Larry Page, $50.8 Billion
CEO of Alphabet Inc., the parent company of Google, Larry Page is cited as the co-founder of Google alongside Sergey Brin. Both he and Brin remain in charge of both Google and Alphabet, though they have rearranged their roles and assets multiple times.
Charles Koch, $60 Billion
As CEO of Koch Industries, he and his late brother David each owned 42% of the company. Originally an oil and chemical refinery company, Koch Industries now processes pollution control equipment. He was ranked the 11th-richest person in the world in 2019.