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HOUSTON — Black Stone Minerals, a fee mineral and royalty owner, has expanded by 13,119 square feet, renewing its headquarters lease for a total of 55,082 square feet at First City Tower in downtown Houston. Chip Colvill and Michael Anderson of Colvill Office Properties represented the landlord, FC Tower Property Partners, LP, an affiliate of Chicago-based JMB Realty. Trey Strake of Cushman & Wakefield represented Black Stone Minerals. First City Tower is a 49-story, 1.3 million-square-foot office building that occupies one city block bounded by Fannin, McKinney, San Jacinto and Lamar streets in Houston's central business district.