Aspen Aerogels (ASPN) Short Interest Ratio & Short Volume $8.13 +0.36 (+4.68%) Closing price 07/23/2025 03:59 PM EasternExtended Trading$8.22 +0.09 (+1.06%) As of 04:48 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Aspen Aerogels Short Interest DataAspen Aerogels (ASPN) has a short interest of 8.94 million shares, representing 11.38% of the float (the number of shares available for trading by the public). This marks a -0.78% decrease in short interest from the previous month. The short interest ratio (days to cover) is 4.7, indicating that it would take 4.7 days of the average trading volume of 2.05 million shares to cover all short positions.Current Short Interest8,940,000 sharesPrevious Short Interest9,010,000 sharesChange Vs. Previous Month-0.78%Dollar Volume Sold Short$53.10 millionShort Interest Ratio4.7 Days to CoverLast Record DateJune 30, 2025Outstanding Shares82,110,000 sharesShort Percent of Float11.38%Today's Trading Volume3,820,598 sharesAverage Trading Volume2,051,109 sharesToday's Volume Vs. Average186% Short Selling Aspen Aerogels? Sign up to receive the latest short interest report for Aspen Aerogels and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartASPN Short Interest Over TimeASPN Days to Cover Over TimeASPN Percentage of Float Shorted Over Time Aspen Aerogels Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20258,940,000 shares $53.10 million -0.8%11.4%4.7 $5.94 6/15/20259,010,000 shares $55.55 million -3.4%11.5%4.8 $6.17 5/31/20259,330,000 shares $53.88 million +33.3%11.9%4.9 $5.78 5/15/20257,000,000 shares $39.97 million -16.6%8.9%3.5 $5.71 4/30/20258,390,000 shares $45.22 million -8.1%N/A3.9 $5.39 4/15/20259,130,000 shares $47.34 million -0.8%11.6%4.7 $5.19 3/31/20259,200,000 shares $58.78 million +3.1%11.7%4.6 $6.39 3/15/20258,920,000 shares $65.87 million -8.2%11.4%4.6 $7.38 2/28/20259,720,000 shares $73.80 million -15.3%12.4%5 $7.59 2/15/202511,470,000 shares $99.40 million +6.1%14.6%5.9 $8.67 Get the Latest News and Ratings for ASPN and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Aspen Aerogels and its competitors with MarketBeat's FREE daily newsletter. 1/31/202510,810,000 shares $126.75 million +2.9%N/A5.5 $11.73 1/15/202510,510,000 shares $133.48 million +7.0%N/A4.8 $12.70 12/31/20249,820,000 shares $116.66 million +9.4%N/A4 $11.88 12/15/20248,980,000 shares $118.00 million -1.5%N/A3.6 $13.14 11/30/20249,120,000 shares $134.98 million -1.5%N/A3.6 $14.80 11/15/20249,260,000 shares $132.09 million +8.8%N/A3.6 $14.27 10/31/20248,510,000 shares $151.73 million -0.1%N/A3.5 $17.83 10/15/20248,520,000 shares $191.10 million +31.5%N/A3.9 $22.43 9/30/20246,480,000 shares $179.56 million +8.2%N/A3.6 $27.71 9/15/20245,990,000 shares $148.79 million +8.5%N/A3.7 $24.84 8/31/20245,520,000 shares $158.37 million +21.1%N/A3.5 $28.69 8/15/20244,560,000 shares $111.31 million +2.0%N/A3 $24.41 7/31/20244,470,000 shares $91.32 million -3.5%N/A3.3 $20.43 7/15/20244,630,000 shares $125.57 million +7.4%N/A3.4 $27.12 6/30/20244,310,000 shares $102.79 million +12.8%N/A3.4 $23.85 6/15/20243,820,000 shares $114.98 million +3.2%N/A3.1 $30.10 5/31/20243,700,000 shares $110.70 million -17.8%N/A3.2 $29.92 5/15/20244,500,000 shares $117.65 