ACI Worldwide, Inc. (ACIW:NASDAQ) closed at $55.88 on October 23, 2026, down 0.55% on the day. The stock trades 8.5% below its 52-week high of $61.08 and 46.9% above its 52-week low of $38.05. Over the past year, it gained 10.9%. ACI Worldwide, Inc. is part of the Technology sector (Computer Software: Prepackaged Software).
In 252 trading sessions since October 23, 2025, ACIW closed higher on 133 days (53%). Its best day was May 7, 2026 (+7.81%) and its worst was February 3, 2026 (-9.04%). It never moved 10% or more in a single session. It opened at least 5% above the previous day's high 1 time.
ACI Worldwide, Inc., together with its subsidiaries, develops, markets, installs, and supports software products and services for facilitating electronic payments to financial institutions and intermediaries, merchants, and billers worldwide. The company offers UP Retail Payments solution, which integrates UP BASE24-eps and UP Framework products enabling financial institutions to accept switch payment transactions; and UP Immediate Payments solution that integrates UP BASE24-eps and UP Framework products configured to connect to country-level real-time payment schemes and create differentiated products. It also provides UP Transaction Banking solutions, including Universal Online Banker, an online payments portal; Money Transfer System, a global payments engine. In addition, the company provides Postilion, a payments platform; PAY.ON Payments Gateway; and ReD Shield, a real-time fraud prevention solution. Further, it provides UP Payments Risk Management, a fraud prevention and detection solution; UP Bill Payment solutions, which enable direct billers to present bills and collect payments from consumers electronically through a single and integrated platform, which controls the enti...
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