Fortinet (FTNT) Short Interest Ratio & Short Volume $86.46 +1.54 (+1.81%) Closing price 10/8/2025 04:00 PM EasternExtended Trading$86.08 -0.38 (-0.44%) As of 08:30 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 InterestSustainabilityTrendsBuy This Stock Fortinet Short Interest DataFortinet (FTNT) has a short interest of 19.43 million shares. This marks a -4.71% decrease in short interest from the previous month. The short interest ratio (days to cover) is 2.7, indicating that it would take 2.7 days of the average trading volume of 5.91 million shares to cover all short positions.Current Short Interest19,430,000 sharesPrevious Short Interest20,390,000 sharesChange Vs. Previous Month-4.71%Dollar Volume Sold Short$1.57 billionShort Interest Ratio2.7 Days to CoverLast Record DateSeptember 15, 2025Outstanding Shares766,270,000 sharesPercentage of Shares Shorted2.54%Today's Trading Volume5,607,980 sharesAverage Trading Volume5,906,854 sharesToday's Volume Vs. Average95% Short Selling Fortinet? Sign up to receive the latest short interest report for Fortinet 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 ChartFTNT Short Interest Over TimeFTNT Days to Cover Over TimeFTNT Percentage of Float Shorted Over Time Fortinet Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 9/15/202519,430,000 shares $1.57 billion -4.7%N/A2.7 $81.00 8/31/202520,390,000 shares $1.61 billion +12.7%3.2%3.1 $78.77 8/15/202518,090,000 shares $1.43 billion +3.2%N/A2.8 $79.11 7/31/202517,530,000 shares $1.75 billion -5.5%2.8%3.1 $99.90 7/15/202518,550,000 shares $1.95 billion -6.3%N/A4 $104.93 6/30/202519,790,000 shares $2.09 billion +12.2%3.1%4 $105.72 6/15/202517,640,000 shares $1.78 billion +18.5%2.8%3.5 $100.83 5/31/202514,890,000 shares $1.52 billion -6.2%2.4%2.9 $102.02 5/15/202515,880,000 shares $1.63 billion -22.6%2.5%3.1 $102.56 4/30/202520,520,000 shares $2.13 billion +6.5%N/A3.8 $103.76 Get the Latest News and Ratings for FTNT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Fortinet and its competitors with MarketBeat's FREE daily newsletter. 4/15/202519,260,000 shares $1.91 billion -11.7%3.1%3.8 $99.20 3/31/202521,810,000 shares $2.10 billion +14.0%3.5%4.3 $96.26 3/15/202519,140,000 shares $1.84 billion +6.6%3.0%4.2 $96.25 2/28/202517,960,000 shares $1.94 billion +32.2%2.9%4 $108.01 2/15/202513,590,000 shares $1.52 billion -10.4%2.2%3.1 $111.64 1/31/202515,170,000 shares $1.53 billion +1.2%N/A3.1 $100.88 1/15/202514,990,000 shares $1.39 billion -6.6%N/A3.3 $93.06 12/31/202416,040,000 shares $1.52 billion +5.0%N/A3.6 $94.48 12/15/202415,280,000 shares $1.50 billion +19.8%N/A3.4 $97.95 11/30/202412,750,000 shares $1.21 billion +1.0%N/A2.7 $95.05 11/15/202412,620,000 shares $1.19 billion +0.4%N/A2.7 $94.20 10/31/202412,570,000 shares $988.76 million -2.9%N/A2.9 $78.66 10/15/202412,950,000 shares $1.07 billion -0.3%N/A2.7 $82.64 9/30/202412,990,000 shares $1.01 billion -10.5%N/A2.5 $77.55 9/15/202414,520,000 shares $1.09 billion +5.8%N/A2.7 $75.01 8/31/202413,720,000 shares $1.05 billion +5.7%N/A2.5 $76.71 8/15/202412,980,000 shares $952.73 million -24.1%N/A2.3 $73.40 7/31/202417,110,000 shares $993.06 million +0.7%N/A3 $58.04 7/15/202417,000,000 shares $1.02 billion +5.9%N/A3 $59.90 6/30/202416,060,000 shares $967.94 million +12.6%N/A3 $60.27 6/15/202414,260,000 shares $866.72 million -14.2%N/A2.6 $60.78 5/31/202416,610,000 shares $985.31 million +30.2%N/A3.2 $59.32 5/15/202412,760,000 shares $774.91 million -20.9%N/A2.5 $60.73 4/30/202416,140,000 shares $1.02 billion +15.5%N/A2.8 $63.18 4/15/202413,970,000 shares $904.28 million +5.9%N/A2.4 $64.73 3/31/202413,190,000 shares $901.01 million -0.8%N/A2.1 $68.31 3/15/202413,300,000 shares $887.38 million +3.4%N/A2.2 $66.72 2/29/202412,860,000 shares $888.75 million +16.7%N/A1.9 $69.11 2/15/202411,020,000 shares $774.27 million -3.3%N/A1.6 $70.26 1/31/202411,400,000 shares $735.19 million -1.6%N/A1.6 $64.49 1/15/202411,580,000 shares $723.06 million -9.3%N/A1.6 $62.44 12/31/202312,770,000 shares $747.43 million -18.2%N/A1.8 $58.53 12/15/202315,610,000 shares $902.73 million +26.8%N/A2.2 $57.83 11/30/202312,310,000 shares $647.01 million +6.7%N/A1.8 $52.56 11/15/202311,540,000 shares $589.23 million +1.6%N/A1.8 $51.06 10/31/202311,360,000 shares $649.45 million -14.1%N/A1.7 $57.17 10/15/202313,230,000 shares $764.16 million +13.7%N/A2.1 $57.76 9/30/202311,640,000 shares $683.04 million +34.1%N/A1.9 $58.68 9/15/20238,680,000 shares $529.65 million -12.0%N/A1.5 $61.02 8/31/20239,860,000 shares $593.67 million -5.2%N/A1.6 $60.21 8/15/202310,400,000 shares $615.37 million +8.8%N/A1.6 $59.17 7/31/20239,560,000 shares $743.00 million -5.6%N/A1.6 $77.72 7/15/202310,130,000 shares $799.46 million -5.2%N/A1.9 $78.92 6/30/202310,690,000 shares $808.06 million -23.0%N/A2.1 $75.59 6/15/202313,880,000 shares $1.02 billion +9.1%N/A2.8 $73.59 5/31/202312,720,000 shares $869.16 million +17.3%N/A2.7 $68.33 5/15/202310,840,000 shares $743.19 million -4.9%N/A2.5 $68.56 4/30/202311,400,000 shares $718.77 million -4.8%N/A2.4 $63.05 4/15/202311,970,000 shares $814.80 million -6.4%N/A2.5 $68.07 3/31/202312,790,000 shares $850.02 million -5.3%N/A2.5 $66.46 3/15/202313,510,000 shares $815.87 million -0.7%N/A2.7 $60.39 2/28/202313,610,000 shares $808.98 million +2.6%N/A2.6 $59.44 2/15/202313,270,000 shares $833.49 million -1.8%N/A2.5 $62.81 1/31/202313,510,000 shares $707.11 million -15.0%N/A2.5 $52.34 1/15/202315,900,000 shares $777.03 million +9.4%N/A3 $48.87 12/30/202214,530,000 shares $710.37 million +11.2%N/A2.7 $48.89 12/15/202213,070,000 shares $681.86 million +12.1%N/A2.4 $52.17 11/30/202211,660,000 shares $619.85 million +12.6%N/A2.2 $53.16 11/15/202210,360,000 shares $582.23 million +19.2%N/A1.9 $56.20 10/31/20228,690,000 shares $496.72 million -4.4%N/A1.6 $57.16 10/15/20229,090,000 shares $437.50 million -19.5%N/A1.7 $48.13 9/30/202211,290,000 shares $554.68 million -7.2%N/A2.1 $49.13 9/15/202212,160,000 shares $617.97 million +33.3%N/A2.3 $50.82 8/31/20229,120,000 shares $444.05 million +7.9%N/A1.7 $48.69 8/15/20228,450,000 shares $456.98 million -16.6%N/A1.5 $54.08 7/31/202210,130,000 shares $604.25 million -12.0%N/A1.6 $59.65 7/15/202211,510,000 shares $693.13 million +10.7%N/A1.8 $60.22 6/30/202210,400,000 shares $588.43 million -12.5%N/A1.6 $56.58 6/15/202211,890,000 shares $659.94 million +335.5%N/A1.8 $55.50 5/31/20222,730,000 shares $803.00 million +3.8%2.0%2 $294.14 5/15/20222,630,000 shares $740.48 million +42.9%2.0%1.8 $281.55 4/30/20221,840,000 shares $531.78 million -6.6%1.4%1.4 $289.01 4/15/20221,970,000 shares $653.57 million -7.5%1.5%1.5 $331.76 3/31/20222,130,000 shares $727.91 