122. Diane Hendricks
The Wisconsin native grew up on a dairy farm and longed to “go to the city, wear a suit,” she says, but her dream was interrupted when she got pregnant in high school and gave birth a month before her 18th birthday. Hendricks had to study at home to graduate high school. The young mom met her future husband Ken, who dropped out of high school to work as a roofer, when she was 21. Together the couple bought and remodeled rental homes, ran roofing and trucking businesses, and opened a carpet store before starting roofing distributor ABC Supply. (Ken died in 2007.) Today the $7.2 billion (sales) company has over 700 branches. Hendricks, who still chairs ABC, has become an advocate for technical education and donates to local schools to start skilled-trade programs for teenagers.