25 of the Largest Private Companies in America

America's biggest private companies operate on a scale that is easy to underestimate because they do not appear in the daily stock-market conversation. Some employ tens of thousands of people, generate tens of billions of dollars in annual revenue and control supply chains that stretch across food, manufacturing, retail, finance and industrial services. Cargill, Koch, Publix and Mars are among the best-known examples, but the group extends far beyond household names.

There is no perfect real-time ranking. Private companies are not required to publish the same financial detail as listed corporations, and revenue figures can come from company disclosures, bond documents, industry data or carefully sourced estimates. This guide therefore focuses on businesses that consistently appear near the top of major private-company rankings and have substantial US operations. It should be read as a scale guide rather than a live audited league table.

Agriculture and industrial businesses dominate the top tier

Cargill is the clearest example of a private company operating with the reach of a public multinational. The Minnesota-based business spans agricultural commodities, food ingredients, animal nutrition, risk management and transportation. Koch is similarly broad, with operations in refining, chemicals, industrial technology, building materials and other sectors. Both show why private ownership is common in capital-intensive businesses where owners may value long investment horizons over quarterly market expectations.

Other large industrial names include Reyes Holdings, which operates major beverage and food distribution businesses, and Enterprise Products Partners' privately held affiliated businesses within the broader Duncan family network. The exact boundaries between private operating companies and public affiliates can matter, which is another reason rankings should be interpreted carefully.

Retail creates some of America's largest private employers

Publix is one of the country's largest employee-owned companies and a major grocery operator across the Southeast. H-E-B has built a dominant position in Texas, while Meijer remains a large family-owned retailer in the Midwest. These businesses compete directly with public giants such as Walmart and Kroger while retaining ownership structures that give them more freedom over investment and succession.

Retail also demonstrates that private does not mean small or regional. A company can have thousands of stores, logistics centres, private-label manufacturing and sophisticated digital operations without public shareholders. For suppliers and jobseekers, these businesses often matter just as much as listed competitors.

Finance and professional services add another group

Fidelity Investments is one of the most consequential private financial-services groups in the country, spanning brokerage, retirement, asset management and workplace benefits. Edward Jones, a partnership, occupies a different part of the market with a large network of financial advisers. Deloitte's US operation also illustrates how professional-services partnerships can achieve enormous scale outside the public-company model.

The economics differ from industrial firms, but the ownership advantage can be similar. Private financial and professional-services firms can reinvest without having to justify every quarter to public shareholders. The trade-off is lower transparency for outsiders, which makes comparison more difficult.

Why private ownership persists at enormous scale

The largest private companies tend to have one of three characteristics: concentrated family ownership, employee ownership or partnership structures. Those models can support long-term planning, keep control within a founding family or align economics directly with employees and partners. They can also reduce the pressure to pursue acquisitions or financial targets simply to satisfy a public market narrative.

Private status does not remove capital constraints. Large private businesses still borrow, issue bonds, sell minority stakes and maintain relationships with banks and institutional investors. What changes is the ownership market. There is no daily share price and generally less public disclosure, so outsiders rely more heavily on credit documents, company reporting and independent rankings.

How to compare America's biggest private companies

Revenue is the most common measure because it is available for more private companies than profit or enterprise value. Even revenue can be misleading across sectors. A commodities trader can generate enormous sales on thin margins, while a software or financial company can produce much higher margins on a smaller revenue base. Employee count provides another useful view, especially for retailers and service businesses.

For that reason, the most useful question is not simply which company is first. It is which private businesses have enough scale to shape their industries. Cargill in agriculture, Koch in industrials, Mars in consumer products, Publix and H-E-B in grocery, Fidelity in finance and major private distributors all meet that test.