ACI Worldwide Inc (ACIW) - Stock Report

The latest reported quarter is fiscal Q1 2026, released on 7 May 2026. Revenue was $425.7 million, up 8% year over year, GAAP net income was $38.3 million, GAAP diluted EPS was $0.37 versus $0.55 in Q1 2025, and adjusted diluted EPS was $0.61 versus $0.51, up 20%. GAAP diluted EPS declined because Q1 2025 included the Mindgate gain; adjusted EBITDA was $105.2 million. The quality read is mixed but improving: recurring revenue was $312.9 million, new ARR bookings were $12.4 million, Q2 guidance is $420-440 million of revenue and $85-95 million of adjusted EBITDA, and management raised FY2026 guidance to revenue of $1.89-1.92 billion and adjusted EBITDA of $540-555 million. The caution is a single-quarter cash signal: Q1 single-quarter operating cash flow was $64.2 million versus $105.2 million of adjusted EBITDA and fell from $78.2 million because contract signings were weighted late in the quarter.

The key macro issue is not payment modernization in isolation, but whether bank, merchant and biller demand passes through Biller interchange, receivables and reinvestment into retained free cash flow per share; if that bridge holds, ACI can compound below fair value, while if collections, net margins or financing costs absorb the growth, adjusted EBITDA will overstate what common shareholders keep.

ACI Worldwide sells and operates payment software used by banks, merchants, intermediaries, and billers to authorize, route, settle, protect, and present electronic payments. The company is valuable because many customers run ACI inside transaction workflows where outages are operationally expensive and replacements require long testing, compliance, and integration cycles.

The current reporting structure has two segments. Payment Software serves banks and merchants, including issuing and acquiring, real-time payments, merchant payments, and payments intelligence. Biller provides electronic bill presentment and payment services, where ACI collects large gross payment volumes but reports a major pass-through interchange cost before the economics become net revenue and adjusted EBITDA.

Management is prioritizing cloud-native payments orchestration, real-time payments, merchant growth, and Biller execution while continuing buybacks. In Q1 2026, Real Time Payments and Merchant each grew more than 20% on a constant-currency basis, Biller grew 10%, and the company repurchased 1.5 million shares for about $65 million. That capital return is sensible only if organic post-capex cash and adjusted-to-reported earnings conversion remain durable.