million -9.8%1.6%1.5 $341.74 3/15/20222,360,000 shares $668.64 million +4.4%1.8%1.6 $283.32 2/28/20222,260,000 shares $778.62 million -4.2%1.7%1.4 $344.52 2/15/20222,360,000 shares $760.91 million -15.4%1.7%1.5 $322.42 1/31/20222,790,000 shares $829.30 million +3.3%2.1%1.9 $297.24 1/15/20222,700,000 shares $843.86 million +4.3%N/A1.9 $312.54 12/31/20212,590,000 shares $930.85 million +22.2%1.9%2 $359.40 12/15/20212,120,000 shares $713.97 million +19.1%1.6%1.8 $336.78 11/30/20211,780,000 shares $591.16 million -3.8%1.3%1.8 $332.11 11/15/20211,850,000 shares $619.99 million -13.6%1.4%2.1 $335.13 10/29/20212,140,000 shares $719.77 million -4.0%1.6%2.3 $336.34 10/15/20212,230,000 shares $703.10 million +5.2%1.6%2.4 $315.29 9/30/20212,120,000 shares $619.12 million -0.5%1.6%2.2 $292.04 9/15/20212,130,000 shares $642.26 million +15.1%1.6%2.2 $301.53 8/31/20211,850,000 shares $583.01 million -14.4%1.4%2 $315.14 8/13/20212,160,000 shares $668.15 million +14.3%1.6%2.4 $309.33 7/30/20211,890,000 shares $514.53 million -2.6%1.4%2 $272.24 7/15/20211,940,000 shares $497.22 million -10.2%1.4%2 $256.30 6/30/20212,160,000 shares $514.49 million -3.1%1.6%2.3 $238.19 6/15/20212,230,000 shares $513.03 million -3.0%1.6%2.3 $230.06 5/28/20212,300,000 shares $502.64 million -11.9%1.7%2.1 $218.54 5/14/20212,610,000 shares $517.80 million -3.7%1.9%2.1 $198.39 4/30/20212,710,000 shares $529.72 million -14.0%2.0%2.1 $195.47 4/15/20213,150,000 shares $627.86 million -20.7%2.3%2.5 $199.32 3/31/20213,970,000 shares $719.88 million -22.8%2.9%3.1 $181.33 3/15/20215,140,000 shares $968.12 million +33.9%3.8%4 $188.35 2/26/20213,840,000 shares $645.12 million +34.7%2.8%3.2 $168.00 2/12/20212,850,000 shares $464.58 million +4.4%2.1%2.6 $163.01 1/29/20212,730,000 shares $405.49 million -6.2%2.0%2.5 $148.53 1/15/20212,910,000 shares $429.31 million -3.6%2.2%2.6 $147.53 12/31/20203,020,000 shares $447.02 million -8.2%2.2%2.5 $148.02 12/15/20203,290,000 shares $429.97 million -1.5%2.4%2.7 $130.69 11/30/20203,340,000 shares $413.46 million -2.6%2.5%2.8 $123.79 11/15/20203,430,000 shares $397.61 million +0.9%2.5%2.7 $115.92 10/30/20203,400,000 shares $401.20 million -33.6%2.5%2.7 $118.00 10/15/20205,120,000 shares $666.32 million +1.0%3.8%4.1 $130.14 FTNT Short Interest - Frequently Asked Questions What is Fortinet's current short interest? Short interest is the volume of Fortinet shares that have been sold short but have not yet been closed out or covered. As of September 15th, investors have sold 19,430,000 shares of FTNT short. Learn More on Fortinet's current short interest. What is a good short interest ratio for Fortinet? 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. FTNT shares currently have a short interest ratio of 3.0. Learn More on Fortinet's short interest ratio. Which institutional investors are shorting Fortinet? