17) Yoshiyuki Sankai (Net worth: $1.05 billion)

Japanese billionaire and academic made his fortune in robotics. His is the founder of medical robotics company Cyberdyne, the share price of which has quintupled since its March 2014 debut on Japan’s Mother’s market for start-ups.

16) Alexander Karp (Net worth: $1.2 billion)

Alexander Karp is one of the founders of private American computer software and services company Palantir Technologies, Inc. The company is worth approximately $15 billion.