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From the Editor
Last Updated Mar 10, 2026, 1:01am EDT
Elon Musk became the world's first trillionaire on June 12 when SpaceX went public.
SpaceX opened its first day of trading as a public company at a valuation of nearly $2 trillion. Musk owns 38% of the company (including options).
He is a cofounder of seven companies, including electric car maker Tesla, rocketmaker SpaceX and artificial intelligence startup xAI.
SpaceX, founded in 2002, acquired xAI in February in a deal that valued the combined company at $1.25 trillion. Twitter, which Musk bought in 2022, was merged into xAI nearly a year earlier.
He owns about 10% of Tesla, which he first backed in 2004, and which he's led as CEO since 2008. He also owns options to acquire another 8%.
While the bulk of his fortune is held in SpaceX and to a lesser extent Tesla, Musk also founded and has stakes in tunneling startup The Boring Company and brain implant outfit Neuralink.
Bachelor of Arts/Science, University of Pennsylvania
Did you know
Musk, who says he's worried about population collapse, has fathered at least 14 children with four 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.
In Their Own Words
I operate on the physics approach to analysis. You boil things down to the first principles or fundamental truths in a particular area and then you reason up from there.
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