6. Larry Ellison
Larry Ellison is cofounder, chairman, and CTO of the technology giant Oracle. He owns 35% of the company, bringing his net worth to $104.6 billion. He gave up the role of CEO in 2017 after nearly 40 years at the helm. In 2012, Ellison purchased most of the Hawaiian island Lanai for ~$300 million, building a hydroponic farm and luxury spa. He also serves as a board member of Tesla after purchasing 3 million shares in 2018.
