Item 2. Properties

Our headquarters is located at 1331 L Street, NW, in downtown Washington, DC, where we occupy approximately 157,480 square feet, of which 7,980 square feet is a sublease expiring January 31, 2019, and the remaining 149,500 square feet is a lease that 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, where we occupy approximately 15,900 square feet of office space. Our lease for this facility has a term ending August 31, 2025. This facility is used by our International operating segment.

In addition to our downtown Washington, DC leased facility and our London facility, we established our research operations headquarters in Richmond, Virginia in 2016, in which we occupy 132,987 square feet of office space. In addition to the Richmond research facility, we also operate our research functions 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: Austin, Texas; Boston, Massachusetts; Chicago, Illinois; Irvine, California; Los Angeles, California; and San Francisco, California.

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