Abdullah bin Abdulaziz Al Saud was King of Saudi Arabia and Custodian of the Two Holy Mosques from 2005 until his death in 2015. He ascended to the throne last August 1, 2005, after his half-brother, King Fahd, died. He had a net worth of $18 billion.

Currently seated as the Chairman of the Safra Group of Companies, Joseph Safra is a Brazilian businessman and billionaire with an estimated net worth of $18.3 billion in May 2019. With his current net worth, he was named by Forbes as the 68th wealthiest person in the globe today.

Alexey Mordashov is a Russian oligarch and self-made billionaire with an estimated net worth of $18.7 billion in June 2019. He ranked 73rd in the list of World Billionaires and the 11th richest person in Russia. His business career began in 1988 when he joined Cherepovetskiy Metallurgical Plant as an economist. Shortly before the company was privatised, he served as the finance director in 1992. He founded his investment fund and bought up shares in the firm. Later on, he has amassed the largest stake in the steel mill. He became the general director in 1996.

American businessman Leonard Lauder has an estimated net worth of $19 billion in June 2019. He currently serves as the chairman emeritus of The Estée Lauder Companies Inc. which operates several cosmetic brands such as MAC Cosmetics, La Mer, Aveda, Clinique, Bobby Brown and Estee Lauder.

German businesswoman Susanne Klatten has an estimated net worth of $19 billion in June 2019. She is the fourth richest person in Germany.

Leonardo Del Vecchio is an Italian businessman. He ranks among the richest men in the world with an estimated net worth of $19.6 billion as of June 2019. His family eventually got ranked as one of the richest in Italy. His net worth has increased by an impressive $500 million since March 2011 because of an increase in the share prices of his company.

Sultan Hassanal Bolkiah is the head of state and Yangi-Di Pertuan of Brunei. He  has an estimated net worth of $20 billion as of 2008, according to Forbes. Hassanal Bolkiah is one of the world’s richest and has been head of state since 1967. Since 2009 his fortune hasn’t change according to Forbes magazine. He and Brunei weathered global recession with conservative economic policies and currency pegged to Singapore’s. But oil production is slowing and reserves are expected to last only 25 years, so the priority is aimed at trying to diversify the economy.

Sir Evelyn de Rothschild is a British financier who has an estimated net worth of $20 billion. He earned his wealth as a member of the well-known Rothschild family, and through his career in international finance, which includes serving as the financial advisor for Her Majesty Queen Elizabeth II.

Best recognized as a major shareholder in the diversified holding company, Icahn Enterprises, Carl Icahn is an American businessman with an estimated net worth of $20.1 billion in June 2019.

John Thomas Walton was born on October 8, 1946 in New Port, Arkansas, USA, and had an inflation-adjusted net worth of $21 billion at the time of his death. The son of Wal-Mart founder Sam Walton and a United States war veteran, he served as the chairman of True North Partners, a venture capital firm.