Columbia Property Trust, Inc. operates as a real estate investment trust (REIT), which owns and operates commercial real estate properties. Its segments include New York, San Francisco, Washington, D.C., Boston, and all other office markets. It acquires, develops, redevelops, owns, leases, and operates real properties directly, through wholly owned subsidiaries, or through joint ventures. Its primary objective is to generate long-term stockholder returns from a combination of steadily growing cash flows and appreciation in its net asset values, through the acquisition and ownership of office buildings located in high-barrier-to-entry markets. Its portfolio consists of office properties located primarily in Central Business Districts (CBD) within high-barrier costal office markets (gateway markets). It owns approximately 15 operating properties and four properties under development or redevelopment.