49. CARL COOK

$9.7

BILLION  SELF-MADE SCORE: # SOURCE: MEDICAL DEVICES AGE: 57 RESIDENCE: BLOOMINGTON, IN PHILANTHROPY SCORE: N.A. Cook is the CEO of Cook Group, a medical device manufacturing company with $2.4 billion (sales) that his parents founded out of an apartment in Bloomington, Indiana, in 1963. He took over after his father, Bill, passed away in 2011.