RODGER RINEY

$3.6

BILLION  SELF-MADE SCORE: & SOURCE: DISCOUNT BROKERAGE AGE: 73 RESIDENCE: ST. LOUIS PHILANTHROPY SCORE: Soon after college, Riney turned down a job at a top engineering firm to accept a position for less pay at an investment company instead. He later quit and moved to Scottsdale, Arizona, where he cofounded the online brokerage company Scottrade in 1980. He sold it to Joe Ricketts’ (No. 333) TD Ameritrade for $4 billion in cash and stock in 2017, two years after he was diagnosed with the blood cancer multiple myeloma. He has since donated $40 million to Washington University to research the disease and develop treatments for neurodegenerative illnesses.