ACI Worldwide, Inc. (ACIW)
How ACIW actually reacts to news — the realized, point-in-time move the market made, measured across 336 labeled events over the last three years with zero look-ahead.
ACIW’s median reaction, across the day.
Half of all ACI Worldwide, Inc. news events land between -0.63% and +0.69% at 30 minutes.
Reaction stats as of 2026-08-18. Reaction = percent move vs. the price at the news timestamp.
Email me when ACIW moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to ACIW’s baseline. Nothing else.
Get “How ACIW reacts to news” as a PDF.
A free one-page summary: ACIW’s median reaction to news and the full breakdown by event type — the numbers on this page, in one page.
Recent ACIW events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| ACI Worldwide Reports Strong Second Quarter 2026 Results and Raises Full-Year Guidance | Press release | Business Wire | +1.31% | +4.39% | |
| Form 10-Q ACI WORLDWIDE, INC. For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.50% | +1.65% | |
| Form 8-K ACI WORLDWIDE, INC. For: Aug 06 | SEC filing · Form 8-K | SEC EDGAR | +1.31% | +4.39% | |
| ACI Worldwide to Participate in Upcoming Investor Conferences | Press release | Business Wire | -0.27% | -1.53% | |
| ACI Worldwide and dLocal Bring Latin America's Leading Local Payment Methods to Global Merchants | Press release | Business Wire | +0.97% | +2.29% | |
| ACI Worldwide to Report Second Quarter 2026 Financial Results | Press release | Business Wire | +1.79% | +1.76% | |
| Six in Ten UK Consumers Would Stop Using an AI Shopping Agent After One Mistake, ACI Survey Finds | Press release | Business Wire | -0.32% | +0.26% | |
| FIFA World Cup: Fraud Attempts Surged More Than Threefold at Past World Cups, ACI Worldwide Finds | Press release | Business Wire | -1.54% | -1.17% | |
| ACI Worldwide Powers Rabobank’s Wero Instant Payments, Advancing Europe’s Real-Time Payments Transformation | Press release | Business Wire | -0.98% | +1.18% | |
| ACI Worldwide and EPI to Power Instant Payments in Europe | Press release | Business Wire | -0.12% | -0.82% | |
| ACI Worldwide Powers Next-Generation PSP Expansion in Africa with Kwik Payments Go-Live | Press release | Business Wire | -1.15% | +2.28% | |
| Europe’s Payments Leaders Gather in London as Control, Fraud and AI Reshape the Industry | Press release | Business Wire | -0.25% | +3.95% | |
| Form 8-K ACI WORLDWIDE, INC. For: Jun 02 | SEC filing · Form 8-K | SEC EDGAR | -2.11% | -4.70% | |
| UBX Tanzania Deepens Partnership with ACI Worldwide to Power the Next Phase of the Nation’s Digital Economy | Press release | Business Wire | -2.20% | -0.68% | |
| ACI Worldwide and Security Bank Philippines Set New Benchmark for Enterprise-wide Payments Modernization | Press release | Business Wire | +0.16% | +0.85% | |
| ACI Worldwide to Attend Upcoming Investor Conferences | Press release | Business Wire | -1.40% | -1.75% | |
| ACI Worldwide Reports Strong First Quarter 2026 Results and Raises Full-Year Guidance | Press release | Business Wire | -0.97% | -1.37% | |
| Form 10-Q ACI WORLDWIDE, INC. For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.37% | +1.59% | |
| Form 8-K ACI WORLDWIDE, INC. For: May 07 | SEC filing · Form 8-K | SEC EDGAR | -0.97% | -1.37% | |
| Peru, Chile and Argentina Enter a New Phase of Growth Driven by Real-Time Payments, ACI Worldwide Report Finds | Press release | Business Wire | +0.09% | -0.45% | |
| ACI Worldwide and Kinexys by J.P. Morgan Collaborate to Mitigate Global Real-Time Payments Fraud | Press release | Business Wire | -0.85% | +2.35% | |
| As Multi-Rail Complexity Grows, ACI Worldwide Delivers One Cloud-Native Platform for Eight U.S. Networks | Press release | Business Wire | -2.64% | -3.19% | |
| Form ARS ACI WORLDWIDE, INC. For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +1.43% | +2.38% | |
| Form DEF 14A ACI WORLDWIDE, INC. For: Jun 02 | SEC filing · Form DEF | SEC EDGAR | +1.43% | +2.38% | |
| Form DEFA14A ACI WORLDWIDE, INC. | SEC filing · Form DEFA14A | SEC EDGAR | +1.43% | +2.38% | |
| ACI Worldwide to Report First Quarter 2026 Financial Results | Press release | Business Wire | +0.30% | -0.02% | |
