Aena SME SA is a Spanish airport operator with various airports in Spain, including Madrid and Barcelona, and has stakes in multiple international airports. The group generates regulated and nonregulated revenue. Regulated revenue includes fees collected from takeoff and landing, passenger fees and security, whereas nonregulated revenue stems from commercial activities such as retail, food and beverage and advertising sales. The Group carries out its business activities in the following segments: Airports; Real estate services; Region de Murcia International Airport (AIRM) and International.