Gwendolyn Sontheim Meyer

Cargill heir Gwendolyn Meyer, the daughter of the late Marion MacMillan Pictet, is one of seven billionaire relatives who hold a majority of Cargill, the largest private company in the U.S. Cargill, based in Minneapolis, makes money in all areas of food production, from animal feed, meat, and crops to commodity trading and risk management.The company divested itself of its stake in fertilizer maker Mosaic in 2011. William Cargill, the son of a Scottish sea captain, founded the company, then an Iowa grain storage business, after the Civil War. Will's son-in-law John MacMillan took control in 1909, and no family member has run the company since Whitney MacMillan stepped down as chief executive in 1995. Attended Dana Hall, Menlo College and San Diego State University.