Bill and Melinda Gates Foundation - controlled by another billionaire and their heirs
Susan Thompson Buffet Foundation - controlled by Buffet
Sherwood Foundation - controlled by Warren Buffet's daughter
Howard G. Buffet Foundation - controlled by another Buffet family member
NoVo Foundation - controlled by Warren Buffet's son
Billionaire philanthropy is a disgusting scam. It's a way of buying social influence for your heirs. Even if they don't get the money directly, the heirs retain control over the foundation and can direct it to whatever causes, often political causes, that they personally support. It's a way of giving your heirs money that they can use to obtain more power - which is ultimately the only use billionaires have for their fortunes anyway. The only use for billions of dollars is to obtain power, and these foundations are a way of passing power and influence to the next generation tax free. It's an abomination. You should not be able to donate money to foundations that you control.