Aeterna Zentaris (AEZS) Short Interest Ratio & Short Volume $3.52 -0.25 (-6.74%) As of 08/7/2025 Add Compare Share Share Short Interest Stock AnalysisChartCompetitorsFDA EventsSEC FilingsTrendsBuy This Stock Aeterna Zentaris Short Interest DataAeterna Zentaris (AEZS) has a short interest of 5,300 shares, representing 0.18% of the float (the number of shares available for trading by the public). This marks a -7.02% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.5, indicating that it would take 0.5 days of the average trading volume of 7,305 shares to cover all short positions.Current Short Interest5,300 sharesPrevious Short Interest5,700 sharesChange Vs. Previous Month-7.02%Dollar Volume Sold Short$31.80 thousandShort Interest Ratio0.5 Days to CoverLast Record DateJuly 15, 2024Outstanding Shares1,793,000 sharesFloat Size3,010,000 sharesShort Percent of Float0.18%Today's Trading Volume2,919 sharesAverage Trading Volume7,305 sharesToday's Volume Vs. Average40% Short Selling Aeterna Zentaris? Sign up to receive the latest short interest report for Aeterna Zentaris and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartAEZS Short Interest Over TimeAEZS Days to Cover Over TimeAEZS Percentage of Float Shorted Over Time Aeterna Zentaris Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/20245,300 shares $31.80 thousand -7.0%0.2%0.5 $6.00 6/30/20245,700 shares $25.19 thousand -38.7%0.2%0.5 $4.42 6/15/20249,300 shares $59.94 thousand -46.6%0.3%1 $6.45 5/31/202417,400 shares $168.61 thousand +171.9%0.6%1.9 $9.69 5/15/20246,400 shares $55.33 thousand +56.1%0.5%1 $8.65 4/30/20244,100 shares $35.10 thousand -75.7%0.3%0.9 $8.56 4/15/202416,900 shares $32.96 thousand -22.1%0.4%1.1 $1.95 3/31/202421,700 shares $47.52 thousand -25.7%0.5%1.3 $2.19 3/15/202429,200 shares $62.49 thousand +46.0%0.6%1.7 $2.14 2/29/202420,000 shares $38.20 thousand -13.8%0.4%1.4 $1.91 Get the Latest News and Ratings for AEZS and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Aeterna Zentaris and its competitors with MarketBeat's FREE daily newsletter. 2/15/202423,200 shares $43.15 thousand +10.0%0.5%1.6 $1.86 1/31/202421,100 shares $39.46 thousand -14.2%0.4%1.5 $1.87 1/15/202424,600 shares $51.17 thousand -17.7%0.5%1.7 $2.08 12/31/202329,900 shares $55.61 thousand -20.3%0.6%2.2 $1.86 12/15/202337,500 shares $80.06 thousand -11.6%0.8%3 $2.14 11/30/202342,400 shares $83.95 thousand -10.7%0.9%4 $1.98 11/15/202347,500 shares $70.30 thousand +1.5%1.0%5.4 $1.48 10/31/202346,800 shares $67.86 thousand -15.4%1.0%5.5 $1.45 10/15/202355,300 shares $97.88 thousand -10.8%1.1%5.9 $1.77 9/30/202362,000 shares $155 thousand +5.8%1.3%6.2 $2.50 9/15/202358,600 shares $155.29 thousand -7.1%1.2%6.2 $2.65 8/31/202363,100 shares $169.11 thousand -0.9%1.3%6.7 $2.68 8/15/202363,700 shares $181.55 thousand +1.9%1.3%6.1 $2.85 7/31/202362,500 shares $188.13 thousand -5.9%1.3%5.9 $3.01 7/15/202366,400 shares $190.57 thousand +6.9%1.4%6 $2.87 6/30/202362,100 shares $158.98 thousand -13.8%1.3%5.2 $2.56 6/15/202372,000 shares $203.76 thousand -12.0%1.5%5.5 $2.83 5/31/202381,800 shares $227.00 thousand +0.1%1.7%5.3 $2.78 5/15/202381,700 shares $242.65 thousand -14.4%1.7%5.2 $2.97 4/30/202395,400 shares $300.51 thousand +23.3%2.0%5.9 $3.15 4/15/202377,400 shares $202.79 thousand +3.8%1.6%5 $2.62 3/31/202374,600 shares $195.45 thousand +1.5%1.5%5 $2.62 3/15/202373,500 shares $196.25 thousand -15.5%1.5%4.9 $2.67 2/28/202387,000 shares $282.75 thousand +7.0%1.8%5.5 $3.25 2/15/202381,300 shares $284.55 thousand -5.8%1.7%5.3 $3.50 1/31/202386,300 shares $330.53 thousand -2.3%1.8%5.7 $3.83 1/15/202388,300 shares $330.68 thousand -9.1%1.8%5.8 $3.75 12/30/202297,100 shares $308.78 thousand +2.2%2.0%6.6 $3.18 12/15/202295,000 shares $316.73 thousand +0.7%2.0%6.6 $3.33 11/30/202294,300 shares $369.66 thousand -5.2%2.0%7 $3.92Trump set to Boost Social Security Checks by 400%? (Ad)If you're collecting or planning to collect social security... You should see this presentation about President Trump's Executive Order #14196. Legendary investor Louis Navellier believes it could soon not only save Social Security from collapse... But BOOST benefits for millions of retirees by up to 400%. No wonder the financial times called this new initiative...Click here to see the details because the stakes couldn't be any higher. 