Warren Buffett – $65.1 billion
The Berkshire Hathaway boss man hasn’t been shy about his distaste for leaving an inheritance to his family members. “I’m not an enthusiast for dynastic wealth, particularly when 6 billion others have much poorer hands than we do in life,” he reportedly said at a 2006 event following his announcement to donate the vast majority of his fortune. Since then, Buffett has pledged to give away a full 99% of his money to charity and has encouraged other billionaires to give away at least 50% of their wealth through The Giving Pledge.

Warren Buffett – $65.1 billion
Michael Bloomberg – $34 billion
Michael Bloomberg is the former mayor of New York City. He made a fortune as the owner of a financial information company bearing his name. He has two daughters but signed the Giving Pledge by Buffett and Gates anyway. In the letter, he wrote, “If you want to do something for your children and show how much you love them, the single best thing—by far—is to support organizations that will create a better world for them and their children.” His very own Bloomberg Philanthropic Foundation focuses on different causes such as literacy and health care.

Michael Bloomberg – $34 billion