Fastly (FSLY) Short Interest Ratio & Short Volume $6.71 -0.16 (-2.39%) Closing price 03/27/2025 03:59 PM EasternExtended Trading$6.77 +0.06 (+0.95%) As of 03/27/2025 07:37 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 ForecastsChartCompetitorsEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestSustainabilityTrendsBuy This Stock Fastly Short Interest DataFastly (FSLY) has a short interest of 10.53 million shares, representing 8.04% of the float (the number of shares available for trading by the public). This marks a 0.96% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.3, indicating that it would take 3.3 days of the average trading volume of 3.27 million shares to cover all short positions.Current Short Interest10,530,000 sharesPrevious Short Interest10,430,000 sharesChange Vs. Previous Month+0.96%Dollar Volume Sold Short$71.87 millionShort Interest Ratio3.3 Days to CoverLast Record DateMarch 15, 2025Outstanding Shares142,300,000 sharesShort Percent of Float8.04%Today's Trading Volume1,357,862 sharesAverage Trading Volume3,268,780 sharesToday's Volume Vs. Average42% Short Selling Fastly? Sign up to receive the latest short interest report for Fastly and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartFSLY Short Interest Over TimeFSLY Days to Cover Over TimeFSLY Percentage of Float Shorted Over Time Remove Ads Fastly Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 3/15/202510,530,000 shares $71.87 million +1.0%8.0%3.3 $6.83 2/28/202510,430,000 shares $70.77 million -4.4%8.0%3 $6.79 2/15/202510,910,000 shares $88.21 million +17.2%8.3%3.1 $8.09 1/31/20259,310,000 shares $97.34 million -7.3%N/A2.9 $10.46 1/15/202510,040,000 shares $94.78 million +8.4%N/A3.1 $9.44 12/31/20249,260,000 shares $87.41 million -8.5%N/A2.9 $9.44 12/15/202410,120,000 shares $106.06 million +2.1%N/A3.2 $10.48 11/30/20249,910,000 shares $84.04 million -2.8%N/A3.2 $8.48 11/15/202410,200,000 shares $65.28 million -13.9%N/A3.9 $6.40 10/31/202411,840,000 shares $85.60 million -4.2%N/A4.1 $7.23 Get the Latest News and Ratings for FSLY and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Fastly and its competitors with MarketBeat's FREE daily newsletter. 10/15/202412,360,000 shares $89.24 million -14.1%N/A4 $7.22 9/30/202414,390,000 shares $108.93 million -2.2%N/A4.5 $7.57 9/15/202414,720,000 shares $98.62 million +3.0%N/A4.5 $6.70 8/31/202414,290,000 shares $86.03 million -7.3%N/A4.3 $6.02 8/15/202415,410,000 shares $96.70 million -7.1%N/A4.5 $6.28 7/31/202416,590,000 shares $134.54 million +2.0%N/A5.2 $8.11 7/15/202416,270,000 shares $123.73 million +1.0%N/A4.4 $7.61 6/30/202416,110,000 shares $118.73 million -1.4%N/A4.4 $7.37 6/15/202416,330,000 shares $117.58 million +17.2%N/A4.3 $7.20 5/31/202413,930,000 shares $109.21 million -3.1%N/A3.7 $7.84 5/15/202414,370,000 shares $126.46 million +14.6%N/A3.5 $8.80 4/30/202412,540,000 shares $158.69 million +9.1%N/A2.6 $12.66 4/15/202411,490,000 shares $150.75 million +12.8%N/A2.8 $13.12 3/31/202410,190,000 shares $132.16 million +14.1%N/A2.5 $12.97 3/15/20248,930,000 shares $112.52 million +7.2%N/A2.3 $12.60 2/29/20248,330,000 shares $118.45 million +5.7%N/A2.2 $14.22 2/15/20247,880,000 shares $128.52 million -0.4%N/A2.3 $16.31 1/31/20247,910,000 shares $159.03 million +6.9%N/A3 $20.11 1/15/20247,400,000 shares $132.24 million -10.8%N/A2.7 $17.87 12/31/20238,300,000 shares $147.74 million +4.0%N/A3.1 $17.80 12/15/20237,980,000 shares $149.19 million -14.1%N/A3 $18.70 11/30/20239,290,000 shares $154.21 million -6.1%N/A3.5 $16.60 11/15/20239,890,000 shares $171.00 million -0.3%N/A3.6 $17.29 10/31/20239,920,000 shares $145.63 million -11.0%N/A3.5 $14.68 10/15/202311,150,000 