Based in London, Hohn is known for his activist investments, where he shakes up boards and management of companies in which he owns shares.
Billionaires from China, Hong Kong, The Philippines, India, South Korea, Singapore and Vietnam are giving the big names a run for their money
Ms Dos Santos, 46, is one of the world's richest women, with Forbes magazine estimating her fortune to be worth $2.2bn, making her the richest woman in Africa.
Lau, 68, is the controlling shareholder of Chinese Estates Holdings, a Hong Kong property developer that builds offices, shopping malls and housing projects.
Barber went on to call out mining billionaire Gina Rinehart, in particular. Rinehart is the richest person in Australia, worth some $15 billion.
The Bahamas may be best known for its sun-kissed beaches and crystal-clear waters, but the archipelago is also home to a robust financial services industry that is committed to maintaining the highest regulatory standards
The Palo Alto, California, mega estate, which comes with a “pizza room,” was built from scratch by Scott McNealy
One of those critics, Anand Giridharadas, has pointed out that many billionaires use their philanthropy to deflect potential criticism about their harmful business practices in the hopes of avoiding tighter government regulation of their companies.