(Bloomberg) Among the nation’s billionaires, one of the most sought-after pieces of real estate right now is a quiet storefront in Sioux Falls, South Dakota.

A branch of Chicago’s Pritzker family rents space here, down the hall from the Minnesota clan that controls the Radisson hotel chain, and other rooms held by Miami and Hong Kong money.

Don’t look for any heiresses in this former five-and-dime. Most days, the small offices that represent these families are shut. Even empty, they provide their owners with an important asset: a South Dakota address for their trust funds.

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