Astrotech (ASTC) Short Interest Ratio & Short Volume $4.11 -0.15 (-3.41%) As of 03:22 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Short Interest Stock AnalysisAnalyst ForecastsChartCompetitorsEarningsHeadlinesInsider TradesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Astrotech Short Interest DataAstrotech (ASTC) has a short interest of 5,900 shares, representing 0.40% of the float (the number of shares available for trading by the public). This marks a -24.36% decrease in short interest from the previous month. The short interest ratio (days to cover) is 0.0, indicating that it would take 0.0 days of the average trading volume of 167,922 shares to cover all short positions.Current Short Interest5,900 sharesPrevious Short Interest7,800 sharesChange Vs. Previous Month-24.36%Dollar Volume Sold Short$28.91 thousandShort Interest Ratio0.0 Days to CoverLast Record DateSeptember 30, 2025Outstanding Shares1,760,000 sharesFloat Size1,460,000 sharesShort Percent of Float0.40%Today's Trading Volume36,234 sharesAverage Trading Volume167,922 sharesToday's Volume Vs. Average22% Short Selling Astrotech? Sign up to receive the latest short interest report for Astrotech and its competitors with MarketBeat's FREE newsletter. Email Address Get Report View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartASTC Short Interest Over TimeASTC Days to Cover Over TimeASTC Percentage of Float Shorted Over Time Astrotech Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/30/20255,900 shares $28.91 thousand -24.4%0.4%0 $4.90 9/15/20257,800 shares $38.97 thousand +41.8%0.6%1.2 $5.00 8/31/20255,500 shares $28.33 thousand +103.7%0.4%0.9 $5.15 8/15/20252,700 shares $14.04 thousand -15.6%0.2%0.5 $5.20 7/31/20253,200 shares $17.94 thousand +113.3%0.2%0.7 $5.61 7/15/20251,500 shares $8.64 thousand -40.0%0.1%0.3 $5.76 6/30/20252,500 shares $14.45 thousand -52.8%0.2%0.5 $5.78 6/15/20255,300 shares $30.16 thousand +211.8%0.4%1.8 $5.69 5/31/20251,700 shares $9.81 thousand +54.6%0.1%0.6 $5.77 5/15/20251,100 shares $6.49 thousand -15.4%0.1%0.4 $5.90 Get the Latest News and Ratings for ASTC and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Astrotech and its competitors with MarketBeat's FREE daily newsletter. 4/30/20251,300 shares $7.59 thousand -38.1%0.1%0.4 $5.84 4/15/20252,100 shares $12.20 thousand No Change0.1%0.6 $5.81 3/31/20252,100 shares $13.61 thousand +10.5%0.1%0.5 $6.48 3/15/20251,900 shares $12.33 thousand -29.6%0.1%0.3 $6.49 2/28/20252,700 shares $17.66 thousand +145.5%0.2%0.2 $6.54 2/15/20251,100 shares $7.32 thousand -50.0%0.1%0.1 $6.65 1/31/20252,200 shares $14.61 thousand -18.5%0.2%0.1 $6.64 1/15/20252,700 shares $17.69 thousand +3.9%0.2%0.1 $6.55 12/31/20242,600 shares $17.47 thousand -75.5%0.2%0.1 $6.72 12/15/202410,600 shares $72.61 thousand +241.9%0.7%0.5 $6.85 11/30/20243,100 shares $22.01 thousand -35.4%0.2%0.2 $7.10 11/15/20244,800 shares $34.46 thousand -5.9%0.3%0.2 $7.18 10/31/20245,100 shares $37.08 thousand -46.3%0.3%0.2 $7.27 10/15/20249,500 shares $76.95 thousand +1.1%0.6%0.3 $8.10 9/30/20249,400 shares $75.11 thousand +40.3%0.6%0.4 $7.99 9/15/20246,700 shares $55.07 thousand -40.2%0.5%0.3 $8.22 8/31/202411,200 shares $125.84 thousand -11.8%0.8%0.5 $11.24 8/15/202412,700 shares $114.30 thousand +5.0%0.9%0.7 $9.00 7/31/202412,100 shares $101.64 thousand -9.7%0.8%2.5 $8.40 7/15/202413,400 shares $115.04 thousand -11.3%0.9%2.9 $8.59 6/30/202415,100 shares $134.39 thousand +11.0%1.0%3.8 $8.90 6/15/202413,600 shares $127.70 thousand -5.6%0.9%3.6 $9.39 5/31/202414,400 shares $135.36 thousand +28.6%1.0%4.5 $9.40 5/15/202411,200 shares $101.58 thousand -17.0%0.8%3.1 $9.07 4/30/202413,500 shares $123.53 thousand -15.1%0.9%3.8 $9.15 4/15/202415,900 shares $155.50 thousand -8.1%1.1%4.8 $9.78 3/31/202417,300 shares $154.83 thousand -8.5%1.2%4.9 $8.95 