World's Billionaires: Elon Musk Tops the List — September 15, 2026

Elon Musk closed out September 15, 2026 atop the World's Billionaires list, an estimated $397.54B, built primarily on Tesla, SpaceX. Right behind: Michael Dell and Jeff Bezos follow in the next spots, at $394.00B and $273.26B respectively. Combined, the 51 people we track here are worth $3.85T, down $12.28B from the prior session.

Larry Page posted the day's biggest gain, adding $7.62B (3.03%) to reach $259.57B (#5). The move traces to Alphabet (Google) (GOOGL), which climbed 3.22% on the day — most of a billionaire's daily swing simply follows their main stock's share price.

On the other side, Michael Dell took the day's steepest loss, down $23.11B (5.54%) to $394.00B (#2). The move traces to Dell Technologies (DELL), which fell 5.82% on the day — most of a billionaire's daily swing simply follows their main stock's share price.

Among the 7 Indian billionaires we track, Mukesh Ambani stays on top at $78.18B.

Among the 11 women we track, Alice Walton stays on top at $104.54B. Alice Walton was the day's biggest move in that group, up $965.00M (0.93%) to $104.54B.

Among the 8 billionaires under 45 we track, Mark Zuckerberg stays on top at $262.96B. Mark Zuckerberg was the day's biggest move in that group, up $6.15B (2.39%) to $262.96B.

Elon Musk made the biggest rank jump, climbing from #2 to #1, with Michael Dell also moving up. Michael Dell slipped the furthest, from #1 to #2, alongside Elon Musk.