#3042
John H. MacMillan IV IV
United States 74 years old
Overview
- Source of Wealth
- Cargill
- Industry
- Food & Beverage
- Residence
- Minneapolis, Minnesota
Biography
John G. MacMillan IV is one of 21 billionaire heirs to Cargill, America's largest private company.
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 $154 billion in 2025 sales across food, agriculture, financial and industrial divisions.
The Cargill-MacMillan family collects an estimated 18% of net profits as dividends every year.
He's one of nine billionaire siblings who inherited stakes in the company from their father John H. MacMillan III, who died in 2008.