Banco Santander, S.A., doing business as Santander Group (/ ˌ s ɑː n t ɑː n ˈ d ɛər /), is a Spanish multinational commercial bank and financial services company founded and based in Santander, Spain.In addition to hubs in Madrid and Barcelona, Santander maintains a presence in all global financial centres as the largest Spanish banking institution in the world.

