QinetiQ is a British multinational defence technology company headquartered in Farnborough, Hampshire. It is the world's 52nd-largest defence contractor measured by 2011 defence revenues, and the sixth-largest based in the UK. It is the part of the former UK government agency, Defence Evaluation and Research Agency (DERA), which was privatised in June 2001. The remainder of DERA was renamed Dstl. It has major sites at Farnborough, Hampshire, MoD Boscombe Down, Wiltshire, and Malvern, Worcestershire, former DERA sites. It has made numerous acquisitions, primarily of United States-based companies. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.