Wealth-X's database includes more than 100,000 global records, each representing an individual whose net worth is believed to be more than US$30 million.
In 2017, Wealth-X published a list of the top wealthiest people in the world, which have a combined fortune of US$1.45 trillion. As of 2017, the five richest persons in the world are:
Jeff Bezos (US$ 98.6 billion)
Bill Gates (US$ 87.4 billion)
Amancio Ortega Gaona (US$ 66.8 billion)
Warren Buffett (US$ 60.7 billion)
David Koch (US$ 47.4 billion)