Warren Buffett, often touted as the Oracle of Omaha, is regarded as one of the most successful investors of all time and the sixth-richest man in the world, with a net worth of $121.1 billion, according to Forbes Real Time Billionaires list. While many people believe Buffett's net worth comes from his savvy investments, he owns several highly profitable businesses through his holding company Berkshire Hathaway Inc. "First, we invest in businesses that we control, usually buying 100% of each. Ber