In 2009 Bill Gates and Warren Buffet founded "The Giving Pledge", where they and other billionaires pledge to give at least half of their wealth to philanthropy. Bill and his wife Melinda have a foundation called the Bill and Melinda Gates Foundation. In 2000 Gates and his wife combined three family foundations and he donated stock value of $5 billion to his foundation. As of 2007 they had donated a total of $28 billion to charity, the plan is to eventually donate 95% of their wealth to charity. Bill Gates has also made many personal donations to colleges and the public school system. In 2017 he donated $100 million to Alzheimers research. Each of his children will recieve $10 million in their inheritance which will leave 99.96% given away.