Songbird Estates plc is engaged in management of its investment in its main subsidiary, Canary Wharf Group plc (Canary Wharf Group), which is the holding company. Canary Wharf Group is engaged in integrated property development, investment and management focusing primarily on the Estate. In London, Canary Wharf Group is engaged through joint ventures in the redevelopment of 20 Fenchurch Street and the Shell Centre. Canary Wharf Group�s investment property portfolio consists of 16 completed properties (out of the approximately 35constructed on the Estate) totaling approximately seven meter square feet of net internal area (NIA). In July 2013, Songbird Estates plc's Canary Wharf Group plc completed the acquisition from Gort Limited (in administration) and Hibernia (2005) Limited (in administration), of 15 Westferry Circus at Canary Wharf.