No. Name Net worth (USD) Age Nationality Source(s) of wealth 1 Steady Bill Gates $75.0 billion Decrease 60 United States Microsoft 2 Increase Amancio Ortega $67.0 billion Increase 79 Spain Inditex 3 Steady Warren Buffett $60.8 billion Decrease 85 United States Berkshire Hathaway 4 Decrease Carlos Slim $50.0 billion Decrease 76 Mexico Telmex, Grupo Carso 5 Increase Jeff Bezos $45.2 billion Increase 52 United States Amazon.com 6 Increase Mark Zuckerberg $44.6 billion Increase 31 United States Facebook 7 Decrease Larry Ellison $43.6 billion Decrease 71 United States Oracle Corporation 8 Increase Michael Bloomberg $40.0 billion Increase 74 United States Bloomberg L.P. 9 Decrease Charles Koch $39.6 billion Decrease 80 United States Koch Industries 9 Decrease David Koch $39.6 billion Decrease 75 United States Koch Industries 11 Steady Liliane Bettencourt $36.1 billion Decrease 93 France L'Oreal