Fastenal (FAST) Short Interest Ratio & Short Volume $47.48 +0.70 (+1.50%) Closing price 08/7/2025 04:00 PM EasternExtended Trading$47.31 -0.17 (-0.36%) As of 08:13 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 ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Fastenal Short Interest DataFastenal (FAST) has a short interest of 25.33 million shares. This marks a -9.05% decrease in short interest from the previous month. The short interest ratio (days to cover) is 4.1, indicating that it would take 4.1 days of the average trading volume of 7.18 million shares to cover all short positions.Current Short Interest25,330,000 sharesPrevious Short Interest27,850,000 sharesChange Vs. Previous Month-9.05%Dollar Volume Sold Short$1.14 billionShort Interest Ratio4.1 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares1,147,640,000 sharesPercentage of Shares Shorted2.21%Today's Trading Volume8,851,986 sharesAverage Trading Volume7,182,826 sharesToday's Volume Vs. Average123% Short Selling Fastenal? Sign up to receive the latest short interest report for Fastenal and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartFAST Short Interest Over TimeFAST Days to Cover Over TimeFAST Percentage of Float Shorted Over Time Fastenal Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 7/15/202525,330,000 shares $1.14 billion -9.1%N/A4.1 $45.13 6/30/202527,850,000 shares $1.17 billion -6.5%2.4%4.2 $42.00 6/15/202529,770,000 shares $1.26 billion +6.3%2.6%4.5 $42.17 5/31/202528,010,000 shares $1.16 billion -1.4%4.9%4 $41.31 5/15/202528,410,000 shares $1.16 billion +93.5%5.0%3.8 $40.94 4/30/202514,680,000 shares $1.19 billion +1.6%2.6%4 $80.97 4/15/202514,450,000 shares $1.18 billion +1.6%2.5%4 $81.65 3/31/202514,220,000 shares $1.10 billion +3.6%2.5%4 $77.55 3/15/202513,730,000 shares $1.03 billion +0.6%2.4%4.2 $75.26 2/28/202513,650,000 shares $1.03 billion +1.0%2.4%4.4 $75.73 Get the Latest News and Ratings for FAST and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Fastenal and its competitors with MarketBeat's FREE daily newsletter. 2/15/202513,520,000 shares $1.01 billion +2.7%2.4%4.8 $74.78 1/31/202513,160,000 shares $963.84 million +7.5%2.3%4.6 $73.24 1/15/202512,240,000 shares $909.06 million +1.6%2.1%4.3 $74.27 12/31/202412,050,000 shares $866.52 million +6.5%2.1%4.3 $71.91 12/15/202411,310,000 shares $887.50 million -6.0%2.0%4.1 $78.47 11/30/202412,030,000 shares $1.01 billion -5.9%2.1%4.6 $83.56 11/15/202412,780,000 shares $1.05 billion -3.7%2.2%4.8 $81.85 10/31/202413,270,000 shares $1.04 billion -4.3%2.3%5.2 $78.18 10/15/202413,860,000 shares $1.07 billion +4.8%2.4%5.4 $76.91 9/30/202413,220,000 shares $944.17 million -9.9%2.3%5.1 $71.42 9/15/202414,670,000 shares $1.02 billion +3.8%2.6%5.4 $69.82 8/31/202414,130,000 shares $964.80 million +6.1%2.5%5 $68.28 8/15/202413,320,000 shares $887.51 million -4.1%2.3%4.3 $66.63 7/31/202413,890,000 shares $982.72 million -13.0%2.4%4.3 $70.75 7/15/202415,960,000 shares $1.08 billion +11.2%2.8%4.8 $67.83 6/30/202414,350,000 shares $901.75 million -21.6%2.5%4.1 $62.84 6/15/202418,300,000 shares $1.15 billion +35.9%3.2%5.2 $63.05 5/31/202413,470,000 shares $888.75 million +5.0%2.4%3.7 $65.98 5/15/202412,830,000 shares $859.35 million -16.3%2.3%3.6 $66.98 4/30/202415,320,000 shares $1.04 billion -10.6%2.7%4.2 $67.94 4/15/202417,140,000 shares $1.19 billion -8.6%3.0%4.4 $69.39 3/31/202418,750,000 shares $1.45 billion +2.2%3.3%4.8 $77.14 3/15/202418,350,000 shares $1.38 billion -1.6%3.2%4.8 $75.03 2/29/202418,640,000 shares $1.36 billion -1.6%3.3%4.7 $73.01 2/15/202418,950,000 shares $1.33 billion -3.3%3.3%5 $70.15 1/31/202419,600,000 shares $1.34 billion +7.3%3.4%5.3 $68.23 1/15/202418,260,000 shares $1.16 billion -5.3%3.2%5.1 $63.52 12/31/202319,290,000 shares $1.25 billion +3.1%3.4%5.4 $64.77 12/15/202318,710,000 shares $1.20 billion +5.0%3.3%5.3 $64.16 11/30/202317,820,000 shares $1.07 billion +6.3%3.1%5.3 $59.97Critical AI announcement set to ignite AI 2.0 (Ad)While the market chops sideways and headlines dominate the news cycle, a small group of traders is quietly taking advantage of a reliable volatility pattern. A veteran trader just revealed how his strategy cuts through the noise—using fast trades, clear rules, and no overnight risk.Click here to see how this proven pattern works—and why it’s built for markets like this. 11/15/202316,760,000 shares $1.01 billion +7.8%2.9%5.1 $60.11 10/31/202315,550,000 shares $907.19 million +2.5%2.7%4.9 $58.34 10/15/202315,170,000 shares $912.02 million -1.1%2.7%4.9 $60.12 9/30/202315,340,000 shares $838.18 million +1.2%2.7%5.1 $54.64 9/15/202315,160,000 shares $837.14 million -5.4%2.7%5.2 $55.22 8/31/202316,020,000 shares $922.43 million +3.4%2.8%5.2 $57.58 8/15/202315,490,000 shares $891.45 million +9.0%2.7%4.8 $57.55 7/31/202314,210,000 shares $832.85 million -8.0%2.5%4.4 $58.61 7/15/202315,450,000 shares $888.07 million +5.5%2.7%4.8 $57.48 6/30/202314,640,000 shares $863.61 million +0.8%2.6%4.6 $58.99 6/15/202314,520,000 shares $816.60 million +0.5%2.6%4.7 $56.24 5/31/202314,450,000 shares $778.13 million +1.9%2.5%4.5 $53.85 5/15/202314,180,000 shares $768.84 million No Change2.5%4.6 $54.22 4/30/202314,180,000 shares $763.45 million +6.1%2.5%4.5 $53.84 4/15/202313,370,000 shares $712.22 million -3.7%2.4%4 $53.27 3/31/202313,890,000 shares $749.23 million +4.0%2.4%4.2 $53.94 3/15/202313,360,000 shares $688.84 million -9.2%2.4%4 $51.56 2/28/202314,720,000 shares $758.96 million +5.8%2.6%4.4 $51.56 2/15/202313,910,000 shares $738.34 million -8.7%2.4%4.2 $53.08 1/31/202315,230,000 shares $769.88 million +5.6%2.7%4.5 $50.55 1/15/202314,420,000 shares $703.98 million +2.9%2.5%4.1 $48.82 12/30/202214,020,000 shares $663.43 million +6.1%2.5%4 $47.32 12/15/202213,220,000 shares $634.16 million +20.0%2.3%3.6 $47.97 11/30/202211,020,000 shares $567.64 million -8.6%1.9%3 $51.51 11/15/202212,060,000 shares $622.66 million -3.8%2.1%3.4 $51.63 10/31/202212,540,000 shares $606.06 million +4.0%2.2%3.6 $48.33 10/15/202212,060,000 shares $529.07 million -1.2%2.1%3.5 $43.87 9/30/202212,200,000 shares $561.69 million -5.9%2.1%3.6 $46.04 9/15/202212,960,000 shares $612.10 million -1.5%2.3%4 $47.23 8/31/202213,160,000 shares $662.34 million -1.6%2.3%4.2 $50.33 8/15/202213,380,000 shares $750.75 million -7.4%2.3%4.3 $56.11 7/31/202214,450,000 shares $742.15 million +21.9%2.5%4.4 $51.36 7/15/202211,850,000 shares $569.27 million -17.8%2.1%3.5 $48.04 6/30/202214,410,000 shares $719.35 million +10.9%2.5%4.3 $49.92 6/15/202213,000,000 shares $644.93 million -0.8%2.3%3.9 $49.61 5/31/202213,100,000 shares $701.64 million +2.6%2.3%3.9 $53.56 5/15/202212,770,000 shares $672.85 million +21.4%2.2%3.5 $52.69 4/30/202210,520,000 shares $581.86 million -13.5%1.8%2.9 $55.31 4/15/202212,160,000 shares $681.08 million -0.2%2.1%3.4 $56.01 3/31/202212,180,000 shares $723.49 million +0.6%2.1%3.5 $59.40 3/15/202212,110,000 shares $675.62 million +12.9%2.1%3.6 $55.79 2/28/202210,730,000 shares $552.17 million -23.6%1.9%3.1 $51.46 2/15/202214,040,000 shares $732.47 million +37.2%2.5%4.4 $52.17 1/31/202210,230,000 shares $579.84 million -8.3%1.8%3.3 $56.68 1/15/202211,150,000 shares $660.08 million -13.3%1.9%3.8 $59.20 12/31/202112,860,000 shares $823.81 million -4.4%2.2%4.6 $64.06 12/15/202113,450,000 shares $856.09 million +23.4%2.4%4.7 $63.65 11/30/202110,900,000 shares $644.95 million -10.9%1.9%3.9 $59.17 11/15/202112,230,000 shares $741.63 million -9.9%2.1%4.5 $60.64 10/29/202113,580,000 shares $775.15 million +0.2%2.4%5.1 $57.08Critical AI announcement set to ignite AI 2.0 (Ad)While the market chops sideways and headlines dominate the news cycle, a small group of traders is quietly taking advantage of a reliable volatility pattern. A veteran trader just revealed how his strategy cuts through the noise—using fast trades, clear rules, and no overnight risk.Click here to see how this proven pattern works—and why it’s built for markets like this. 10/15/202113,560,000 shares $755.83 million +21.0%2.4%5.1 $55.74 9/30/202111,210,000 shares $578.55 million -3.9%2.0%4 $51.61 9/15/202111,660,000 shares $626.84 million -9.8%2.0%4.2 $53.76 8/31/202112,920,000 shares $721.58 million -14.0%2.3%4.5 $55.85 8/13/202115,020,000 shares $830.16 million -2.3%2.6%5.3 $55.27 7/30/202115,370,000 shares $841.81 million -0.8%2.7%5.3 $54.77 7/15/202115,500,000 shares $829.72 million -1.2%2.7%5.2 $53.53 6/30/202115,680,000 shares $815.36 million +1.9%2.7%5 $52.00 6/15/202115,390,000 shares $793.51 million +10.4%2.7%5 $51.56 5/28/202113,940,000 shares $739.38 million -0.4%2.4%4.4 $53.04 5/14/202114,000,000 shares $745.36 million -4.4%2.5%4 $53.24 4/30/202114,650,000 shares $774.55 million -5.8%2.6%4.2 $52.87 4/15/202115,550,000 shares $778.43 million +0.7%2.7%4.5 $50.06 3/31/202115,450,000 shares $782.08 million +4.7%2.7%4.4 $50.62 3/15/202114,760,000 shares $695.93 million +5.6%2.6%4.3 $47.15 2/26/202113,980,000 shares $646.99 million +4.5%2.4%4.4 $46.28 2/12/202113,380,000 shares $629.80 million +8.5%2.3%4.3 $47.07 1/29/202112,330,000 shares $575.19 million -9.5%2.2%3.9 $46.65 1/15/202113,630,000 shares $685.86 million -10.7%2.4%4.4 $50.32 12/31/202015,260,000 shares $748.81 million +14.5%2.7%4.9 $49.07 12/15/202013,330,000 shares $656.10 million +0.3%2.3%4.3 $49.22 11/30/202013,290,000 shares $645.63 million -2.3%2.3%4 $48.58 11/15/202013,600,000 shares $646.41 million +1.4%2.4%4 $47.53 10/30/202013,410,000 shares $578.24 million -14.3%2.3%4.1 $43.12 10/15/202015,640,000 shares $703.02 million -0.5%2.7%4.7 $44.95 9/30/202015,710,000 shares $708.36 million -3.9%2.8%4.5 $45.09 9/15/202016,340,000 shares $730.07 million -5.4%2.9%4.4 $44.68 8/31/202017,280,000 shares $844.30 million +0.8%3.0%4.5 $48.86 8/14/202017,150,000 shares $823.03 million -4.3%3.0%4.4 $47.99 FAST Short Interest - Frequently Asked Questions What is Fastenal's current short interest? Short interest is the volume of Fastenal shares that have been sold short but have not yet been covered or closed out. As of July 15th, investors have sold 25,330,000 shares of FAST short. Learn More on Fastenal's current short interest. What is a good short interest ratio for Fastenal? 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. FAST shares currently have a short interest ratio of 4.0. Learn More on Fastenal's short interest ratio. Which institutional investors are shorting Fastenal? