What is Whitney MacMillan's Net Worth? Whitney MacMillan was an American businessman who had a net worth of $4.3 billion at the time of his death. That...
🌟 Public Figure · Updated: October 03, 2026 · 4 min read · FamsWorthHQ Financial Desk
Whitney MacMillan was an American businessman who had a net worth of $4.3 billion at the time of his death. That net worth made Whitney MacMillan the richest person in Minnesota for much of his adult life. Whitney died on March 11, 2020 at the age of 90.
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November 2026
Biography & Early Wealth Journey
His substantial net worth should come as no surprise when you consider his background. Whitney is a major heir to the famous Cargill fortune and is the last member of the family to serve as chief executive of the company. He held this position from 1976 on into 1995, when he stepped down in concession to his advanced age.
(Photo By CHARLES BJORGEN/Star Tribune via Getty Images)
Born in 1929, he was 66 years old when he stepped down, leaving him plenty of time to enjoy his retirement. That enjoyment is made easier by the fact that his stake in the highly successful corporation is $3.3 billion! All that wealth wasn't for nothing, though – during his time as Chief Executive Officer of the company, it grew from a $10 billion corporation to corporation worth upwards of $133 billion in revenue per year. He achieved this through diversifying the holdings and investments of the company. Trough his vision Cargill ascended to the very top of the grain industry, and became the largest privately held corporation in the world.
Financial Valuation Disclaimer: All net worth figures, annual salaries, and asset estimates presented on FamsWorthHQ are formulated using publicly accessible data, corporate filings, industry contract disclosures, and proprietary statistical modeling. Unless explicitly designated, figures represent estimated calculations and should be referenced for informational and comparative entertainment purposes.
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