Guillaume Paumier / Wikimedia Commons

Mark Zuckerberg

A photo of Mark Zuckerberg, creator and CEO of Facebook, at a press conference in 2011 during the G-8 summit in Deauville, France. 

Facebook went public the next year, making Zuckerberg officially a multi-billionaire.

(Mark Zuckerberg photo by Guillaume Paumier via Wikimedia Commons, published under a Creative Commons 3.0 license.  Thanks, Mr. Paumier!)

See our biography of Mark Zuckerberg