There are well-heeled stock investors who believe in holding a tightly concentrated portfolio, and those more comfortable with a long list of diversified titles. Judging by the charity-focused investment vehicle that bears his surname, Microsoft (NASDAQ: MSFT) co-founder and former CEO Bill Gates belongs firmly in the first camp. The three ranked by total dollar value as of the end of 2024 are Microsoft, Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B), and Waste Management (NYSE: WM).