Forbes magazine listed ABC Supply owner Diane Hendricks on its 2013 ranking of the 400 richest Americans released Monday.

Hendricks is the sole owner of Beloit, Wis.-based ABC Supply, which ranked No. 1 on the 2013 ProSales 100 with $4.65 billion in sales in 2012. The company is a wholesale distributor of roofing, siding, windows and other exterior building products, tools and related supplies in the U.S.

“Earlier this year she bought out the remaining minority shareholders and now holds 100% of the company,” Forbes profile on Hendricks says. “She co-founded ABC in 1982 with her husband and business partner, Kenneth Hendricks, who suffered a fall while checking construction repairs at his home and died in 2007.”

The magazine notes that the company’s sales are projected to pass the $5 billion mark this year and that Hendrick holds more than “25 million square feet of commercial property and 25 smaller companies via Hendricks Holding Co., including manufacturing plants, recycling businesses and pharmaceutical research.”

Hendricks, 66, is a resident of Afton, Wis., has a high school diploma, and is the mother of seven children, according to the magazine.

She is tied with six others at the 103 spot on the Forbes 400 with a net worth of $4.4 billion.

At the top of the annual ranking are Bill Gates with $72 billion, Warren Buffett with $58.4 billion, and Larry Ellison with $41 billion.