This document, "The ROI of AI 2025," explores how AI agents are driving significant business value and return on investment (ROI) across various industries. It highlights a shift from predictive to generative AI, culminating in the current "agentic era," where AI agents independently execute tasks under human guidance. The report, based on a survey of 3,466 global business leaders, identifies productivity, customer experience, business growth, marketing, and security as key areas where AI delivers tangible benefits. Furthermore, it emphasizes the critical role of C-suite sponsorship and a clear AI strategy in achieving successful implementation and maximizing returns, while also addressing challenges like data privacy and integration. Early adopters of AI agents are shown to have a distinct advantage in realizing ROI and deploying agents at scale.