75. NICHOLE MUSTARD
$430 million SOURCE: Personal finance AGE: 48 • RESIDENCE: Orinda, CA SELF-MADE SCORE: 9
A former financial planner, Mustard cofounded Credit Karma in 2007 with two others in an office above a San Francisco bar. Last December, tax planning giant Intuit paid $8.1 billion in cash and stock for the business. The site—which offers consumers access to credit scores and boasts more than 100 million members— operates as an independent brand under Intuit. Mustard continues to serve as its chief revenue officer.