million -8.9%N/A4.1 $26.15 4/30/20244,940,000 shares $77.31 million +2.5%N/A4 $15.65 4/15/20244,820,000 shares $73.55 million +5.0%N/A4.9 $15.26 3/31/20244,590,000 shares $80.78 million -4.0%N/A4.4 $17.60 3/15/20244,780,000 shares $73.04 million +4.6%N/A4.5 $15.28 2/29/20244,570,000 shares $78.51 million -1.7%N/A4.2 $17.18 2/15/20244,650,000 shares $81.05 million +2.4%N/A4.5 $17.43 1/31/20244,540,000 shares $50.94 million -2.8%N/A5.3 $11.22 1/15/20244,670,000 shares $62.81 million -11.4%N/A5.1 $13.45 12/31/20235,270,000 shares $83.16 million +0.6%N/A5.9 $15.78 12/15/20235,240,000 shares $72.31 million -9.5%N/A5.3 $13.80 11/30/20235,790,000 shares $60.68 million -1.0%N/A6.1 $10.48 11/15/20235,850,000 shares $60.55 million -10.4%N/A6.5 $10.35I warned you about Nvidia… now look what’s happening (Ad)Nvidia just got Trump’s greenlight to sell high-powered AI chips to China — and their stock surged 5% before the open. That’s the kind of move Tim Sykes built his XGPT system to trade. It scans AI news in real time, filters the noise, and pinpoints when to strike. He’s now showing exactly how it works — before the next headline hits.Watch how Tim Sykes trades AI headlines for real gains 10/31/20236,530,000 shares $50.41 million +13.4%N/A7.1 $7.72 10/15/20235,760,000 shares $47.92 million -1.7%N/A6.4 $8.32 9/30/20235,860,000 shares $50.40 million +7.5%N/A7.2 $8.60 9/15/20235,450,000 shares $35.15 million -2.3%N/A7.8 $6.45 8/31/20235,580,000 shares $33.95 million +8.6%N/A7.6 $6.09 8/15/20235,140,000 shares $32.25 million +7.5%N/A6.8 $6.28 7/31/20234,780,000 shares $39.87 million -12.8%N/A6.3 $8.34 7/15/20235,480,000 shares $45.54 million +3.6%N/A6.6 $8.31 6/30/20235,290,000 shares $41.74 million -0.2%N/A5.8 $7.89 6/15/20235,300,000 shares $43.83 million +11.6%N/A5.5 $8.27 5/31/20234,750,000 shares $31.18 million +10.0%N/A4.4 $6.57 5/15/20234,320,000 shares $34.00 million +5.4%N/A3.9 $7.87 4/30/20234,100,000 shares $25.67 million +12.3%N/A3.5 $6.26 4/15/20233,650,000 shares $21.61 million +6.4%N/A3.2 $5.92 3/31/20233,430,000 shares $25.55 million +12.5%N/A3.2 $7.45 3/15/20233,050,000 shares $23.79 million +1.3%N/A3 $7.80 2/28/20233,010,000 shares $32.66 million +3.4%N/A3.5 $10.85 2/15/20232,910,000 shares $33.47 million +7.4%N/A2.9 $11.50 1/31/20232,710,000 shares $28.46 million -1.1%N/A3 $10.50 1/15/20232,740,000 shares $32.55 million -16.0%N/A3.4 $11.88 12/30/20223,260,000 shares $38.44 million +9.0%N/A4.2 $11.79 12/15/20222,990,000 shares $34.50 million -3.2%N/A4 $11.54 11/30/20223,090,000 shares $37.27 million +7.3%N/A4.4 $12.06 11/15/20222,880,000 shares $39.43 million +15.7%N/A7 $13.69 10/31/20222,490,000 shares $31.57 million -3.1%N/A6 $12.68 10/15/20222,570,000 shares $23.80 million -2.3%N/A5.8 $9.26 9/30/20222,630,000 shares $24.25 million -4.0%N/A5.4 $9.22 9/15/20222,740,000 shares $36.66 million -3.9%N/A2.2 $13.38 8/31/20222,850,000 shares $37.08 million +1.8%N/A2.3 $13.01 8/15/20222,800,000 shares $39.23 million +2.2%N/A2.2 $14.01 7/31/20222,740,000 shares $35.84 million +4.6%N/A2.1 $13.08 7/15/20222,620,000 shares $25.20 million +31.7%N/A2.1 $9.62 6/30/20221,990,000 shares $19.66 million -7.4%N/A1.7 $9.88 6/15/20222,150,000 shares $32.53 million +15.6%N/A5.3 $15.13 5/31/20221,860,000 shares $32.59 million +8.8%N/A4.7 $17.52 5/15/20221,710,000 shares $29.36 million +7.6%N/A4.2 $17.17 4/30/20221,590,000 shares $34.34 million +0.6%5.6%4.2 $21.60 4/15/20221,580,000 shares $41.74 million +0.6%5.6%4 $26.42 3/31/20221,570,000 shares $54.13 million +17.2%6.0%4 $34.48 3/15/20221,340,000 shares $37.72 million -2.2%4.8%3.6 $28.15 2/28/20221,370,000 shares $40.55 million -19.9%4.9%4 $29.60 2/15/20221,710,000 shares $49.25 million +43.7%N/A5 $28.80 1/31/20221,190,000 shares $35.34 million +44.9%4.3%3.9 $29.70 1/15/2022821,400 shares $31.41 million +20.0%3.0%3 $38.24 12/31/2021684,600 shares $34.09 million +48.3%2.5%2.8 $49.79 12/15/2021461,800 shares $24.97 million +11.8%1.7%2 $54.08 11/30/2021413,100 shares $23.61 million -14.5%1.5%1.9 $57.16 11/15/2021483,000 shares $29.21 million -7.0%1.7%2.3 $60.48 10/29/2021519,500 shares $28.29 million +5.9%1.9%2.5 $54.46 10/15/2021490,800 shares $24.29 million -0.4%1.8%2.4 $49.50I warned you about Nvidia… now look what’s happening (Ad)Nvidia just got Trump’s greenlight to sell high-powered AI chips to China — and their stock surged 5% before the open. That’s the kind of move Tim Sykes built his XGPT system to trade. It scans AI news in real time, filters the noise, and pinpoints when to strike. He’s now showing exactly how it works — before the next headline hits.Watch how Tim Sykes trades AI headlines for real gains 9/30/2021492,800 shares $22.67 million -9.0%N/A2.1 $46.01 9/15/2021541,500 shares $24.59 million +6.0%N/A2 $45.41 8/31/2021510,900 shares $22.35 million -28.7%N/A1.9 $43.75 8/13/2021716,600 shares $25.21 million -6.3%N/A2.7 $35.18 7/30/2021764,500 shares $28.78 million +7.1%2.9%3 $37.65 7/15/2021713,800 shares $24.44 million -26.2%2.7%2.7 $34.24 6/30/2021967,200 shares $28.94 million -6.1%3.7%3.7 $29.92 6/15/20211,030,000 shares $23.92 million +1.0%3.8%4.9 $23.22 5/28/20211,020,000 shares $20.69 million +6.5%3.8%4.6 $20.28 5/14/2021957,700 shares $16.92 million +8.2%N/A4.1 $17.67 4/30/2021885,300 shares $17.85 million +24.5%N/A3.1 $20.16 4/15/2021711,100 shares $13.50 million +9.5%N/A2.7 $18.99 3/31/2021649,700 shares $12.66 million +10.0%N/A2.5 $19.49 3/15/2021590,500 shares $13.17 million +5.8%N/A2.2 $22.30 2/26/2021558,400 shares $12.54 million +11.3%N/A2.2 $22.45 2/12/2021501,800 shares $12.37 million +4.9%N/A1.9 $24.65 1/29/2021478,200 shares $10.00 million -11.4%N/A2.3 $20.91 1/15/2021539,400 shares $10.77 million +8.2%N/A2.7 $19.97 12/31/2020498,600 shares $8.28 million +56.8%N/A2.7 $16.60 12/15/2020318,000 shares $5.03 million +18.8%N/A1.3 $15.83 11/30/2020267,600 shares $3.99 million +8.1%N/A1.1 $14.92 11/15/2020247,500 shares $2.76 million -32.1%N/A1.2 $11.16 10/30/2020364,400 shares $4.11 million -22.6%N/A1.8 $11.27 10/15/2020470,900 shares $5.19 million -7.7%N/A2.4 $11.02 9/30/2020510,300 shares $5.59 million +27.1%N/A2.6 $10.95 9/15/2020401,500 shares $3.96 million -7.6%N/A2.4 $9.86 8/31/2020434,500 shares $3.69 million -1.7%N/A2.8 $8.50 8/14/2020442,200 shares $3.46 million -7.3%N/A2.7 $7.82 7/31/2020476,900 shares $3.03 million -9.4%N/A3.1 $6.35 ASPN Short Interest - Frequently Asked Questions What is Aspen Aerogels' current short interest? Short interest is the volume of Aspen Aerogels shares that have been sold short but have not yet been covered or closed out. As of June 30th, investors have sold 8,940,000 shares of ASPN short. 