Net worth: $3.8 billion
Country: United States
Source of wealth: Roofing – ABC Supply
Overall Forbes rank: #353
With her late husband, Kenneth, Ms. Hendricks co-founded ABC supply, the largest wholesale distributor of roofing, window, and siding materials in the US. Headquartered in Beloit, Wis., the company has 500 locations and employs approximately 5,800 people. Hendricks also oversees commercial property and several smaller companies via Hendricks Holdings Co., with dealings in manufacturing plants and pharmaceutical research. She lives in Afton, Wis., and has seven children.