2 $6.64 3/31/2021816,500 shares $4.44 million +21.9%2.3%3.7 $5.44 3/15/2021669,800 shares $4.30 million +0.7%1.9%3.4 $6.42 2/26/2021665,100 shares $2.88 million +4.6%2.0%5.2 $4.33 2/12/2021636,100 shares $2.98 million -1.8%1.8%5.3 $4.69 1/29/2021647,900 shares $2.93 million +5.5%1.9%5 $4.52 1/15/2021614,300 shares $2.55 million -0.1%1.8%4.7 $4.15 12/31/2020615,000 shares $2.63 million +5.2%1.8%5.2 $4.27 12/15/2020584,400 shares $2.48 million -7.7%1.7%4.9 $4.24 11/30/2020632,900 shares $2.45 million -11.1%1.8%5.3 $3.87 11/15/2020711,600 shares $2.88 million -44.8%2.1%5.9 $4.05 10/30/20201,290,000 shares $4.26 million -5.2%3.8%11.9 $3.30 10/15/20201,360,000 shares $4.43 million No Change4.0%11.8 $3.26 9/30/20201,360,000 shares $4.09 million -3.6%4.0%0 $3.01 9/15/20201,410,000 shares $4.53 million -0.7%4.1%5.4 $3.21 8/31/20201,420,000 shares $4.76 million -4.1%4.1%4.7 $3.35 8/14/20201,480,000 shares $5.42 million No Change4.3%4.7 $3.66 7/31/20201,480,000 shares $4.60 million +2.1%4.4%4.5 $3.11 7/15/20201,450,000 shares $4.89 million -40.8%4.3%4.2 $3.37 HBIO Short Interest - Frequently Asked Questions What is Harvard Bioscience's current short interest? Short interest is the volume of Harvard Bioscience shares that have been sold short but have not yet been covered or closed out. As of June 30th, investors have sold 1,630,000 shares of HBIO short. 4.36% of Harvard Bioscience's shares are currently sold short. Learn More on Harvard Bioscience's current short interest. Which institutional investors are shorting Harvard Bioscience? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Harvard Bioscience: 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 Harvard Bioscience? 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. 4.36% of Harvard Bioscience's floating shares are currently sold short. Is Harvard Bioscience's short interest increasing or decreasing? Harvard Bioscience saw a decrease in short interest in June. As of June 30th, there was short interest totaling 1,630,000 shares, a decrease of 42.4% from the previous total of 2,830,000 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 Harvard Bioscience's float size? Harvard Bioscience currently has issued a total of 44,214,000 shares. Some of Harvard Bioscience's 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. Harvard Bioscience currently has a public float of 37,410,000 shares. How does Harvard Bioscience's short interest compare to its competitors? 4.36% of Harvard Bioscience's shares are currently sold short. Here is how the short interest of companies compare to Harvard Bioscience: Thermo Fisher Scientific Inc. (1.17%), Agilent Technologies, Inc. (1.18%), Mettler-Toledo International, Inc. (3.01%), Waters Corporation (4.33%), Illumina, Inc. (4.53%), Bio-Techne Corp (4.20%), Charles River Laboratories International, Inc. (4.95%), Bio-Rad Laboratories, Inc. (4.85%), Bruker Corporation (9.51%), Pacific Biosciences of California, Inc. (16.19%), 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 Harvard Bioscience stock? Short selling HBIO is an investing strategy that aims to generate trading profit from Harvard Bioscience as its price is falling. HBIO shares are trading down $0.01 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 Harvard Bioscience? A short squeeze for Harvard Bioscience 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 HBIO, which in turn drives the price of the stock up even further. How often is Harvard Bioscience'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 HBIO, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies Thermo Fisher Scientific Short Interest Data Agilent Technologies Short Interest Data Mettler-Toledo International Short Interest Data Waters Short Interest Data Illumina Short Interest Data Bio-Techne Short Interest Data Charles River Laboratories International Short Interest Data Bio-Rad Laboratories Short Interest Data Bruker Short Interest Data Pacific Biosciences of California 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:HBIO) was last updated on 7/14/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredWhich Gold Miner Trades at 30% of NAV? 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