Walton, Koch, Mars: America's 10 Richest Families Top $1 Trillion

America's 10 wealthiest families are worth more than $1 trillion combined, led by the Waltons at $520 billion. The Walton fortune, rooted in Walmart, dwarfs every other family dynasty on the list. The Koch family ranks second at $148 billion, built on Koch Industries' energy, chemicals, and commodities empire. Mars Inc., the candy and pet-food giant, puts the Mars family at $120 billion. The Johnsons of Fidelity Investments follow at $48 billion. The Cargill-MacMillan clan, tied to the agricultural trading house Cargill, holds $47 billion. The Lauder family, behind Estée Lauder, is worth $38 billion. The S.C. Johnson family, controlling the cleaning-products company, sits at $37 billion. The Pritzker family, with Hyatt Hotels and industrial holdings, holds $36 billion. The Cox family, which owns Cox Communications and Cox Automotive, is valued at $35 billion. The Mellon family, with roots in banking and energy, rounds out the top 10 at $32 billion. The combined total exceeds $1.06 trillion. The list underscores how long-term private ownership in retail, energy, food, finance, and consumer goods concentrates wealth across generations. Public-market volatility has not eroded these fortunes the way it has hit tech billionaires whose wealth is tied to single stocks. The Waltons alone are worth more than the combined net worth of the next three families. Walmart's global retail operations, spanning 10,500 stores in 20 countries, generate roughly $600 billion in annual revenue. The Kochs have diversified beyond oil into paper, fertilizer, and financial services. Mars runs a private empire with $45 billion in sales across pet care, candy, and food. The Cargill-MacMillan fortune reflects Cargill's position as one of the world's largest private companies, with $177 billion in revenue. The list changes slowly. No family dropped out of the top 10 in 2026. The threshold to enter the top 10 now stands at $32 billion, up from $28 billion in 2025.