ACI Worldwide (ACIW) Short Interest Ratio & Short Volume $44.26 +0.48 (+1.10%) Closing price 04:00 PM EasternExtended Trading$44.24 -0.02 (-0.04%) As of 07:55 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 InterestTrendsBuy This Stock ACI Worldwide Short Interest DataACI Worldwide (ACIW) has a short interest of 2.72 million shares, representing 2.63% of the float (the number of shares available for trading by the public). This marks a 10.57% increase in short interest from the previous month. The short interest ratio (days to cover) is 3.5, indicating that it would take 3.5 days of the average trading volume of 727,237 shares to cover all short positions.Current Short Interest2,720,000 sharesPrevious Short Interest2,460,000 sharesChange Vs. Previous Month+10.57%Dollar Volume Sold Short$124.88 millionShort Interest Ratio3.5 Days to CoverLast Record DateJune 30, 2025Outstanding Shares104,900,000 sharesFloat Size103,330,000 sharesShort Percent of Float2.63%Today's Trading Volume692,592 sharesAverage Trading Volume727,237 sharesToday's Volume Vs. Average95% Short Selling ACI Worldwide? Sign up to receive the latest short interest report for ACI Worldwide and its competitors with MarketBeat's FREE newsletter. Email Address Skip Charts & View Short Interest HistoryShort Interest ChartDays to Cover ChartShort Percent of Float ChartACIW Short Interest Over TimeACIW Days to Cover Over TimeACIW Percentage of Float Shorted Over Time ACI Worldwide Short Interest History Export to ExcelReport DateTotal Shares Sold ShortDollar Volume Sold ShortChange from Previous ReportPercentage of Float ShortedDays to CoverPrice on Report Date 6/30/20252,720,000 shares $124.88 million +10.6%2.6%3.5 $45.91 6/15/20252,460,000 shares $110.87 million -3.5%2.4%3.1 $45.07 5/31/20252,550,000 shares $117.68 million -13.0%2.5%3.2 $46.15 5/15/20252,930,000 shares $142.90 million +6.6%2.8%3.5 $48.77 4/30/20252,750,000 shares $146.74 million +1.1%2.7%3.7 $53.36 4/15/20252,720,000 shares $142.04 million +6.3%2.6%3.8 $52.22 3/31/20252,560,000 shares $140.06 million +1.6%2.5%3.5 $54.71 3/15/20252,520,000 shares $133.36 million +2.4%2.4%3.7 $52.92 2/28/20252,460,000 shares $141.08 million +6.0%2.4%3.6 $57.35 2/15/20252,320,000 shares $121.82 million +19.0%2.2%3.5 $52.51 Get the Latest News and Ratings for ACIW and Related StocksEnter your email address below to receive the latest news and analysts' ratings for ACI Worldwide and its competitors with MarketBeat's FREE daily newsletter. 1/31/20251,950,000 shares $104.42 million +2.1%1.9%2.7 $53.55 1/15/20251,910,000 shares $102.15 million -5.0%1.8%2.8 $53.48 12/31/20242,010,000 shares $104.34 million -11.8%1.9%2.9 $51.91 12/15/20242,280,000 shares $123.14 million -5.0%2.2%3.3 $54.01 11/30/20242,400,000 shares $136.37 million -2.0%2.3%3.5 $56.82 11/15/20242,450,000 shares $133.01 million +11.9%2.4%3.5 $54.29 10/31/20242,190,000 shares $107.75 million -7.2%2.1%3.2 $49.20 10/15/20242,360,000 shares $124.21 million +2.2%2.3%3.2 $52.63 9/30/20242,310,000 shares $117.58 million -1.7%2.2%3 $50.90 9/15/20242,350,000 shares $114.05 million +1.7%2.3%2.9 $48.53 8/31/20242,310,000 shares $116.33 million +1.3%2.2%3.1 $50.36 8/15/20242,280,000 shares $107.48 million -4.2%2.2%3.1 $47.14 7/31/20242,380,000 shares $102.89 million -0.4%2.3%3.4 $43.23 7/15/20242,390,000 shares $98.44 million +5.3%2.3%3.6 $41.19 6/30/20242,270,000 shares $89.87 million -5.4%2.2%3.7 $39.59 6/15/20242,400,000 shares $85.90 million No Change2.3%4.2 $35.79 5/31/20242,400,000 shares $86.42 million -9.8%2.3%4.4 $36.01 5/15/20242,660,000 shares $97.65 million +0.4%2.6%4.9 $36.71 4/30/20242,650,000 shares $90.37 million +9.5%2.6%4.6 $34.10 4/15/20242,420,000 shares $76.23 million +3.4%2.3%4.3 $31.50 3/31/20242,340,000 shares $77.71 million -4.9%2.2%4.1 $33.21 3/15/20242,460,000 shares $78.30 million +2.9%2.4%4.3 $31.83 2/29/20242,390,000 shares $78.65 million -12.8%2.3%3.7 $32.91 2/15/20242,740,000 shares $87.24 million +19.7%2.6%4 $31.84 1/31/20242,290,000 shares $68.86 million +1.3%2.1%2.1 $30.07 1/15/20242,260,000 shares $68.23 million +4.2%2.5%2.1 $30.19 12/31/20232,170,000 shares $66.40 million -26.4%2.0%2 $30.60 12/15/20232,950,000 shares $87.67 million -3.6%2.8%2.9 $29.72 11/30/20233,060,000 shares $81.82 million -16.9%2.9%3.2 $26.74 11/15/20233,680,000 shares $95.86 million +50.8%3.4%4.1 $26.05I 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 10/31/20232,440,000 shares $49.70 million +49.7%2.3%5.3 $20.37 10/15/20231,630,000 shares $33.02 million -4.7%1.5%3.8 $20.26 9/30/20231,710,000 shares $38.58 million -3.4%1.6%4.1 $22.56 9/15/20231,770,000 shares $41.67 million +4.1%1.7%4 $23.54 8/31/20231,700,000 shares $41.28 million +1.2%1.6%3.2 $24.28 8/15/20231,680,000 shares $39.50 million +11.3%1.6%3 $23.51 7/31/20231,510,000 shares $35.02 million -16.1%1.4%2.4 $23.19 7/15/20231,800,000 shares $43.38 million -5.3%1.7%2.8 $24.10 6/30/20231,900,000 shares $44.02 million -30.4%1.8%3 $23.17 6/15/20232,730,000 shares $63.20 million +2.6%2.6%4 $23.15 5/31/20232,660,000 shares $60.67 million -1.9%2.5%3.5 $22.81 5/15/20232,710,000 shares $67.72 million +15.3%2.5%3.6 $24.99 4/30/20232,350,000 shares $59.53 million -1.3%2.2%3.3 $25.33 4/15/20232,380,000 shares $62.09 million -4.0%2.2%3.2 $26.09 3/31/20232,480,000 shares $66.91 million +11.2%2.3%3.1 $26.98 3/15/20232,230,000 shares $50.62 million -10.8%2.1%2.3 $22.70 2/28/20232,500,000 shares $64.63 million -7.4%2.3%2.8 $25.85 2/15/20232,700,000 shares $72.79 million +0.8%2.4%2.9 $26.96 1/31/20232,680,000 shares $74.85 million -9.2%2.4%2.5 $27.93 1/15/20232,950,000 shares $79.30 million -16.9%2.7%2.7 $26.88 12/30/20223,550,000 shares $81.65 million +14.5%3.2%3.3 $23.00 12/15/20223,100,000 shares $62.68 million +10.7%2.8%3.2 $20.22 11/30/20222,800,000 shares $58.52 million +2.6%2.5%3 $20.90 11/15/20222,730,000 shares $59.00 million -17.0%2.5%3 $21.61 10/31/20223,290,000 shares $80.05 million +5.8%3.0%4 $24.33 10/15/20223,110,000 shares $67.21 million +2.3%2.8%4.1 $21.61 9/30/20223,040,000 shares $63.54 million -13.1%2.7%4.1 $20.90 9/15/20223,500,000 shares $78.47 million +9.4%3.1%5 $22.42 8/31/20223,200,000 shares $75.84 million -7.5%2.9%4.7 $23.70 8/15/20223,460,000 shares $89.10 million +2.1%3.1%5.1 $25.75 7/31/20223,390,000 shares $96.72 million +5.0%3.0%4.9 $28.53 7/15/20223,230,000 shares $86.63 million +2.5%2.9%4.8 $26.82 6/30/20223,150,000 shares $81.55 million -12.3%2.8%4.3 $25.89 6/15/20223,590,000 shares $92.73 million +16.9%3.2%4.6 $25.83 5/31/20223,070,000 shares $81.78 million -0.7%2.7%4.3 $26.64 5/15/20223,090,000 shares $79.57 million +13.6%2.7%4.4 $25.75 4/30/20222,720,000 shares $75.13 million +18.8%2.4%4 $27.62 4/15/20222,290,000 shares $62.95 million -17.3%2.0%3.4 $27.49 3/31/20222,770,000 shares $87.23 million -11.2%2.5%4.3 $31.49 3/15/20223,120,000 shares $99.81 million +3.0%2.8%5.3 $31.99 2/28/20223,030,000 shares $101.57 million +6.3%2.7%4.6 $33.52 2/15/20222,850,000 shares $99.29 million +13.6%2.5%4.1 $34.84 1/31/20222,510,000 shares $86.27 million +13.1%2.2%3.3 $34.37 1/15/20222,220,000 shares $76.70 