Glen Taylor, Minnesota
Taylor's $2.9 billion was founded in the printing business. He bought a wedding service business for $2 million in 1975 and converted it into Taylor Corp., a printing firm with $2 billion in sales. He also has stakes in the NBA's Timberwolves, WNBA's Lynx, and the Minneapolis Star Tribune.
Thomas & James Duff, Mississippi
The Duff brothers have $1.3 billion in the tire industry. They founded and co-own Duff Capital Investors, and one of the firm's biggest assets is the commercial tire dealer Southern Tire Mart.