When it comes to billionaire graduates from business schools, nowhere comes close to the United States and to Harvard University in particular.
Harvard has produced 335 Rhodes scholars and 150 Nobel laureates but its reputation as the world's foremost billionaire business school is rarely mentioned. According to Wealth-X, the Harvard business school has churned out 64 billionaires. This is far more than second placed Stanford's 23 and Columbia's 14.
This chart shows the top business schools for billionaire alumni.
You will find more statistics at Statista