"This report is arranged into two sections. In Part One, the editors overview trends in impact investing among INGOs, drawing on data from a recent survey of 45 INGOs engaged in impact investing. Part Two, a series of chapters, authored by leaders in impact investing, delves into key topics of interest for INGOs. These chapters look more deeply at specific assets INGOs bring to the space, challenges they face, and lessons they have learned over the past few years of engagement. Throughout the report, case studies of what INGOs are doing in impact investing brings the data and lessons to life through real life examples."