Larry Ellison was born on the Lower East Side of New York during World War II, back when that district was still poor and teeming with immigrants striving to survive. At an early age, Ellison contracted pneumonia and was sent to the South Side of Chicago to live with relatives. Despite these obstacles, he was able to educate himself and join Software Development Laboratories, in 1977.
This was a crucial move, because in 1982 the company became Oracle. This is a company that brings in $38 billion every single year, and along the way, Ellison — who stepped down as CEO in 2014 — managed to accumulate over $46.2 billion in net worth.