Building green is not only imperative to achieve global climate and development commitments in this "decade for delivery", but will also be critical to sustain socio-economic development during the COVID-19 recovery. Private investment in particular is needed to bridge the infrastructure investment gap, given institutional investors' large pools of long-term capital. After several years of efforts to upscale institutional investment in infrastructure, where does the level of investment stand today? This report provides a first-of-its-kind empirical assessment of investment in infrastructure by institutional investors domiciled in OECD and G20 countries, presenting a snapshot from February 2020. Based on a new detailed view of investment channels, financial instruments, sectoral allocations, regional preferences and trends, the report provides guidance on policy levers and priorities to scale-up institutional investment in green infrastructure.