Mark Elliot Zuckerberg (born May 14, 1984) is an American programmer, Internet entrepreneur, executive, and philanthropist. He is the chairman, chief executive officer, and co-founder of social networking website Facebook. His net worth is estimated to be US $55.3 billion as of October 2016, ranking him as the 5th richest person in the world. Since 2010, Time magazine has named Zuckerberg among the 100 wealthiest and most influential people in the world as a part of its Person of the Year distinction.