Bill Gates has climbed back to the top of Forbes' list of the 400 wealthiest Americans, with a total net worth of $81.2 billion. The next richest American on the list of Warren Buffett, who has $13.4 billion less than Gates, with $67.8 billion.
Considering Gates has donated close to a third of his money, or around $30 billion, is massive. Gates has donated the $30 billion to charity, mostly through the Bill & Melinda Gates Foundation. With that much money on its own, you could be the 16th most richest person in the United States. Over the past 12 months, Gates has added $9 billion to his net worth, mostly due to big gains in Microsoft shares.
Gates' return on his investments in Canadian National Railway and trash company Republic Services are also providing him with a nice injection of cash. He also owns a big chunk of stock in tractor maker Deere & Co. and South American McDonald's franchise, Arcos Dorados.