million -2.6%1.9%2.6 $34.55 12/31/20212,280,000 shares $79.12 million +10.1%2.0%2.7 $34.70 12/15/20212,070,000 shares $69.28 million +1.5%1.8%2.5 $33.47 11/30/20212,040,000 shares $59.45 million -3.3%1.8%2.5 $29.14 11/15/20212,110,000 shares $73.24 million -2.8%1.8%2.7 $34.71 10/29/20212,170,000 shares $66.58 million -11.8%1.9%2.8 $30.68 10/15/20212,460,000 shares $76.75 million -0.8%2.1%4 $31.20I 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 9/30/20212,480,000 shares $76.21 million -3.9%2.1%4 $30.73 9/15/20212,580,000 shares $83.72 million +4.5%2.2%4.4 $32.45 8/31/20212,470,000 shares $79.61 million +7.4%2.1%4.6 $32.23 8/13/20212,300,000 shares $73.51 million +8.5%2.0%4.5 $31.96 7/30/20212,120,000 shares $72.72 million -0.5%1.8%4.1 $34.30 7/15/20212,130,000 shares $76.15 million -5.8%1.8%4.1 $35.75 6/30/20212,260,000 shares $83.94 million -14.7%1.9%4.3 $37.14 6/15/20212,650,000 shares $103.43 million -9.3%2.3%4.8 $39.03 5/28/20212,920,000 shares $111.72 million +1.0%2.5%5.1 $38.26 5/14/20212,890,000 shares $114.16 million +2.1%N/A4.6 $39.50 4/30/20212,830,000 shares $111.64 million -4.1%N/A4.7 $39.45 4/15/20212,950,000 shares $119.03 million -5.8%N/A5 $40.35 3/31/20213,130,000 shares $118.91 million -8.8%N/A5.1 $37.99 3/15/20213,430,000 shares $139.57 million -12.1%N/A5.4 $40.69 2/26/20213,900,000 shares $146.72 million +2.1%N/A5.5 $37.62 2/12/20213,820,000 shares $157.42 million +4.7%N/A5 $41.21 1/29/20213,650,000 shares $141.51 million -0.8%N/A4.3 $38.77 1/15/20213,680,000 shares $140.65 million -3.9%N/A4.3 $38.22 12/31/20203,830,000 shares $147.42 million -13.4%N/A3.9 $38.49 12/15/20204,420,000 shares $173.73 million -17.1%N/A4.1 $39.31 11/30/20205,330,000 shares $176.64 million -6.0%N/A4.4 $33.14 11/15/20205,670,000 shares $180.19 million -10.6%N/A5 $31.78 10/30/20206,340,000 shares $186.46 million +8.8%N/A6.1 $29.41 10/15/20205,830,000 shares $179.68 million +13.4%N/A5.7 $30.82 9/30/20205,140,000 shares $134.31 million -12.1%N/A5.6 $26.13 9/15/20205,850,000 shares $156.72 million +11.2%N/A7 $26.79 8/31/20205,260,000 shares $154.54 million -0.6%N/A7.4 $29.38 8/14/20205,290,000 shares $162.35 million -4.9%N/A8.1 $30.69 7/31/20205,560,000 shares $148.95 million +1.8%N/A8 $26.79 ACIW Short Interest - Frequently Asked Questions What is ACI Worldwide's current short interest? Short interest is the volume of ACI Worldwide shares that have been sold short but have not yet been covered or closed out. As of June 30th, investors have sold 2,720,000 shares of ACIW short. 2.63% of ACI Worldwide's shares are currently sold short. Learn More on ACI Worldwide's current short interest. What is a good short interest ratio for ACI Worldwide? 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. ACIW shares currently have a short interest ratio of 4.0. Learn More on ACI Worldwide's short interest ratio. Which institutional investors are shorting ACI Worldwide? As of the most recent reporting period, the following institutional investors, funds, and major shareholders have reported short positions of ACI Worldwide: 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 ACI Worldwide? 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. 