This document summarizes the key findings from a study of over 3,000 Chief Information Officers worldwide. The study identified four distinct "CIO Mandates" that CIOs take on based on their organization's view of IT's role: Leverage, Expand, Transform, and Pioneer. CIOs must understand their unique mandate and ensure IT supports the organization's business objectives. While the mandates may change over time, CIOs are well-positioned to help organizations cope with complexity and generate insights from data.