On today's call, we will discuss ACI Worldwide's Q1 2026 results, as well as our updated financial outlook for the remainder of the year. You can find the full text of these statements in our earnings press release and in our filings with the SEC. Bobby will then review our financial results in more detail, including segment performance, cash flow, and updated outlook for 2026. As always, I appreciate you joining us for our Q1 2026 earnings call.
We're in a strong competitive position, we're increasingly optimistic about the outlook for our business. If I look at the Q1, we delivered 6% organic revenue growth in constant currency, that growth compares against the strongest Q1 in the company's history last year. That is the strongest quarter until this quarter since we grew on top of that. Our focus on operational efficiency, combined with the operating leverage in our model, drove over 160 basis points of FX adjusted, net adjusted EBITDA margin expansion and 8% adjusted EBITDA growth.
The combination of this overall strong operating performance and our continued share repurchases, I'll detail that a little bit later, translated to double-digit growth in adjusted EPS. As we regularly discuss, our strategy emphasizes growth within our core vertical markets, disciplined operational execution, and a return-driven approach to capital allocation. Our growth strategy is built on expanding within our existing customer base in addition to winning new logos and of course, accelerating innovation all along the way. Within our Payment Software segment, we took a major step forward in 2025 when we unified our bank and merchant businesses into what we now call Payment Software.
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