The 25-story Class A office tower in Houston's Westchase District known as 2500 CityWest traded hands, according to an announcement by investment advisory firm Holliday Fenoglio Fowler L.P. Owner Thomas Properties Group Inc. and its affiliate TPG/CalSTRS L.L.C. contracted with HFF to market the 578,284-square-foot property on its behalf, along with two parcels of adjacent land totaling 6.3 acres.