Harvard has topped many of the "rich lists" that rank universities: Richest endowment, most billionaire graduates, richest students. Now, it adds another rich distinction: The largest number of alumni worth $30 million or more.

According to a new report from Wealth-X, 3,130 of Harvard's alumni are "ultrahigh net worth individuals" worth at least $30 million—the most of any university. That's about 1 percent of its total graduates.

By comparison, the top 1 percent of all Americans by wealth have a minimum net worth of around $7.8 million—meaning the richest 1 percent of Harvard grads are nearly four times as wealthy as the richest 1 percent of Americans.