Jóse Carlos Rebanal Vargas

General de Bombeo de Hormigones SL operates as a engineering and construction company that specializes in concrete pumping services. The firm offers stationary pumps, hydraulic distributors, special robots for tunnels, testing laboratory and mixers services. The company was founded in 2002 and is headquartered in Alcorcon, Spain.

Prefabricados Castelo SA provides prefabricated structures to the construction industry. Its business activities are carried out in three divisions: engineering, manufacturing, and erection. Its products include columns, beams, supports, vaults, bridge crossbeams, hollow core slabs, precast slabs, facade panels, and purlings. The company offers solutions to public works, industrial buildings, special works, prefabricated houses, and dwelling construction. Prefabricados Castelo was founded in 1958 and is headquartered in O Porriño, Spain.

Bertelsmann SE & Co. KGaA engages in the provision of services related to media and education. It operates through the following segments: RTL Group, Penguin Random House, Gruner + Jahr, BMG, Arvato, Bertelsmann Printing Group, Bertelsmann Education Group, and Bertelsmann Investments. The RTL Group segment specializes in radio and television production. The Penguin Random House segment publishes books. The Gruner + Jahr segment focuses on magazines. The BMG segment engages in music production. The Arvato segment offers technology services. The Bertelsmann Printing Group segment unites the printing activities of the Bertelsmann Group. The Bertelsmann Education Group segment encompasses the overall education business. The Bertelsmann Investments segment comprises start-up and fund investments. The company was founded by Carl Bertelsmann in 1835 and is headquartered in Guetersloh, Germany.