Image copyright AFP/Getty. Image caption Bill Gates has been named the world's richest person for 16 of the last 20 years. Bill Gates has been declared the richest man in the world for the 16th time by Forbes magazine's annual ranking of global billionaires. The Microsoft founder once again beat Mexican businessman Carlos Slim to the top spot. Mr Gates' net worth rose by just over $3bn (£1.94bn) in the year to 13 February, to $79bn.