Elon Musk

Net worth: ~$240 billion (March 2026). CEO of Tesla and SpaceX, owner of X (formerly Twitter). His wealth fluctuates by tens of billions daily based on Tesla's stock price. In 2024-2025, Tesla's robotaxi pivot and SpaceX's Starship success pushed him back to #1. He was briefly #2 to Arnault in 2023. Source: Forbes Real-Time Billionaires List.