BAE Systems plc is a British multinational defence, aerospace and security company. It was formed on 30 November 1999 and is headquartered at 6 Carlton Gardens in London. The group develops, engineers, manufactures and supports military platforms, weapon systems, electronics, cyber and digital services across air, land, sea and space domains. It is the largest defence contractor in Europe and one of the largest globally.
The company employs more than 110,000 people and operates in over 40 countries. Its main business areas span Electronic Systems, Platforms & Services, Air, Maritime, and Cyber & Intelligence. In the United States it runs a separate business, BAE Systems Inc., under a Special Security Agreement led by its own leadership and board. Other significant operations sit in Australia, Canada, Poland, Saudi Arabia and Japan.
BAE Systems is listed on the London Stock Exchange under the ticker BA. and is a constituent of the FTSE 100 index. For the year ended 31 December 2025 it reported revenue of £28.336 billion, and it held an order backlog of £83.6 billion at the end of that year. As of July 2026 its market capitalisation was about $74.88 billion. The business is led by Chief Executive Charles Woodburn, with Cressida Hogg as Chair and Brad Greve as Chief Financial Officer.