Aena’s 46 airports in Spain handle 99.9% of the country's air traffic. Its three busiest airports—Madrid-Barajas, Barcelona-El Prat, and Palma de Mallorca—account for roughly half of Spain’s passengers. The dual-till framework in Spain leaves its commercial and real estate businesses completely unregulated, allowing the group to monetize its passenger flow and earn economic rents. It is launching a transformational EUR 13 billion DORA III investment cycle (2027-31) to expand capacity across its Spanish network. The group also controls three airports in the UK (Luton, Leeds Bradford, and Newcastle) and 18 airports in Brazil. It has minority holdings in 12 airports in Mexico and two in Jamaica through its 6.4% look-through stake in Grupo Aeroportuario del Pacifico.