Rolls-Royce Group plc is a global power systems company headquartered in the City of Westminster

City of Westminster

The City of Westminster is a London borough occupying much of the central area of London, England, including most of the West End. It is located to the west of and adjoining the ancient City of London, directly to the east of the Royal Borough of Kensington and Chelsea, and its southern boundary...

, London, United Kingdom. It is the world’s second-largest maker of aircraft engines (behind General Electric

General Electric

General Electric Company , or GE, is an American multinational conglomerate corporation incorporated in Schenectady, New York and headquartered in Fairfield, Connecticut, United States...

), and also has major businesses in the marine propulsion and energy sectors. Through its defence-related activities it is the world's 23rd-largest defence contractor

Defense contractor

A defense contractor is a business organization or individual that provides products or services to a military department of a government. Products typically include military aircraft, ships, vehicles, weaponry, and electronic systems...

. It had an announced order book of £58.3 billion at 31 December 2009.

Rolls-Royce is listed on the London Stock Exchange

London Stock Exchange

The London Stock Exchange is a stock exchange located in the City of London within the United Kingdom. , the Exchange had a market capitalisation of US$3.7495 trillion, making it the fourth-largest stock exchange in the world by this measurement...

 and is a constituent of the FTSE 100 Index

FTSE 100 Index

The FTSE 100 Index, also called FTSE 100, FTSE, or, informally, the footsie , is a share index of the 100 most highly capitalised UK companies listed on the London Stock Exchange....

.