ACI Worldwide (ACIW) Short Interest Ratio & Short Volume $40.74 -1.82 (-4.28%) Closing price 08/1/2025 04:00 PM EasternExtended Trading$41.45 +0.71 (+1.74%) As of 08/1/2025 05:40 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 2.66 million shares, representing 2.57% of the float (the number of shares available for trading by the public). This marks a -2.21% decrease in short interest from the previous month. The short interest ratio (days to cover) is 3.6, indicating that it would take 3.6 days of the average trading volume of 700,744 shares to cover all short positions.Current Short Interest2,660,000 sharesPrevious Short Interest2,720,000 sharesChange Vs. Previous Month-2.21%Dollar Volume Sold Short$116.45 millionShort Interest Ratio3.6 Days to CoverLast Record DateJuly 15, 2025Outstanding Shares104,900,000 sharesFloat Size103,320,000 sharesShort Percent of Float2.57%Today's Trading Volume1,156,636 sharesAverage Trading Volume700,744 sharesToday's Volume Vs. Average165% 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 7/15/20252,660,000 shares $116.45 million -2.2%2.6%3.6 $43.78 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 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. 2/15/20252,320,000 shares $121.82 million +19.0%2.2%3.5 $52.51 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 $26.74This New Rule Could Change Everything (Ad)A major change is quietly going into effect this July — and Wall Street is already positioning for it. Big Banks have found a way to use a new asset as if it were cash. Not stocks. Not bonds. Not even the U.S. dollar. They now trust this asset more than the traditional financial system itself.To help you get started, we're giving away a FREE Wealth Protection Guide that shows you exactly how 11/15/20233,680,000 shares $95.86 million +50.8%3.4%4.1 $26.05 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 $30.68This New Rule Could Change Everything (Ad)A major change is quietly going into effect this July — and Wall Street is already positioning for it. Big Banks have found a way to use a new asset as if it were cash. Not stocks. Not bonds. Not even the U.S. dollar. They now trust this asset more than the traditional financial system itself.To help you get started, we're giving away a FREE Wealth Protection Guide that shows you exactly how 10/15/20212,460,000 shares $76.75 million -0.8%2.1%4 $31.20 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 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 closed out or covered. As of July 15th, investors have sold 2,660,000 shares of ACIW short. 2.57% 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. 2.57% of ACI Worldwide's floating shares are currently sold short. Is ACI Worldwide's short interest increasing or decreasing? ACI Worldwide saw a drop in short interest in the month of July. As of July 15th, there was short interest totaling 2,660,000 shares, a drop of 2.2% from the previous total of 2,720,000 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 103,320,000 shares. How does ACI Worldwide's short interest compare to its competitors? 2.57% 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. (4.16%), Manhattan Associates, Inc. (3.13%), Pegasystems Inc. (3.04%), Informatica Inc. (9.66%), Blackbaud, Inc. (2.48%), ePlus inc. (2.02%), Sapiens International Corporation N.V. (2.94%), NetScout Systems, Inc. (3.32%), Verint Systems Inc. (9.66%), PROS Holdings, Inc. (10.42%), 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 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 down $1.82 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 July, 15 2025. More Short Interest Resources from MarketBeat Related Companies FactSet Research Systems Short Squeeze Manhattan Associates Short Squeeze Pegasystems Short Squeeze Informatica Short Squeeze Blackbaud Short Squeeze ePlus Short Squeeze Sapiens International Short Squeeze NetScout Systems Short Squeeze Verint Systems Short Squeeze PROS 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 8/2/2025 by MarketBeat.com Staff From Our PartnersIs Elon's empire crumbling?The Tesla Shock Nobody Sees Coming While headlines scream "Tesla is doomed"... Jeff Brown has uncovered ...Brownstone Research | SponsoredBuffett to put 90% of his money in this one stock?CPA and CFA says you have WAY too many stocks - just buy these 3 After years working at the biggest accoun...Altimetry | SponsoredHe Called Nvidia at $1.10. 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