Today, the 77-year-old has an estimated net worth of $20.9 billion — nearly double her reported net worth from just two years ago — topping Forbes' most recent list of America's Richest Self-Made Women for the seventh year in a row. Her fortune is largely from her roofing supplies ABC Supply. ABC Supply brought in $20.4 billion in revenue last year and has more than 900 branch locations, according to Forbes. After she met and married roof contractor Ken Hendricks in the 1970s, the duo co-founded ABC Supply. The company hit $1 billion in annual sales for the first time in 1998, according to the company's website.

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Persons: Diane Hendricks, Erik Prince, Hendricks, Forbes, —, I'd, Ken Hendricks Organizations: Blackwater, Beloit College, Forbes, Supply, ABC Supply Locations: Beloit, Wis, Osseo , Wisconsin, Beloit , Wisconsin