Facebook founder Mark Zuckerberg is now the 6th richest man in the world, moving up 10 spots from last years Forbes' 2016 billionaires list of the world's richest people. According to Forbes, Mark made more than $11billion in one year, going from $33.4 billion in the 2015 ranking to $44.6 billion in the 2016 ranking. Bill Gates is still the richest man in the world.