David Sun is the co-founder of Kingston Technology Company, Inc. in 1987 and he has an estimated net worth of $6.28 billion as of March 2017, according to Bloomberg. He is the 170th richest person in the “Forbes 400” list and the 554th in the list of World Billionaires.

On October 17, 1987, Sun and his business partner John Tu founded their second company, Kingston Technology, in order to address the severe shortage of surface-mount memory chips in the high-tech marketplace in the 80's. They combined their engineering expertise to design a revolutionary new Single In-Line Memory Module (SIMM) that utilized readily available, older through-hole components.

In 1996, Sun and Tu sold Kingston to venture capital firm Softbank for $1.5 billion. Today, it is the world’s largest independent manufacturer of memory products. It has more than 4,000 employees around the world. Based in Fountain Valley, California, the private company has beaten its competitors on price by using pared-down packaging as well as closely monitoring supply shipments so as to avoid holding onto excess inventory.

David Sun is also a philanthropist. He is the president of the David and Diana Sun Foundation which has given millions of dollars in the last few years for the benefit of the vocational schools and high schools in his birth country.