The Walton family, who own about 54% of retail giant Wal-Mart, continue to be the wealthiest family in the US for a second straight year with a combined fortune of about $149bn (£95bn, €134bn), according to Forbes.
However, the fortune of six heirs of Wal-Mart founders Sam Walton and James "Bud" Walton declined from $152bn in 2014, due to a decline in the shares of Wal-Mart. The fortune is held by Sam's three living children and daughter-in-law, and Bud's two daughters.
Second on the list were the Koch family with a net worth of $86bn. Koch Industries, led by siblings David and Charles, is a diversified conglomerate with more than $100bn in sales.
The Mars family comes in at number three, with a fortune of $80bn. Siblings Forrest Jr, Jacqueline and John own 100% of Mars, the largest candy company in the world with $33bn in sales.
The Cargill-MacMillan family and the Cox family come in at number four and five with $45bn and $34.5bn fortunes, respectively.
The Cargill-MacMillan family wealth was shared by an estimated 23 members, including 14 billionaires. They own 88% of agribusiness giant Cargill Inc, America's largest private company, with $128bn in yearly revenues.
The Cox fortune is shared by three family members who own Cox Enterprises, a company that deals with cable TV, broadband, newspapers, TV and radio stations.
The top 10 richest American families are mentioned in the list below:
|2||Koch||$86bn||Koch Industries (conglomerate)|
|4||Cargill-MacMillan||$45bn||Cargill Inc. (agribusiness)|
|5||Cox||$34.5bn||Cox Enterprises (media)|
|6||Hearst||$32bn||Hearst Corp (media)|
|7||Pritzker||$30bn||Hyatt Hotels (hospitality)|
|8||S.C. Johnson||$28.8bn||S.C. Johnson (consumer chemicals)|
|9||(Edward) Johnson||$26bn||Fidelity (mutual funds)|
|10||Duncan||$22.4bn||Enterprise Products Partners (oil and gas pipeline)|