Musk, who says he's worried about population collapse, has nine children with three women, including triplets and two sets of twins.
As a kid in South Africa, Musk taught himself to code; he sold his first game, Blastar, for about $500.
Elon Musk cofounded six companies, including electric car maker Tesla, rocket producer SpaceX and tunneling startup Boring Company.
He owns about 23% of Tesla between stock and options, and has pledged some of his shares as collateral for loans.
SpaceX, founded in 2002, is worth $127 billion after a funding round in May 2022; it quadrupled its value in three years.
Boring Company, which aims to defeat traffic, raised $675 million in April 2022 at a $5.7 billion valuation.
Twitter's board agreed to sell the company to Musk for $44 billion in April 2022, after he disclosed a 9.1% stake and threatened a hostile takeover.
The deal closed in October 2022 after Musk tried to back out and Twitter sued. Musk owns an estimated 74% of the company, which is now called X.
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