Alice Walton, one of the Walmart heirs, got $33 billion richer last year off of her investments, primarily Walton family trusts. She is now worth $120 billion. She doesn't hold a run a company or sit on a corporate board, but is an art patron and philanthropist.  https://fortune.com/2026/09/25/alice-walton-got-33-billion-richer-last-year-without-running-a-company-shes-building-a-tuition-free-medical-school-instead/