This report is structured in three chapters. The first chapter examines the channels through which institutional investors can access green infrastructure, assesses the extent to which this is currently happening, and identifies the barriers to scaling up these investment flows. The second chapter presents four case studies: on utility-scale solar PV power generation in the United States, sustainable agriculture in Brazil, off-shore wind energy in the United Kingdom, and the securitisation of on-shore wind farms in Germany and France. The third chapter uses the conclusions on the case studies to draw out broader lessons for governments on the policy settings which may support investment in green infrastructure by institutional investors. These include, inter alia, ensuring a stable and integrated policy environment, addressing market failures, providing an infrastructure road map, facilitating the development of appropriate green financing vehicles, and promoting market transparency and improved data collection. Direct link: https://www.oecd-ilibrary.org/finance-and-investment/institutional-investors-and-green-infrastructure-investments_5k3xr8k6jb0n-en