THE WORLDS BILLIONAIRE LIST 2017: Bill Gates #1 Born William Henry Gates III October 28, 1955 (age 61) Seattle, Washington , U.S. Residence Medina, Washington , U.S. Years active 1975–present Net worth US$ 87 billion ( 2017) Title Technology Advisor of Microsoft Co-Chairman of the Bill & Melinda Gates Foundation CEO of Cascade Investment Chairman of Branded Entertainment Network Chairman of the TerraPower Board member of Microsoft Berkshire Hathaway Spouse(s) Melinda Gates ( m. 1994 ) Children 3 Parent(s) William H. Gates Sr. Mary Maxwell Gates Website gatesnotes .com Signature