Billionaire Profile
John MacMillan
Global Rank
#2422

Image: Peter Aitkens | CC BY-SA 2.0 | via Wikimedia Commons

John MacMillan

CEO, Cargill
UNITED STATES
Real-Time Net Worth
$1.705B
Estimated based on Cargill stock value as of April 20, 2026
0% (24h)
Age
80
Source
Cargill
Industry
food-beverage
Citizenship
UNITED STATES

Biography

John MacMillan (born February 28, 1928, died April 23, 2008) was an American billionaire businessman and a descendant of the founder of Cargill. He began his career at Cargill in 1955, holding various positions and showcasing leadership. In 2007, Forbes estimated his net worth to be $1.7 billion. MacMillan's career at Cargill spanned several cities. He was married twice and had nine children. His influence stemmed from his deep roots in the company, which he helped steer through various challenges, contributing significantly to its growth and success. He died at the age of 80.

Fact Checked
Verified by Editorial Team
Live Data
Updated 4/20/2026

Wealth Over Time

In-Depth Profile

Early Life

John Hugh MacMillan III was born on February 28, 1928, in Minneapolis, Minnesota. He was the son of John H. MacMillan Jr. and Marion Dickson. He grew up in Wayzata, Minnesota, and attended the Blake School, Berkshire School, West High School, and the University of Minnesota.

Rise to Success

MacMillan began his career at Cargill in 1955, a company founded by his great-grandfather. He held positions in Great Falls, Montana, Baton Rouge, Louisiana, and Minneapolis. His career demonstrated his commitment to the family business and his ability to lead in various locations.

Key Business Strategies

John MacMillan's career was marked by his dedication to Cargill, a privately held global corporation dealing in agricultural commodities and food products. His focus was on contributing to the growth and success of the family business across different roles and locations.

Philanthropy

While specific details of John MacMillan's philanthropic initiatives aren't readily available, his involvement with Cargill suggests a commitment to community involvement and supporting initiatives related to food security, climate resilience, and economic opportunities, which were part of Cargill's broader philanthropic efforts.

Career Milestones

1955

Began Career at Cargill

Started working for Cargill, the family-founded company, in various positions.

2007

Forbes Net Worth Estimation

Forbes estimated his net worth to be $1.7 billion.

2008

Died

Passed away in Fort Lauderdale, Florida.

Philanthropy & Social Impact

Food Security, Climate Resilience, Economic Opportunity

Cargill Initiatives

$110M

Cargill invested more than $110 million in its communities, partnering locally and globally to advance food security, climate resilience and economic opportunity.