LinkedIn's Reid Hoffman and Jeff Weiner

Co-founder Reid Hoffman was interested in helping people transform their lives through economic opportunity. And LinkedIn does just that by helping its members build a network, tackle issues, cross-validate ideas and increase productivity. By creating new paths, it opens up possible economic opportunities for every professional.

Founded in 2003, LinkedIn started with 4,500 members in its first month. Now, more than 150 million members in more than 200 countries are connected through the world's largest professional networking.