CollPlant Biotechnologies (CLGN) Short Interest Ratio & Short Volume $2.32 +0.08 (+3.57%) Closing price 10/14/2025 04:00 PM EasternExtended Trading$2.24 -0.08 (-3.28%) As of 10/14/2025 07:51 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 ForecastsChartCompetitorsEarningsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock CollPlant Biotechnologies Short Interest DataCollPlant Biotechnologies (CLGN) has a short interest of 36,300 shares, representing 0.37% of the float (the number of shares available for trading by the public). This marks a -12.74% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.8, indicating that it would take 0.8 days of the average trading volume of 254,410 shares to cover all short positions.Current Short Interest36,300 sharesPrevious Short Interest41,600 sharesChange Vs. Previous Month-12.74%Dollar Volume Sold Short$95.47 thousandShort Interest Ratio0.8 Days to CoverLast Record DateSeptember 15, 2025Outstanding Shares12,720,000 sharesFloat Size9,860,000 sharesShort Percent of Float0.37%Today's Trading Volume9,333 sharesAverage Trading Volume254,410 sharesToday's Volume Vs. Average4% Short Selling CollPlant Biotechnologies? Sign up to receive the latest short interest report for CollPlant Biotechnologies and its competitors with MarketBeat's FREE newsletter. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartCLGN Short Interest Over TimeCLGN Days to Cover Over TimeCLGN Percentage of Float Shorted Over Time CollPlant Biotechnologies Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/15/202536,300 shares $95.47 thousand -12.7%0.4%0.8 $2.63 8/31/202541,600 shares $108.99 thousand -34.7%0.4%0.6 $2.62 8/15/202563,700 shares $162.44 thousand -40.9%0.7%0.5 $2.55 7/31/2025107,800 shares $260.88 thousand -14.5%1.1%0.9 $2.42 7/15/2025126,100 shares $218.15 thousand +45.6%1.3%1.1 $1.73 6/30/202586,600 shares $117.78 thousand +9.2%0.9%0.9 $1.36 6/15/202579,300 shares $112.61 thousand -52.3%0.9%0.8 $1.42 5/31/2025166,400 shares $520.83 thousand +7,823.8%1.9%2.1 $3.13 5/15/20252,100 shares $3.57 thousand +61.5%0.0%0.2 $1.70 4/30/20251,300 shares $2.76 thousand -43.5%0.0%0.1 $2.12 Get the Latest News and Ratings for CLGN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for CollPlant Biotechnologies and its competitors with MarketBeat's FREE daily newsletter. 4/15/20252,300 shares $5.65 thousand +21.1%0.0%0.2 $2.46 3/31/20251,900 shares $4.90 thousand No Change0.0%0.2 $2.58 3/15/20251,900 shares $6.21 thousand -60.4%0.0%0.2 $3.27 2/28/20254,800 shares $16.80 thousand -25.0%0.1%0.6 $3.50 2/15/20256,400 shares $23.04 thousand -54.0%0.1%0.6 $3.60 1/31/202513,900 shares $51.36 thousand +162.3%0.2%1.1 $3.70 1/15/20255,300 shares $21.09 thousand -11.7%0.1%0.4 $3.98 12/31/20246,000 shares $21.60 thousand +87.5%0.1%0.4 $3.60 12/15/20243,200 shares $11.81 thousand -52.2%0.0%0.2 $3.69 11/30/20246,700 shares $30.02 thousand -44.6%0.1%0.6 $4.48 11/15/202412,100 shares $50.58 thousand -21.4%0.2%1.1 $4.18 10/31/202415,400 shares $57.60 thousand +6.2%0.2%1.4 $3.74 10/15/202414,500 shares $64.53 thousand +79.0%0.2%1.2 $4.45 9/30/20248,100 shares $38.07 thousand -18.2%0.1%0.7 $4.70 9/15/20249,900 shares $49.60 thousand +5.3%0.1%0.8 $5.01 8/31/20249,400 shares $49.77 thousand +11.9%0.1%0.7 $5.30 8/15/20248,400 shares $38.64 thousand +64.7%0.1%0.6 $4.60 7/31/20245,100 shares $21.83 thousand +34.2%0.1%0.4 $4.28 7/15/20243,800 shares $19.23 thousand +533.3%0.1%0.5 $5.06 6/30/2024600 shares $2.98 thousand -64.7%0.0%0.1 $4.97 6/15/20241,700 shares $8.72 thousand -26.1%0.0%0.2 $5.13 5/31/20242,300 shares $12.88 thousand -66.2%0.0%0.4 $5.60 5/15/20246,800 shares $43.45 thousand +17.2%0.1%1.1 $6.39 4/30/20245,800 shares $34.10 thousand -34.8%0.1%0.8 $5.88 4/15/20248,900 shares $46.06 thousand -17.6%0.1%1.2 $5.18 3/31/202410,800 shares $57.78 thousand +33.3%0.1%1.3 $5.35 3/15/20248,100 shares $40.50 thousand -13.8%0.1%0.7 $5.00 2/29/20249,400 shares $49.07 