John H. MacMillan IV IV
Source of wealth: Cargill
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The scale of their wealth
Health
The price of life
Let's compare John H. MacMillan IV IV's fortune with the healthcare spending of a massive country
John H. MacMillan IV IV could fund the entire healthcare system of DR Congo, with a population of over 105,800,000 people, for approximately 0.5 years.
But even if we compare their fortune with that of a rich country
On the other end, John H. MacMillan IV IV could cover the healthcare spending of Luxembourg, considered the most heavily funded healthcare system in the world, for 0.2 years.
Education
Buying the future
Let's also compare their fortune with education spending, first with a poor country
John H. MacMillan IV IV could cover the total cost of Nigeria's education system, the most populous country in Africa with over 243,000,000 inhabitants, for 0.4 years.
And yes, we can also compare it with a rich country
But they couldn't just cover the cost of a poor country; Luxembourg is considered the country with the highest per capita investment in education in the world, and John H. MacMillan IV IV could pay for it entirely for 0.5 years.
Research
The monopoly on progress
Coming full circle, we think it's also interesting to add another gigantic country
John H. MacMillan IV IV could fully fund the state research budget of Pakistan, the fifth most populous country in the world with over 260,000,000 inhabitants, for 2.0 years.
And of course, the country that invests the most per capita worldwide
But even if we compare the total wealth of John H. MacMillan IV IV with Israel, the country that invests the most per capita in research in the world, they could cover the total cost of the system for 0.0 years.
Gold
Everyday luxuries
John H. MacMillan IV IV's fortune is equivalent to 8 tons of gold. It's hard to process, since we don't usually keep a handful of gold bars in our piggy banks.
A standard gold ring usually weighs between 4 and 7 grams. Let's say this one weighs 5 grams. It's usually 18 karats.
Based on today's gold price (excluding the jeweler's commission, shipping, or anything else), that ring would be worth $546.86.
John H. MacMillan IV IV could buy 2,196,693 gold rings. That's a lot of fingers and way too many gifts!!
And if you're struggling to visualize that many rings, it would take 0 trucks to transport them. Although John H. MacMillan IV IV will almost certainly have enough money left over to pay for the gas.
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.
Financial Assets
Financial assets information not available.
Monthly wealth history
Fortune comparison
Historical data not available for comparison