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Fastenal: Simplex Trading LLC, Allianz Asset Management GmbH, Twin Tree Management LP, Quaker Wealth Management LLC, Jane Street Group LLC, Goldman Sachs Group Inc., Cubist Systematic Strategies LLC, Twin Tree Management LP, BNP Paribas Financial Markets, PEAK6 LLC, Jane Street Group LLC, Walleye Trading LLC, Walleye Capital LLC, Capital Fund Management S.A., Arrowpoint Investment Partners Singapore Pte. Ltd., Simplex Trading LLC, Citigroup Inc., and Delta Accumulation LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Fastenal's short interest increasing or decreasing? Fastenal saw a decrease in short interest in July. As of July 15th, there was short interest totaling 25,330,000 shares, a decrease of 9.0% from the previous total of 27,850,000 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 Fastenal's short interest compare to its competitors? Here is how the short interest of companies compare to Fastenal: Tecnoglass Inc. (10.28%), AMETEK, Inc. (1.24%), Builders FirstSource, Inc. (6.37%), Graco Inc. (1.89%), GMS Inc. (3.21%), W.W. Grainger, Inc. (2.68%), The Home Depot, Inc. (1.08%), Illinois Tool Works Inc. (2.10%), Lowe's Companies, Inc. (1.36%), MSC Industrial Direct Company, Inc. (6.00%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Coinbase Global, Inc. ($5.11 billion), Charter Communications, Inc. ($4.76 billion), Reddit Inc. ($2.84 billion), SoFi Technologies, Inc. ($2.79 billion), Seagate Technology Holdings PLC ($2.79 billion), Live Nation Entertainment, Inc. ($2.67 billion), Rocket Lab Corporation ($2.49 billion), AST SpaceMobile, Inc. ($2.12 billion), Moderna, Inc. ($2.09 billion), and Omnicom Group Inc. ($2.04 billion). View all of the most shorted stocks. What does it mean to sell short Fastenal stock? Short selling FAST is an investing strategy that aims to generate trading profit from Fastenal as its price is falling. FAST shares are trading up $0.70 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 Fastenal? A short squeeze for Fastenal 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 FAST, which in turn drives the price of the stock up even further. How often is Fastenal'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 FAST, twice per month. The most recent reporting period available is July, 15 2025. More Short Interest Resources from MarketBeat Related Companies Tecnoglass Short Squeeze AMETEK Short Squeeze Builders FirstSource Short Squeeze Graco Short Squeeze GMS Short Squeeze W.W. Grainger Short Squeeze Home Depot Short Squeeze Illinois Tool Works Short Squeeze Lowe's Companies Short Squeeze MSC Industrial Direct Short Squeeze Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:FAST) was last updated on 8/8/2025 by MarketBeat.com Staff From Our PartnersAltucher: Trump’s Great Gain is startingNew Hampshire just launched a Strategic Crypto Reserve — and James Altucher says it’s the first sign that “Tru...Paradigm Press | SponsoredBREAKING: The House just passed 3 pro-crypto bills!THREE pro-crypto bills just passed the House! Now, experts believe altcoin season is officially here. Crypto 101 Media | SponsoredGENIUS Act: Cancel Your Money?A new law called the GENIUS Act could quietly trigger the most radical shift in American finance in decades. 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