Biography
John MacMillan is one of the 12 billionaire heirs to Cargill, the world's largest private company. Born in Minneapolis, Minnesota, in 1928, John started his career with Cargill in 1955. Over the years, he held various positions within the company, contributing to its growth and expansion. As a descendant of the company's founder, W.W. Cargill, John's wealth primarily stems from his ownership stake in the food and agriculture giant. As of December 2025, his estimated net worth is $1.5 billion. He is also recognized for his philanthropic activities, contributing to various charities and organizations. John MacMillan passed away in 2008, leaving behind a legacy of business acumen and commitment to charitable causes.
