Public Investment Fund (PIF) | 1,424,632 followers on LinkedIn. The Public Investment Fund is Saudi Arabia's sovereign wealth fund. | About Public Investment Fund (PIF) is building a world-class domestic and international investment portfolio, and is positioned to be transformed into the world’s largest sovereign wealth fund. Background The Public Investment Fund was originally established in 1971 to invest in commercial projects. In addition to making select investments in a range of companies and assets domestically and internationally.