Zuckerberg is co-founder and chief executive officer of Facebook, the world's largest social-media site. Started in 2004, the site has more than 900 million monthly users and generated more than $3.7 billion in revenue in 2011. The company sold shares in an initial public offering May 17, 2012—the biggest technology IPO in history.
Bloomberg Markets’ inaugural list of the world’s richest people showcases the billionaires who pull the levers on the global economy. Their net worth totals $2.7 trillion, about the size of the gross domestic product of France, the fifth-biggest economy on the planet.