Banco Santander is a holding company, providing a range of financial products. Co.'s products and services include: retail banking business that covers all customer banking businesses; wholesale banking business; as well as asset management and insurance business. Co.'s principal operations are in Spain, the U.K., Portugal, Germany, Italy and Latin America. As of Dec 31 2014, Co.'s total assets amounted to Euro1,266,296,000,000 and total customer deposits amounted to Euro647,627,000,000.

Distribuidora Internacional De Alimentacion is a supermarket and convenience store group based in Spain. Co. is engaged in the retail trade of food through cut-price self-service supermarkets and franchise establishments. Co. is engaged in the operation of stores located in Spain, France, Portugal, Turkey, Argentina, Brazil and China.

Red Electrica is engaged in the transmission of electrical energy, the operation of the system and the management of the transmission network in the Spanish electricity system. In addition, through its subsidiaries, Co. is engaged in the acquisition, holding and management of foreign securities, co-ordination of international exchanges, provision of telecommunications services for third parties, provision of consultancy, engineering and construction services outside the Spanish electricity system, securing of funds, carrying out of financial transactions and provision of financial services.

Repsol is an oil and gas company. Co. is engaged in all the activities relating to the oil and gas industry, including exploration, development and production of crude oil and natural gas, transportation of oil products, liquefied petroleum gas (LPG) and natural gas, refining, the production of a wide range of oil products and the retailing of oil products, oil derivatives, petrochemicals, LPG and natural gas, as well as the generation, transportation, distribution and supply of electricity. Co. operates in more than 40 countries. Co.'s operations are divided into four segments: Upstream, Downstream, LNG and Gas Natural Fenosa.

Viscofan is the parent company of the Viscofan Group. Co. is divided into two major operational subgroups. The companies comprising the Naturin GmbH subgroup are engaged in the manufacture and distribution of artificial casings (small and big diameter collagen and plastics) for the meat industry. Through its wholly-owned subsidiary IAN, S.A., Co. also manufactures and distributes canned vegetables (asparagus, olives and tomato).