Great Portland Estates Plc engages in the provision of property investment and development business. The firm invests in and develops central London real estate. Its property portfolio includes ready to fit spaces, which includes One Newman Street, The Hickman, Carrington House, Kingsland House, Elm Yard, wells & more, and Kent House; fully managed spaces, which include SIX, Bramah House, Woolyard, 19/23 Wells Street, Whittington House, 16 Dufour's Place, 166 Piccadilly, 134 Wigmore Street, 175 Piccadilly, 52 Jermyn Street; retail spaces, which include Mount Royal, Hanover, 70-88 Oxford Street, 50 Finsbury Square, 103-113 Regent Street. Its subsidiaries include Great Portland Estates Services Limited, Collin Estates Limited, Courtana Investments Limited, G.P.E. (Bermondsey Street) Limited, 73/77 Oxford Street Limited, GPE (Brook Street) Limited, GPE (GHS) Limited, GPE (Dufour’s Place) Limited, GPE (Bramah House) Limited, The Rathbone Place Partnership (G.P. 1) Limited, and others.