• Agroman (construction)
• Altadis (tobacco and logistics)
• Almirall Prodesfarma (pharmaceuticals)
• Astra (guns)
• Banco Bilbao Vizcaya Argentaria (BBVA) (banking)
• Banco Popular (banking)
• CAF - Construcciones y Auxiliar de Ferrocarriles (railway carriages)
• CASA (Construcciones Aeronáuticas SA) (aircraft)
• Cepsa (oil)
• El Corte Inglés (department stores)
• Endesa (electricity)
• Eroski (distribution)
• Expal (ammunition)
• Explosivos Río Tinto (explosives)
• Festina (watches)
• Fomento de la Construcción (construction)
• Freixenet (wine)
• Gas Natural (energy)
• La Caixa (savings bank)
• Lladró (porcelain figures)
• Iberia (Líneas Aéreas de España) (national airline)
• Iberdrola (industrial group)
• iCodsi Labs (High skilled software development - Encryption, Comunications, Network tools, Low level linux development)
• Inditex (Zara) (textiles)
• Majorica (jewelry)
• Mapfre (insurances)
• Mondragón Corporación Coooperativa (cooperative holding)
• NH Hoteles (hotels)
• Pascual Hermanos (food)
• RENFE (national railways)
• Repsol YPF (oil)
• Santander Central Hispano (banking)
• SEAT (cars)
• SEPI (Sociedad Estatal de Participaciones Industriales) (Government holding company)
• Sol Meliá (hotels)
• Spanair (airline)
• Talgo (railway locomotives and carriages)
• Telefónica (telecommunications)

See lists of companies for companies of other countries.