Great Portland Estates plc (GPE) is a British property development and investment company focused primarily on central London real estate. Founded in 1959 and listed on the London Stock Exchange, it is a constituent of the FTSE 250 Index and converted to a Real Estate Investment Trust (REIT) in 2007. GPE owns and manages a diversified portfolio of office and retail properties, with key holdings in areas such as Marylebone, Hanover Square, Fitzrovia, and the City of London. The company specializes in unlocking value through property development, leasing, and asset management, serving a wide range of occupiers including media, technology, finance, and professional services. As of March 2024, its property portfolio was valued at approximately £1.9 billion. GPE is headquartered in London and emphasizes sustainable development and innovation in its operations.