World's Billionaires: Michael Dell Tops the List — September 18, 2026

Michael Dell closed out September 18, 2026 atop the World's Billionaires list, an estimated $431.88B, built primarily on Dell Technologies. Right behind: Elon Musk and Jeff Bezos follow in the next spots, at $400.51B and $271.09B respectively. Combined, the 51 people we track here are worth $3.89T, up $48.25B from the prior session.

Michael Dell posted the day's biggest gain, adding $17.58B (4.24%) to reach $431.88B (#1). The move traces to Dell Technologies (DELL), which climbed 4.46% on the day — most of a billionaire's daily swing simply follows their main stock's share price.

On the other side, Warren Buffett took the day's steepest loss, down $2.20B (2%) to $107.91B (#11). The move traces to Berkshire Hathaway (BRK-B), which fell 2.04% 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 $77.25B. Mukesh Ambani was the day's biggest move in that group, up $208.10M (0.27%) to $77.25B.

Among the 11 women we track, Alice Walton stays on top at $103.40B. MacKenzie Scott was the day's biggest move in that group, up $470.70M (1.12%) to $42.61B.

Among the 8 billionaires under 45 we track, Mark Zuckerberg stays on top at $268.81B. Mark Zuckerberg was the day's biggest move in that group, up $3.15B (1.19%) to $268.81B.

Larry Ellison made the biggest rank jump, climbing from #8 to #7, with Jensen Huang also moving up. Jensen Huang slipped the furthest, from #7 to #8, alongside Larry Ellison.