ACI Worldwide, Inc. (ACIW) Stock Price & How to Invest

ACI Worldwide, Inc. builds the software that moves and manages payments behind the scenes. Founded in 1975 and headquartered in Florida, the company sells payment hubs and real-time payment engines to banks and processors, authorization and orchestration software to large merchants, machine-learning fraud detection across both, and, through its Biller segment, electronic billing and digital collections for utilities, insurers, telecoms, healthcare providers and government agencies. After a 2025 reorganization the business reports in two segments: Payment Software (the former banking and merchant units combined) and Biller. Its customers are institutional and sticky, deployments run for years, and a meaningful share of revenue comes from outside the United States.

The investment picture rests on three things. First, revenue mix: FY2025 revenue was roughly $1.76 billion, up about 10%, with SaaS and platform services now the largest line at roughly $1.0 billion versus roughly $460 million of license and roughly $200 million of maintenance, and Q1 2026 recurring revenue grew about 10% to roughly $313 million. Second, margins: adjusted EBITDA margin has been expanding as the mix shifts toward subscription. Third, structure: in July 2026 the company was reported to be working with bankers on a possible sale of the Biller segment at roughly $1.5 billion, or about 10 to 12 times that unit's 2025 adjusted EBITDA of roughly $141 million. That would leave a smaller, higher-margin payments software company with a large cash balance, which is why the stock now trades partly on deal speculation as well as on operating results.

The single most persistent issue is revenue lumpiness: term license renewals concentrate in particular quarters, so reported growth and GAAP earnings can swing sharply on the timing of a handful of large bank contracts, and trailing-twelve-month net income of roughly $206 million was down about 24% even as revenue grew. Competition comes from far larger diversified rivals such as FIS and Fiserv, from banking-software specialists such as Finastra, and from cloud-native challengers and in-house bank builds that can undercut a legacy vendor on deployment speed. The Biller process is speculative: it may not close, may fetch less than the reported $1.5 billion, and would leave a materially smaller company if it does. The balance sheet carries roughly $840 million of debt against roughly $196 million of cash, which limits flexibility if license renewals slip. The company also has a regulatory history, including a Consumer Financial Protection Bureau action and state settlements tied to a 2021 incident in which test ACH files caused unauthorized mortgage payment processing, and a large share of revenue is international, adding currency and sovereign-budget exposure.

3 analysts publish price targets on ACIW, averaging $66.67 against a $57.79 price as of August 2026, or +15.4%. The published targets run from $64.00 to $70.00, a narrow spread, and the ratings split 3 buy, 1 hold, 0 sell. Over the last six months there has been 1 raise and 0 cuts among the published actions. A price target is what an analyst published on a date, not a prediction, and sell-side ratings skew positive across the whole market.

Read the full ACIW forecast and price target for the target table, the recent rating actions by firm, and how the consensus has shifted.

We give no verdict on ACI Worldwide, Inc.. Both cases are real, which is why the question is contested at all, so here is the strongest version of each.

The case for buying. Real-time payments modernization. Instant payment schemes have moved from optional to mandated in several major markets, including Europe's Instant Payments Regulation and the continued build-out of FedNow in the United States, alongside established rails such as Pix, UPI and FPS. The most optimistic published target, $70.00, assumes this works close to its best case.

The case against. The single most persistent issue is revenue lumpiness: term license renewals concentrate in particular quarters, so reported growth and GAAP earnings can swing sharply on the timing of a handful of large bank contracts, and trailing-twelve-month net income of roughly $206 million was down about 24% even as revenue grew. The most pessimistic target, $64.00, is roughly what ACIW is worth if this bites instead.

Read the full bull and bear case on ACIW, including what would have to change to break either one. Walnut is not an investment adviser.

A simple financial snapshot. These are approximations and refresh quarterly; for current figures see ACI Worldwide, Inc.'s investor relations page or your broker.

• Market cap: ~$5.9B
• Revenue (TTM): ~$1.79B
• Net income (TTM): ~$206M
• EPS (TTM): ~$1.98
• P/E (trailing / forward): ~29x / ~17x
• FY2026 revenue guidance: ~$1.89B to $1.92B

The wide gap between the trailing multiple of roughly 29 times and the forward multiple of roughly 17 times reflects both the expected 2026 earnings recovery and the license-timing distortion in trailing GAAP results, so the trailing figure on its own overstates how expensive the shares look. Free cash flow was roughly $310 million in FY2025 against net debt of roughly $644 million, which is a comfortable coverage ratio for a software business. Second-quarter 2026 results were scheduled for August 6, 2026, with company guidance of roughly $420 million to $440 million of revenue and roughly $85 million to $95 million of adjusted EBITDA.

Other names that sit close to ACIW: same theme, named as a direct competitor, or held beside it in the same funds. Each entry says which. Worth a look if you are thinking about diversification within a thesis rather than concentration on one ticker.

There are three common ways to get ACIW exposure. Buy shares (or fractional shares) directly at any major broker. Hold an ETF that includes it, which spreads the position across many companies. Or build it into a focused thematic portfolio, so ACIW sits alongside other stocks that express the same thesis.

Walnut takes the portfolio route. Describe a thesis where ACIW fits (for example “AI infrastructure” or “dividend-growth large-caps”) and the AI proposes 5 to 6 constituents with target weights. You review the plan and fund it through your own broker when you're ready.

New to this? Start with how to invest in stocks, see how to analyze a stock with AI, or compare the best AI stock analyzers.

ACIW is an infrastructure software business levered to real-time payments upgrades, where the analytical work is separating durable recurring revenue from quarter-to-quarter license lumpiness and handicapping the Biller divestiture.

Whether ACIW is worth buying today depends more on your time horizon and what you already hold than on any single call. We walk through valuation, what would have to go right, and the risks in is ACIW a buy or a sell?, and where the stock could go from here in the ACIW stock forecast.

For income investors, whether ACIW pays a dividend and how the payout looks is covered in does ACIW pay a dividend? And to weigh ACIW against a peer, read the full side-by-side comparisons: ACIW vs FIS and ACIW vs FISV.