World's richest person Elon Musk's net worth rose by $24 billion to $335.1 billion on Monday as Tesla's shares surged 8.5% to all-time highs. His fortune is now more than three times that of the world's 10th richest person Warren Buffett, according to the Bloomberg Billionaires Index. The Berkshire Hathaway Chairman has a net worth of $104.1 billion.