5. Mark Zuckerberg:
He is an American richest internet entrepreneur, programmer and philanthropist. He is the chairman, CEO and co-founder of the social networking website Facebook. Facebook is the most popular social networking site with the highest number of users all over the world. He has pledged to give 99% of his Facebook shares to the Chan Zuckerberg Initiative. He has been named among the 100 most influential people in the World by Time, since 2010. His net worth is estimated to be about US$74 billion.