| Nearly One in Three Gen Z Adults Report Not Filing Taxes as Digital Divide Widens Across Generations, ACI Worldwide Survey Finds | Press release | Business Wire | +0.74% | +1.90% | |
| Colombia’s Bre-B Hits More than 500 Million Transactions as ACI Worldwide and Banco de la República Take the Stage at Fintech Americas 2026 | Press release | Business Wire | +0.84% | +1.53% | |
| Bill Pay Industry Nears Inflection Point as Only 26% of Organizations Trust Legacy Systems to Meet Future Needs, ACI Speedpay Study Finds | Press release | Business Wire | +1.27% | -1.29% | |
| ACI Worldwide Launches Card Payments on Cloud-Native ACI Connetic, Advancing Unified Payments Platform | Press release | Business Wire | -1.63% | +0.02% | |
| ACI Worldwide, Inc. Reports Double-Digit Revenue Growth for Full Year Ended December 31, 2025 | Press release | Business Wire | +0.32% | -1.07% | |
| Form 10-K ACI WORLDWIDE, INC. For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.28% | -0.07% | |
| Form 8-K ACI WORLDWIDE, INC. For: Feb 23 | SEC filing · Form 8-K | SEC EDGAR | +0.32% | -1.07% | |
| ACI Worldwide Executive Philip Bruno to Address the Rise of Agentic Commerce at MIT Sloan Fintech Conference | Press release | Business Wire | +0.20% | +0.82% | |
| ACI Connetic Accelerates Global Adoption as UK Banks Can Now Unite SWIFT, CHAPS and Faster Payments on One Cloud-Native Platform | Press release | Business Wire | +1.31% | +0.67% | |
| ACI Worldwide, Inc. To Release Financial Results for the Quarter and Year Ending December 31, 2025 | Press release | Business Wire | -0.33% | +4.36% | |
| ACI Worldwide Report: Global Refund Volumes Surge 18% as Retailers Tighten Returns | Press release | Business Wire | -1.00% | -7.60% | |
| Form 8-K ACI WORLDWIDE, INC. For: Jan 13 | SEC filing · Form 8-K | SEC EDGAR | +0.04% | +0.02% | |
| ACI Worldwide Adds Paze ? Online Checkout from Early Warning Services to Pay.On Platform, Expanding Wallet Options for U.S. Consumers | Press release | PR Newswire | -0.11% | +1.36% | |
| Payments Leaders Unprepared for 2026 Disruption, Warns ACI Worldwide | Press release | Business Wire | +0.09% | +1.22% | |
| BPI’s BanKo Teams Up with ACI Worldwide to Modernize Payments Infrastructure | Press release | Business Wire | +0.09% | +1.22% | |
| LLP Exotic Auto Finance Chooses ACI Worldwide to Modernize Bill Payment, Automate 90% of Manual Processes | Press release | Business Wire | +0.51% | +0.09% | |
| Payments Modernisation: Gap Between Confidence and Readiness Among Industry Leaders Widens, ACI Worldwide Study Finds | Press release | Business Wire | +0.45% | -0.19% | |
| Friendly Fraud Expected to Increase by 25% Between Thanksgiving and Cyber Monday, Warns ACI Worldwide | Press release | Business Wire | +0.47% | +0.30% | |
| ACI Worldwide to Discuss Payments Modernization and Fraud Trends at Three Investor Conferences | Press release | Business Wire | -0.19% | -1.03% | |
| ACI Worldwide, Inc. Reports Financial Results for the Quarter Ended September 30, 2025 | Press release | Business Wire | +3.11% | +2.91% | |
| Form 10-Q ACI WORLDWIDE, INC. For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.21% | -2.67% | |
| Form 8-K ACI WORLDWIDE, INC. For: Nov 06 | SEC filing · Form 8-K | SEC EDGAR | +3.11% | +2.91% | |
| ACI Worldwide Acquires European Fintech Payment Components to Augment ACI Connetic | Press release | Business Wire | -0.46% | +0.08% | |
| Stablecoins Unlock New Pathways of Economic Growth and Trade, says David Malpass at ACI’s Payments Unleashed Summit | Press release | Business Wire | -0.59% | +1.07% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the ACIW section they belong to.
More of the dataset.
ACIW earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is ACI Worldwide, Inc.'s median reaction calculated?
Every labeled ACIW news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 336 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 53% of ACIW's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-08-18.
Does ACIW's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.