By the end of XIX century, a second generation started an electric business, installing the first electric production plant for this particular service in Bilbao. In 1901 one of the first furnaces, by Martin Siemens, was installed in the Basque Country, and continued working for more than half a century.

The growth and development of the frontrunner in the sector - "Altos Hornos de Bilbao" and "La Vizcaya", merging in 1902 to form "Altos Hornos de Vizcaya" - forced the firm to specialise in the production of quality iron and in the specialised demand or in the foundry of urban equipment (fountains, statues, balustrades, street lamps, etc.). However, the increasing quality and quantity of production by the bigger firms in the sector, above all "Altos Hornos de Vizcaya", forced them to new business ventures.

However, in the middle of the 1970's, its activity in the Grinding Balls sector had to be extended due to the increased opening in international markets. The fourth generation extended the business, firstly in the national market with the installation of a plant in Seville, and later in the international market, initially with exports and more recently with a factory in Chile to supply the South American mining market.

Today, the company holding includes a specialised engineering firm producing elastic lines for the railway and a plant for the manufacture of Compound Plates of high wear resistance. Recently it has inaugurated a new electric central using the old canal that previously was used to feed the mills and blast furnace, in order to produce electricity as an additional income for the firm.