Warren Buffett is an 80-year-old American business magnate and investor who serves as CEO of Berkshire Hathaway. He is known for his nearly untouchable investment record, with annual gains of 20.2% from 1965-2010 compared to 9.4% for the S&P 500. Despite his immense wealth as one of the richest people, he lives frugally in his original home and drives his own car. Buffett faced setbacks when his wife left him but maintained good relations and later remarried. He has pledged to donate over 99% of his wealth to philanthropic causes through the Gates Foundation within 10 years of his death.