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. As of mid-October 2026 no Biller transaction had been announced.

The most recent quarter, Q2 2026, brought revenue of ~$430 million, up ~7.3% year over year and inside the company's $420 million to $440 million guide, with adjusted EPS of ~$0.54 against a ~$0.53 consensus. Since then ACI has added Swift blockchain-ledger routing to its Connetic payments hub (September 22), signed up Solaris for SEPA Instant Payments and the Federal Home Loan Bank of Cincinnati for member payments on Connetic, and published AWS performance tests of its BASE24-eps card software with Cognizant. The stock closed at ~$51.99 on October 16, 2026, up ~13.8% year to date and ~7.9% over one year but ~8% lower over three months, within a 52-week range of ~$38.05 to ~$61.08.

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 quarterly GAAP net income ranged from ~$32 million to ~$91 million over the past four quarters even as trailing revenue reached ~$1.82 billion. Consensus for the November 5, 2026 third-quarter report calls for EPS of ~$0.61, down ~44% from a year earlier, on ~$422 million of revenue. 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 $864 million of debt against roughly $167 million of cash (June 30, 2026), 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.

4 analysts publish price targets on ACIW, averaging $64.50 against a $58.40 price as of November 2026, or +10.4%. The published targets run from $56.00 to $70.00, a narrow spread, and the ratings split 3 buy, 2 hold, 0 sell. Over the last six months there have been 2 raises 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 quarterly GAAP net income ranged from ~$32 million to ~$91 million over the past four quarters even as trailing revenue reached ~$1.82 billion. The most pessimistic target, $56.00, 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.

No. ACI Worldwide, Inc. (ACIW) has not split its stock in the last 10 years. That is a statement about the window we check rather than about the company’s entire history, so an older split is possible. It also matters less than it once did: fractional shares mean a high price per share no longer keeps smaller investors out, which removed most of the practical reason to split.

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: ~$5.3B
• Revenue (TTM): ~$1.82B (Q2 2026 up ~7.3% yoy)
• Net income (TTM): ~$226M (~12% margin)
• EPS (TTM): ~$2.19
• P/E (trailing / forward): ~24x / ~13x
• Free cash flow (TTM): ~$261M
• FY2026 revenue consensus: ~$1.91B

At ~$51.99 on October 16, 2026, ACIW trades at roughly 24 times trailing GAAP earnings but only about 13 times forward estimates, because consensus expects 2026 EPS of ~$3.60 and 2027 EPS of ~$3.90 as license renewals land, heavily in the fourth quarter. Trailing free cash flow of ~$261 million against net debt of roughly $700 million is comfortable coverage for a software business. Third-quarter results are due November 5, 2026, with consensus at ~$0.61 EPS on ~$422 million of revenue.

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. At ~$52 in October 2026 the shares trade near 13x forward earnings, with the November 5 report the next read on license timing.

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.