Mark Zuckerberg is an American technology entrepreneur and philanthropist 

who has a net worth of $55 billion

Mark Zuckerberg has spent much of the last decade as one of the richest people on the planet

Out of the top 100 richest people in the world Mark is the youngest

The vast majority of Mark's fortune is attributable to his shares in Facebook

Mark currently owns around 400 million total shares of Facebook

Mark Zuckerberg's net worth topped $100 billion for the first time on August 7, 2020