JOE MANSUETO

$3.9

BILLION  SELF-MADE SCORE: * SOURCE: INVESTMENT RESEARCH AGE: 63 RESIDENCE: CHICAGO PHILANTHROPY SCORE: Mansueto bought Chicago’s iconic Wrigley building and the 297-unit Belden-Stratford apartment building in 2018, spending $360 million on Windy City real estate. The Morningstar founder stepped down as CEO in 2016 but is still executive chairman of the publicly traded research firm, known for its mutual fund research and star ratings. Mansueto’s first job: washing dishes in the kitchen at a hospital. He later sold soda from his college dorm and Christmas trees from a rented lot.