What company operates properties for MGM Growth Properties LLC and owns 50 percent of CityCenter in Las Vegas?
MGM Growth Properties:  As of December 31, 2016, the company owned 11 properties operated by MGM Resorts International, comprising 27,233 hotel rooms. MGM Resorts International:  MGM Resorts owns 50 percent of CityCenter in Las Vegas, which features ARIA Resort & Casino.
MGM Resorts International