54. Janice Bryant Howroyd
$350 Million Age 65 Residence las Vegas
CEO of $925 million (est. 2016 net sales) ActOne Group, which provides workforce solutions including temporary staffing, she opened the business in Los Angeles in 1978 with $1,500 including a $900 loan from her mother, a fax machine and a phone. She credits her mom and dad, who raised 11 children, for teaching her such lessons as how to make a lot from a little.