shares $163.91 million -12.7%N/A3.9 $14.70 9/30/202312,770,000 shares $244.80 million -9.4%N/A4.4 $19.17 9/15/202314,090,000 shares $289.34 million +0.6%N/A5.1 $20.54 8/31/202314,010,000 shares $333.30 million +4.2%N/A4.7 $23.79 8/15/202313,450,000 shares $251.65 million +17.9%N/A4.5 $18.71 7/31/202311,410,000 shares $209.60 million -1.6%N/A3.8 $18.37Elon Warns: Exec Order 14024 Targets Dollar (Ad)Executive Order 14024 is paving the way for irreversible damage to the dollar's value—threatening your wealth, your savings, and your retirement. When the dollar collapses, your savings could disappear overnight. With Trump threatening Russia with more sanctions, Russia is rushing to finalize their BRICS payment system aimed to destroy the U.S dollar.Go Here to Learn What's Happening and How to Prepare >> 7/15/202311,600,000 shares $203 million +4.6%N/A4 $17.50 6/30/202311,090,000 shares $174.78 million -3.3%N/A3.8 $15.76 6/15/202311,470,000 shares $203.13 million -6.9%N/A3.6 $17.71 5/31/202312,320,000 shares $200.51 million +1.1%N/A3.8 $16.28 5/15/202312,190,000 shares $161.03 million -5.7%N/A3.4 $13.21 4/30/202312,930,000 shares $191.11 million -5.6%N/A2.7 $14.78 4/15/202313,700,000 shares $218.24 million +10.8%N/A2.9 $15.93 3/31/202312,370,000 shares $219.69 million -9.5%N/A2.6 $17.76 3/15/202313,670,000 shares $199.17 million +4.7%N/A2.9 $14.57 2/28/202313,060,000 shares $181.40 million +1.5%N/A2.9 $13.89 2/15/202312,870,000 shares $178.51 million +10.8%N/A3 $13.87 1/31/202311,620,000 shares $120.27 million -1.7%N/A3.7 $10.35 1/15/202311,820,000 shares $114.18 million +6.3%N/A3.7 $9.66 12/30/202211,120,000 shares $91.07 million +3.6%N/A3.5 $8.19 12/15/202210,730,000 shares $95.50 million -3.7%N/A3.5 $8.90 11/30/202211,140,000 shares $107.61 million +3.9%N/A3.5 $9.66 11/15/202210,720,000 shares $114.70 million -9.7%N/A3.2 $10.70 10/31/202211,870,000 shares $100.78 million +0.9%N/A3.5 $8.49 10/15/202211,770,000 shares $87.57 million -12.9%N/A3.4 $7.44 9/30/202213,510,000 shares $123.75 million +2.8%N/A3.7 $9.16 9/15/202213,140,000 shares $129.56 million +0.5%N/A3.3 $9.86 8/31/202213,080,000 shares $122.30 million +22.1%N/A3.2 $9.35 8/15/202210,710,000 shares $130.02 million -15.1%N/A2.6 $12.14 7/31/202212,610,000 shares $143.38 million -2.4%N/A2.8 $11.37 7/15/202212,920,000 shares $150.39 million -10.3%N/A2.8 $11.64 6/30/202214,410,000 shares $167.30 million +2.3%N/A2.9 $11.61 6/15/202214,080,000 shares $154.32 million -1.1%N/A2.8 $10.96 5/31/202214,230,000 shares $185.70 million -11.9%N/A2.8 $13.05 5/15/202216,160,000 shares $198.44 million +15.5%N/A2.7 $12.28 4/30/202213,990,000 shares $222.44 million +2.5%N/A2.3 $15.90 4/15/202213,650,000 shares $257.71 million -2.9%N/A2.4 $18.88 3/31/202214,050,000 shares $244.19 million +1.3%N/A2.7 $17.38 3/15/202213,870,000 shares $190.02 million +11.5%N/A2.9 $13.70 2/28/202212,440,000 shares $231.38 million +20.2%11.8%2.8 $18.60 2/15/202210,350,000 shares $305.33 million -24.2%N/A2.6 $29.50 1/31/202213,650,000 shares $391.21 million -1.7%N/A5 $28.66 1/15/202213,880,000 shares $433.33 million -4.4%N/A4.7 $31.22 12/31/202114,520,000 shares $514.73 million -3.2%N/A4.8 $35.45 12/15/202115,000,000 shares $598.65 million -1.7%N/A5 $39.91 11/30/202115,260,000 shares $622.00 million +2.0%N/A5.2 $40.76 11/15/202114,960,000 shares $742.02 million -4.8%N/A5.1 $49.60 10/29/202115,710,000 shares $795.08 million -6.2%14.9%5.1 $50.61 10/15/202116,750,000 shares $751.91 million +0.3%15.9%4.3 $44.89 9/30/202116,700,000 shares $675.35 million +1.9%15.9%4.4 $40.44 9/15/202116,390,000 shares $714.11 million -3.0%15.6%4 $43.57 8/31/202116,900,000 shares $736.84 million -10.2%16.2%3.8 $43.60 