Whitney MacMillan

Whitney MacMillan was the last member of the Cargill-MacMillan family to serve as CEO of Cargill, America's largest private company, retiring in 1995. His 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.He sold his 50,000-acre Montana ranch in May 2016 for an undisclosed sum. The ranch, which was listed for $21.5 million, once hosted Lewis and Clark.