Citi Infrastructure Investors is an investment firm specializing in infrastructure investments. It seeks to invest in infrastructure, transportation and utilities. The firm primarily invests in OECD countries. It is based in London, United Kingdom. Citi Infrastructure Investors operates as a subsidiary of Citigroup Alternative Investments LLC. Citigroup has sold its $3.4 billion Citi Infrastructure Fund to US-based Corsair Infrastructure Management, a subsidiary of Corsair Capital.