Grupo Aeroportuario del Sureste SA de CV is a holding company, which engages in the operation, maintenance, and development of airports It operates through the following segments: Cancun, Aerostar, Airplan, Villahermosa, Merida, Holding and Services, and Other. The company is headquartered in Mexico City, Mexico, D.F. and currently employs 1,787 full-time employees. The company went IPO on 2000-09-28. The company and its subsidiaries hold concessions to operate, maintain and develop approximately nine airports in the southeast region of Mexico, as well as over 10 airports in Colombia. The firm operates through segments, including Cancun airport and subsidiaries (Cancun), the Villahermosa Airport (Villahermosa), the Merida airport (Merida) and Services. The airports are located in Cancun, Cozumel, Merida, Huatulco, Oaxaca, Veracruz, Villahermosa, Tapachula and Minatitlan, Mexico, and in Medellin, Colombia, among others. Approximately eight Mexican and over 80 international airlines, including the United States-based airlines, such as American Airlines and United Air Lines are operating directly or through code-sharing arrangements in its airports. The company provides airport security services at its airports through third-party contractors. The company also provides firefighting, rescue and aircraft maintenance services.