thousand +20.5%0.1%0.7 $5.22 2/15/20247,800 shares $41.81 thousand -37.1%0.1%0.6 $5.36 1/31/202412,400 shares $67.95 thousand -26.2%0.2%0.8 $5.48 1/15/202416,800 shares $95.76 thousand -33.9%0.2%1.1 $5.70 12/31/202325,400 shares $162.31 thousand +120.9%0.3%1.6 $6.39 12/15/202311,500 shares $60.03 thousand -18.4%0.2%0.8 $5.22 11/30/202314,100 shares $77.27 thousand -20.8%0.2%1.1 $5.48 11/15/202317,800 shares $97.90 thousand -15.6%0.2%1.2 $5.50 10/31/202321,100 shares $113.31 thousand -33.0%0.3%1.5 $5.37 10/15/202331,500 shares $162.86 thousand -12.7%0.4%2.4 $5.17 9/30/202336,100 shares $201.08 thousand -15.3%0.5%2.3 $5.57 9/15/202342,600 shares $291.81 thousand +1.4%0.6%2.4 $6.85 8/31/202342,000 shares $272.58 thousand +483.3%0.6%2.5 $6.49 8/15/20237,200 shares $44.50 thousand +71.4%0.1%0.5 $6.18 7/31/20234,200 shares $25.49 thousand -56.3%0.1%0.3 $6.07 7/15/20239,600 shares $64.32 thousand +11.6%0.1%0.7 $6.70 6/30/20238,600 shares $69.75 thousand -25.9%0.1%0.9 $8.11 6/15/202311,600 shares $86.42 thousand -53.0%0.2%1.2 $7.45 5/31/202324,700 shares $192.25 thousand +42.0%0.3%2.9 $7.78 5/15/202317,400 shares $118.53 thousand -24.4%0.2%2.3 $6.81 4/30/202323,000 shares $157.55 thousand +0.9%0.3%2.8 $6.85 4/15/202322,800 shares $163.93 thousand +4.6%0.3%1.9 $7.19 3/31/202321,800 shares $153.04 thousand -12.1%0.3%1.5 $7.02 3/15/202324,800 shares $210.81 thousand +17.5%0.3%1.1 $8.50 2/28/202321,100 shares $229.15 thousand -28.5%0.3%0.8 $10.86 2/15/202329,500 shares $348.10 thousand +21.4%0.3%1 $11.80 1/31/202324,300 shares $263.41 thousand -30.4%0.3%0.8 $10.84 1/15/202334,900 shares $282.34 thousand -47.7%0.4%1.2 $8.09 12/30/202266,700 shares $556.95 thousand +171.1%0.7%2.4 $8.35 12/15/202224,600 shares $199.26 thousand +7.4%0.3%1 $8.10 11/30/202222,900 shares $115.19 thousand -14.9%0.2%1.3 $5.03 11/15/202226,900 shares $153.87 thousand +13.5%0.3%1.7 $5.72 10/31/202223,700 shares $148.36 thousand -15.1%0.2%1.7 $6.26 10/15/202227,900 shares $201.72 thousand -7.0%0.3%1.9 $7.23 9/30/202230,000 shares $204 thousand -12.3%0.4%1.7 $6.80 9/15/202234,200 shares $273.43 thousand -22.5%0.4%1.9 $8.00 8/31/202244,100 shares $329.43 thousand -26.3%0.6%2.4 $7.47 8/15/202259,800 shares $597.40 thousand +18.2%0.8%3.3 $9.99 7/31/202250,600 shares $389.11 thousand -7.3%0.7%2.1 $7.69 7/15/202254,600 shares $472.29 thousand -9.8%0.7%2.4 $8.65 6/30/202260,500 shares $484 thousand -17.9%0.8%2.8 $8.00 6/15/202273,700 shares $622.77 thousand -14.3%1.0%3 $8.45 5/31/202286,000 shares $799.80 thousand +5.5%1.2%2.7 $9.30 5/15/202281,500 shares $664.23 thousand +2.5%1.1%2.3 $8.15 4/30/202279,500 shares $791.03 thousand -17.1%1.1%2.3 $9.95 4/15/202295,900 shares $935.03 thousand -24.9%1.3%2.2 $9.75 3/31/2022127,700 shares $1.43 million +24.8%1.7%2.5 $11.22 3/15/2022102,300 shares $946.28 thousand +34.4%1.4%1.6 $9.25 2/28/202276,100 shares $821.88 thousand -3.2%1.0%1 $10.80 2/15/202278,600 shares $808.01 thousand +7.7%1.1%1.1 $10.28 1/31/202273,000 shares $716.86 thousand +32.3%1.0%1 $9.82 1/15/202255,200 shares $646.39 thousand -35.8%N/A0.7 $11.71 12/31/202186,000 shares $1.41 million +156.0%1.1%1.2 $16.36 12/15/202133,600 shares $412.94 thousand +226.2%0.4%0.5 $12.29 11/30/202110,300 shares $177.37 thousand -29.5%0.1%0.3 $17.22 11/15/202114,600 shares $312.88 thousand +24.8%0.2%0.4 $21.43 10/29/202111,700 shares $257.40 thousand +69.6%0.2%0.4 $22.00 10/15/20216,900 shares $112.54 thousand -46.9%0.1%0.3 $16.31 9/30/202113,000 shares $219.70 thousand +16.1%0.2%0.6 $16.90 9/15/202111,200 shares $190.29 thousand -14.5%0.2%0.4 $16.99 8/31/202113,100 shares $227.94 thousand -25.1%0.2%0.3 $17.40 8/13/202117,500 shares $327.25 thousand No Change0.2%0.4 $18.70 5/14/202127,500 shares $384.45 thousand -53.9%N/A0.4 $13.98 4/30/202159,700 shares $878.19 thousand +136.9%N/A0.5 $14.71 4/15/202125,200 shares $365.90 thousand +641.2%N/A0.2 $14.52 3/31/20213,400 shares $42.47 thousand -63.0%N/A0 $12.49 3/15/20219,200 