8/13/202118,820,000 shares $792.51 million -12.8%18.1%3.9 $42.11 7/30/202121,580,000 shares $1.04 billion +9.7%22.8%4.2 $48.07 7/15/202119,680,000 shares $966.29 million +2.0%19.1%4.1 $49.10 6/30/202119,290,000 shares $1.15 billion -6.7%18.6%4 $59.60Elon Warns: Exec Order 14024 Targets Dollar (Ad)Executive Order 14024 is paving the way for irreversible damage to the dollar's value—threatening your wealth, your savings, and your retirement. When the dollar collapses, your savings could disappear overnight. With Trump threatening Russia with more sanctions, Russia is rushing to finalize their BRICS payment system aimed to destroy the U.S dollar.Go Here to Learn What's Happening and How to Prepare >> 6/15/202120,670,000 shares $1.13 billion -5.8%20.0%4.4 $54.53 5/28/202121,950,000 shares $1.04 billion -0.2%22.3%4.8 $47.19 5/14/202122,000,000 shares $879.56 million +11.1%N/A4.6 $39.98 4/30/202119,810,000 shares $1.29 billion -1.7%N/A3.8 $65.05 4/15/202120,150,000 shares $1.45 billion +6.6%N/A4.4 $71.92 3/31/202118,900,000 shares $1.23 billion -7.1%N/A3.9 $65.26 3/15/202120,340,000 shares $1.53 billion +5.7%N/A4 $75.16 2/26/202119,240,000 shares $1.39 billion +37.3%N/A3 $72.19 2/12/202114,010,000 shares $1.52 billion -0.9%N/A2.2 $108.26 1/29/202114,140,000 shares $1.55 billion -7.4%N/A2.3 $109.54 1/15/202115,270,000 shares $1.39 billion +0.5%N/A2 $91.12 12/31/202015,190,000 shares $1.37 billion -1.9%N/A1.6 $90.43 12/15/202015,480,000 shares $1.46 billion -11.6%N/A1.5 $94.25 11/30/202017,520,000 shares $1.48 billion -10.6%N/A1.7 $84.30 11/15/202019,600,000 shares $1.52 billion +31.4%N/A1.9 $77.71 10/30/202014,920,000 shares $1.02 billion +135.3%N/A1.4 $68.38 10/15/20206,340,000 shares $780.96 million -21.0%N/A0.6 $123.18 9/30/20208,020,000 shares $751.31 million -11.5%N/A0.8 $93.68 9/15/20209,060,000 shares $761.76 million +11.3%N/A0.8 $84.08 8/31/20208,140,000 shares $755.72 million -18.4%N/A0.7 $92.84 8/14/20209,970,000 shares $763.80 million +31.0%N/A0.9 $76.61 7/31/20207,610,000 shares $734.29 million -5.7%N/A0.8 $96.49 7/15/20208,070,000 shares $664.73 million +7.2%N/A1 $82.37 6/30/20207,530,000 shares $641.03 million +59.2%N/A1.1 $85.13 6/15/20204,730,000 shares $245.87 million +8.2%N/A1 $51.98 5/29/20204,370,000 shares $188.52 million +42.4%N/A1.3 $43.14 5/15/20203,070,000 shares $121.27 million +19.5%N/A1 $39.50 4/30/20202,570,000 shares $55.64 million -8.9%N/A1 $21.65 4/15/20202,820,000 shares $61.87 million -2.8%N/A1.3 $21.94 3/31/20202,900,000 shares $66.56 million -21.1%N/A1.5 $22.95 FSLY Short Interest - Frequently Asked Questions What is Fastly's current short interest? Short interest is the volume of Fastly shares that have been sold short but have not yet been covered or closed out. As of March 15th, investors have sold 10,530,000 shares of FSLY short. 8.04% of Fastly's shares are currently sold short. Learn More on Fastly's current short interest. What is a good short interest ratio for Fastly? 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. FSLY shares currently have a short interest ratio of 3.0. Learn More on Fastly's short interest ratio. Which institutional investors are shorting Fastly? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Fastly: GTS Securities LLC, Wolverine Trading LLC, Squarepoint Ops LLC, Millennium Management LLC, Group One Trading LLC, D. E. Shaw & Co. Inc., Citadel Advisors LLC, Balyasny Asset Management L.P., Jane Street Group LLC, Parallax Volatility Advisers L.P., Susquehanna International Group LLP, Concourse Financial Group Securities Inc., Walleye Trading LLC, Walleye Capital LLC, Barclays PLC, Capital Fund Management S.A., JPMorgan Chase & Co., and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. What is a good short interest percentage for Fastly? 