There are two types of rich people: the flashy and generous, who can always be counted on the pick up the tab and fly their friends out to private islands on a whim, and the almost embarrassingly miserly, the latter of whom always tend to be far wealthier. We suppose the whole "cheap rich person" stereotype exists for a reason - after all, their money-saving ways are the reason they have so much in the bank. But if you think your trust fund friend who always Venmo requests you down to the cent is bad, they've probably got nothing on these famously frugal Forbes List-toppers.

[Photo via Getty]