3/15/202418,900 shares $167.83 thousand +2.7%1.3%5.6 $8.88 2/29/202418,400 shares $149.04 thousand +21.1%1.2%5.1 $8.10 2/15/202415,200 shares $114.00 thousand +0.7%1.0%4.2 $7.50 1/31/202415,100 shares $117.63 thousand +2.7%1.0%3.4 $7.79 1/15/202414,700 shares $110.69 thousand -17.9%1.0%3.7 $7.53 12/31/202317,900 shares $151.97 thousand +39.8%1.2%4.4 $8.49 12/15/202312,800 shares $108.80 thousand -2.3%0.9%3.1 $8.50 11/30/202313,100 shares $106.11 thousand -23.8%0.9%3.5 $8.10 11/15/202317,200 shares $125.56 thousand +16.2%1.1%4.6 $7.30 10/31/202314,800 shares $136.01 thousand -0.7%1.0%4.4 $9.19 10/15/202314,900 shares $142.02 thousand -3.9%1.0%4.1 $9.53 9/30/202315,500 shares $156.55 thousand -13.9%1.1%4 $10.10 9/15/202318,000 shares $178.20 thousand -10.0%1.2%1.5 $9.90 8/31/202320,000 shares $196 thousand -14.5%1.3%1.7 $9.80 8/15/202323,400 shares $245.23 thousand -2.5%1.6%2 $10.48 7/31/202324,000 shares $305.04 thousand -4.8%1.6%2 $12.71 7/15/202325,200 shares $336.92 thousand -57.2%1.7%2.1 $13.37 6/30/202358,900 shares $834.02 thousand +130.1%4.0%5 $14.16 6/15/202325,600 shares $293.38 thousand -4.1%1.7%6.1 $11.46 5/31/202326,700 shares $307.05 thousand +4.7%1.8%7 $11.50 5/15/202325,500 shares $279.74 thousand +3.7%1.7%5.1 $10.97 4/30/202324,600 shares $255.84 thousand -4.7%1.6%4 $10.40 4/15/202325,800 shares $277.97 thousand -19.9%1.7%2.7 $10.77 3/31/202332,200 shares $343.25 thousand +0.9%2.1%3.2 $10.66 3/15/202331,900 shares $338.46 thousand -18.6%2.1%2.6 $10.61 2/28/202339,200 shares $507.64 thousand +4.8%2.6%2.3 $12.95 2/15/202337,400 shares $453.29 thousand -22.7%2.5%1.9 $12.12 1/31/202348,400 shares $585.16 thousand -19.2%3.2%2.5 $12.09 1/15/202359,900 shares $727.19 thousand +0.2%4.0%4 $12.14 12/30/202259,800 shares $597.40 thousand -1.6%4.0%3.7 $9.99 12/15/202260,800 shares $614.69 thousand +201.0%4.0%3.9 $10.11 11/30/202220,200 shares $207.01 thousand -82.7%1.3%1.5 $10.25 11/15/2022116,500 shares $48.93 thousand +82.3%0.3%0.4 $0.42 10/31/202263,900 shares $25.96 thousand +145.8%0.1%0.2 $0.41 10/15/202226,000 shares $9.88 thousand -65.4%0.1%0.1 $0.38 9/30/202275,200 shares $33.31 thousand +88.9%0.2%0.3 $0.44 9/15/202239,800 shares $18.50 thousand +30.9%0.1%0.2 $0.46 8/31/202230,400 shares $13.98 thousand -52.7%0.1%0.1 $0.46 8/15/202264,200 shares $31.38 thousand -19.6%0.1%0.4 $0.49 7/31/202279,800 shares $36.71 thousand -27.0%0.2%0.5 $0.46 7/15/2022109,300 shares $48.64 thousand +35.1%0.2%0.8 $0.45 6/30/202280,900 shares $34.79 thousand -11.7%2.5%0.5 $0.43 6/15/202291,600 shares $41.22 thousand -29.9%2.9%0.5 $0.45 5/31/2022130,700 shares $71.30 thousand -9.6%0.3%0.7 $0.55 5/15/2022144,600 shares $72.73 thousand +40.5%0.3%0.6 $0.50 4/30/2022102,900 shares $55.56 thousand -37.2%0.2%0.4 $0.54 4/15/2022163,800 shares $104.18 thousand +73.2%0.4%0.6 $0.64 3/31/202294,600 shares $68.20 thousand -27.3%0.2%0.3 $0.72 3/15/2022130,100 shares $89.91 thousand -50.5%0.3%0.3 $0.69 2/28/2022262,900 shares $186.74 thousand +1.4%0.6%0.7 $0.71 2/15/2022259,300 shares $165.95 thousand +132.6%0.6%0.6 $0.64 1/31/2022111,500 shares $72.48 thousand +201.4%0.3%0.2 $0.65 1/15/202237,000 shares $24.62 thousand -73.9%0.1%0.1 $0.67 12/31/2021141,700 shares $96.36 thousand -48.8%0.3%0.2 $0.68 12/15/2021276,900 shares $192.17 thousand -25.8%0.6%0.4 $0.69 11/30/2021373,300 shares $297.89 thousand -8.6%0.8%0.5 $0.80 11/15/2021408,400 shares $377.16 thousand +44.2%0.9%0.3 $0.92 10/29/2021283,300 shares $291.80 thousand +8.2%0.6%0.2 $1.03 10/15/2021261,800 shares $256.56 thousand -44.6%0.6%0.2 $0.98 9/30/2021472,800 shares $496.44 thousand -49.9%1.0%0.4 $1.05 9/15/2021944,100 shares $991.31 thousand -12.6%2.1%0.6 $1.05 8/31/20211,080,000 shares $1.20 million +8.8%2.4%0.7 $1.11 8/13/2021992,400 shares $1.07 million +6.6%2.2%0.8 $1.08 7/30/2021931,300 shares $1.01 million +4.3%2.1%0.7 $1.08 7/15/2021893,000 shares $982.30 thousand +75.6%2.0%0.5 $1.10 6/30/2021508,600 shares $676.44 thousand -16.3%1.1%0.2 $1.33 6/15/2021607,300 shares $746.98 thousand -24.3%1.4%0.2 $1.23 5/28/2021802,700 shares $939.16 thousand -24.3%1.8%0.2 $1.17 5/14/20211,060,000 shares $1.12 million -54.1%N/A0.3 $1.06 4/30/20212,310,000 shares $2.86 million +111.9%N/A0.5 $1.24 4/15/20211,090,000 shares $1.30 million +130.2%N/A0.2 $1.19 3/31/2021473,500 shares $970.68 thousand +32.1%N/A0.1 $2.05 3/15/2021358,400 shares $799.23 thousand -20.8%N/A0.2 $2.23 2/26/2021452,500 shares $1.07 million -26.9%N/A0.2 $2.36 2/12/2021619,300 shares $2.22 million +128.2%N/A0.3 $3.59 1/29/2021271,400 shares $575.37 thousand +155.8%N/A0.2 $2.12 1/15/2021106,100 shares $273.74 thousand +23.1%N/A0.1 $2.58 12/31/202086,200 shares $159.47 thousand +12.7%N/A0 $1.85 12/15/202076,500 shares $146.88 thousand -2.8%N/A0 $1.92 11/30/202078,700 shares $155.04 thousand -25.3%N/A0 $1.97 11/15/2020105,300 shares $199.02 thousand -84.7%N/A0 $1.89 10/30/2020689,700 shares $1.39 million +22.3%N/A0.2 $2.01 ASTC Short Interest - Frequently Asked Questions What is Astrotech's current short interest? Short interest is the volume of Astrotech shares that have been sold short but have not yet been closed out or covered. As of September 30th, traders have sold 5,900 shares of ASTC short. 0.40% of Astrotech's shares are currently sold short. Learn More on Astrotech's current short interest. What is a good short interest percentage for Astrotech? 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. 0.40% of Astrotech's floating shares are currently sold short. Is Astrotech's short interest increasing or decreasing? Astrotech saw a drop in short interest in the month of September. As of September 30th, there was short interest totaling 5,900 shares, a drop of 24.4% from the previous total of 7,800 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 Astrotech's float size? Astrotech currently has issued a total of 1,760,000 shares. Some of Astrotech'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. Astrotech currently has a public float of 1,460,000 shares. How does Astrotech's short interest compare to its competitors? 0.40% of Astrotech's shares are currently sold short. Here is how the short interest of companies in the industry of "measuring and control equipment" compare to Astrotech: Data I/O Corporation (0.61%), Precipio, Inc. (0.10%), MultiSensor AI Holdings, Inc. (1.03%), ScanTech AI Systems Inc. (4.96%), Bionano Genomics, Inc. (17.04%), Talis Biomedical Co. (0.30%), Schmitt Industries, Inc. (0.00%), Telesis Bio, Inc. (0.02%), ThermoGenesis Holdings, Inc. (0.00%), HTG Molecular Diagnostics, Inc. (0.07%), 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 ($15.71 billion), Robinhood Markets, Inc. ($7.56 billion), Reddit Inc. ($4.55 billion), Coinbase Global, Inc. ($4.53 billion), CoreWeave Inc. ($4.43 billion), Charter Communications, Inc. ($4.07 billion), Seagate Technology Holdings PLC ($3.94 billion), IonQ, Inc. ($3.78 billion), TC Energy Corporation ($3.13 billion), and Live Nation Entertainment, Inc. ($3.12 billion). View all of the most shorted stocks. What does it mean to sell short Astrotech stock? Short selling ASTC is an investing strategy that aims to generate trading profit from Astrotech as its price is falling. ASTC shares are trading down $0.15 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 Astrotech? A short squeeze for Astrotech 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 ASTC, which in turn drives the price of the stock up even further. How often is Astrotech'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 ASTC, twice per month. The most recent reporting period available is September, 30 2025. 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