Oxfam used Forbes' billionaires list that was last published in March 2016 to make its headline claim. According to the Forbes list, Microsoft founder Gates is the richest individual with a net worth of $75 billion. The others, in order of ranking, are Amancio Ortega, the Spanish founder of fashion house Inditex, financier Warren Buffett, Mexican business magnate Carlos Slim Helu, Amazon boss Jeff Bezos, Facebook creator Mark Zuckerberg, Oracle's larry Ellison and Bloomberg, the former mayor of New York.