Maria Concepción Ortuño Sierra

Cementos Portland Valderrivas SA engages in cement and building materials manufacturing and has interests in real estate and financial services. It operates through the following segments: manufacture and sale of cement, concrete, aggregates, mortar and others. The company was founded in 1903 and is headquartered in Pamplona, Spain.

DS Smith Spain SA engages in the manufacturing and commercialization of paper and cardboard products and the generation of electricity. It operates through the following business segments: Paper, Carton, Energy and Other segments. The Paper segment produces, recycles, and commercializes paper products for packaging systems. The Carton segment provides flat and corrugated cardboard products for boxes. The Energy segment generates electricity. The company was founded in 1890 and is headquartered in Alcobendas, Spain.

Cementos Alfa SA manufactures and distributes cement, concrete, and mortar products. These include gray, white, and waterproof variants, which are available in bags and in bulk. They also offer transportation and dispensing equipment. The firm was founded in 1930, and ios based in Santander, Spain

Uniland Cementera SA manufactures and distributes cement. Its products include clinker, low-alkali clinker, and landfort variants. The company is headquartered in Barcelona, Spain.