Roig is president of Mercadona, Spain's largest food retailer. The Valencia-based company operates more than 1,600 supermarkets across the country and had revenue of 38.2 billion euros ($44.6 billion) in 2025. The closely held chain sells its own-branded products, including Hacendado grocery line and Deliplus cosmetics.
The majority of Roig's fortune is derived from Valencia, Spain-based Mercadona, the largest food retailer in Spain with more than 1,600 stores, according to the company website.
Roig owns a 50.7% stake through a Valencia-based holding company, Finop SL, according to company filings. His wife, Hortensia Herrero, owns another 27.7% through her own holding company. Roig isn't credited with Herrero's stake in this analysis because of her status as co-founder.
Mercadona had revenue of 38.2 billion euros ($44.6 billion) in 2025 and net profit of 1.7 billion euros in 2025. The closely held company is valued using the average enterprise value-to-sales and enterprise value-to-Ebit multiples of three comparable publicly traded peer companies: Jeronimo Martins, Carrefour and Sainsburys. The valuation was updated on April 23, 2026, to reflect 2025 financial results and this led to an increase in the calculation of about $3 billion.
The value of his cash investments is based on an analysis of closely held company dividends, market performance, insider transactions, taxes and charitable contributions, as well as his funding for the Valencia Basket Club and his Angels Capital venture fund.
A Mercadona spokeswoman didn't respond to a request for comment on the net worth calculation.
Juan Roig was born in 1949 in the city of Valencia, Spain, the son of Francisco Roig and Trinidad Alfonso. His parents ran Industrias Carnicas Roig, a small chain of butcher shops that they converted into a regional grocery chain in 1977.
After completing a degree in economics, Roig, along with his wife Hortensia Herrero and siblings Fernando, Trinidad and Amparo, bought control of the shops in 1981. A number of innovations were introduced as the company began expanding outside of Valencia, including bar code scanners at cash registers in 1982, and an automated distribution center in nearby Ribarroja, Spain that they opened six years later.
Roig and his wife became the majority owners in 1991 when they bought out his siblings. To combat market share gains by international competitors such as Boulogne Billancourt, France-based Carrefour, Mercadona began lowering prices and offering cheaper store-branded product lines. It also made all staffers full-time employees, an unusual practice for Spanish retail companies, according to David Bain, London-based head of research at Campden Wealth, an organization for the world's wealthiest family businesses. The formula proved successful. Since the end of 2007, amid a recession, austerity programs and rising unemployment, revenue rose 36 percent, making it the country's largest food retailer.
Outside of Mercadona, Roig's main passion is sport. He has helped fund and support Valencia Basket Club, the city's basketball team, and is a regular spectator at their games.