From McDonald’s eggs to your salt: Meet the secret American family with most billionaires running the world’s food supply

The Cargill-MacMillan family is believed to have more billionaires than any other family in the world, according to Logan Weaver, founder of Surmount Invest.

In a viral post on X, Weaver called them “the richest invisible dynasty” and explained why most people have never heard their name — despite their immense influence.

“There’s an American family with 14 billionaires. More than any family on Earth. And they control the ENTIRE global food supply. It’s not the Waltons. It’s not the Kochs. 99% of people have never heard their name,” he wrote.

The Birth of a Hidden Empire

With a combined net worth of $65 billion, the Cargill-MacMillans own 88% of Cargill Inc., America’s largest private company, generating $177 billion in annual revenue.

It all began in 1865, when 21-year-old William Wallace Cargill opened a single grain storage facility in Iowa during the post-Civil War chaos. His insight was simple but powerful: control storage, control trade. By the 1870s, he brought in his brothers, expanded into buying grain directly from struggling farmers, and shipped it to cities for hefty profits.

Cargill became the ultimate middleman — buying low from farmers competing with each other, selling high to cities competing for scarce supply. Soon, William expanded into flour mills, feed companies, and processing plants, controlling every stage from farm to table.

From Crisis to Global Power

When William died in 1909, the company was drowning in debt. His son-in-law, John MacMillan Sr., took over and made a pivotal decision: Cargill would remain private forever.

Freed from shareholder pressure, MacMillan restructured the company in the 1910s, expanded globally in the 1920s, and thrived during both the Great Depression and World War II by buying assets cheaply and feeding entire armies.

Decades of Expansion

1940s: Entered animal feed and soybean processing

1960s: Became a commodities trading giant

1980s: Bought meat processing plants

2000s: Acquired global food companies

Today, Cargill’s reach is staggering. From McDonald's egg to chocolate, salt, and oil, Cargill supplies wide range of food items, Weaver said.

As per the post, along with three other companies, the company dominates up to 90% of the global grain trade

Surprisingly, the family remains virtually unknown despite having 155,000 employees across 70 countries. Notably, about 90 family members own the company; 14 of them are billionaires.

In the post, Weaver advised, "The most powerful families don’t chase headlines — they control what the world can’t live without. While the public obsesses over flashy tech IPOs, generational empires are built on everyday essentials. Build wealth through consistent, long-term plays. Ignore short-term hype. Own something essential."