Rolls-Royce Holdings plc is a British multinational public limited company incorporated in February 2011 that owns Rolls-Royce, a business established in 1904 and today designs, manufactures and distributes power systems for aviation and other industries. Rolls-Royce is the world’s second-largest maker of aircraft engines and has major businesses in the marine propulsion and energy sectors. All of its shares are tradeable on the London Stock Exchange and other markets. Rolls-Royce was the world's 16th-largest defence contractor in 2011 and 2012 when measured by defence revenues. It had an announced order book of £71.6 billion as of January 2014.