Transformational engagements are a critical pillar of the 2013 World Bank Group’s strategy for achieving its twin goals of extreme poverty elimination and shared prosperity. In Supporting Transformational Change for Poverty Reduction and Shared Prosperity, the Independent Evaluation Group reviews evaluative evidence for a purposeful and diverse group of Bank Group interventions to understand the mechanisms and conditions for transformational change. Its analysis distills lessons and implications for the World Bank Group as it increases its reliance on transformational engagements to enhance the impact of its interventions. This issue of IEG Insights presents a summary.