shares $130.27 thousand +187.5%N/A0.1 $14.16 2/26/20213,200 shares $42.34 thousand +6.7%N/A0 $13.23 2/12/20213,000 shares $72.75 thousand -79.7%N/A0 $24.25 1/29/202114,800 shares $258.85 thousand +516.7%N/A0.3 $17.49 1/15/20212,400 shares $34.78 thousand -69.6%N/A0.1 $14.49 12/31/20207,900 shares $82.04 thousand -43.6%N/A0.3 $10.39 12/15/202014,000 shares $130.34 thousand +3.7%N/A0.5 $9.31 11/30/202013,500 shares $105.98 thousand +150.0%N/A0.6 $7.85 11/15/20205,400 shares $37.53 thousand +170.0%N/A0.3 $6.95 10/30/20202,000 shares $14 thousand -76.7%N/A0.2 $7.00 10/15/20208,600 shares $64.84 thousand +561.5%N/A0.9 $7.54 CLGN Short Interest - Frequently Asked Questions What is CollPlant Biotechnologies' current short interest? Short interest is the volume of CollPlant Biotechnologies shares that have been sold short but have not yet been closed out or covered. As of September 15th, traders have sold 36,300 shares of CLGN short. 0.37% of CollPlant Biotechnologies' shares are currently sold short. Learn More on CollPlant Biotechnologies' current short interest. What is a good short interest ratio for CollPlant Biotechnologies? 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. CLGN shares currently have a short interest ratio of 1.0. Learn More on CollPlant Biotechnologies's short interest ratio. What is a good short interest percentage for CollPlant Biotechnologies? 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. 0.37% of CollPlant Biotechnologies' floating shares are currently sold short. Is CollPlant Biotechnologies' short interest increasing or decreasing? CollPlant Biotechnologies saw a decrease in short interest in September. As of September 15th, there was short interest totaling 36,300 shares, a decrease of 12.7% from the previous total of 41,600 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 CollPlant Biotechnologies' float size? CollPlant Biotechnologies currently has issued a total of 12,720,000 shares. Some of CollPlant Biotechnologies' 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. CollPlant Biotechnologies currently has a public float of 9,860,000 shares. How does CollPlant Biotechnologies' short interest compare to its competitors? 0.37% of CollPlant Biotechnologies' shares are currently sold short. Here is how the short interest of companies in the industry of "medical equipment" compare to CollPlant Biotechnologies: Pro-Dex, Inc. (12.42%), Apyx Medical Corporation (0.73%), Orchestra BioMed Holdings, Inc. (1.75%), InspireMD, Inc. (0.30%), Fonar Corporation (1.00%), Nutriband Inc. (2.60%), Edap Tms S.A. (0.15%), Plus Therapeutics, Inc. (4.10%), Vivani Medical, Inc. (0.85%), Jin Medical International Ltd. (0.30%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: AppLovin Corporation ($8.81 billion), Canadian Natural Resources Limited ($5.82 billion), Reddit Inc. ($5.19 billion), Coinbase Global, Inc. ($4.52 billion), Robinhood Markets, Inc. ($4.30 billion), Charter Communications, Inc. ($3.75 billion), CoreWeave Inc. ($3.66 billion), Seagate Technology Holdings PLC ($3.57 billion), Live Nation Entertainment, Inc. ($3.33 billion), and Rocket Lab Corporation ($3.26 billion). View all of the most shorted stocks. What does it mean to sell short CollPlant Biotechnologies stock? Short selling CLGN is an investing strategy that aims to generate trading profit from CollPlant Biotechnologies as its price is falling. CLGN shares are trading up $0.08 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 CollPlant Biotechnologies? A short squeeze for CollPlant Biotechnologies 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 CLGN, which in turn drives the price of the stock up even further. How often is CollPlant Biotechnologies' 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 CLGN, twice per month. The most recent reporting period available is September, 15 2025. 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