Elon Musk

Elon Musk commands an unprecedented portfolio of six high-stakes companies—Tesla, SpaceX, xAI, X (Twitter), Neuralink, and The Boring Company—while also serving as head of the Department of Government Efficiency under the Trump administration in 2025. His personal net worth peaked at $400 billion, the largest fortune ever recorded. SpaceX's Starship completed its first orbital cargo run, and Tesla's Optimus humanoid robot began beta testing in manufacturing plants, representing the decade's most ambitious engineering bets.