Bill Gates is the richest man in the world, with a net worth valued at $76 billion. Though the Microsoft founder donated the greatest amount, $1.92 billion dollars last year, this was just 2.5 percent of his worth. The donation went to the and will be spent alleviating poverty and providing healthcare to people in developing countries.

Mark Lennihan/AP
Bill Gates, philanthropist and co-founder of Microsoft, participates in a session titled "Investing in Prevention and Resilient Health Systems," Sunday, Sept. 27, 2015 at the Clinton Global Initiative in New York.