11/15/202299,500 shares $375.12 thousand -11.1%2.1%6.1 $3.77 10/31/2022111,900 shares $459.23 thousand +1.2%2.3%4.4 $4.10 10/15/2022110,600 shares $395.95 thousand -13.5%2.3%2.2 $3.58 9/30/2022127,800 shares $490.05 thousand -8.5%2.6%2.1 $3.83 9/15/2022139,600 shares $661.70 thousand -9.0%2.9%1.7 $4.74 8/31/2022153,400 shares $702.57 thousand -0.4%3.2%1.9 $4.58 8/15/2022154,000 shares $785.40 thousand +48.2%3.2%2 $5.10 7/31/2022103,900 shares $455.09 thousand +17.3%2.2%1.3 $4.38 7/15/202288,600 shares $526.95 thousand +13.2%1.8%1.7 $5.95 6/30/20221,960,000 shares $385.73 thousand -5.8%19.8%1.8 $0.20 6/15/20222,080,000 shares $357.76 thousand -0.5%21.1%3.5 $0.17 5/31/20222,090,000 shares $431.59 thousand -13.6%1.7%3.5 $0.21 5/15/20222,420,000 shares $592.90 thousand -6.9%2.0%4 $0.25 4/30/20222,600,000 shares $793 thousand -6.8%N/A5.2 $0.31 4/15/20222,790,000 shares $920.70 thousand -1.4%N/A4.8 $0.33 3/31/20222,830,000 shares $1.04 million -0.7%N/A4.4 $0.37 3/15/20222,850,000 shares $983.25 thousand +1.1%N/A3.3 $0.35 2/28/20222,820,000 shares $1.02 million -1.4%N/A3.1 $0.36 2/15/20222,860,000 shares $1.14 million -10.3%N/A2.9 $0.40 1/31/20223,190,000 shares $1.15 million -14.7%N/A2.8 $0.36 1/15/20223,740,000 shares $1.35 million No ChangeN/A2.9 $0.36 12/31/20213,740,000 shares $1.33 million +3.6%N/A2.9 $0.36 12/15/20213,610,000 shares $1.49 million +1.4%N/A1.7 $0.41 11/30/20213,560,000 shares $1.69 million -0.8%N/A1.6 $0.48 11/15/20213,590,000 shares $1.99 million -1.6%N/A1.7 $0.55 10/29/20213,650,000 shares $2.16 million -2.4%N/A1.7 $0.59 10/15/20213,740,000 shares $2.26 million +0.3%N/A1.8 $0.60 9/30/20213,730,000 shares $2.80 million -7.7%N/A1.9 $0.75 9/15/20214,040,000 shares $2.50 million -6.3%N/A3.6 $0.62 8/31/20214,310,000 shares $3.10 million -4.4%N/A3.3 $0.72 8/13/20214,510,000 shares $3.09 million -11.2%N/A2.7 $0.69 7/30/20215,080,000 shares $3.71 million +11.2%N/A2.9 $0.73 7/15/20214,570,000 shares $3.37 million +2.0%3.8%2 $0.74 6/30/20214,480,000 shares $3.93 million -15.8%3.7%1.8 $0.88 6/15/20215,320,000 shares $5.13 million +13.2%4.4%1.5 $0.96 5/28/20214,700,000 shares $4.16 million -2.9%3.9%0.7 $0.88 5/14/20214,840,000 shares $4.02 million -9.9%4.0%0.7 $0.83 4/30/20215,370,000 shares $5.91 million -12.4%4.4%0.4 $1.10 4/15/20216,130,000 shares $5.99 million -20.7%5.1%0.3 $0.98 3/31/20217,730,000 shares $8.73 million +89.5%6.4%0.4 $1.13 3/15/20214,080,000 shares $4.81 million +12.1%3.4%0.2 $1.18 2/26/20213,640,000 shares $4.08 million +4.6%3.1%0.2 $1.12 2/12/20213,480,000 shares $6.65 million -31.6%3.0%0.2 $1.91 1/29/20215,090,000 shares $3.71 million -2.9%8.7%0.4 $0.73 1/15/20215,240,000 shares $3.56 million +123.9%8.9%1 $0.68 12/31/20202,340,000 shares $1.00 million +23.8%4.0%0.7 $0.43 12/15/20201,890,000 shares $691.74 thousand +28.6%3.2%0.9 $0.37 11/30/20201,470,000 shares $602.70 thousand +90.2%2.5%0.7 $0.41 11/15/2020772,700 shares $269.90 thousand -19.8%1.3%0.3 $0.35 10/30/2020962,900 shares $318.72 thousand -24.2%1.6%0.4 $0.33Trump set to Boost Social Security Checks by 400%? (Ad)If you're collecting or planning to collect social security... You should see this presentation about President Trump's Executive Order #14196. Legendary investor Louis Navellier believes it could soon not only save Social Security from collapse... But BOOST benefits for millions of retirees by up to 400%. No wonder the financial times called this new initiative...Click here to see the details because the stakes couldn't be any higher. 