PETER GASSNER

$2.7

BILLION  SELF-MADE SCORE: * SOURCE: SOFTWARE AGE: 54 RESIDENCE: PLEASANTON, CA PHILANTHROPY SCORE: N.A. Gassner is cofounder and CEO of Veeva, a software firm that helps healthcare companies manage clinical trials and more. Shares of Veeva, of which he owns about 9%, are up more than 50% in the past year amid soaring profits.