Item 2. Properties

Our headquarters is located at 1331 L Street, NW, in downtown Washington, DC, where we occupy approximately 149,500 square feet of office space. Our lease for our headquarters expires May 31, 2025 (with two 5-year renewal options). Our headquarters is used primarily by our North America operating segment. Our principal facility in the U.K. is located in London, England, where we occupy approximately 7,000 square feet of office space. Our lease for this facility has a maximum term ending July 8, 2023, with early termination available at our option on July 9, 2018, with advance notice. This facility is used primarily by our International operating segment.

In addition to two downtown Washington, DC leased facilities (including our headquarters) and our London, England facility, our research operations are principally run out of leased spaces in San Diego, California; Columbia, Maryland; Atlanta, Georgia; and Glasgow, Scotland. Additionally, we lease office space in a variety of other metropolitan areas. These locations include, among others, the following: Boston, Massachusetts; Chicago, Illinois; Los Angeles, California; Norcross, Georgia; and San Francisco, California.

We believe these facilities are suitable and appropriately support our business needs.