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. 8.04% of Fastly's floating shares are currently sold short. Is Fastly's short interest increasing or decreasing? Fastly saw a increase in short interest in the month of March. As of March 15th, there was short interest totaling 10,530,000 shares, an increase of 1.0% from the previous total of 10,430,000 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 Fastly's short interest compare to its competitors? 8.04% of Fastly's shares are currently sold short. Here is how the short interest of companies in the industry of "computer software" compare to Fastly: Paycor HCM, Inc. (6.08%), Kingsoft Cloud Holdings Limited (6.04%), SoundHound AI, Inc. (32.75%), Braze, Inc. (5.99%), IAC Inc. (3.99%), ZoomInfo Technologies Inc. (5.30%), Grindr Inc. (9.60%), Zeta Global Holdings Corp. (12.36%), Clear Secure, Inc. (21.15%), JFrog Ltd. (3.22%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Invesco QQQ ($26.28 billion), iShares 20+ Year Treasury Bond ETF ($9.53 billion), MicroStrategy Incorporated ($8.50 billion), Apollo Global Management, Inc. ($4.86 billion), Super Micro Computer, Inc. ($4.85 billion), Charter Communications, Inc. ($4.28 billion), Capital One Financial Co. ($4.08 billion), AppLovin Co. ($3.82 billion), Canadian Natural Resources Limited ($3.78 billion), and Schlumberger Limited ($2.87 billion). View all of the most shorted stocks. What does it mean to sell short Fastly stock? Short selling FSLY is an investing strategy that aims to generate trading profit from Fastly as its price is falling. FSLY shares are trading down $0.16 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 Fastly? A short squeeze for Fastly 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 FSLY, which in turn drives the price of the stock up even further. How often is Fastly'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 FSLY, twice per month. The most recent reporting period available is March, 15 2025. More Short Interest Resources from MarketBeat Related Companies Paycor HCM Short Interest Data Kingsoft Cloud Short Interest Data SoundHound AI Short Interest Data Braze Short Interest Data IAC Short Interest Data ZoomInfo Technologies Short Interest Data Grindr Short Interest Data Zeta Global Short Interest Data Clear Secure Short Interest Data JFrog Short Interest Data Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NYSE:FSLY) was last updated on 3/28/2025 by MarketBeat.com Staff From Our PartnersElon Warns: Exec Order 14024 Targets DollarExecutive Order 14024 is paving the way for irreversible damage to the dollar's value—threatening your wealth,...Priority Gold | SponsoredWhy Elon put $51 million into thisWhy Elon Musk Just Invested $51 Million Into Brand New “Miracle Metal” Developed by MIT ScientistsTrue Market Insiders | SponsoredEx CIA predicts 40% “double crash” – April 11The scientists here don’t study deadly viruses… directed energy weapons… or even weather control technology… ...Paradigm Press | SponsoredA $6.9 Trillion Cash Tsunami Is Coming – Move Your Money NOWExpert: "Prepare For the Mother of All Melt-Ups" In the wake of Wall Street volatility, stock-picking legen...Stansberry Research | SponsoredTrump’s Bitcoin Reserve is No Accident…Bryce Paul believes this is the #1 coin to buy right now The catalyst behind this surge is a massive new b...Crypto 101 Media | SponsoredURGENT: Someone's Moving Gold Out of London...People who don’t understand the gold market are about to lose a lot of money. 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