David Karp – Founder and CEO, Tumblr

Karp has done home-schooling and never attended college. He founded Tumblr, a blogging platform in 2007. In 2010, he was named as one of the top 35 innovators in the world under the age of 35. He has an estimated net worth of $ 40 million.

Sean Quinn – Founder, Quinn Group

The son of a small farmer, Quinn left school at 14 years of age, took a loan 100 pounds and started doing business. In 2008 he was the richest person in Ireland. He has created a fortune of $ 9 billion. But in 2011 he was filed for bankruptcy.

Dave Thomas – Founder and CEO, Wendy’s

Thomas was an American fast-food tycoon known for his food chain Wendy’s, which he founded in 1969. Born to single mother whom he never knew, he never attended school and got lessons of life from his grand mother. He had worked in the US Army and also in KFC. He is also known for appearing in more than 800 ads for the Wendy’s, more than any other company founder in television history.