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of Fortinet: Hudson Bay Capital Management LP, LMR Partners LLP, Hudson Bay Capital Management LP, Group One Trading LLC, Cubist Systematic Strategies LLC, BNP Paribas Financial Markets, Bank of America Corp DE, Jane Street Group LLC, Volterra Technologies LP, Squarepoint Ops LLC, Qube Research & Technologies Ltd, Capula Management Ltd, Walleye Capital LLC, Walleye Trading LLC, Capital Fund Management S.A., Eisler Capital Management Ltd., JPMorgan Chase & Co., Citigroup Inc., Garda Capital Partners LP, Allianz Asset Management GmbH, Twin Tree Management LP, Concurrent Investment Advisors LLC, and IMC Chicago LLC. These positions are disclosed in Form 13F filings with the Securities and Exchange Commission. Is Fortinet's short interest increasing or decreasing? Fortinet saw a drop in short interest in September. As of September 15th, there was short interest totaling 19,430,000 shares, a drop of 4.7% from the previous total of 20,390,000 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 Fortinet's short interest compare to its competitors? Here is how the short interest of companies compare to Fortinet: Airbnb, Inc. (3.49%), CrowdStrike (2.56%), CyberArk Software Ltd. (3.18%), Palo Alto Networks, Inc. (7.47%), The Trade Desk (7.94%), Zscaler, Inc. (5.83%), ServiceNow, Inc. (1.44%), Axon Enterprise, Inc (2.20%), CommVault Systems, Inc. (5.21%), Qualys, Inc. (8.40%), 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 ($8.81 billion), Canadian Natural Resources Limited ($5.82 billion), Reddit Inc. ($5.19 billion), Coinbase Global, Inc. ($4.52 billion), Robinhood Markets, Inc. ($4.30 billion), Charter Communications, Inc. ($3.75 billion), CoreWeave Inc. ($3.66 billion), Seagate Technology Holdings PLC ($3.57 billion), Live Nation Entertainment, Inc. ($3.33 billion), and Rocket Lab Corporation ($3.26 billion). View all of the most shorted stocks. What does it mean to sell short Fortinet stock? Short selling FTNT is an investing strategy that aims to generate trading profit from Fortinet as its price is falling. FTNT shares are trading up $1.54 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 Fortinet? A short squeeze for Fortinet 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 FTNT, which in turn drives the price of the stock up even further. How often is Fortinet'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 FTNT, twice per month. The most recent reporting period available is September, 15 2025. More Short Interest Resources from MarketBeat Related Companies ABNB Short Interest CRWD Short Interest CYBR Short Interest PANW Short Interest TTD Short Interest ZS Short Interest NOW Short Interest AXON Short Interest CVLT Short Interest QLYS Short Interest Short Interest Tools Stocks to Short Largest Short Interest Positions Short Interest Increases Short Interest Decreases Short Interest Reporting Dates This page (NASDAQ:FTNT) was last updated on 10/9/2025 by MarketBeat.com Staff From Our PartnersBitcoin grabs headlines, but smart money likes this tokenBitcoin grabs headlines, but smart money likes this token My research team has identified the token positio...Crypto 101 Media | SponsoredMagnificent 7 being replaced by the “Hidden 7”?BULLISH: It's time to buy this 'hidden' AI stock An award-winning stock-rating system has turned BULLISH on...Chaikin Analytics | SponsoredBuilding The Infrastructure for the Coming Financial ResetWhile China pushes nearly $1 trillion through its new digital currency, one emerging company is quietly buildi...Intellistake | SponsoredCapital Gains Tax Strategies for SeniorsCapital gains taxes can take a bite out of your retirement income—unless you have a smart strategy. 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