starwood property trust, inc. operates as a real estate investment trust (reit) in the united states and europe. it operates through commercial and residential lending, infrastructure lending, property, and investing and servicing segments. the commercial and residential lending segment originates, acquires, finances, and manages commercial and residential first mortgages, subordinated mortgages, mezzanine loans, preferred equity, commercial mortgage-backed securities (cmbs), residential mortgage-backed securities, and other real estate and real estate-related debt investments. the infrastructure lending segment originates, acquires, finances, and manages infrastructure debt investments. the property segment acquires and manages equity interests in commercial real estate properties, including multi-family properties. the investing and servicing segment manages and works out problem assets; acquires and manages unrated, investment grade, and non-investment grade rated cmbs, including su