The biggest family fortunes in the United States have largely been built through businesses that have existed for generations rather than overnight success stories. Many of these companies remain privately owned or are still heavily controlled by founding families, allowing wealth to be passed down while expanding into new markets. Retail, food production, finance, manufacturing, hospitality and media continue to dominate the list, showing that long-established businesses remain at the heart of America’s largest family fortunes. As reported by Forbes 2026, check below the top 10 families whose combined wealth reaches well beyond one trillion dollars. The Waltons and Mars family, are recognised worldwide, while others have built vast fortunes through industries that receive far less public attention. Together, these families represent decades of business growth, careful succession planning and multigenerational ownership that continues to shape the American economy.
Top 10 richest families in America in 2026
America’s richest families and their billion-dollar business empires
Walton family
Estimated net worth: $520 billionThe Walton family remains America’s wealthiest family by a wide margin, with its fortune built on Walmart, the world’s largest retailer. Founded by Sam Walton in Arkansas in 1962, the company transformed discount retailing through its large-format stores and efficient supply chain. Although Walmart is now a global corporation with thousands of locations, members of the Walton family continue to own significant stakes in the business. Four generations have benefited from the company’s growth, making the family the richest in the country once again in 2026.
Koch family
Estimated net worth: $157 billionThe Koch family’s wealth comes from Koch, Inc., one of the largest privately owned companies in the United States. Originally established as an oil business, the company gradually expanded into chemicals, manufacturing, energy, commodities, paper products and numerous other industries. Because the business has remained privately held, the family has retained considerable control over its operations and wealth. Based in Wichita, Kansas, the Koch family’s fortune has now passed through four generations.
Mars family
Estimated net worth: $129 billionThe Mars family built one of the world’s biggest privately owned food companies. Mars, Inc. produces globally recognised chocolate brands alongside pet food, snacks and other consumer products sold across dozens of countries. The company has deliberately remained private throughout its history, helping preserve family ownership over six generations. Its headquarters in McLean, Virginia, continue to oversee a business that has expanded far beyond confectionery.
(Edward) Johnson family
Estimated net worth: $69.5 billionThe Johnson family owes its fortune to Fidelity, one of the largest investment management and financial services firms in the world. Established in Boston, the company manages trillions of dollars on behalf of individual and institutional investors. Family leadership has remained a defining feature of Fidelity for decades, with four generations contributing to the firm’s long-term development. Finance remains the sole foundation of the family’s wealth.
Cargill-MacMillan family
Estimated net worth: $67.9 billionThe Cargill-MacMillan family traces its wealth to Cargill Inc., a company deeply connected to agriculture and global food supply chains. The business handles grain trading, food production, animal nutrition and agricultural services across numerous countries. Remaining privately owned has helped preserve the family’s substantial ownership through six generations. The family’s roots remain closely associated with Minneapolis, Minnesota, where Cargill established its early operations.
Pritzker family
Estimated net worth: $53.2 billionAlthough Hyatt Hotels is the name most closely linked with the Pritzker family, its wealth extends well beyond hospitality. Family investments cover manufacturing, finance, technology, healthcare and several other industries, creating one of the country’s most diversified fortunes. Based in Chicago, the family has maintained its business interests through five generations while remaining active in both business and philanthropy.
Duncan family
Estimated net worth: $43 billionThe Duncan family’s fortune has been built through the energy infrastructure business rather than oil production itself. Its wealth is closely linked to pipeline networks that transport crude oil, natural gas and related products across the United States. Operating from Houston, Texas, the family has benefited from decades of growth in the energy sector. Four generations now share ownership of this long-standing business empire.
Cathy family
Estimated net worth: $40.2 billionThe Cathy family is best known as the owners of Chick-fil-A, one of America’s largest fast-food restaurant chains. Founded by S. Truett Cathy, the business has grown steadily while remaining privately owned and family-controlled. Unlike many restaurant companies that expanded through public listings, Chick-fil-A has stayed under family ownership across four generations. The company’s headquarters remain in Atlanta, Georgia.
S.C. Johnson family
Estimated net worth: $39 billionThe S.C. Johnson family has built its fortune through household cleaning and consumer products sold worldwide. Products from the company have been used in homes for generations, helping establish a stable manufacturing business with global reach. Seven generations of the family have maintained ownership, making it one of the oldest family fortunes on the list. The company continues to operate from its long-time base in Racine, Wisconsin.
Cox family
Estimated net worth: $38 billionThe Cox family’s wealth comes from media and communications businesses developed over more than a century. What began with newspapers gradually expanded into television, radio, broadband and digital services. Although the media industry has changed significantly, the family has continued to adapt while retaining ownership across five generations. Headquartered in Atlanta, Georgia, the Cox family rounds out the list of America’s ten richest families in 2026.
