Starwood Property Trust Inc is an American real estate investment trust principally engaged in originating, acquiring, and managing commercial mortgage loans and commercial mortgage-backed securities in the U.S. and Europe. The company organizes its activities into Lending, Investing and Servicing, and Property segments. Starwood derives the vast majority of its revenue from its Lending and Investing and Servicing divisions. The former acquires and finances first mortgages, or mortgages with primary lien positions. The collateral for these mortgages are mainly office and hospitality properties in the American West and Northeast. Starwood's Investing and Servicing unit primarily generates revenue from the acquisition and sale of commercial mortgage-backed securities.