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Larry Ellison's $302 billion makes him the world's third-richest person.

He owns more than 40% of the company and can gain or lose tens of billions when the stock moves.

Larry Ellison's place among the world's richest people now rises and falls on the stock market's wager that the AI boom requires Oracle's machines.

Oracle (ORCL) jumped nearly 8% Monday, lifting Ellison's net worth by $21.4 billion to $302 billion and making him the world's third-richest person, according to the Bloomberg Billionaires Index. The gain carried him past Amazon.com's (AMZN) Jeff Bezos and Google cofounder Sergey Brin. (Larry Page, Brin's counterpart, sits between Oracle and top dog Elon Musk.)

It's been another fast climb for Ellison, who slipped to sixth on the Bloomberg list at about $195 billion in April, before Oracle's late-May surge reversed the slide.

Ellison owns more than 40% of Oracle, so his wealth tracks the stock almost tick for tick. Shares rose about 40% in May, before jumping again Monday to close near $248, a 2026 high.

Ellison also owns a 1.4% stake in Tesla (TSLA), a sailing team, and real estate, including the Hawaiian island of Lanai.

Oracle's most recent quarter posted revenue up 22% from a year earlier to $17.2 billion, with cloud revenue up 44% to $8.9 billion.

When Wall Street has soured on the AI trade, Ellison's fortune has fallen with it. Oracle's stock had fallen about 58% from its September high to a February low of about $136, before a late-spring rally pulled it higher again.

Musk, the world's richest person, has some separation between himself and Page, Ellison and the rest. Bloomberg estimates his net work at $721 billion.

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