Spain unveiled a plan to privatize 49% of its state-owned airport operator Aeropuertos Españoles y Navegacion Aerea (AENA) hoping to attract a bloc of long-term investors prior to a listing in November. AENA holds stakes in more than 20 international airports and operates Spain’s 46 airports, including Madrid and Barcelona.

Last year AENA took control of London´s Luton airport in a joint deal with Ardian, a U.K-based private equity group. In terms of passengers, AENA is the biggest airport operator in the world as it handled 187.3 million passengers a year in 2013, more than Paris and Frankfurt airports put together.