Hammerson plc is a major British property development and investment company. The firm switched to real estate investment trust (REIT) status when they were introduced in the United Kingdom in January 2007. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index; it is also a constituent of the FTSE EPRA/NAREIT Developed Europe index, among others. The majority of Hammerson's portfolio is in the United Kingdom, but is also operates in continental Europe, including operations in France, Ireland, Spain, and Germany. It invests mainly in offices and retail premises.