Fastly (FSLY) Short Interest Ratio & Short Volume $7.69 -0.06 (-0.77%) As of 05/20/2025 03:58 PM Eastern 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 9.85 million shares. This marks a 1.23% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.0, indicating that it would take 3.0 days of the average trading volume of 3.12 million shares to cover all short positions.Current Short Interest9,850,000 sharesPrevious Short Interest9,730,000 sharesChange Vs. Previous Month+1.23%Dollar Volume Sold Short$56.64 millionShort Interest Ratio3.0 Days to CoverLast Record DateApril 30, 2025Outstanding Shares144,686,000 sharesPercentage of Shares Shorted6.81%Today's Trading Volume1,586,998 sharesAverage Trading Volume3,117,468 sharesToday's Volume Vs. Average51% 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 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 4/30/20259,850,000 shares $56.64 million +1.2%N/A3 $5.75 4/15/20259,730,000 shares $51.91 million -6.4%7.4%3.1 $5.34 3/31/202510,400,000 shares $66.09 million -1.2%7.9%3.3 $6.36 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 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. 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 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 $20.54Market Panic: Trump Just Dropped a Bomb on Your Stocks (Ad)tock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tariffs just lit the fuse. Millions of investors are blindsided as stocks plunge… but this is only Phase 1. If you're still holding the wrong assets, you could lose 30% or more in the coming weeks.Don't wait for the next drop to wipe you out. Get the FREE Guide Before Markets Open Tomorrow 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 $18.37 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 $42.11Market Panic: Trump Just Dropped a Bomb on Your Stocks (Ad)tock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tariffs just lit the fuse. Millions of investors are blindsided as stocks plunge… but this is only Phase 1. If you're still holding the wrong assets, you could lose 30% or more in the coming weeks.Don't wait for the next drop to wipe you out. Get the FREE Guide Before Markets Open Tomorrow 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 $59.60 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 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 closed out or covered. As of April 30th, investors have sold 9,850,000 shares of FSLY 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: Jane Street Group LLC, Millennium Management LLC, PEAK6 LLC, Walleye Trading LLC, Simplex Trading LLC, Wolverine Asset Management LLC, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Fastly's short interest increasing or decreasing? Fastly saw a increase in short interest during the month of April. As of April 30th, there was short interest totaling 9,850,000 shares, an increase of 1.2% from the previous total of 9,730,000 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? Here is how the short interest of companies in the industry of "computer software" compare to Fastly: Box, Inc. (9.52%), Intapp, Inc. (4.36%), Rumble Inc. (11.65%), SoundHound AI, Inc. (31.25%), Asana, Inc. (10.70%), Tenable Holdings, Inc. (3.49%), Paycor HCM, Inc. (6.81%), Workiva Inc. (3.85%), Kingsoft Cloud Holdings Limited (3.83%), AvePoint, Inc. (5.64%), Which stocks are the most shorted right now? As of the most recent reporting period, the following stocks had the largest short interest positions: Spotify Technology S.A. ($4.67 billion), Charter Communications, Inc. ($4.58 billion), Capital One Financial Co. ($4.47 billion), The Kroger Co. ($2.56 billion), Reddit, Inc. ($2.23 billion), Rivian Automotive, Inc. ($2.16 billion), Live Nation Entertainment, Inc. ($1.90 billion), SoFi Technologies, Inc. ($1.85 billion), Zscaler, Inc. ($1.75 billion), and Omnicom Group Inc. ($1.75 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 $0.06 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 appreciates 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 April, 30 2025. More Short Interest Resources from MarketBeat Related Companies BOX Short Interest Data Intapp Short Interest Data Rumble Short Interest Data SoundHound AI Short Interest Data Asana Short Interest Data Tenable Short Interest Data Paycor HCM Short Interest Data Workiva Short Interest Data Kingsoft Cloud Short Interest Data AvePoint 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 5/21/2025 by MarketBeat.com Staff From Our PartnersMarket Panic: Trump Just Dropped a Bomb on Your Stockstock Market Panic: Trump Just Dropped a Bomb on Your Stocks The market is in freefall—and Trump's new tarif...American Alternative | SponsoredGold Hits New Highs as Global Markets SpiralWhen Trump took office in 2017, gold was just $1,100 an ounce. 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