Sign up today for the CNBC Sport Newsletter Walmart heir Lukas Walton and his wife, Samantha, have acquired a minority stake in the Chicago Bulls and the United Center, the team announced Friday. The transaction involves the purchase of existing stakes from limited partners and does not provide Walton with a path to controlling ownership, the team said. The size of the minority stake and the valuation were not disclosed. The Reinsdorf family remains the controlling owner of the Chicago Bulls.