2.63% of ACI Worldwide's floating shares are currently sold short. Is ACI Worldwide's short interest increasing or decreasing? ACI Worldwide saw a increase in short interest in the month of June. As of June 30th, there was short interest totaling 2,720,000 shares, an increase of 10.6% from the previous total of 2,460,000 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. What is ACI Worldwide's float size? ACI Worldwide currently has issued a total of 104,900,000 shares. Some of ACI Worldwide's outstanding shares are available for trading, while others are subject to various restrictions. The public float, also referred to as floating shares or "the float", are shares that publicly owned, unrestricted and available to trade on the open market. ACI Worldwide currently has a public float of 103,330,000 shares. How does ACI Worldwide's short interest compare to its competitors? 2.63% of ACI Worldwide's shares are currently sold short. Here is how the short interest of companies compare to ACI Worldwide: FactSet Research Systems Inc. (3.53%), Manhattan Associates, Inc. (3.48%), Pegasystems Inc. (6.39%), Informatica Inc. (8.30%), SolarWinds Co. (3.62%), Blackbaud, Inc. (2.72%), ePlus inc. (2.36%), Sapiens International Corporation N.V. (2.46%), NetScout Systems, Inc. (2.24%), Verint Systems Inc. (17.25%), 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 ACI Worldwide stock? Short selling ACIW is an investing strategy that aims to generate trading profit from ACI Worldwide as its price is falling. ACIW shares are trading up $0.48 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 ACI Worldwide? A short squeeze for ACI Worldwide 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 ACIW, which in turn drives the price of the stock up even further. How often is ACI Worldwide'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 ACIW, twice per month. The most recent reporting period available is June, 30 2025. More Short Interest Resources from MarketBeat Related Companies FactSet Research Systems Short Squeeze Manhattan Associates Short Squeeze Pegasystems Short Squeeze Informatica Short Squeeze SolarWinds Short Squeeze Blackbaud Short Squeeze ePlus Short Squeeze Sapiens International Short Squeeze NetScout Systems Short Squeeze Verint Systems 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:ACIW) was last updated on 7/16/2025 by MarketBeat.com Staff From Our PartnersINVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting OffRight now, we’re witnessing a monumental shift in the world.Traders Agency | SponsoredThe Trump Dump is starting; Get out of stocks now?The first 365 days of the Trump presidency… Will be the best time to get rich in American history.Paradigm Press | SponsoredSpecial gold investment soars 2,300% ... 5,090% ... 9,850%In my 54 years as an investor, I’ve seen my share of gold bull markets. 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Tim’s XGPT system...Timothy Sykes | Sponsored Adding Choose a watchlist: Watchlist Adding You have already added ten stocks to your watchlist. Upgrade to MarketBeat All Access to add more stocks to your watchlist. Adding ACI Worldwide, Inc. Please log in to your account or sign up in order to add this asset to your watchlist. Share ACI Worldwide With A Colleague Link copied to clipboard. Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. Start Your 30-Day Trial MarketBeat All Access Features Best-in-Class Portfolio Monitoring Get personalized stock ideas. Compare portfolio to indices. Check stock news, ratings, SEC filings, and more. Stock Ideas and Recommendations See daily stock ideas from top analysts. Receive short-term trading ideas from MarketBeat. Identify trending stocks on social media. Advanced Stock Screeners and Research Tools Use our seven stock screeners to find suitable stocks. 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