World's Billionaires: Michael Dell Tops the List — September 17, 2026

Michael Dell closed out September 17, 2026 atop the World's Billionaires list, an estimated $414.30B, built primarily on Dell Technologies. Right behind: Elon Musk and Jeff Bezos follow in the next spots, at $397.17B and $266.28B respectively. Combined, the 51 people we track here are worth $3.84T, up $10.76B from the prior session.

Michael Dell posted the day's biggest gain, adding $13.85B (3.46%) to reach $414.30B (#1). The move traces to Dell Technologies (DELL), which climbed 3.64% on the day — most of a billionaire's daily swing simply follows their main stock's share price.

On the other side, Steve Ballmer took the day's steepest loss, down $2.27B (1.33%) to $168.27B (#9). The move traces to Microsoft (MSFT), which fell 1.37% 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 $77.04B. Mukesh Ambani was the day's biggest move in that group, down $452.71M (0.58%) to $77.04B.

Among the 11 women we track, Alice Walton stays on top at $103.75B. Alice Walton was the day's biggest move in that group, down $295.00M (0.28%) to $103.75B.

Among the 8 billionaires under 45 we track, Mark Zuckerberg stays on top at $265.66B. Mark Zuckerberg was the day's biggest move in that group, up $1.07B (0.41%) to $265.66B.

Larry Ellison made the biggest rank jump, climbing from #9 to #8, with Steve Ballmer also moving up. Steve Ballmer slipped the furthest, from #8 to #9, alongside Larry Ellison.