10. DORIS FISHER

$2.9 billion  SOURCE: Gap AGE: 89 • RESIDENCE: San Francisco SELF-MADE SCORE:  Fisher cofounded Gap (short for “generation gap”) with her late husband, Don (d. 2009), 52 years ago after the couple struggled to find jeans that fit him. In July, Gap announced it would permanently close all its stores in the U.K. and Ireland. The retailer launched its much-anticipated collaboration with Kanye West’s Yeezy line in June to rave reviews.