Developing country investors haveemerged as a major source of investment finance forinfrastructure projects with private participation.Thepotential role of this investor class is encouraging. Forpolicymakers it suggests a need to rethink privatizationdesign, particularly the criteria used in selectinginvestors, which have been biased toward large internationalfirms.The growth in new private infrastructure firms alsomatters because it should reduce the risk of collusion andother anticompetitive practices.This paper discusses therole of developing country investors, and their investmentacross regions.