11.38% of Aspen Aerogels' shares are currently sold short. Learn More on Aspen Aerogels' current short interest. What is a good short interest ratio for Aspen Aerogels? 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. ASPN shares currently have a short interest ratio of 5.0. Learn More on Aspen Aerogels's short interest ratio. Which institutional investors are shorting Aspen Aerogels? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Aspen Aerogels: DLD Asset Management LP, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, DLD Asset Management LP, and 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 Aspen Aerogels? 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. 11.38% of Aspen Aerogels' floating shares are currently sold short. Is Aspen Aerogels' short interest increasing or decreasing? Aspen Aerogels saw a decrease in short interest during the month of June. As of June 30th, there was short interest totaling 8,940,000 shares, a decrease of 0.8% from the previous total of 9,010,000 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. How does Aspen Aerogels' short interest compare to its competitors? 11.38% of Aspen Aerogels' shares are currently sold short. Here is how the short interest of companies in the industry of "wholesale" compare to Aspen Aerogels: Global Partners LP (1.87%), World Kinect Corporation (4.50%), Distribution Solutions Group, Inc. (4.76%), Global Industrial Company (4.85%), CrossAmerica Partners LP (0.36%), Vestis Corporation (32.21%), Ituran Location and Control Ltd. (0.73%), Ryerson Holding Corporation (3.73%), SunOpta, Inc. (4.36%), MGP Ingredients, Inc. (11.71%), 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 Aspen Aerogels stock? Short selling ASPN is an investing strategy that aims to generate trading profit from Aspen Aerogels as its price is falling. ASPN shares are trading up $0.36 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 Aspen Aerogels? A short squeeze for Aspen Aerogels 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 ASPN, which in turn drives the price of the stock up even further. How often is Aspen Aerogels' 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 ASPN, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies Global Partners Short Interest World Kinect Short Interest Distribution Solutions Group Short Interest Global Industrial Short Interest CrossAmerica Partners Short Interest Vestis Short Interest Ituran Location and Control Short Interest Ryerson Short Interest SunOpta Short Interest MGP Ingredients Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:ASPN) was last updated on 7/24/2025 by MarketBeat.com Staff From Our PartnersBuffett to put 90% of his money in this one stock?CPA and CFA says you have WAY too many stocks - just buy these 3 After years working at the biggest accoun...Altimetry | SponsoredThink you missed gold’s boom? Think againIf you've been watching gold's historic run and wondering if it's too late… I've got good news. 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