No. 28 Holding Family
Robert Earl Holding’s heirs own Wyoming-based Sinclair Oil and Gas, which the late patriarch purchased in 1976. The following year, Holding acquired Idaho’s Sun Valley Resort, one of the last family-owned ski resorts in the country. His heirs also retain ownership of Utah’s Snowbasin Resort, a property with 3,000 skiable acres noted for its environmental stewardship.
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