ArcelorMittal Olaberria is found in Gipuzkoa and forms ArcelorMittal Gipuzkoa together with Bergara and Zumarraga.
The three companies belong to Largos Europa. The Olaberria installations produce 1,000,000 tons/year of semifinished steel and 900,000 tons/year of finished products.
The manufactured products are mainly used in the building and naval construction industries.