CEOWORLD magazine - Profiles - John MacMillan
John MacMillan


  • John MacMillan is one of 12 billionaire heirs to Cargill, the world’s biggest agriculture business.
  • His great-great-grandfather, W.W. Cargill, founded the business as a single grain warehouse on the end of an Iowa railroad line in 1865.
  • Net worth: $1.6 billion
  • The family still owns roughly 90% of Cargill, which did $114.6 billion in 2020 sales across food, agriculture, financial and industrial divisions.
  • The Cargill-MacMillan family collects an estimated 18% of net profits as dividends every year