Sustainable infrastructure investing is one of the important factors while achieving sustainable 
development goals. While traditional sources of finance are insufficient, innovative investing 
for sustainable infrastructure has emerged to be a viable option. To understand the changing 
landscape of sustainable infrastructure financing, this study synthesised the academic 
literature on sustainable investing and financing using bibliometric analysis followed by 
content analysis. High quality articles from the year 2011 to mid-2025 were retrieved from the 
Scopus database using PRISMA framework and content analysis was performed on selected 25 
articles. The intellectual and conceptual structures in the bibliometric analysis highlighted the 
research themes and progression in the field so far. Through bibliometrics, a quantitative 
review of extant literature was done along with in-depth content analysis which provides novel 
insights. Three themes emerged out of the content analysis: sustainable development, finance 
& investment and PPPs & green infrastructure which forms the basis of future research. The 
study also summarises the research using the theories-context-characteristics methods 
(TCCM) framework. The findings will help future researchers to focus on further theory 
development in the areas of sustainable investing and financing. The study also offers practical 
implications for investors, issuers, and regulators involved in sustainable investing.