10/15/20201,270,000 shares $491.49 thousand -19.1%2.2%0.4 $0.39 9/30/20201,570,000 shares $551.07 thousand -13.7%2.7%0.4 $0.35 9/15/20201,820,000 shares $690.33 thousand -21.2%3.1%0.3 $0.38 8/31/20202,310,000 shares $1.08 million +35.9%3.9%0.5 $0.47 8/14/20201,700,000 shares $873.80 thousand +84.9%3.0%0.4 $0.51 AEZS Short Interest - Frequently Asked Questions What is Aeterna Zentaris' current short interest? Short interest is the volume of Aeterna Zentaris shares that have been sold short but have not yet been covered or closed out. As of July 15th, investors have sold 5,300 shares of AEZS short. 0.18% of Aeterna Zentaris' shares are currently sold short. Learn More on Aeterna Zentaris' current short interest. What is a good short interest percentage for Aeterna Zentaris? 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. 0.18% of Aeterna Zentaris' floating shares are currently sold short. Is Aeterna Zentaris' short interest increasing or decreasing? Aeterna Zentaris saw a drop in short interest in July. As of July 15th, there was short interest totaling 5,300 shares, a drop of 7.0% from the previous total of 5,700 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 Aeterna Zentaris' float size? Aeterna Zentaris currently has issued a total of 1,793,000 shares. Some of Aeterna Zentaris' 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. Aeterna Zentaris currently has a public float of 3,010,000 shares. How does Aeterna Zentaris' short interest compare to its competitors? 0.18% of Aeterna Zentaris' shares are currently sold short. Here is how the short interest of companies in the industry of "pharmaceutical products" compare to Aeterna Zentaris: Tempest Therapeutics, Inc. (4.93%), MIRA Pharmaceuticals, Inc. (9.30%), Lisata Therapeutics, Inc. (0.44%), Biodexa Pharmaceuticals PLC Unsponsored ADR (9.99%), NanoViricides, Inc. (0.66%), Tenax Therapeutics, Inc. (9.27%), Adaptimmune Therapeutics PLC (1.46%), CASI Pharmaceuticals Inc. (0.70%), Q32 Bio Inc. (12.54%), Longeveron Inc. (5.20%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Charter Communications, Inc. ($4.13 billion), Royal Caribbean Cruises Ltd. ($2.77 billion), Moderna, Inc. ($2.76 billion), Coinbase Global, Inc. ($2.36 billion), Rivian Automotive, Inc. ($2.22 billion), Paychex, Inc. ($2.02 billion), Tractor Supply Company ($1.81 billion), Enphase Energy, Inc. ($1.65 billion), Chesapeake Energy Co. ($1.62 billion), and lululemon athletica inc. ($1.58 billion). View all of the most shorted stocks. What does it mean to sell short Aeterna Zentaris stock? Short selling AEZS is an investing strategy that aims to generate trading profit from Aeterna Zentaris as its price is falling. AEZS shares are trading down $0.25 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 Aeterna Zentaris? A short squeeze for Aeterna Zentaris 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 AEZS, which in turn drives the price of the stock up even further. How often is Aeterna Zentaris' 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 AEZS, twice per month. The most recent reporting period available is July, 15 2024. More Short Interest Resources from MarketBeat Related Companies Tempest Therapeutics Short Interest MIRA Pharmaceuticals Short Interest Lisata Therapeutics Short Interest Biodexa Pharmaceuticals Short Interest NanoViricides Short Interest Tenax Therapeutics Short Interest Adaptimmune Therapeutics Short Interest CASI Pharmaceuticals Short Interest Q32 Bio Short Interest Longeveron 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:AEZS) was last updated on 8/8/2025 by MarketBeat.com Staff From Our PartnersTrump set to Boost Social Security Checks by 400%?If you're collecting or planning to collect social security... 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