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Billionaire Index

A daily ranking of the world's richest people

Last updated: November 11, 2026 · $11.70T tracked

Methodology

No. 103United States

David Sun

Computer hardware · Irvine, California

Net worth

$24.5B

Today

$00.00%

Past month

−$9.2B−27.29%

As of Nov 11, 2026, 1:50 PM EST

David Sun cofounded and helps run Kingston Technology, which makes storage and memory products, as COO from a cubicle on the sales floor. With longtime partner John Tu, Sun launched a computer memory business out of a garage and sold it to now defunct PC maker AST a few years later. The pair started Kingston by making surface-mount memory chips after losing most of their first fortune in the stock market. Sun and his wife, Diana, have a foundation that provides grants to education programs for under-served youth in the U.S. and Taiwan. The company's name comes from one of John Tu's favorite bands, the Kingston Trio.

Net worth over time

−27.29%−$9.2B over the past month
$34B$28B$22B
Oct 12Nov 11

Principal holdings

1 positions
CompanyShareValue

Private holdings

100.0%$24.5B

Also known for

  • Sun met longtime business partner John Tu in a basketball league in 1978.