Banco Español de Crédito, S.A., “Spanish Credit Bank”) better known as Banesto, was a Spanish multinational financial services company. Prior to the Spanish Government's historical intervention in 1993, the very first in the history of banking, Banesto was the third-largest financial group in Spain, operating around 1,770 branches, as well as the fifth-largest company of the IBEX 35. The ambitious capital increase planned in 1993 by its Executive Chairman Mario Conde together with J.P. Morgan became the biggest restructuring plan in the history of Europe, involving asset sales and a rights issue of US$1.2 billion, after which Banesto was expected to become the largest financial firm in Europe. Although initially accepted by the Bank of Spain, it was later frustrated following intervention on the basis of financial transparency.

Banco Santander S.A. doing business as Santander Group, is a Spanish multinational financial services company based in Madrid and Santander in Spain. Additionally, Santander maintains a presence in all global financial centres as the 19th-largest banking institution in the world. Although known for its European banking operations, it has extended operations across North and South America, and more recently in continental Asia. It is considered a systemically important bank by the Financial Stability Board.