More than 70 years ago Russ Gremel of Chicago purchased about $1,000 (£770) in Walgreen stock.
He never cashed it in and over the decades it grew to a whopping $2 million (£1.5m) in value.
Recently, at the age of 98, he donated those shares to the Illinois Audubon Society.
The money was used in the establishment of a wildlife refuge in Dixon, Illinois.
It covers roughly 400 acres and is home to about 170 bird species and a number of turtles.
The man has said that he gave the money away to do some good and noted that he 'just doesn't need it'.
Notably he's not actually a multi-millionaire or even close to such levels of financial comfort.
According to the Chicago Tribune he just enjoys the pleasures of a simple life and says his has been a 'hell of a good one'.