Grupo Aeroportuario del Sureste (ASUR) is a Mexican holding company that operates airports across three geographic markets: nine airports in Mexico's southeast region under 50-year concessions, six Colombian airports through subsidiary Airplan, a major airport in Puerto Rico through Aerostar, and recently acquired commercial operations at major U.S. airport terminals. The company generates revenues from three core sources: aeronautical services (passenger charges, landing and parking fees, security services), non-aeronautical services (commercial leases to retailers, restaurants, and car rental agencies, plus parking and ground transport), and construction services for required airport infrastructure improvements. In its primary Mexican market, which serves Mexico's leading tourism destination, aeronautical revenues are subject to regulated price caps adjusted for inflation, while non-aeronautical commercial revenues remain largely unrestricted, allowing the company to capture upside from retail and hospitality activities within its airports.