Pauline MacMillan Keinath

Pauline MacMillan Keinath is believed to be the largest shareholder of Cargill, the largest food company in the world, with an estimated 12% stake. Her brother Whitney MacMillan was the last member of the family to serve as CEO of the business, but he retired in 1995. Her great-grandfather, W.W. Cargill, founded the business as a single grain warehouse on the end of an Iowa railroad line in 1865.The family still owns roughly 90% of Cargill, which did $115 billion in 2018 sales across food, agriculture, financial and industrial divisions.