1) Company of Spain 
Sociedad Estatal de Correos y Telégrafos, S.A., trading as Correos, is the national postal service of Spain, as recognized by the Universal Postal Union. The company is 100% state owned, through the State Industrial Holding Company (SEPI). With 63,000 employees and 5.4 billion pieces of mail sent each year, Correos is one of the largest postal se...