Air France-KLM is an airline company. The Company's core business is passenger transportation and represented approximately 80% of revenues at March 31, 2009. Its activities also include cargo, aeronautics maintenance and other air-transport related activities, including principally catering and charter services. The Company has three core businesses: passenger transport, cargo transport and aircraft maintenance services. As of March 31, 2009, the Air France-KLM Company fleet comprised 641 aircraft, of which 621were operational. The main fleet consists of 429 aircraft, of which 164 long-haul aircraft, including six at Martinair; 29 cargo aircraft; including 11 at Martinair and 236 medium-haul aircraft, including 35 aircraft in the transavia.com group fleet. The regional fleet comprises 212 aircraft. On March 25, 2009, the Company announced the acquisition of a 25% stake in Alitalia.