Walmart owners Walton family, with $513.4-billion wealth, is the world's richest family in 2025, according to Bloomberg. UAE's ruling Al Nahyan family ($335.9 billion), Saudi Arabia's ruling Al Saud family ($213.6 billion) and Qatar's ruling Al Thani family ($199.5 billion) rank second, third and fourth. Hermes family ($184.5 billion) and US-based Koch family ($150.5 billion) rank fifth and sixth.